steer-cli 0.1.5

use eyre::{Context, Result};
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use std::collections::{HashMap, HashSet};
use std::path::PathBuf;
use steer_core::session::{
    BackendConfig, BashToolConfig, ContainerRuntime, RemoteAuth, SessionConfig, SessionToolConfig,
    ToolApprovalPolicy, ToolSpecificConfig, ToolVisibility, WorkspaceConfig,
};
use thiserror::Error;
use tokio::fs;
use tracing::debug;

/// Session configuration validation errors
#[derive(Debug, Error)]
pub enum SessionConfigError {
    #[error("MCP backend server_name cannot be empty")]
    EmptyServerName,

    #[error("MCP stdio transport command cannot be empty")]
    EmptyStdioCommand,

    #[error("MCP TCP transport host cannot be empty")]
    EmptyTcpHost,

    #[error("MCP TCP transport port cannot be 0")]
    InvalidTcpPort,

    #[error("MCP Unix transport path cannot be empty")]
    EmptyUnixPath,

    #[error("MCP SSE transport url cannot be empty")]
    EmptySseUrl,

    #[error("MCP HTTP transport url cannot be empty")]
    EmptyHttpUrl,

    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),

    #[error("TOML parse error: {0}")]
    TomlParse(#[from] toml::de::Error),
}

/// Partial session configuration that can be loaded from a TOML file.
/// All fields are optional so users can specify only what they want to override.
#[derive(Debug, Deserialize, Serialize, Default, JsonSchema)]
pub struct PartialSessionConfig {
    #[schemars(description = "URL to the JSON schema file")]
    #[serde(rename = "$schema")]
    pub schema: Option<String>,
    pub workspace: Option<PartialWorkspaceConfig>,
    pub tool_config: Option<PartialToolConfig>,
    pub system_prompt: Option<String>,
    pub metadata: Option<HashMap<String, String>>,
}

#[derive(Debug, Deserialize, Serialize, JsonSchema)]
#[serde(tag = "type", rename_all = "snake_case")]
pub enum PartialWorkspaceConfig {
    Local {
        #[serde(default)]
        path: Option<PathBuf>,
    },
    Remote {
        agent_address: String,
        auth: Option<RemoteAuth>,
    },
    Container {
        image: String,
        runtime: ContainerRuntime,
    },
}

#[derive(Debug, Deserialize, Serialize, Default, JsonSchema)]
#[schemars(deny_unknown_fields)]
pub struct PartialToolConfig {
    pub backends: Option<Vec<BackendConfig>>,
    pub visibility: Option<ToolVisibilityConfig>,
    pub approval_policy: Option<ToolApprovalPolicyConfig>,
    #[serde(default)]
    pub tools: Option<HashMap<String, PartialToolSpecificConfig>>,
}

#[derive(Debug, Deserialize, Serialize, JsonSchema)]
#[serde(untagged)]
pub enum PartialToolSpecificConfig {
    Bash(PartialBashConfig),
}

#[derive(Debug, Deserialize, Serialize, JsonSchema)]
pub struct PartialBashConfig {
    pub approved_patterns: Option<Vec<String>>,
}

#[derive(Debug, Deserialize, Serialize, JsonSchema)]
#[serde(untagged)]
pub enum ToolVisibilityConfig {
    String(String), // "all" or "read_only"
    Object(ToolVisibilityObject),
}

#[derive(Debug, Deserialize, Serialize, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum ToolVisibilityObject {
    Whitelist(HashSet<String>),
    Blacklist(HashSet<String>),
}

#[derive(Debug, Deserialize, Serialize, JsonSchema)]
#[serde(untagged)]
pub enum ToolApprovalPolicyConfig {
    String(String),             // "always_ask"
    Tagged(ToolApprovalPolicy), // Direct deserialization for tagged enum format
}

/// Overrides that can be applied from CLI arguments
#[derive(Debug, Default)]
pub struct SessionConfigOverrides {
    pub system_prompt: Option<String>,
    pub metadata: Option<String>,
}

/// Loads session configuration from files and applies overrides
pub struct SessionConfigLoader {
    config_path: Option<PathBuf>,
    overrides: SessionConfigOverrides,
}

impl SessionConfigLoader {
    pub fn new(config_path: Option<PathBuf>) -> Self {
        debug!("Loading session config from: {:?}", config_path);
        Self {
            config_path,
            overrides: SessionConfigOverrides::default(),
        }
    }

    pub fn with_overrides(mut self, overrides: SessionConfigOverrides) -> Self {
        self.overrides = overrides;
        self
    }

    pub async fn load(&self) -> Result<SessionConfig> {
        let mut config = if let Some(path) = &self.config_path {
            // Load from TOML file
            let content = fs::read_to_string(path)
                .await
                .with_context(|| format!("Failed to read config file: {}", path.display()))?;

            let partial: PartialSessionConfig = toml::from_str(&content)
                .with_context(|| format!("Failed to parse TOML config from: {}", path.display()))?;

            self.partial_to_full(partial)?
        } else {
            // Use defaults
            SessionConfig {
                workspace: WorkspaceConfig::default(),
                tool_config: SessionToolConfig::default(),
                system_prompt: None,
                metadata: HashMap::new(),
            }
        };

        self.apply_overrides(&mut config)?;
        self.validate_config(&config)?;

        Ok(config)
    }

    fn partial_to_full(&self, partial: PartialSessionConfig) -> Result<SessionConfig> {
        let workspace = match partial.workspace {
            Some(PartialWorkspaceConfig::Local { path }) => WorkspaceConfig::Local {
                path: path.unwrap_or_else(|| {
                    std::env::current_dir().unwrap_or_else(|_| PathBuf::from("."))
                }),
            },
            Some(PartialWorkspaceConfig::Remote {
                agent_address,
                auth,
            }) => WorkspaceConfig::Remote {
                agent_address,
                auth,
            },
            Some(PartialWorkspaceConfig::Container { image, runtime }) => {
                WorkspaceConfig::Container { image, runtime }
            }
            None => WorkspaceConfig::default(),
        };

        let tool_config = if let Some(partial_tool_config