autom8-cli 0.3.0

use crate::error::{Autom8Error, Result};
use serde::{Deserialize, Serialize};
use std::env;
use std::fs;
use std::path::PathBuf;

/// The base config directory name under ~/.config/
const CONFIG_DIR_NAME: &str = "autom8";

// ============================================================================
// State Machine Configuration
// ============================================================================

/// Configuration for controlling which states are executed in the autom8 state machine.
///
/// This struct represents the user's preferences for which steps of the automation
/// pipeline should be executed. Each field corresponds to a state in the state machine.
///
/// # Default Behavior
///
/// By default, all states are enabled (`true`), meaning the full pipeline runs:
/// review → commit → pull request.
///
/// # Serialization
///
/// This struct supports TOML serialization via serde. Missing fields in a config file
/// will default to `true`, allowing partial configs to work correctly.
///
/// # Example
///
/// ```toml
/// # Enable/disable the review state (code review before committing)
/// review = true
///
/// # Enable/disable the commit state (creating git commits)
/// commit = true
///
/// # Enable/disable the pull request state (creating PRs)
/// pull_request = true
/// ```
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct Config {
    /// Whether to run the review state.
    ///
    /// When `true`, code changes are reviewed before committing.
    /// When `false`, the review step is skipped.
    #[serde(default = "default_true")]
    pub review: bool,

    /// Whether to run the commit state.
    ///
    /// When `true`, changes are committed to git.
    /// When `false`, changes are left uncommitted.
    #[serde(default = "default_true")]
    pub commit: bool,

    /// Whether to run the pull request state.
    ///
    /// When `true`, a pull request is created after committing.
    /// When `false`, no PR is created.
    #[serde(default = "default_true")]
    pub pull_request: bool,

    /// Whether to create pull requests in draft mode.
    ///
    /// When `true`, PRs are created as drafts (not ready for review).
    /// When `false`, PRs are created as regular (ready for review) PRs.
    ///
    /// Note: Only applies when `pull_request = true`. Has no effect otherwise.
    #[serde(default = "default_false")]
    pub pull_request_draft: bool,

    /// Whether to automatically create worktrees for runs.
    ///
    /// When `true`, autom8 creates a dedicated worktree for each run,
    /// enabling multiple parallel sessions for the same project.
    /// When `false`, autom8 runs on the current branch (default behavior).
    ///
    /// Note: Requires a git repository. Has no effect outside of git repos.
    #[serde(default = "default_true")]
    pub worktree: bool,

    /// Pattern for worktree directory names.
    ///
    /// Placeholders:
    /// - `{repo}` - The repository name
    /// - `{branch}` - The branch name (slugified: slashes replaced with dashes)
    ///
    /// Default: `{repo}-wt-{branch}`
    /// Example: For repo "myproject" and branch "feature/login", creates "myproject-wt-feature-login"
    #[serde(default = "default_worktree_path_pattern")]
    pub worktree_path_pattern: String,

    /// Whether to remove worktrees after successful completion.
    ///
    /// When `true`, autom8 automatically removes the worktree directory after
    /// a successful run (Completed state). Failed runs keep their worktrees.
    /// When `false`, worktrees are preserved for manual inspection/cleanup.
    ///
    /// Note: Only applies when `worktree = true`. Has no effect otherwise.
    #[serde(default = "default_false")]
    pub worktree_cleanup: bool,
}

/// Default worktree path pattern.
fn default_worktree_path_pattern() -> String {
    "{repo}-wt-{branch}".to_string()
}

/// Helper function for serde default values (true).
fn default_true() -> bool {
    true
}

/// Helper function for serde default values (false).
fn default_false() -> bool {
    false
}

impl Default for Config {
    fn default() -> Self {
        Self {
            review: true,
            commit: true,
            pull_request: true,
            pull_request_draft: false,
            worktree: true,
            worktree_path_pattern: default_worktree_path_pattern(),
            worktree_cleanup: false,
        }
    }
}

// ============================================================================
// Config Validation
// ============================================================================

use std::error::Error;
use std::fmt;

/// Error type for configuration validation failures.
///
/// This enum represents specific validation errors that can occur when
/// validating configuration settings. Each variant provides a clear,
/// actionable error message.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ConfigError {
    /// Pull request is enabled but commit is disabled.
    ///
    /// Creating a pull request requires commits to exist, so this
    /// configuration combination is invalid.
    PullRequestWithoutCommit,
}

impl fmt::Display for ConfigError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ConfigError::PullRequestWithoutCommit => {
                write!(
                    f,
                    "Cannot create pull request without commits. \
                    Either set `commit = true` or set `pull_request = false`"
                )
            }
        }
    }
}

impl Error for ConfigError {}

/// Validate a configuration for logical consistency.
///
/// This function checks that the configuration settings are valid and
/// consistent with each other. It should be called after loading a config
/// and before the state machine starts.
///
/// # Validation Rules
///
/// - `pull_request = true` requires `commit = true`
///   (Cannot create a PR without commits)
///
/// # Arguments
///
/// * `config` - The configuration to validate
///
/// # Returns
///
/// * `Ok(())` if the configuration is valid
/// * `Err(ConfigError)` if the configuration is invalid, with a clear error message
///
/// # Example
///
/// ```
/// use autom8::config::{Config, validate_config};
///
/// let valid_config = Config::default();
/// assert!(validate_config(&valid_config).is_ok());
///
/// let invalid_config = Config {
///     review: true,
///     commit: false,
///     pull_request: true, // Invalid: PR without commit
///     ..Default::default()
/// };
/// assert!(validate_config(&invalid_config).is_err());
/// ```
pub fn validate_config(config: &Config) -> std::result::Result<(), ConfigError> {
    // Rule: pull_request = true requires commit = true
    if config.pull_request && !config.commit {
        return Err(ConfigError::PullRequestWithoutCommit);
    }

    Ok(())
}

// ============================================================================
// Global Config File Management
// ============================================================================

/// The filename for the global configuration file.
const GLOBAL_CONFIG_FILENAME: &str = "config.toml";

/// Default config file content with explanatory comments.
///
/// This is written when creating a new config file to help users understand
/// each option without needing to reference documentation.
const DEFAULT_CONFIG_WITH_COMMENTS: &str = r#"# Autom8 Configuration
# This file controls which states in the autom8 state machine are executed.

# Review state: Code review before committing
# - true: Run code review step to check implementation quality
# - false: Skip code review and proceed directly to commit
review = true

# Commit state: Creating git commits
# - true: Automatically commit changes after implementation
# - false: Leave changes uncommitted (manual commit required)
commit = true

# Pull request state: Creating pull requests
# - true: Automatically create a PR after committing
# - false: Skip PR creation (commits remain on local branch)
# Note: Requires commit = true to work
pull_request = true

# Pull request draft mode: Create PRs as drafts
# - true: Create PRs as drafts (not ready for review)
# - false: Create PRs as regular (ready for review) PRs (default)
# Note: Only applies when pull_request = true. Has no effect otherwise.
pull_request_draft = false

# Worktree mode: Automatic worktree creation for parallel runs
# - true: Create a dedicated worktree for each run (enables parallel sessions, default)
# - false: Run on the current branch (single session per project)
# Note: Requires a git repository. Has no effect outside of git repos.
worktree = true

# Worktree path pattern: Pattern for naming worktree directories
# Placeholders: {repo} = repository name, {branch} = branch name (slugified)
# Default: {repo}-wt-{branch} (e.g., "myproject-wt-feature-login")
worktree_path_pattern = "{repo}-wt-{branch}"

# Worktree cleanup: Automatically remove worktrees after successful completion
# - true: Remove worktree directory after run completes successfully
# - false: Preserve worktrees for manual inspection/cleanup (default)
# Note: Failed runs always keep their worktrees. Only applies when worktree = true.
worktree_cleanup = false
"#;

/// Get the path to the global config file.
///
/// Returns the path to `~/.config/autom8/config.toml`.
pub fn global_config_path() -> Result<PathBuf> {
    Ok(config_dir()?.join(GLOBAL_CONFIG_FILENAME))
}

/// Load the global configuration from `~/.config/autom8/config.toml`.
///
/// If the config file doesn't exist, it creates one with default values
/// and helpful comments explaining each option.
///
/// # Returns
///
/// The loaded or newly-created default configuration.
///
/// # Errors
///
/// Returns an error if:
/// - The home directory cannot be determined
/// - The config directory cannot be created
/// - The config file cannot be read (other than not existing)
/// - The config file contains invalid TOML
pub fn load_global_config() -> Result<Config> {
    let config_path = global_config_path()?;

    if !config_path.exists() {
        // Ensure the config directory exists
        ensure_config_dir()?;

        // Create the config file with default values and comments
        fs::write(&config_path, DEFAULT_CONFIG_WITH_COMMENTS)?;

        return Ok(Config::default());
    }

    // Read and parse the existing config file
    let content = fs::read_to_string(&config_path)?;
    let config: Config = toml::from_str(&content).map_err(|e| {
        Autom8Error::Config(format!(
            "Failed to parse config file at {:?}: {}",
            config_path, e
        ))
    })?;

    Ok(config)
}

/// Save the global configuration to `~/.config/autom8/config.toml`.
///
/// This writes the configuration with explanatory comments. Note that this
/// will overwrite any existing file, including any user-added comments.
///
/// # Arguments
///
/// * `config` - The configuration to save
///
/// # Errors
///
/// Returns an error if:
/// - The home directory cannot be determined
/// - The config directory cannot be created
/// - The config file cannot be written
pub fn save_global_config(config: &Config) -> Result<()> {
    let config_path = global_config_path()?;

    // Ensure the config directory exists
    ensure_config_dir()?;

    // Generate config content with comments
    let content = generate_config_with_comments(config);

    fs::write(&config_path, content)?;

    Ok(())
}

/// Generate config file content with explanatory comments.
///
/// Creates a TOML string that includes comments explaining each option,
/// using the actual values from the provided config.
fn generate_config_with_comments(config: &Config) -> String {
    format!(
        r#"# Autom8 Configuration
# This file controls which states in the autom8 state machine are executed.

# Review state: Code review before committing
# - true: Run code review step to check implementation quality
# - false: Skip code review and proceed directly to commit
review = {}

# Commit state: Creating git commits
# - true: Automatically commit changes after implementation
# - false: Leave changes uncommitted (manual commit required)
commit = {}

# Pull request state: Creating pull requests
# - true: Automatically create a PR after committing
# - false: Skip PR creation (commits remain on local branch)
# Note: Requires commit = true to work
pull_request = {}

# Pull request draft mode: Create PRs as drafts
# - true: Create PRs as drafts (not ready for review)
# - false: Create PRs as regular (ready for review) PRs (default)
# Note: Only applies when pull_request = true. Has no effect otherwise.
pull_request_draft = {}

# Worktree mode: Automatic worktree creation for parallel runs
# - true: Create a dedicated worktree for each run (enables parallel sessions, default)
# - false: Run on the current branch (single session per project)
# Note: Requires a git repository. Has no effect outside of git repos.
worktree = {}

# Worktree path pattern: Pattern for naming worktree directories
# Placeholders: {{repo}} = repository name, {{branch}} = branch name (slugified)
# Default: {{repo}}-wt-{{branch}} (e.g., "myproject-wt-feature-login")
worktree_path_pattern = "{}"

# Worktree cleanup: Automatically remove worktrees after successful completion
# - true: Remove worktree directory after run completes successfully
# - false: Preserve worktrees for manual inspection/cleanup (default)
# Note: Failed runs always keep their worktrees. Only applies when worktree = true.
worktree_cleanup = {}
"#,
        config.review,
        config.commit,
        config.pull_request,
        config.pull_request_draft,
        config.worktree,
        config.worktree_path_pattern,
        config.worktree_cleanup
    )
}

// ============================================================================
// Project Config File Management
// ============================================================================

/// The filename for project-specific configuration files.
const PROJECT_CONFIG_FILENAME: &str = "config.toml";

/// Get the path to a project's config file.
///
/// Returns the path to `~/.config/autom8/<project>/config.toml`.
pub fn project_config_path() -> Result<PathBuf> {
    Ok(project_config_dir()?.join(PROJECT_CONFIG_FILENAME))
}

/// Get the path to a specific project's config file by name.
///
/// Returns the path to `~/.config/autom8/<project_name>/config.toml`.
pub fn project_config_path_for(project_name: &str) -> Result<PathBuf> {
    Ok(project_config_dir_for(project_name)?.join(PROJECT_CONFIG_FILENAME))
}

/// Load the project-specific configuration from `~/.config/autom8/<project>/config.toml`.
///
/// If the project config file doesn't exist, it copies the global config (with comments)
/// to the project config directory and returns the global config values.
///
/// # Returns
///
/// The loaded or inherited configuration.
///
/// # Errors
///
/// Returns an error if:
/// - The home directory cannot be determined
/// - The project config directory cannot be created
/// - The config file cannot be read (other than not existing)
/// - The config file contains invalid TOML
pub fn load_project_config() -> Result<Config> {
    let config_path = project_config_path()?;

    if !config_path.exists() {
        // Ensure the project config directory exists
        ensure_project_config_dir()?;

        // Copy global config (with comments) to project config
        let global_config = load_global_config()?;
        let content = generate_config_with_comments(&global_config);
        fs::write(&config_path, content)?;

        return Ok(global_config);
    }

    // Read and parse the existing project config file
    let content = fs::read_to_string(&config_path)?;
    let config: Config = toml::from_str(&content).map_err(|e| {
        Autom8Error::Config(format!(
            "Failed to parse project config file at {:?}: {}",
            config_path, e
        ))
    })?;

    Ok(config)
}

/// Save a project-specific configuration to `~/.config/autom8/<project>/config.toml`.
///
/// This writes the configuration with explanatory comments. Note that this
/// will overwrite any existing file, including any user-added comments.
///
/// # Arguments
///
/// * `config` - The configuration to save
///
/// # Errors
///
/// Returns an error if:
/// - The home directory cannot be determined
/// - The project config directory cannot be created
/// - The config file cannot be written
pub fn save_project_config(config: &Config) -> Result<()> {
    let config_path = project_config_path()?;

    // Ensure the project config directory exists
    ensure_project_config_dir()?;

    // Generate config content with comments
    let content = generate_config_with_comments(config);

    fs::write(&config_path, content)?;

    Ok(())
}

/// Save configuration to a specific project's config file by name.
///
/// This writes the configuration with explanatory comments to
/// `~/.config/autom8/<project_name>/config.toml`.
///
/// # Arguments
///
/// * `project_name` - The name of the project
/// * `config` - The configuration to save
///
/// # Errors
///
/// Returns an error if:
/// - The home directory cannot be determined
/// - The project config directory cannot be created
/// - The config file cannot be written
pub fn save_project_config_for(project_name: &str, config: &Config) -> Result<()> {
    let config_path = project_config_path_for(project_name)?;

    // Ensure the project config directory exists
    let config_dir = project_config_dir_for(project_name)?;
    fs::create_dir_all(&config_dir)?;

    // Generate config content with comments
    let content = generate_config_with_comments(config);

    fs::write(&config_path, content)?;

    Ok(())
}

/// Get the effective configuration for the current project.
///
/// This function returns the resolved configuration by checking:
/// 1. If a project config exists at `~/.config/autom8/<project>/config.toml`, return it
/// 2. Otherwise, return the global config from `~/.config/autom8/config.toml`
///
/// Unlike `load_project_config()`, this function does NOT create a project config
/// if one doesn't exist. It simply returns whichever config is applicable.
///
/// **Important:** This function validates the configuration before returning it.
/// Invalid configurations will result in an error.
///
/// # Returns
///
/// The effective configuration (project config if exists, else global config).
///
/// # Errors
///
/// Returns an error if:
/// - The home directory cannot be determined
/// - The config file cannot be read
/// - The config file contains invalid TOML
/// - The configuration is invalid (e.g., pull_request=true with commit=false)
pub fn get_effective_config() -> Result<Config> {
    let project_config_path = project_config_path()?;

    let config = if project_config_path.exists() {
        // Project config exists, load it directly (no auto-creation)
        let content = fs::read_to_string(&project_config_path)?;
        toml::from_str(&content).map_err(|e| {
            Autom8Error::Config(format!(
                "Failed to parse project config file at {:?}: {}",
                project_config_path, e
            ))
        })?
    } else {
        // No project config, load global config
        load_global_config()?
    };

    // Validate the configuration before returning
    validate_config(&config).map_err(|e| Autom8Error::Config(e.to_string()))?;

    Ok(config)
}

// ============================================================================
// Directory Management
// ============================================================================

/// Subdirectory names within a project config directory
const SPEC_SUBDIR: &str = "spec";
const RUNS_SUBDIR: &str = "runs";
const SESSIONS_SUBDIR: &str = "sessions";

/// Filename for project metadata
const PROJECT_METADATA_FILENAME: &str = "project.json";

/// Project metadata stored in `~/.config/autom8/<project>/project.json`.
///
/// Contains persistent information about the project that doesn't change
/// between runs, such as the path to the git repository.
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ProjectMetadata {
    /// The absolute path to the git repository root.
    pub repo_path: PathBuf,
}

/// Get the autom8 config directory path (~/.config/autom8/).
///
/// Returns the path to the config directory. Does not create the directory.
pub fn config_dir() -> Result<PathBuf> {
    let home = dirs::home_dir()
        .ok_or_else(|| Autom8Error::Config("Could not determine home directory".to_string()))?;
    Ok(home.join(".config").join(CONFIG_DIR_NAME))
}

/// Ensure the autom8 config directory exists (~/.config/autom8/).
///
/// Creates the directory if it doesn't exist. Returns whether the directory
/// was newly created (true) or already existed (false).
pub fn ensure_config_dir() -> Result<(PathBuf, bool)> {
    let dir = config_dir()?;
    let created = !dir.exists();
    fs::create_dir_all(&dir)?;
    Ok((dir, created))
}

/// Get the current project name.
///
/// Uses the git repository name (basename of the main repo root) when in a git
/// repository, ensuring consistent project identification across all worktrees.
/// Falls back to the current working directory basename if not in a git repo.
pub fn current_project_name() -> Result<String> {
    // Try to get the git repository name first
    if let Ok(Some(repo_name)) = crate::worktree::get_git_repo_name() {
        return Ok(repo_name);
    }

    // Fallback: use CWD basename for non-git directories
    let cwd = env::current_dir().map_err(|e| {
        Autom8Error::Config(format!("Could not determine current directory: {}", e))
    })?;
    cwd.file_name()
        .and_then(|n| n.to_str())
        .map(|s| s.to_string())
        .ok_or_else(|| {
            Autom8Error::Config("Could not determine project name from path".to_string())
        })
}

/// Get the project-specific config directory path (~/.config/autom8/<project-name>/).
///
/// Returns the path to the project config directory. Does not create the directory.
pub fn project_config_dir() -> Result<PathBuf> {
    let base = config_dir()?;
    let project_name = current_project_name()?;
    Ok(base.join(project_name))
}

/// Get the project-specific config directory path for a given project name.
pub fn project_config_dir_for(project_name: &str) -> Result<PathBuf> {
    let base = config_dir()?;
    Ok(base.join(project_name))
}

/// Ensure the project-specific config directory and its subdirectories exist.
///
/// Creates:
/// - `~/.config/autom8/<project-name>/`
/// - `~/.config/autom8/<project-name>/spec/`
/// - `~/.config/autom8/<project-name>/runs/`
/// - `~/.config/autom8/<project-name>/project.json` (with repo path)
///
/// Returns the project config directory path and whether it was newly created.
pub fn ensure_project_config_dir() -> Result<(PathBuf, bool)> {
    let dir = project_config_dir()?;
    let created = !dir.exists();

    // Create all subdirectories
    fs::create_dir_all(dir.join(SPEC_SUBDIR))?;
    fs::create_dir_all(dir.join(RUNS_SUBDIR))?;

    // Save project metadata with repo path (only if it doesn't exist yet)
    let metadata_path = dir.join(PROJECT_METADATA_FILENAME);
    if !metadata_path.exists() {
        if let Ok(repo_path) = crate::worktree::get_main_repo_root() {
            let metadata = ProjectMetadata { repo_path };
            if let Ok(content) = serde_json::to_string_pretty(&metadata) {
                let _ = fs::write(&metadata_path, content);
            }
        }
    }

    Ok((dir, created))
}

/// Get the repository path for a project by name.
///
/// Reads the `project.json` file from the project's config directory
/// and returns the stored `repo_path`.
///
/// Returns `None` if the project doesn't exist or has no metadata.
pub fn get_project_repo_path(project_name: &str) -> Option<PathBuf> {
    let project_dir = project_config_dir_for(project_name).ok()?;
    let metadata_path = project_dir.join(PROJECT_METADATA_FILENAME);

    let content = fs::read_to_string(&metadata_path).ok()?;
    let metadata: ProjectMetadata = serde_json::from_str(&content).ok()?;

    // Only return if the path still exists
    if metadata.repo_path.exists() {
        Some(metadata.repo_path)
    } else {
        None
    }
}

/// Get the spec subdirectory path for the current project.
pub fn spec_dir() -> Result<PathBuf> {
    Ok(project_config_dir()?.join(SPEC_SUBDIR))
}

/// Get the runs subdirectory path for the current project.
pub fn runs_dir() -> Result<PathBuf> {
    Ok(project_config_dir()?.join(RUNS_SUBDIR))
}

/// List all project directories in the config directory.
///
/// Returns a sorted list of project names (directory basenames) from `~/.config/autom8/`.
/// Only includes directories, not files.
pub fn list_projects() -> Result<Vec<String>> {
    let base = config_dir()?;

    if !base.exists() {
        return Ok(Vec::new());
    }

    let mut projects = Vec::new();

    let entries = fs::read_dir(&base)
        .map_err(|e| Autom8Error::Config(format!("Could not read config directory: {}", e)))?;

    for entry in entries {
        let entry = entry
            .map_err(|e| Autom8Error::Config(format!("Could not read directory entry: {}", e)))?;

        let path = entry.path();
        if path.is_dir() {
            if let Some(name) = path.file_name().and_then(|n| n.to_str()) {
                projects.push(name.to_string());
            }
        }
    }

    projects.sort();
    Ok(projects)
}

/// Check if a file is already inside the autom8 config directory.
///
/// Returns true if the file path is inside `~/.config/autom8/` (any project).
/// This prevents moving files that are already in the config area, even if they're
/// in a different project's directory (e.g., a worktree-named project).
pub fn is_in_config_dir(file_path: &std::path::Path) -> Result<bool> {
    let base_config = config_dir()?;

    // Canonicalize both paths to handle relative paths and symlinks
    let canonical_file = file_path
        .canonicalize()
        .unwrap_or_else(|_| file_path.to_path_buf());
    let canonical_config = base_config.canonicalize().unwrap_or(base_config);

    Ok(canonical_file.starts_with(&canonical_config))
}

/// Result of moving a file to the config directory.
#[derive(Debug)]
pub struct MoveResult {
    /// The destination path where the file was moved.
    pub dest_path: PathBuf,
    /// Whether the file was actually moved (false if already in config dir).
    pub was_moved: bool,
}

/// Move a file to the appropriate config subdirectory if it's not already there.
///
/// Both markdown (`.md`) and JSON (`.json`) files are moved to `~/.config/autom8/<project-name>/spec/`
///
/// Uses `fs::rename()` when possible, falls back to copy+delete for cross-filesystem moves.
///
/// Returns the path to use for processing (either the original or the moved location).
pub fn move_to_config_dir(file_path: &std::path::Path) -> Result<MoveResult> {
    // If already in config directory, return original path
    if is_in_config_dir(file_path)? {
        let canonical = file_path
            .canonicalize()
            .unwrap_or_else(|_| file_path.to_path_buf());
        return Ok(MoveResult {
            dest_path: canonical,
            was_moved: false,
        });
    }

    // All files go to spec/ directory
    let dest_dir = spec_dir()?;

    // Ensure destination directory exists
    fs::create_dir_all(&dest_dir)?;

    // Get filename and create destination path
    let filename = file_path
        .file_name()
        .ok_or_else(|| Autom8Error::Config("Could not determine filename".to_string()))?;
    let dest_path = dest_dir.join(filename);

    // Try rename first (fast, atomic), fall back to copy+delete for cross-filesystem
    if fs::rename(file_path, &dest_path).is_err() {
        // Cross-filesystem move: copy then delete original
        fs::copy(file_path, &dest_path)?;
        fs::remove_file(file_path)?;
    }

    Ok(MoveResult {
        dest_path,
        was_moved: true,
    })
}

/// Status information for a single project.
#[derive(Debug, Clone)]
pub struct ProjectStatus {
    /// The project name (directory basename).
    pub name: String,
    /// Whether there is an active or failed run.
    pub has_active_run: bool,
    /// The run status (if any run exists).
    pub run_status: Option<crate::state::RunStatus>,
    /// Count of incomplete specs.
    pub incomplete_spec_count: usize,
    /// Total spec count.
    pub total_spec_count: usize,
}

impl ProjectStatus {
    /// Returns true if this project needs attention (active/failed run or incomplete specs).
    pub fn needs_attention(&self) -> bool {
        self.has_active_run
            || self.run_status == Some(crate::state::RunStatus::Failed)
            || self.incomplete_spec_count > 0
    }

    /// Returns true if this project is idle (no active work).
    pub fn is_idle(&self) -> bool {
        !self.needs_attention()
    }
}

/// Information about a project's directory contents for tree display.
#[derive(Debug, Clone)]
pub struct ProjectTreeInfo {
    /// The project name (directory basename).
    pub name: String,
    /// Whether there is an active run.
    pub has_active_run: bool,
    /// The run status (if any run exists).
    pub run_status: Option<crate::state::RunStatus>,
    /// Number of spec files in spec/ directory.
    pub spec_count: usize,
    /// Number of incomplete specs.
    pub incomplete_spec_count: usize,
    /// Number of markdown spec files in spec/ directory.
    pub spec_md_count: usize,
    /// Number of archived runs in runs/ directory.
    pub runs_count: usize,
    /// The date of the most recent run (archived or current).
    pub last_run_date: Option<chrono::DateTime<chrono::Utc>>,
}

impl ProjectTreeInfo {
    /// Returns a status label for the project.
    pub fn status_label(&self) -> &'static str {
        if self.has_active_run {
            "running"
        } else if self.run_status == Some(crate::state::RunStatus::Failed) {
            "failed"
        } else if self.incomplete_spec_count > 0 {
            "incomplete"
        } else if self.spec_count > 0 {
            "complete"
        } else {
            "empty"
        }
    }

    /// Returns true if this project has any content.
    pub fn has_content(&self) -> bool {
        self.spec_count > 0 || self.spec_md_count > 0 || self.runs_count > 0 || self.has_active_run
    }
}

/// Get detailed tree information for all projects.
///
/// Returns a list of `ProjectTreeInfo` for each project in `~/.config/autom8/`.
/// Projects are sorted alphabetically by name.
pub fn list_projects_tree() -> Result<Vec<ProjectTreeInfo>> {
    use crate::spec::Spec;
    use crate::state::{RunState, RunStatus, SessionMetadata};

    let projects = list_projects()?;
    let mut tree_info = Vec::new();

    for project_name in projects {
        let project_dir = project_config_dir_for(&project_name)?;

        // Check for active run by scanning all session metadata files directly
        // This avoids spawning git subprocess that StateManager::for_project() does
        let sessions_dir = project_dir.join(SESSIONS_SUBDIR);
        let mut has_active_run = false;
        let mut run_status: Option<RunStatus> = None;
        let mut active_run_started_at: Option<chrono::DateTime<chrono::Utc>> = None;

        if sessions_dir.exists() {
            if let Ok(entries) = fs::read_dir(&sessions_dir) {
                for entry in entries.filter_map(|e| e.ok()) {
                    let session_path = entry.path();
                    if !session_path.is_dir() {
                        continue;
                    }

                    // Check metadata.json for is_running flag
                    let metadata_path = session_path.join("metadata.json");
                    if let Ok(content) = fs::read_to_string(&metadata_path) {
                        if let Ok(metadata) = serde_json::from_str::<SessionMetadata>(&content) {
                            if metadata.is_running {
                                // Also load state.json to get the RunStatus
                                let state_path = session_path.join("state.json");
                                if let Ok(state_content) = fs::read_to_string(&state_path) {
                                    if let Ok(state) =
                                        serde_json::from_str::<RunState>(&state_content)
                                    {
                                        if state.status == RunStatus::Running {
                                            has_active_run = true;
                                            run_status = Some(state.status);
                                            active_run_started_at = Some(state.started_at);
                                            break;
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }

        // Count specs and incomplete specs by reading spec directory directly
        let spec_dir = project_dir.join(SPEC_SUBDIR);
        let mut specs: Vec<PathBuf> = Vec::new();
        let mut incomplete_count = 0;

        if spec_dir.exists() {
            if let Ok(entries) = fs::read_dir(&spec_dir) {
                for entry in entries.filter_map(|e| e.ok()) {
                    let path = entry.path();
                    if path.extension().is_some_and(|e| e == "json") {
                        specs.push(path.clone());
                        if let Ok(spec) = Spec::load(&path) {
                            if spec.is_incomplete() {
                                incomplete_count += 1;
                            }
                        }
                    }
                }
            }
        }

        // Count spec files (markdown specs)
        let spec_md_count = if spec_dir.exists() {
            fs::read_dir(&spec_dir)
                .map(|entries| {
                    entries
                        .filter_map(|e| e.ok())
                        .filter(|e| {
                            e.path().is_file()
                                && e.path().extension().is_some_and(|ext| ext == "md")
                        })
                        .count()
                })
                .unwrap_or(0)
        } else {
            0
        };

        // Get archived runs by reading runs directory directly
        let runs_dir = project_dir.join(RUNS_SUBDIR);
        let mut archived_runs: Vec<RunState> = Vec::new();

        if runs_dir.exists() {
            if let Ok(entries) = fs::read_dir(&runs_dir) {
                for entry in entries.filter_map(|e| e.ok()) {
                    let path = entry.path();
                    if path.extension().is_some_and(|e| e == "json") {
                        if let Ok(content) = fs::read_to_string(&path) {
                            if let Ok(state) = serde_json::from_str::<RunState>(&content) {
                                archived_runs.push(state);
                            }
                        }
                    }
                }
            }
        }
        // Sort by start date, newest first
        archived_runs.sort_by(|a, b| b.started_at.cmp(&a.started_at));
        let runs_count = archived_runs.len();

        // Determine last run date from archived runs or current run.
        // For active runs: use started_at (shows how long it's been running).
        // For completed runs: use finished_at (shows when it finished), falling back to started_at.
        let last_run_date = if has_active_run {
            // Active run: show when it started
            active_run_started_at
        } else {
            // No active run: fall back to most recent archived run
            archived_runs
                .first()
                .and_then(|r| r.finished_at.or(Some(r.started_at)))
        };

        tree_info.push(ProjectTreeInfo {
            name: project_name,
            has_active_run,
            run_status,
            spec_count: specs.len(),
            incomplete_spec_count: incomplete_count,
            spec_md_count,
            runs_count,
            last_run_date,
        });
    }

    Ok(tree_info)
}

/// Detailed information about a project for the describe command.
#[derive(Debug, Clone)]
pub struct ProjectDescription {
    /// The project name.
    pub name: String,
    /// Path to the project config directory.
    pub path: PathBuf,
    /// Whether there is an active run.
    pub has_active_run: bool,
    /// The run status (if any run exists).
    pub run_status: Option<crate::state::RunStatus>,
    /// Current story being worked on (if any).
    pub current_story: Option<String>,
    /// Current branch from state (if any).
    pub current_branch: Option<String>,
    /// List of specs with their details.
    pub specs: Vec<SpecSummary>,
    /// Number of markdown spec files.
    pub spec_md_count: usize,
    /// Number of archived runs.
    pub runs_count: usize,
}

/// Summary of a single spec.
#[derive(Debug, Clone)]
pub struct SpecSummary {
    /// The spec filename.
    pub filename: String,
    /// Full path to the spec file.
    pub path: PathBuf,
    /// Project name from the spec.
    pub project_name: String,
    /// Branch name from the spec.
    pub branch_name: String,
    /// Description from the spec.
    pub description: String,
    /// All user stories with their status.
    pub stories: Vec<StorySummary>,
    /// Number of completed stories.
    pub completed_count: usize,
    /// Total number of stories.
    pub total_count: usize,
    /// Whether this spec is currently being executed (has an active run).
    pub is_active: bool,
}

/// Summary of a user story.
#[derive(Debug, Clone)]
pub struct StorySummary {
    /// Story ID (e.g., "US-001").
    pub id: String,
    /// Story title.
    pub title: String,
    /// Whether the story passes.
    pub passes: bool,
}

/// Check if a project exists in the config directory.
pub fn project_exists(project_name: &str) -> Result<bool> {
    let project_dir = project_config_dir_for(project_name)?;
    Ok(project_dir.exists())
}

/// Get detailed description of a project.
///
/// Returns `None` if the project doesn't exist.
pub fn get_project_description(project_name: &str) -> Result<Option<ProjectDescription>> {
    use crate::spec::Spec;
    use crate::state::StateManager;

    let project_dir = project_config_dir_for(project_name)?;

    if !project_dir.exists() {
        return Ok(None);
    }

    let sm = StateManager::for_project(project_name)?;

    // Check for active run
    let run_state = sm.load_current().ok().flatten();
    let has_active_run = run_state
        .as_ref()
        .map(|s| s.status == crate::state::RunStatus::Running)
        .unwrap_or(false);
    let run_status = run_state.as_ref().map(|s| s.status);
    let current_story = run_state.as_ref().and_then(|s| s.current_story.clone());
    let current_branch = run_state.map(|s| s.branch);

    // Load specs with details
    let spec_paths = sm.list_specs().unwrap_or_default();
    let mut specs = Vec::new();

    for spec_path in spec_paths {
        if let Ok(spec) = Spec::load(&spec_path) {
            let stories: Vec<StorySummary> = spec
                .user_stories
                .iter()
                .map(|s| StorySummary {
                    id: s.id.clone(),
                    title: s.title.clone(),
                    passes: s.passes,
                })
                .collect();

            let completed_count = stories.iter().filter(|s| s.passes).count();
            let total_count = stories.len();

            let filename = spec_path
                .file_name()
                .and_then(|n| n.to_str())
                .unwrap_or("unknown")
                .to_string();

            // A spec is active if there's an active run and the spec's branch matches the current branch
            let is_active = has_active_run
                && current_branch
                    .as_ref()
                    .is_some_and(|b| b == &spec.branch_name);

            specs.push(SpecSummary {
                filename,
                path: spec_path,
                project_name: spec.project,
                branch_name: spec.branch_name.clone(),
                description: spec.description,
                stories,
                completed_count,
                total_count,
                is_active,
            });
        }
    }

    // Count spec files (markdown specs)
    let spec_dir = project_dir.join(SPEC_SUBDIR);
    let spec_md_count = if spec_dir.exists() {
        fs::read_dir(&spec_dir)
            .map(|entries| {
                entries
                    .filter_map(|e| e.ok())
                    .filter(|e| {
                        e.path().is_file() && e.path().extension().is_some_and(|ext| ext == "md")
                    })
                    .count()
            })
            .unwrap_or(0)
    } else {
        0
    };

    // Count archived runs
    let runs_count = sm.list_archived().unwrap_or_default().len();

    Ok(Some(ProjectDescription {
        name: project_name.to_string(),
        path: project_dir,
        has_active_run,
        run_status,
        current_story,
        current_branch,
        specs,
        spec_md_count,
        runs_count,
    }))
}

/// Get status for all projects across the config directory.
///
/// Returns a list of `ProjectStatus` for each project in `~/.config/autom8/`.
/// Projects are sorted alphabetically by name.
pub fn global_status() -> Result<Vec<ProjectStatus>> {
    use crate::spec::Spec;
    use crate::state::StateManager;

    let projects = list_projects()?;
    let mut statuses = Vec::new();

    for project_name in projects {
        let sm = StateManager::for_project(&project_name)?;

        // Check for active run
        let run_state = sm.load_current().ok().flatten();
        let has_active_run = run_state
            .as_ref()
            .map(|s| s.status == crate::state::RunStatus::Running)
            .unwrap_or(false);
        let run_status = run_state.map(|s| s.status);

        // Count incomplete specs
        let specs = sm.list_specs().unwrap_or_default();
        let mut incomplete_count = 0;
        let mut total_count = 0;

        for spec_path in &specs {
            if let Ok(spec) = Spec::load(spec_path) {
                total_count += 1;
                if spec.is_incomplete() {
                    incomplete_count += 1;
                }
            }
        }

        statuses.push(ProjectStatus {
            name: project_name,
            has_active_run,
            run_status,
            incomplete_spec_count: incomplete_count,
            total_spec_count: total_count,
        });
    }

    Ok(statuses)
}

/// Get status for all projects at a given config directory (for testing).
#[cfg(test)]
fn global_status_at(base_config_dir: &std::path::Path) -> Result<Vec<ProjectStatus>> {
    use crate::spec::Spec;
    use crate::state::StateManager;

    let projects = list_projects_at(base_config_dir)?;
    let mut statuses = Vec::new();

    for project_name in projects {
        let project_dir = base_config_dir.join(&project_name);
        let sm = StateManager::with_dir(project_dir);

        // Check for active run
        let run_state = sm.load_current().ok().flatten();
        let has_active_run = run_state
            .as_ref()
            .map(|s| s.status == crate::state::RunStatus::Running)
            .unwrap_or(false);
        let run_status = run_state.map(|s| s.status);

        // Count incomplete specs
        let specs = sm.list_specs().unwrap_or_default();
        let mut incomplete_count = 0;
        let mut total_count = 0;

        for spec_path in &specs {
            if let Ok(spec) = Spec::load(spec_path) {
                total_count += 1;
                if spec.is_incomplete() {
                    incomplete_count += 1;
                }
            }
        }

        statuses.push(ProjectStatus {
            name: project_name,
            has_active_run,
            run_status,
            incomplete_spec_count: incomplete_count,
            total_spec_count: total_count,
        });
    }

    Ok(statuses)
}

/// List all project directories at a given base config path.
///
/// This is a testable version that allows specifying a custom base path.
/// Returns a sorted list of project names (directory basenames).
#[cfg(test)]
fn list_projects_at(base_config_dir: &std::path::Path) -> Result<Vec<String>> {
    if !base_config_dir.exists() {
        return Ok(Vec::new());
    }

    let mut projects = Vec::new();

    let entries = fs::read_dir(base_config_dir)
        .map_err(|e| Autom8Error::Config(format!("Could not read config directory: {}", e)))?;

    for entry in entries {
        let entry = entry
            .map_err(|e| Autom8Error::Config(format!("Could not read directory entry: {}", e)))?;

        let path = entry.path();
        if path.is_dir() {
            if let Some(name) = path.file_name().and_then(|n| n.to_str()) {
                projects.push(name.to_string());
            }
        }
    }

    projects.sort();
    Ok(projects)
}

/// Ensure a config directory exists at the given base path.
///
/// This is a testable version that allows specifying a custom base path.
/// Creates `<base>/.config/autom8/` if it doesn't exist.
///
/// Returns the full path and whether the directory was newly created.
#[cfg(test)]
fn ensure_config_dir_at(base: &std::path::Path) -> Result<(PathBuf, bool)> {
    let dir = base.join(".config").join(CONFIG_DIR_NAME);
    let created = !dir.exists();
    fs::create_dir_all(&dir)?;
    Ok((dir, created))
}

/// Ensure a project config directory with subdirectories exists at the given base path.
///
/// This is a testable version that allows specifying a custom base path and project name.
/// Creates:
/// - `<base>/.config/autom8/<project-name>/`
/// - `<base>/.config/autom8/<project-name>/spec/`
/// - `<base>/.config/autom8/<project-name>/runs/`
///
/// Returns the full project path and whether it was newly created.
#[cfg(test)]
fn ensure_project_config_dir_at(
    base: &std::path::Path,
    project_name: &str,
) -> Result<(PathBuf, bool)> {
    let dir = base
        .join(".config")
        .join(CONFIG_DIR_NAME)
        .join(project_name);
    let created = !dir.exists();

    fs::create_dir_all(dir.join(SPEC_SUBDIR))?;
    fs::create_dir_all(dir.join(RUNS_SUBDIR))?;

    Ok((dir, created))
}

/// Get the spec subdirectory path for a given project config directory.
///
/// This is a testable version that allows specifying a custom project config directory path.
/// Unlike the real `spec_dir()`, this doesn't perform filesystem operations or require
/// the directory to exist.
#[cfg(test)]
fn spec_dir_at(project_config_dir: &std::path::Path) -> PathBuf {
    project_config_dir.join(SPEC_SUBDIR)
}

/// Check if a file path is within a given config directory.
///
/// This is a testable version of `is_in_config_dir` that allows specifying a custom
/// base config directory path instead of using the real `~/.config/autom8` directory.
/// Handles path canonicalization like the original function.
#[cfg(test)]
fn is_in_config_dir_at(
    base_config_dir: &std::path::Path,
    file_path: &std::path::Path,
) -> Result<bool> {
    // Canonicalize both paths to handle relative paths and symlinks
    let canonical_file = file_path
        .canonicalize()
        .unwrap_or_else(|_| file_path.to_path_buf());
    let canonical_config = base_config_dir
        .canonicalize()
        .unwrap_or_else(|_| base_config_dir.to_path_buf());

    Ok(canonical_file.starts_with(&canonical_config))
}

/// Move a file to a specified spec directory if it's not already there.
///
/// This is a testable version of `move_to_config_dir` that allows specifying a custom
/// destination spec directory instead of using the real `~/.config/autom8/<project>/spec/` directory.
///
/// Uses `fs::rename()` when possible, falls back to copy+delete for cross-filesystem moves.
///
/// Returns `MoveResult` with the destination path and whether the file was moved.
#[cfg(test)]
fn move_to_config_dir_at(
    dest_spec_dir: &std::path::Path,
    file_path: &std::path::Path,
) -> Result<MoveResult> {
    // If already in the destination spec directory, return original path
    if is_in_config_dir_at(dest_spec_dir, file_path)? {
        let canonical = file_path
            .canonicalize()
            .unwrap_or_else(|_| file_path.to_path_buf());
        return Ok(MoveResult {
            dest_path: canonical,
            was_moved: false,
        });
    }

    // Ensure destination directory exists
    fs::create_dir_all(dest_spec_dir)?;

    // Get filename and create destination path
    let filename = file_path
        .file_name()
        .ok_or_else(|| Autom8Error::Config("Could not determine filename".to_string()))?;
    let dest_path = dest_spec_dir.join(filename);

    // Try rename first (fast, atomic), fall back to copy+delete for cross-filesystem
    if fs::rename(file_path, &dest_path).is_err() {
        // Cross-filesystem move: copy then delete original
        fs::copy(file_path, &dest_path)?;
        fs::remove_file(file_path)?;
    }

    Ok(MoveResult {
        dest_path,
        was_moved: true,
    })
}

#[cfg(test)]
mod tests {
    use super::*;
    use tempfile::TempDir;

    #[test]
    fn test_ensure_config_dir_at_creates_directory() {
        let temp_dir = TempDir::new().unwrap();
        let expected_path = temp_dir.path().join(".config").join("autom8");
        assert!(!expected_path.exists());

        let (path, created) = ensure_config_dir_at(temp_dir.path()).unwrap();

        assert_eq!(path, expected_path);
        assert!(created);
        assert!(expected_path.exists());
        assert!(expected_path.is_dir());
    }

    #[test]
    fn test_ensure_config_dir_at_reports_existing_directory() {
        let temp_dir = TempDir::new().unwrap();
        let expected_path = temp_dir.path().join(".config").join("autom8");

        // Create the directory first
        fs::create_dir_all(&expected_path).unwrap();
        assert!(expected_path.exists());

        let (path, created) = ensure_config_dir_at(temp_dir.path()).unwrap();

        assert_eq!(path, expected_path);
        assert!(!created); // Directory already existed
        assert!(expected_path.exists());
    }

    #[test]
    fn test_ensure_config_dir_at_creates_parent_directories() {
        let temp_dir = TempDir::new().unwrap();

        // Neither .config nor .config/autom8 should exist initially
        let config_path = temp_dir.path().join(".config");
        assert!(!config_path.exists());

        let (path, created) = ensure_config_dir_at(temp_dir.path()).unwrap();

        assert!(created);
        assert!(path.exists());
        assert!(config_path.exists()); // Parent was also created
    }

    #[test]
    fn test_spec_dir_at_returns_spec_subdirectory() {
        let project_config_dir = PathBuf::from("/some/project/config/dir");
        let result = spec_dir_at(&project_config_dir);
        assert_eq!(result, PathBuf::from("/some/project/config/dir/spec"));
    }

    #[test]
    fn test_spec_dir_at_with_temp_dir() {
        let temp_dir = TempDir::new().unwrap();
        let (project_dir, _) =
            ensure_project_config_dir_at(temp_dir.path(), "test-project").unwrap();

        let spec_dir = spec_dir_at(&project_dir);

        // Verify it points to the spec subdirectory
        assert_eq!(spec_dir, project_dir.join("spec"));
        // Since ensure_project_config_dir_at creates the spec dir, it should exist
        assert!(spec_dir.exists());
        assert!(spec_dir.is_dir());
    }

    #[test]
    fn test_is_in_config_dir_at_returns_true_for_file_inside_config() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join("config");
        fs::create_dir_all(&config_dir).unwrap();

        let file_inside = config_dir.join("subdir").join("file.txt");
        fs::create_dir_all(file_inside.parent().unwrap()).unwrap();
        fs::write(&file_inside, "test").unwrap();

        let result = is_in_config_dir_at(&config_dir, &file_inside).unwrap();
        assert!(result);
    }

    #[test]
    fn test_is_in_config_dir_at_returns_false_for_file_outside_config() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join("config");
        let other_dir = temp_dir.path().join("other");
        fs::create_dir_all(&config_dir).unwrap();
        fs::create_dir_all(&other_dir).unwrap();

        let file_outside = other_dir.join("file.txt");
        fs::write(&file_outside, "test").unwrap();

        let result = is_in_config_dir_at(&config_dir, &file_outside).unwrap();
        assert!(!result);
    }

    #[test]
    fn test_is_in_config_dir_at_handles_nonexistent_path() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join("config");
        fs::create_dir_all(&config_dir).unwrap();

        // Use canonicalized config_dir to construct path - mimics real usage
        // where paths are typically derived from the config dir itself
        let canonical_config = config_dir.canonicalize().unwrap();
        let nonexistent_file = canonical_config.join("does_not_exist.txt");

        // Should return true because the path starts with canonicalized config_dir
        let result = is_in_config_dir_at(&config_dir, &nonexistent_file).unwrap();
        assert!(result);
    }

    #[test]
    fn test_move_to_config_dir_at_moves_file_to_dest_dir() {
        let temp_dir = TempDir::new().unwrap();
        let source_dir = temp_dir.path().join("source");
        let dest_spec_dir = temp_dir.path().join("dest_config").join("spec");
        fs::create_dir_all(&source_dir).unwrap();

        let source_file = source_dir.join("test-file.json");
        let content = r#"{"test": "data"}"#;
        fs::write(&source_file, content).unwrap();

        let result = move_to_config_dir_at(&dest_spec_dir, &source_file).unwrap();

        assert!(result.was_moved, "File should have been moved");
        assert!(result.dest_path.exists(), "Destination file should exist");
        assert!(
            !source_file.exists(),
            "Source file should be deleted after move"
        );
        assert!(
            result.dest_path.starts_with(&dest_spec_dir),
            "File should be in the specified dest_spec_dir"
        );
        assert_eq!(
            fs::read_to_string(&result.dest_path).unwrap(),
            content,
            "Content should match"
        );
    }

    #[test]
    fn test_move_to_config_dir_at_returns_unchanged_if_already_in_dest() {
        let temp_dir = TempDir::new().unwrap();
        let dest_spec_dir = temp_dir.path().join("config").join("spec");
        fs::create_dir_all(&dest_spec_dir).unwrap();

        let existing_file = dest_spec_dir.join("already-here.md");
        fs::write(&existing_file, "# Already here").unwrap();

        let result = move_to_config_dir_at(&dest_spec_dir, &existing_file).unwrap();

        assert!(!result.was_moved, "File should not have been moved");
        assert!(
            existing_file.exists(),
            "File should still exist in original location"
        );
        assert_eq!(
            result.dest_path.canonicalize().unwrap(),
            existing_file.canonicalize().unwrap(),
            "Path should be the canonical original"
        );
    }

    #[test]
    fn test_move_to_config_dir_at_preserves_filename() {
        let temp_dir = TempDir::new().unwrap();
        let source_dir = temp_dir.path().join("source");
        let dest_spec_dir = temp_dir.path().join("config").join("spec");
        fs::create_dir_all(&source_dir).unwrap();

        let source_file = source_dir.join("my-custom-filename.txt");
        fs::write(&source_file, "test content").unwrap();

        let result = move_to_config_dir_at(&dest_spec_dir, &source_file).unwrap();

        assert_eq!(
            result.dest_path.file_name().unwrap().to_str().unwrap(),
            "my-custom-filename.txt",
            "Filename should be preserved"
        );
    }

    #[test]
    fn test_move_to_config_dir_at_creates_dest_dir_if_missing() {
        let temp_dir = TempDir::new().unwrap();
        let source_dir = temp_dir.path().join("source");
        let dest_spec_dir = temp_dir
            .path()
            .join("nonexistent")
            .join("nested")
            .join("spec");
        fs::create_dir_all(&source_dir).unwrap();
        // Note: dest_spec_dir does not exist yet

        let source_file = source_dir.join("test.md");
        fs::write(&source_file, "# Test").unwrap();

        let result = move_to_config_dir_at(&dest_spec_dir, &source_file).unwrap();

        assert!(result.was_moved, "File should have been moved");
        assert!(
            dest_spec_dir.exists(),
            "Destination directory should be created"
        );
        assert!(result.dest_path.exists(), "Destination file should exist");
    }

    #[test]
    fn test_ensure_project_config_dir_at_creates_all_subdirs() {
        let temp_dir = TempDir::new().unwrap();
        let project_name = "test-project";

        let (path, created) = ensure_project_config_dir_at(temp_dir.path(), project_name).unwrap();

        assert!(created);
        assert!(path.exists());
        assert!(path.ends_with(project_name));

        // Verify all subdirectories were created
        assert!(path.join("spec").exists());
        assert!(path.join("spec").is_dir());
        assert!(path.join("runs").exists());
        assert!(path.join("runs").is_dir());
    }

    #[test]
    fn test_ensure_project_config_dir_at_reports_existing() {
        let temp_dir = TempDir::new().unwrap();
        let project_name = "existing-project";

        // Create the directory first
        let (path1, created1) =
            ensure_project_config_dir_at(temp_dir.path(), project_name).unwrap();
        assert!(created1);

        // Call again - should report as existing
        let (path2, created2) =
            ensure_project_config_dir_at(temp_dir.path(), project_name).unwrap();
        assert!(!created2);
        assert_eq!(path1, path2);
    }

    #[test]
    fn test_ensure_project_config_dir_at_different_projects_share_nothing() {
        let temp_dir = TempDir::new().unwrap();

        let (path1, _) = ensure_project_config_dir_at(temp_dir.path(), "project-a").unwrap();
        let (path2, _) = ensure_project_config_dir_at(temp_dir.path(), "project-b").unwrap();

        // Each project has its own directory
        assert_ne!(path1, path2);
        assert!(path1.exists());
        assert!(path2.exists());

        // Each has its own subdirs
        assert!(path1.join("spec").exists());
        assert!(path2.join("spec").exists());
    }

    #[test]
    fn test_ensure_project_config_dir_creates_directory_structure() {
        // Use TempDir for isolation - does not touch ~/.config/autom8/
        let temp_dir = TempDir::new().unwrap();

        let result = ensure_project_config_dir_at(temp_dir.path(), "test-project");
        assert!(result.is_ok());
        let (path, created) = result.unwrap();

        // Verify the directory was created
        assert!(created);

        // Verify structure
        assert!(path.exists());
        assert!(path.join("spec").exists());
        assert!(path.join("runs").exists());
    }

    #[test]
    fn test_is_in_config_dir_true_for_file_in_config() {
        // Create a file inside a temp config directory
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join("config");
        fs::create_dir_all(&config_dir).unwrap();
        let test_file = config_dir.join("test.json");
        fs::write(&test_file, "{}").unwrap();

        let result = is_in_config_dir_at(&config_dir, &test_file).unwrap();
        assert!(result, "File in config dir should return true");
    }

    #[test]
    fn test_is_in_config_dir_false_for_file_outside_config() {
        let temp_dir = TempDir::new().unwrap();
        let test_file = temp_dir.path().join("test.json");
        fs::write(&test_file, "{}").unwrap();

        let result = is_in_config_dir(&test_file).unwrap();
        assert!(!result, "File outside config dir should return false");
    }

    #[test]
    fn test_is_in_config_dir_true_for_file_in_subdirectory() {
        // Create a file in a subdirectory of config
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join("config");
        let spec_dir = config_dir.join("spec");
        fs::create_dir_all(&spec_dir).unwrap();
        let test_file = spec_dir.join("test.md");
        fs::write(&test_file, "# Test").unwrap();

        let result = is_in_config_dir_at(&config_dir, &test_file).unwrap();
        assert!(result, "File in config subdirectory should return true");
    }

    #[test]
    fn test_is_in_config_dir_true_for_file_in_different_project() {
        // Create a file in a different project's directory within the config area
        // This simulates a file in a worktree-named project directory
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join("config");
        let other_project_spec_dir = config_dir
            .join("some-other-project-wt-feature")
            .join("spec");
        fs::create_dir_all(&other_project_spec_dir).unwrap();
        let test_file = other_project_spec_dir.join("test.md");
        fs::write(&test_file, "# Test").unwrap();

        let result = is_in_config_dir_at(&config_dir, &test_file).unwrap();
        assert!(
            result,
            "File in different project's config dir should return true"
        );
    }

    #[test]
    fn test_move_to_config_dir_moves_md_to_spec() {
        let temp_dir = TempDir::new().unwrap();
        let source_dir = temp_dir.path().join("source");
        let dest_spec_dir = temp_dir.path().join("config").join("spec");
        fs::create_dir_all(&source_dir).unwrap();

        let source_file = source_dir.join("test-spec.md");
        let content = "# Test Spec\n\nThis is a test.";
        fs::write(&source_file, content).unwrap();

        let result = move_to_config_dir_at(&dest_spec_dir, &source_file).unwrap();

        assert!(result.was_moved, "File should have been moved");
        assert!(result.dest_path.exists(), "Destination file should exist");
        assert!(
            !source_file.exists(),
            "Source file should be deleted after move"
        );
        assert!(
            result.dest_path.parent().unwrap().ends_with("spec"),
            "MD files should go to spec/ directory"
        );
        assert_eq!(
            fs::read_to_string(&result.dest_path).unwrap(),
            content,
            "Content should match"
        );
        // No cleanup needed - TempDir handles it
    }

    #[test]
    fn test_move_to_config_dir_no_move_if_already_in_config() {
        // Create a file already in the destination spec directory
        let temp_dir = TempDir::new().unwrap();
        let dest_spec_dir = temp_dir.path().join("config").join("spec");
        fs::create_dir_all(&dest_spec_dir).unwrap();

        let existing_file = dest_spec_dir.join("existing-test.md");
        fs::write(&existing_file, "# Already here").unwrap();

        let result = move_to_config_dir_at(&dest_spec_dir, &existing_file).unwrap();

        assert!(!result.was_moved, "File should not have been moved");
        assert!(
            existing_file.exists(),
            "File should still exist in original location"
        );
        assert_eq!(
            result.dest_path.canonicalize().unwrap(),
            existing_file.canonicalize().unwrap(),
            "Path should be the original"
        );
        // No cleanup needed - TempDir handles it
    }

    #[test]
    fn test_move_to_config_dir_unknown_extension_goes_to_spec() {
        let temp_dir = TempDir::new().unwrap();
        let source_dir = temp_dir.path().join("source");
        let dest_spec_dir = temp_dir.path().join("config").join("spec");
        fs::create_dir_all(&source_dir).unwrap();

        let source_file = source_dir.join("test-file.txt");
        fs::write(&source_file, "Some content").unwrap();

        let result = move_to_config_dir_at(&dest_spec_dir, &source_file).unwrap();

        assert!(result.was_moved, "File should have been moved");
        assert!(
            !source_file.exists(),
            "Source file should be deleted after move"
        );
        assert!(
            result.dest_path.parent().unwrap().ends_with("spec"),
            "Unknown extensions should default to spec/ directory"
        );
        // No cleanup needed - TempDir handles it
    }

    #[test]
    fn test_move_result_struct() {
        // Verify MoveResult fields work correctly
        let result = MoveResult {
            dest_path: PathBuf::from("/test/path"),
            was_moved: true,
        };
        assert_eq!(result.dest_path, PathBuf::from("/test/path"));
        assert!(result.was_moved);
    }

    #[test]
    fn test_list_projects_empty_when_no_projects() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        let projects = list_projects_at(&config_dir).unwrap();
        assert!(
            projects.is_empty(),
            "Should return empty list when no projects exist"
        );
    }

    #[test]
    fn test_list_projects_returns_sorted_list() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");

        // Create projects in non-alphabetical order
        fs::create_dir_all(config_dir.join("zebra")).unwrap();
        fs::create_dir_all(config_dir.join("alpha")).unwrap();
        fs::create_dir_all(config_dir.join("mango")).unwrap();

        let projects = list_projects_at(&config_dir).unwrap();

        assert_eq!(projects.len(), 3);
        assert_eq!(projects[0], "alpha", "First project should be 'alpha'");
        assert_eq!(projects[1], "mango", "Second project should be 'mango'");
        assert_eq!(projects[2], "zebra", "Third project should be 'zebra'");
    }

    #[test]
    fn test_list_projects_ignores_files() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        // Create a project directory and a file
        fs::create_dir_all(config_dir.join("my-project")).unwrap();
        fs::write(config_dir.join("some-file.txt"), "not a project").unwrap();

        let projects = list_projects_at(&config_dir).unwrap();

        assert_eq!(projects.len(), 1, "Should only include directories");
        assert_eq!(projects[0], "my-project");
    }

    #[test]
    fn test_list_projects_empty_when_dir_does_not_exist() {
        let temp_dir = TempDir::new().unwrap();
        let non_existent_dir = temp_dir.path().join("does-not-exist");

        let projects = list_projects_at(&non_existent_dir).unwrap();
        assert!(
            projects.is_empty(),
            "Should return empty list for non-existent directory"
        );
    }

    // ========================================================================
    // US-010: Global status tests
    // ========================================================================

    #[test]
    fn test_project_status_needs_attention_with_active_run() {
        let status = ProjectStatus {
            name: "test-project".to_string(),
            has_active_run: true,
            run_status: Some(crate::state::RunStatus::Running),
            incomplete_spec_count: 0,
            total_spec_count: 0,
        };
        assert!(status.needs_attention(), "Active run should need attention");
        assert!(!status.is_idle());
    }

    #[test]
    fn test_project_status_needs_attention_with_failed_run() {
        let status = ProjectStatus {
            name: "test-project".to_string(),
            has_active_run: false,
            run_status: Some(crate::state::RunStatus::Failed),
            incomplete_spec_count: 0,
            total_spec_count: 0,
        };
        assert!(status.needs_attention(), "Failed run should need attention");
        assert!(!status.is_idle());
    }

    #[test]
    fn test_project_status_needs_attention_with_incomplete_specs() {
        let status = ProjectStatus {
            name: "test-project".to_string(),
            has_active_run: false,
            run_status: None,
            incomplete_spec_count: 2,
            total_spec_count: 3,
        };
        assert!(
            status.needs_attention(),
            "Incomplete specs should need attention"
        );
        assert!(!status.is_idle());
    }

    #[test]
    fn test_project_status_idle_when_no_work() {
        let status = ProjectStatus {
            name: "test-project".to_string(),
            has_active_run: false,
            run_status: Some(crate::state::RunStatus::Completed),
            incomplete_spec_count: 0,
            total_spec_count: 1,
        };
        assert!(
            !status.needs_attention(),
            "Completed project should not need attention"
        );
        assert!(status.is_idle());
    }

    #[test]
    fn test_project_status_idle_when_no_runs_no_specs() {
        let status = ProjectStatus {
            name: "test-project".to_string(),
            has_active_run: false,
            run_status: None,
            incomplete_spec_count: 0,
            total_spec_count: 0,
        };
        assert!(!status.needs_attention());
        assert!(status.is_idle());
    }

    #[test]
    fn test_global_status_empty_when_no_projects() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        let statuses = global_status_at(&config_dir).unwrap();
        assert!(
            statuses.is_empty(),
            "Should return empty list when no projects exist"
        );
    }

    #[test]
    fn test_global_status_returns_all_projects() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");

        // Create project directories with spec subdirs
        fs::create_dir_all(config_dir.join("project-a").join("spec")).unwrap();
        fs::create_dir_all(config_dir.join("project-b").join("spec")).unwrap();

        let statuses = global_status_at(&config_dir).unwrap();

        assert_eq!(statuses.len(), 2);
        assert_eq!(statuses[0].name, "project-a");
        assert_eq!(statuses[1].name, "project-b");
    }

    #[test]
    fn test_global_status_detects_active_run() {
        use crate::state::{RunState, StateManager};

        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        let project_dir = config_dir.join("active-project");
        fs::create_dir_all(project_dir.join("spec")).unwrap();

        // Create an active run
        let sm = StateManager::with_dir(project_dir);
        let run_state = RunState::new(PathBuf::from("test.json"), "test-branch".to_string());
        sm.save(&run_state).unwrap();

        let statuses = global_status_at(&config_dir).unwrap();

        assert_eq!(statuses.len(), 1);
        assert!(statuses[0].has_active_run);
        assert_eq!(
            statuses[0].run_status,
            Some(crate::state::RunStatus::Running)
        );
    }

    #[test]
    fn test_global_status_counts_incomplete_specs() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        let project_dir = config_dir.join("spec-project");
        let spec_dir = project_dir.join("spec");
        fs::create_dir_all(&spec_dir).unwrap();

        // Create an incomplete PRD
        let incomplete_prd = r#"{
            "project": "Test Project",
            "branchName": "test",
            "description": "Test",
            "userStories": [
                {"id": "US-001", "title": "Story 1", "description": "Desc", "acceptanceCriteria": [], "priority": 1, "passes": false}
            ]
        }"#;
        fs::write(spec_dir.join("spec-test.json"), incomplete_prd).unwrap();

        // Create a complete PRD
        let complete_prd = r#"{
            "project": "Complete Project",
            "branchName": "test",
            "description": "Test",
            "userStories": [
                {"id": "US-001", "title": "Story 1", "description": "Desc", "acceptanceCriteria": [], "priority": 1, "passes": true}
            ]
        }"#;
        fs::write(spec_dir.join("spec-complete.json"), complete_prd).unwrap();

        let statuses = global_status_at(&config_dir).unwrap();

        assert_eq!(statuses.len(), 1);
        assert_eq!(statuses[0].incomplete_spec_count, 1);
        assert_eq!(statuses[0].total_spec_count, 2);
    }

    // ========================================================================
    // US-007: Project tree view tests
    // ========================================================================

    #[test]
    fn test_project_tree_info_status_label_running() {
        let info = ProjectTreeInfo {
            name: "test".to_string(),
            has_active_run: true,
            run_status: Some(crate::state::RunStatus::Running),
            spec_count: 1,
            incomplete_spec_count: 0,
            spec_md_count: 0,
            runs_count: 0,
            last_run_date: None,
        };
        assert_eq!(info.status_label(), "running");
    }

    #[test]
    fn test_project_tree_info_status_label_failed() {
        let info = ProjectTreeInfo {
            name: "test".to_string(),
            has_active_run: false,
            run_status: Some(crate::state::RunStatus::Failed),
            spec_count: 1,
            incomplete_spec_count: 0,
            spec_md_count: 0,
            runs_count: 0,
            last_run_date: None,
        };
        assert_eq!(info.status_label(), "failed");
    }

    #[test]
    fn test_project_tree_info_status_label_incomplete() {
        let info = ProjectTreeInfo {
            name: "test".to_string(),
            has_active_run: false,
            run_status: None,
            spec_count: 2,
            incomplete_spec_count: 1,
            spec_md_count: 0,
            runs_count: 0,
            last_run_date: None,
        };
        assert_eq!(info.status_label(), "incomplete");
    }

    #[test]
    fn test_project_tree_info_status_label_complete() {
        let info = ProjectTreeInfo {
            name: "test".to_string(),
            has_active_run: false,
            run_status: None,
            spec_count: 2,
            incomplete_spec_count: 0,
            spec_md_count: 1,
            runs_count: 0,
            last_run_date: None,
        };
        assert_eq!(info.status_label(), "complete");
    }

    #[test]
    fn test_project_tree_info_status_label_empty() {
        let info = ProjectTreeInfo {
            name: "test".to_string(),
            has_active_run: false,
            run_status: None,
            spec_count: 0,
            incomplete_spec_count: 0,
            spec_md_count: 0,
            runs_count: 0,
            last_run_date: None,
        };
        assert_eq!(info.status_label(), "empty");
    }

    #[test]
    fn test_project_tree_info_has_content_true() {
        let info = ProjectTreeInfo {
            name: "test".to_string(),
            has_active_run: false,
            run_status: None,
            spec_count: 1,
            incomplete_spec_count: 0,
            spec_md_count: 0,
            runs_count: 0,
            last_run_date: None,
        };
        assert!(info.has_content());
    }

    #[test]
    fn test_project_tree_info_has_content_false() {
        let info = ProjectTreeInfo {
            name: "test".to_string(),
            has_active_run: false,
            run_status: None,
            spec_count: 0,
            incomplete_spec_count: 0,
            spec_md_count: 0,
            runs_count: 0,
            last_run_date: None,
        };
        assert!(!info.has_content());
    }

    #[test]
    fn test_project_tree_info_has_content_with_active_run() {
        let info = ProjectTreeInfo {
            name: "test".to_string(),
            has_active_run: true,
            run_status: Some(crate::state::RunStatus::Running),
            spec_count: 0,
            incomplete_spec_count: 0,
            spec_md_count: 0,
            runs_count: 0,
            last_run_date: None,
        };
        assert!(info.has_content());
    }

    // ========================================================================
    // US-008: Describe command tests
    // ========================================================================

    #[test]
    fn test_us008_project_exists_false_for_nonexistent() {
        let result = project_exists("nonexistent-project-xyz-12345");
        assert!(result.is_ok());
        assert!(!result.unwrap(), "nonexistent project should return false");
    }

    #[test]
    fn test_us008_get_project_description_nonexistent_project() {
        // Test getting description for a nonexistent project
        let result = get_project_description("nonexistent-project-xyz-12345");
        assert!(result.is_ok());
        assert!(
            result.unwrap().is_none(),
            "nonexistent project should return None"
        );
    }

    #[test]
    fn test_us008_spec_summary_struct_fields() {
        // Verify SpecSummary struct has all fields
        let summary = SpecSummary {
            filename: "test.json".to_string(),
            path: PathBuf::from("/test"),
            project_name: "Test Project".to_string(),
            branch_name: "feature/test".to_string(),
            description: "Test description".to_string(),
            stories: vec![StorySummary {
                id: "US-001".to_string(),
                title: "Test Story".to_string(),
                passes: true,
            }],
            completed_count: 1,
            total_count: 1,
            is_active: false,
        };

        assert_eq!(summary.filename, "test.json");
        assert_eq!(summary.project_name, "Test Project");
        assert_eq!(summary.branch_name, "feature/test");
        assert_eq!(summary.completed_count, 1);
        assert_eq!(summary.total_count, 1);
        assert!(!summary.is_active);
    }

    #[test]
    fn test_us008_story_summary_struct_fields() {
        // Verify StorySummary struct has all fields
        let story = StorySummary {
            id: "US-001".to_string(),
            title: "Test Story".to_string(),
            passes: false,
        };

        assert_eq!(story.id, "US-001");
        assert_eq!(story.title, "Test Story");
        assert!(!story.passes);
    }

    // ========================================================================
    // US-001: Config struct tests
    // ========================================================================

    #[test]
    fn test_config_default_all_true() {
        let config = Config::default();
        assert!(config.review, "review should default to true");
        assert!(config.commit, "commit should default to true");
        assert!(config.pull_request, "pull_request should default to true");
        assert!(config.worktree, "worktree should default to true");
    }

    #[test]
    fn test_config_serialize_to_toml() {
        let config = Config::default();
        let toml_str = toml::to_string(&config).unwrap();

        assert!(toml_str.contains("review = true"));
        assert!(toml_str.contains("commit = true"));
        assert!(toml_str.contains("pull_request = true"));
        assert!(toml_str.contains("worktree = true"));
    }

    #[test]
    fn test_config_deserialize_from_toml() {
        let toml_str = r#"
            review = false
            commit = true
            pull_request = false
            worktree = true
        "#;

        let config: Config = toml::from_str(toml_str).unwrap();

        assert!(!config.review);
        assert!(config.commit);
        assert!(!config.pull_request);
        assert!(config.worktree);
    }

    #[test]
    fn test_config_deserialize_partial_toml_uses_defaults() {
        // Only specify one field - others should default to their respective defaults
        let toml_str = r#"
            commit = false
        "#;

        let config: Config = toml::from_str(toml_str).unwrap();

        assert!(config.review, "missing review should default to true");
        assert!(!config.commit, "commit should be false as specified");
        assert!(
            config.pull_request,
            "missing pull_request should default to true"
        );
        assert!(config.worktree, "missing worktree should default to true");
    }

    #[test]
    fn test_config_deserialize_empty_toml_uses_all_defaults() {
        let toml_str = "";

        let config: Config = toml::from_str(toml_str).unwrap();

        assert!(config.review);
        assert!(config.commit);
        assert!(config.pull_request);
        assert!(config.worktree);
    }

    #[test]
    fn test_config_roundtrip() {
        let original = Config {
            review: false,
            commit: true,
            pull_request: false,
            worktree: true,
            ..Default::default()
        };

        let toml_str = toml::to_string(&original).unwrap();
        let deserialized: Config = toml::from_str(&toml_str).unwrap();

        assert_eq!(original, deserialized);
    }

    #[test]
    fn test_config_equality() {
        let config1 = Config::default();
        let config2 = Config::default();
        assert_eq!(config1, config2);

        let config3 = Config {
            review: false,
            ..Default::default()
        };
        assert_ne!(config1, config3);
    }

    #[test]
    fn test_config_clone() {
        let original = Config {
            review: false,
            commit: true,
            pull_request: false,
            worktree: true,
            ..Default::default()
        };

        let cloned = original.clone();
        assert_eq!(original, cloned);
    }

    #[test]
    fn test_config_debug_format() {
        let config = Config::default();
        let debug_str = format!("{:?}", config);

        assert!(debug_str.contains("Config"));
        assert!(debug_str.contains("review"));
        assert!(debug_str.contains("commit"));
        assert!(debug_str.contains("pull_request"));
        assert!(debug_str.contains("worktree"));
    }

    // ========================================================================
    // US-002: Global Config File Management tests
    // ========================================================================

    #[test]
    fn test_generate_config_with_comments_includes_all_fields() {
        let config = Config::default();
        let content = generate_config_with_comments(&config);

        // Check that all field values are present
        assert!(content.contains("review = true"));
        assert!(content.contains("commit = true"));
        assert!(content.contains("pull_request = true"));
        assert!(content.contains("worktree = true"));
    }

    #[test]
    fn test_generate_config_with_comments_has_explanatory_comments() {
        let config = Config::default();
        let content = generate_config_with_comments(&config);

        // Check that comments explain each option
        assert!(content.contains("# Review state"));
        assert!(content.contains("# Commit state"));
        assert!(content.contains("# Pull request state"));
        assert!(content.contains("# Worktree mode"));

        // Check that true/false meanings are explained
        assert!(content.contains("- true:"));
        assert!(content.contains("- false:"));
    }

    #[test]
    fn test_generate_config_with_comments_preserves_custom_values() {
        let config = Config {
            review: false,
            commit: true,
            pull_request: false,
            worktree: true,
            ..Default::default()
        };
        let content = generate_config_with_comments(&config);

        assert!(content.contains("review = false"));
        assert!(content.contains("commit = true"));
        assert!(content.contains("pull_request = false"));
        assert!(content.contains("worktree = true"));
    }

    #[test]
    fn test_default_config_with_comments_is_valid_toml() {
        // Verify the default config string can be parsed
        let config: Config = toml::from_str(DEFAULT_CONFIG_WITH_COMMENTS).unwrap();

        assert!(config.review);
        assert!(config.commit);
        assert!(config.pull_request);
        assert!(config.worktree);
    }

    #[test]
    fn test_load_global_config_creates_file_when_missing() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        let config_path = config_dir.join("config.toml");
        assert!(
            !config_path.exists(),
            "Config file should not exist initially"
        );

        // We can't easily test the real load_global_config because it uses the real home dir,
        // but we can test the underlying logic by simulating it
        let content = DEFAULT_CONFIG_WITH_COMMENTS;
        fs::write(&config_path, content).unwrap();

        let loaded: Config = toml::from_str(&fs::read_to_string(&config_path).unwrap()).unwrap();
        assert_eq!(loaded, Config::default());
    }

    #[test]
    fn test_save_and_load_global_config_roundtrip() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        let config_path = config_dir.join("config.toml");

        // Create a custom config
        let custom_config = Config {
            review: false,
            commit: true,
            pull_request: false,
            ..Default::default()
        };

        // Write it
        let content = generate_config_with_comments(&custom_config);
        fs::write(&config_path, content).unwrap();

        // Read it back
        let loaded: Config = toml::from_str(&fs::read_to_string(&config_path).unwrap()).unwrap();

        assert_eq!(loaded, custom_config);
    }

    #[test]
    fn test_load_global_config_handles_partial_config() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        let config_path = config_dir.join("config.toml");

        // Write a partial config (missing pull_request)
        let partial_content = r#"
# Partial config
review = false
commit = true
"#;
        fs::write(&config_path, partial_content).unwrap();

        // Read it back - missing fields should use defaults
        let loaded: Config = toml::from_str(&fs::read_to_string(&config_path).unwrap()).unwrap();

        assert!(!loaded.review);
        assert!(loaded.commit);
        assert!(
            loaded.pull_request,
            "Missing pull_request should default to true"
        );
    }

    #[test]
    fn test_generated_config_includes_note_about_pr_requiring_commit() {
        let config = Config::default();
        let content = generate_config_with_comments(&config);

        // The config should mention that PR requires commit
        assert!(
            content.contains("Requires commit = true"),
            "Config should note that PR requires commit"
        );
    }

    #[test]
    fn test_global_config_file_has_comments_after_save() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        let config_path = config_dir.join("config.toml");

        // Save a config
        let config = Config::default();
        let content = generate_config_with_comments(&config);
        fs::write(&config_path, content).unwrap();

        // Read raw content and verify comments are present
        let raw_content = fs::read_to_string(&config_path).unwrap();
        assert!(
            raw_content.contains("#"),
            "Config file should contain comments"
        );
        assert!(
            raw_content.contains("# Autom8 Configuration"),
            "Config file should have header comment"
        );
    }

    // ========================================================================
    // US-003: Per-Project Config Inheritance tests
    // ========================================================================

    #[test]
    fn test_us003_project_config_path_for_returns_correct_path() {
        let path = project_config_path_for("my-test-project").unwrap();
        assert!(path.ends_with("config.toml"));
        assert!(path.parent().unwrap().ends_with("my-test-project"));
    }

    #[test]
    fn test_us003_load_project_config_creates_from_global_when_missing() {
        // Use temp directory to avoid race conditions
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        // Create global config
        let global_config = Config {
            review: true,
            commit: false,
            pull_request: false,
            ..Default::default()
        };
        let global_path = config_dir.join("config.toml");
        let global_content = generate_config_with_comments(&global_config);
        fs::write(&global_path, &global_content).unwrap();

        // Create project directory (no config file yet)
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(project_dir.join("spec")).unwrap();
        fs::create_dir_all(project_dir.join("runs")).unwrap();

        let project_config_path = project_dir.join("config.toml");
        assert!(
            !project_config_path.exists(),
            "Project config should not exist initially"
        );

        // Simulate load_project_config: when project config doesn't exist,
        // copy global config content to project config
        fs::write(&project_config_path, &global_content).unwrap();

        // Verify project config was created
        assert!(
            project_config_path.exists(),
            "Project config should be created when missing"
        );

        // Verify it matches global config
        let loaded: Config =
            toml::from_str(&fs::read_to_string(&project_config_path).unwrap()).unwrap();
        assert_eq!(
            loaded, global_config,
            "Project config should match global config"
        );
    }

    #[test]
    fn test_us003_load_project_config_preserves_comments() {
        // Use temp directory to avoid race conditions
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(&project_dir).unwrap();

        // Create global config (used as source for project config creation)
        let global_config = Config::default();
        let global_path = config_dir.join("config.toml");
        let global_content = generate_config_with_comments(&global_config);
        fs::write(&global_path, &global_content).unwrap();

        // Simulate load_project_config: copy global to project when missing
        let project_config_path = project_dir.join("config.toml");
        assert!(!project_config_path.exists());

        // Copy global config content to project config (as load_project_config does)
        fs::write(&project_config_path, &global_content).unwrap();

        // Verify comments are present
        let raw_content = fs::read_to_string(&project_config_path).unwrap();

        assert!(
            raw_content.contains("#"),
            "Project config should contain comments"
        );
        assert!(
            raw_content.contains("# Autom8 Configuration"),
            "Project config should have header comment"
        );
        assert!(
            raw_content.contains("# Review state"),
            "Project config should have review state comment"
        );
    }

    #[test]
    fn test_us003_save_project_config_creates_file() {
        // Use temp directory to avoid race conditions
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(project_dir.join("spec")).unwrap();
        fs::create_dir_all(project_dir.join("runs")).unwrap();

        let config = Config {
            review: false,
            commit: true,
            pull_request: true,
            ..Default::default()
        };

        // Simulate save_project_config
        let project_config_path = project_dir.join("config.toml");
        let content = generate_config_with_comments(&config);
        fs::write(&project_config_path, &content).unwrap();

        // Verify file exists and can be loaded
        assert!(project_config_path.exists());

        let loaded: Config =
            toml::from_str(&fs::read_to_string(&project_config_path).unwrap()).unwrap();
        assert_eq!(loaded, config);
    }

    #[test]
    fn test_us003_save_project_config_preserves_comments() {
        // Use temp directory to avoid race conditions
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(&project_dir).unwrap();

        let config = Config::default();
        let project_config_path = project_dir.join("config.toml");
        let content = generate_config_with_comments(&config);
        fs::write(&project_config_path, &content).unwrap();

        let raw_content = fs::read_to_string(&project_config_path).unwrap();

        assert!(
            raw_content.contains("#"),
            "Saved config should contain comments"
        );
        assert!(
            raw_content.contains("# Autom8 Configuration"),
            "Saved config should have header comment"
        );
    }

    #[test]
    fn test_us003_get_effective_config_returns_project_if_exists() {
        // Use temp directory to avoid race conditions
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        // Create global config first
        let global_config = Config::default();
        let global_path = config_dir.join("config.toml");
        fs::write(&global_path, generate_config_with_comments(&global_config)).unwrap();

        // Create project config with distinct values
        let project_config = Config {
            review: false,
            commit: false,
            pull_request: false,
            ..Default::default()
        };
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(&project_dir).unwrap();
        let project_path = project_dir.join("config.toml");
        fs::write(
            &project_path,
            generate_config_with_comments(&project_config),
        )
        .unwrap();

        // Simulate get_effective_config logic
        let effective_path = if project_path.exists() {
            &project_path
        } else {
            &global_path
        };

        let effective: Config =
            toml::from_str(&fs::read_to_string(effective_path).unwrap()).unwrap();
        assert_eq!(
            effective, project_config,
            "Should return project config when it exists"
        );
    }

    #[test]
    fn test_us003_get_effective_config_returns_global_when_project_missing() {
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        // Create global config
        let global_config = Config {
            review: true,
            commit: true,
            pull_request: false,
            ..Default::default()
        };
        let global_path = config_dir.join("config.toml");
        let content = generate_config_with_comments(&global_config);
        fs::write(&global_path, content).unwrap();

        // Create project dir but NOT project config
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(&project_dir).unwrap();

        // We can't directly test get_effective_config with temp dirs,
        // but we can verify the logic by checking path existence
        let project_config_path = project_dir.join("config.toml");
        assert!(
            !project_config_path.exists(),
            "Project config should not exist"
        );
        assert!(global_path.exists(), "Global config should exist");

        // Load global config to verify
        let loaded: Config = toml::from_str(&fs::read_to_string(&global_path).unwrap()).unwrap();
        assert_eq!(loaded, global_config);
    }

    #[test]
    fn test_us003_project_config_takes_precedence_over_global() {
        // Simulate project config overriding global with temp directories
        // to avoid race conditions with other tests
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        // Create global config
        let global_config = Config {
            review: true,
            commit: true,
            pull_request: true,
            ..Default::default()
        };
        let global_path = config_dir.join("config.toml");
        fs::write(&global_path, generate_config_with_comments(&global_config)).unwrap();

        // Create project config with different values
        let project_config = Config {
            review: false,
            commit: true,
            pull_request: false,
            ..Default::default()
        };
        let project_dir = config_dir.join("my-project");
        fs::create_dir_all(&project_dir).unwrap();
        let project_path = project_dir.join("config.toml");
        fs::write(
            &project_path,
            generate_config_with_comments(&project_config),
        )
        .unwrap();

        // Simulate get_effective_config logic: prefer project if exists
        let effective_path = if project_path.exists() {
            &project_path
        } else {
            &global_path
        };

        let effective: Config =
            toml::from_str(&fs::read_to_string(effective_path).unwrap()).unwrap();
        assert_eq!(
            effective, project_config,
            "Project config should take precedence over global"
        );
        assert_ne!(
            effective, global_config,
            "Should not return global config when project config exists"
        );
    }

    #[test]
    fn test_us003_get_effective_config_does_not_create_project_config() {
        // Use temp directory to test the logic
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        // Create global config
        let global_config = Config::default();
        let global_path = config_dir.join("config.toml");
        fs::write(&global_path, generate_config_with_comments(&global_config)).unwrap();

        // Create project dir but NOT project config
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(&project_dir).unwrap();
        let project_config_path = project_dir.join("config.toml");

        // Simulate get_effective_config: it should NOT create project config
        assert!(
            !project_config_path.exists(),
            "Project config should not exist before"
        );

        // Simulate reading effective config (prefer project if exists, else global)
        let effective_path = if project_config_path.exists() {
            &project_config_path
        } else {
            &global_path
        };
        let _effective: Config =
            toml::from_str(&fs::read_to_string(effective_path).unwrap()).unwrap();

        // get_effective_config should NOT have created the project config
        assert!(
            !project_config_path.exists(),
            "get_effective_config should NOT create project config"
        );
    }

    #[test]
    fn test_us003_project_config_roundtrip() {
        // Use temp directory to avoid race conditions
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(&project_dir).unwrap();

        let original = Config {
            review: false,
            commit: true,
            pull_request: false,
            ..Default::default()
        };

        // Save
        let project_config_path = project_dir.join("config.toml");
        let content = generate_config_with_comments(&original);
        fs::write(&project_config_path, &content).unwrap();

        // Load
        let loaded: Config =
            toml::from_str(&fs::read_to_string(&project_config_path).unwrap()).unwrap();

        assert_eq!(original, loaded, "Config should survive save/load cycle");
    }

    #[test]
    fn test_us003_project_config_handles_partial_config() {
        // Use temp directory to avoid race conditions
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(&project_dir).unwrap();

        let project_config_path = project_dir.join("config.toml");

        // Write a partial config (missing some fields)
        let partial_content = r#"
# Partial project config
review = false
"#;
        fs::write(&project_config_path, partial_content).unwrap();

        // Load should fill in defaults for missing fields
        let loaded: Config =
            toml::from_str(&fs::read_to_string(&project_config_path).unwrap()).unwrap();

        assert!(!loaded.review, "review should be false as specified");
        assert!(loaded.commit, "missing commit should default to true");
        assert!(
            loaded.pull_request,
            "missing pull_request should default to true"
        );
    }

    #[test]
    fn test_us003_inheritance_simulation_with_temp_dirs() {
        // Simulate the full inheritance flow with temp directories
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        // Create global config
        let global_config = Config {
            review: true,
            commit: false,
            pull_request: false,
            ..Default::default()
        };
        let global_content = generate_config_with_comments(&global_config);
        let global_path = config_dir.join("config.toml");
        fs::write(&global_path, &global_content).unwrap();

        // Create project directory
        let project_dir = config_dir.join("test-project");
        fs::create_dir_all(project_dir.join("spec")).unwrap();
        fs::create_dir_all(project_dir.join("runs")).unwrap();

        // Simulate load_project_config behavior: copy global to project
        let project_config_path = project_dir.join("config.toml");
        assert!(!project_config_path.exists());

        // Copy global config content to project config
        fs::write(&project_config_path, &global_content).unwrap();

        // Verify project config exists and matches global
        assert!(project_config_path.exists());
        let loaded: Config =
            toml::from_str(&fs::read_to_string(&project_config_path).unwrap()).unwrap();
        assert_eq!(
            loaded, global_config,
            "Project config should inherit from global"
        );

        // Verify comments were preserved
        let project_content = fs::read_to_string(&project_config_path).unwrap();
        assert!(project_content.contains("# Autom8 Configuration"));
        assert!(project_content.contains("# Review state"));
    }

    #[test]
    fn test_us003_project_config_override_simulation() {
        // Simulate project config overriding global with different values
        let temp_dir = TempDir::new().unwrap();
        let config_dir = temp_dir.path().join(".config").join("autom8");
        fs::create_dir_all(&config_dir).unwrap();

        // Create global config
        let global_config = Config {
            review: true,
            commit: true,
            pull_request: true,
            ..Default::default()
        };
        let global_path = config_dir.join("config.toml");
        fs::write(&global_path, generate_config_with_comments(&global_config)).unwrap();

        // Create project config with different values
        let project_config = Config {
            review: false,
            commit: true,
            pull_request: false,
            ..Default::default()
        };
        let project_dir = config_dir.join("my-project");
        fs::create_dir_all(&project_dir).unwrap();
        let project_path = project_dir.join("config.toml");
        fs::write(
            &project_path,
            generate_config_with_comments(&project_config),
        )
        .unwrap();

        // Simulate get_effective_config logic: prefer project if exists
        let effective_path = if project_path.exists() {
            &project_path
        } else {
            &global_path
        };

        let effective: Config =
            toml::from_str(&fs::read_to_string(effective_path).unwrap()).unwrap();
        assert_eq!(
            effective, project_config,
            "Project config should take precedence"
        );
        assert_ne!(effective.review, global_config.review);
        assert_ne!(effective.pull_request, global_config.pull_request);
    }

    // =========================================================================
    // US-004: Config Validation Tests
    // =========================================================================

    #[test]
    fn test_us004_validate_config_accepts_default_config() {
        let config = Config::default();
        assert!(validate_config(&config).is_ok());
    }

    #[test]
    fn test_us004_validate_config_accepts_all_true() {
        let config = Config {
            review: true,
            commit: true,
            pull_request: true,
            ..Default::default()
        };
        assert!(validate_config(&config).is_ok());
    }

    #[test]
    fn test_us004_validate_config_accepts_all_false() {
        let config = Config {
            review: false,
            commit: false,
            pull_request: false,
            ..Default::default()
        };
        assert!(validate_config(&config).is_ok());
    }

    #[test]
    fn test_us004_validate_config_accepts_commit_true_pr_false() {
        let config = Config {
            review: true,
            commit: true,
            pull_request: false,
            ..Default::default()
        };
        assert!(validate_config(&config).is_ok());
    }

    #[test]
    fn test_us004_validate_config_accepts_commit_false_pr_false() {
        let config = Config {
            review: true,
            commit: false,
            pull_request: false,
            ..Default::default()
        };
        assert!(validate_config(&config).is_ok());
    }

    #[test]
    fn test_us004_validate_config_rejects_pr_true_commit_false() {
        let config = Config {
            review: true,
            commit: false,
            pull_request: true,
            ..Default::default()
        };
        let result = validate_config(&config);
        assert!(result.is_err());
        assert_eq!(result.unwrap_err(), ConfigError::PullRequestWithoutCommit);
    }

    #[test]
    fn test_us004_config_error_message_is_actionable() {
        let error = ConfigError::PullRequestWithoutCommit;
        let message = error.to_string();

        // Verify the error message contains the exact required text
        assert_eq!(
            message,
            "Cannot create pull request without commits. \
            Either set `commit = true` or set `pull_request = false`"
        );
    }

    #[test]
    fn test_us004_config_error_implements_error_trait() {
        let error = ConfigError::PullRequestWithoutCommit;
        // Verify it implements std::error::Error
        let _: &dyn std::error::Error = &error;
    }

    #[test]
    fn test_us004_config_error_debug_format() {
        let error = ConfigError::PullRequestWithoutCommit;
        let debug_str = format!("{:?}", error);
        assert!(debug_str.contains("PullRequestWithoutCommit"));
    }

    #[test]
    fn test_us004_config_error_clone() {
        let error = ConfigError::PullRequestWithoutCommit;
        let cloned = error.clone();
        assert_eq!(error, cloned);
    }

    #[test]
    fn test_us004_validate_config_accepts_review_false_with_valid_pr_commit() {
        // Review state doesn't affect PR/commit validation
        let config = Config {
            review: false,
            commit: true,
            pull_request: true,
            ..Default::default()
        };
        assert!(validate_config(&config).is_ok());
    }

    #[test]
    fn test_us004_validate_config_all_combinations() {
        // Test all 8 possible boolean combinations (for review, commit, pull_request)
        let combinations = [
            (false, false, false, true), // all false - valid
            (false, false, true, false), // pr=true, commit=false - invalid
            (false, true, false, true),  // commit=true, pr=false - valid
            (false, true, true, true),   // commit=true, pr=true - valid
            (true, false, false, true),  // review=true, commit=false, pr=false - valid
            (true, false, true, false),  // review=true, pr=true, commit=false - invalid
            (true, true, false, true),   // review=true, commit=true, pr=false - valid
            (true, true, true, true),    // all true - valid
        ];

        for (review, commit, pull_request, should_be_valid) in combinations {
            let config = Config {
                review,
                commit,
                pull_request,
                ..Default::default()
            };
            let result = validate_config(&config);
            assert_eq!(
                result.is_ok(),
                should_be_valid,
                "Config (review={}, commit={}, pull_request={}) expected valid={}, got valid={}",
                review,
                commit,
                pull_request,
                should_be_valid,
                result.is_ok()
            );
        }
    }

    #[test]
    fn test_us004_get_effective_config_validates_before_returning() {
        // This test verifies that get_effective_config validates the loaded config
        // We can't easily test this with real files in a unit test, but we can
        // verify the validation function is called by testing with a simulated scenario

        // Create an invalid config directly and validate it
        let invalid_config = Config {
            review: true,
            commit: false,
            pull_request: true,
            ..Default::default()
        };
        let validation_result = validate_config(&invalid_config);
        assert!(validation_result.is_err());

        // Verify the error message contains actionable information
        let error = validation_result.unwrap_err();
        let message = error.to_string();
        assert!(message.contains("commit = true"));
        assert!(message.contains("pull_request = false"));
    }

    #[test]
    fn test_us004_validation_integration_with_autom8_error() {
        // Verify ConfigError can be converted to Autom8Error::Config
        let config_error = ConfigError::PullRequestWithoutCommit;
        let autom8_error = Autom8Error::Config(config_error.to_string());

        // The error message should be preserved
        let error_string = format!("{}", autom8_error);
        assert!(error_string.contains("Cannot create pull request without commits"));
    }

    // =========================================================================
    // Test: config files with use_tui should still parse (backwards compat)
    // =========================================================================

    #[test]
    fn test_config_with_use_tui_field_still_parses() {
        // Old config files may still have use_tui field - ensure they parse without error
        let toml_str = r#"
            review = true
            commit = true
            pull_request = true
            use_tui = true
        "#;
        // This should parse successfully (use_tui is ignored)
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(config.review);
        assert!(config.commit);
        assert!(config.pull_request);
    }

    // ========================================================================
    // US-005: Worktree Configuration Option tests
    // ========================================================================

    #[test]
    fn test_worktree_config_defaults_to_true() {
        let config = Config::default();
        assert!(config.worktree, "worktree should default to true");
    }

    #[test]
    fn test_worktree_config_can_be_enabled() {
        let toml_str = r#"
            worktree = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            config.worktree,
            "worktree should be true when set in config"
        );
    }

    #[test]
    fn test_worktree_config_missing_defaults_to_true() {
        // Config files without worktree field should default to true
        let toml_str = r#"
            review = true
            commit = true
            pull_request = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            config.worktree,
            "missing worktree field should default to true"
        );
    }

    #[test]
    fn test_worktree_config_explicit_false() {
        let toml_str = r#"
            worktree = false
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            !config.worktree,
            "explicit worktree = false should be respected"
        );
    }

    #[test]
    fn test_worktree_config_with_all_other_fields() {
        let toml_str = r#"
            review = false
            commit = true
            pull_request = false
            worktree = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(!config.review);
        assert!(config.commit);
        assert!(!config.pull_request);
        assert!(config.worktree);
    }

    #[test]
    fn test_worktree_config_documentation_note_in_generated_comments() {
        let config = Config::default();
        let content = generate_config_with_comments(&config);

        // Verify the git repository requirement note is documented
        assert!(
            content.contains("Requires a git repository"),
            "config comments should document git repo requirement"
        );
    }

    // ========================================================================
    // US-008: worktree_cleanup configuration tests
    // ========================================================================

    #[test]
    fn test_worktree_cleanup_config_defaults_to_false() {
        let config = Config::default();
        assert!(
            !config.worktree_cleanup,
            "worktree_cleanup should default to false for backward compatibility"
        );
    }

    #[test]
    fn test_worktree_cleanup_config_can_be_enabled() {
        let toml_str = r#"
            worktree_cleanup = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            config.worktree_cleanup,
            "worktree_cleanup should be true when set in config"
        );
    }

    #[test]
    fn test_worktree_cleanup_config_missing_defaults_to_false() {
        // Old config files without worktree_cleanup field should still work
        let toml_str = r#"
            review = true
            commit = true
            worktree = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            !config.worktree_cleanup,
            "missing worktree_cleanup field should default to false"
        );
    }

    #[test]
    fn test_worktree_cleanup_config_explicit_false() {
        let toml_str = r#"
            worktree_cleanup = false
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            !config.worktree_cleanup,
            "explicit worktree_cleanup = false should be respected"
        );
    }

    #[test]
    fn test_worktree_cleanup_config_with_all_worktree_fields() {
        let toml_str = r#"
            worktree = true
            worktree_path_pattern = "{repo}-test-{branch}"
            worktree_cleanup = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(config.worktree);
        assert_eq!(config.worktree_path_pattern, "{repo}-test-{branch}");
        assert!(config.worktree_cleanup);
    }

    #[test]
    fn test_worktree_cleanup_in_generated_comments() {
        let config = Config {
            worktree_cleanup: true,
            ..Default::default()
        };
        let content = generate_config_with_comments(&config);

        // Verify worktree_cleanup is documented
        assert!(
            content.contains("worktree_cleanup = true"),
            "generated config should include worktree_cleanup setting"
        );
        assert!(
            content.contains("successful completion"),
            "config comments should document cleanup behavior"
        );
    }

    #[test]
    fn test_worktree_cleanup_in_default_config_with_comments() {
        // Verify DEFAULT_CONFIG_WITH_COMMENTS includes worktree_cleanup
        assert!(
            DEFAULT_CONFIG_WITH_COMMENTS.contains("worktree_cleanup"),
            "DEFAULT_CONFIG_WITH_COMMENTS should include worktree_cleanup"
        );
        assert!(
            DEFAULT_CONFIG_WITH_COMMENTS.contains("worktree_cleanup = false"),
            "DEFAULT_CONFIG_WITH_COMMENTS should have worktree_cleanup = false"
        );
    }

    #[test]
    fn test_worktree_cleanup_serialization_roundtrip() {
        let config = Config {
            worktree: true,
            worktree_cleanup: true,
            ..Default::default()
        };

        // Serialize to TOML
        let toml_str = toml::to_string(&config).unwrap();
        assert!(toml_str.contains("worktree_cleanup = true"));

        // Deserialize back
        let parsed: Config = toml::from_str(&toml_str).unwrap();
        assert_eq!(parsed.worktree_cleanup, config.worktree_cleanup);
    }

    // ========================================================================
    // US-001 (draft-pr-config): pull_request_draft configuration tests
    // ========================================================================

    #[test]
    fn test_pull_request_draft_config_defaults_to_false() {
        let config = Config::default();
        assert!(
            !config.pull_request_draft,
            "pull_request_draft should default to false for backward compatibility"
        );
    }

    #[test]
    fn test_pull_request_draft_config_can_be_enabled() {
        let toml_str = r#"
            pull_request_draft = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            config.pull_request_draft,
            "pull_request_draft should be true when set in config"
        );
    }

    #[test]
    fn test_pull_request_draft_config_missing_defaults_to_false() {
        // Old config files without pull_request_draft field should still work
        let toml_str = r#"
            review = true
            commit = true
            pull_request = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            !config.pull_request_draft,
            "missing pull_request_draft field should default to false"
        );
    }

    #[test]
    fn test_pull_request_draft_config_explicit_false() {
        let toml_str = r#"
            pull_request_draft = false
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(
            !config.pull_request_draft,
            "explicit pull_request_draft = false should be respected"
        );
    }

    #[test]
    fn test_pull_request_draft_config_with_all_pr_fields() {
        let toml_str = r#"
            pull_request = true
            pull_request_draft = true
        "#;
        let config: Config = toml::from_str(toml_str).unwrap();
        assert!(config.pull_request);
        assert!(config.pull_request_draft);
    }

    #[test]
    fn test_pull_request_draft_in_generated_comments() {
        let config = Config {
            pull_request_draft: true,
            ..Default::default()
        };
        let content = generate_config_with_comments(&config);

        // Verify pull_request_draft is documented
        assert!(
            content.contains("pull_request_draft = true"),
            "generated config should include pull_request_draft setting"
        );
        assert!(
            content.contains("draft mode"),
            "config comments should document draft mode behavior"
        );
    }

    #[test]
    fn test_pull_request_draft_in_default_config_with_comments() {
        // Verify DEFAULT_CONFIG_WITH_COMMENTS includes pull_request_draft
        assert!(
            DEFAULT_CONFIG_WITH_COMMENTS.contains("pull_request_draft"),
            "DEFAULT_CONFIG_WITH_COMMENTS should include pull_request_draft"
        );
        assert!(
            DEFAULT_CONFIG_WITH_COMMENTS.contains("pull_request_draft = false"),
            "DEFAULT_CONFIG_WITH_COMMENTS should have pull_request_draft = false"
        );
    }

    #[test]
    fn test_pull_request_draft_serialization_roundtrip() {
        let config = Config {
            pull_request: true,
            pull_request_draft: true,
            ..Default::default()
        };

        // Serialize to TOML
        let toml_str = toml::to_string(&config).unwrap();
        assert!(toml_str.contains("pull_request_draft = true"));

        // Deserialize back
        let parsed: Config = toml::from_str(&toml_str).unwrap();
        assert_eq!(parsed.pull_request_draft, config.pull_request_draft);
    }

    // US-001: Conditional Story Display in Describe View

    #[test]
    fn test_us001_spec_summary_is_active_field() {
        // Verify SpecSummary has is_active field
        let spec_active = SpecSummary {
            filename: "spec-active.json".to_string(),
            path: PathBuf::from("/test/spec-active.json"),
            project_name: "test".to_string(),
            branch_name: "feature/active".to_string(),
            description: "Active spec".to_string(),
            stories: vec![],
            completed_count: 0,
            total_count: 0,
            is_active: true,
        };

        let spec_inactive = SpecSummary {
            filename: "spec-inactive.json".to_string(),
            path: PathBuf::from("/test/spec-inactive.json"),
            project_name: "test".to_string(),
            branch_name: "feature/inactive".to_string(),
            description: "Inactive spec".to_string(),
            stories: vec![],
            completed_count: 0,
            total_count: 0,
            is_active: false,
        };

        assert!(spec_active.is_active);
        assert!(!spec_inactive.is_active);
    }

    // ========================================================================
    // US-004: Last Run Time Accuracy Tests
    // ========================================================================

    /// Helper function to compute the most meaningful timestamp for a run.
    /// This mirrors the logic in `list_projects_tree()` for testability.
    fn compute_last_run_timestamp(
        has_active_run: bool,
        run_started_at: Option<chrono::DateTime<chrono::Utc>>,
        run_finished_at: Option<chrono::DateTime<chrono::Utc>>,
        archived_started_at: Option<chrono::DateTime<chrono::Utc>>,
        archived_finished_at: Option<chrono::DateTime<chrono::Utc>>,
    ) -> Option<chrono::DateTime<chrono::Utc>> {
        if has_active_run {
            // Active run: show when it started
            run_started_at
        } else {
            // No active run: prefer finished_at over started_at
            run_finished_at
                .or(run_started_at)
                .or(archived_finished_at)
                .or(archived_started_at)
        }
    }

    #[test]
    fn test_us004_last_run_date_active_run_uses_started_at() {
        use chrono::{Duration, Utc};

        let started_at = Utc::now() - Duration::minutes(30);
        let finished_at = None; // Active runs don't have finished_at

        let result = compute_last_run_timestamp(
            true,             // has_active_run
            Some(started_at), // run_started_at
            finished_at,      // run_finished_at
            None,             // archived_started_at
            None,             // archived_finished_at
        );

        assert_eq!(result, Some(started_at));
    }

    #[test]
    fn test_us004_last_run_date_completed_run_uses_finished_at() {
        use chrono::{Duration, Utc};

        let started_at = Utc::now() - Duration::hours(2);
        let finished_at = Utc::now() - Duration::minutes(30);

        let result = compute_last_run_timestamp(
            false,             // has_active_run (completed)
            Some(started_at),  // run_started_at
            Some(finished_at), // run_finished_at
            None,              // archived_started_at
            None,              // archived_finished_at
        );

        // Should use finished_at, not started_at
        assert_eq!(result, Some(finished_at));
    }

    #[test]
    fn test_us004_last_run_date_completed_run_fallback_to_started_at() {
        use chrono::{Duration, Utc};

        let started_at = Utc::now() - Duration::hours(2);
        // finished_at is None (run may have been interrupted before completion)

        let result = compute_last_run_timestamp(
            false,            // has_active_run (completed)
            Some(started_at), // run_started_at
            None,             // run_finished_at (missing)
            None,             // archived_started_at
            None,             // archived_finished_at
        );

        // Should fall back to started_at when finished_at is missing
        assert_eq!(result, Some(started_at));
    }

    #[test]
    fn test_us004_last_run_date_archived_run_uses_finished_at() {
        use chrono::{Duration, Utc};

        let archived_started_at = Utc::now() - Duration::days(1);
        let archived_finished_at = Utc::now() - Duration::hours(23);

        let result = compute_last_run_timestamp(
            false,                      // has_active_run
            None,                       // run_started_at (no current run)
            None,                       // run_finished_at
            Some(archived_started_at),  // archived_started_at
            Some(archived_finished_at), // archived_finished_at
        );

        // Should use archived finished_at
        assert_eq!(result, Some(archived_finished_at));
    }

    #[test]
    fn test_us004_last_run_date_no_runs_returns_none() {
        let result = compute_last_run_timestamp(
            false, // has_active_run
            None,  // run_started_at
            None,  // run_finished_at
            None,  // archived_started_at
            None,  // archived_finished_at
        );

        assert_eq!(result, None);
    }

    #[test]
    fn test_us004_last_run_date_prefers_current_over_archived() {
        use chrono::{Duration, Utc};

        // Current run is more recent but completed
        let current_started_at = Utc::now() - Duration::hours(1);
        let current_finished_at = Utc::now() - Duration::minutes(30);

        // Older archived run
        let archived_started_at = Utc::now() - Duration::days(7);
        let archived_finished_at = Utc::now() - Duration::days(7) + Duration::hours(2);

        let result = compute_last_run_timestamp(
            false,                      // has_active_run
            Some(current_started_at),   // run_started_at
            Some(current_finished_at),  // run_finished_at
            Some(archived_started_at),  // archived_started_at
            Some(archived_finished_at), // archived_finished_at
        );

        // Should use current run's finished_at, not archived
        assert_eq!(result, Some(current_finished_at));
    }
}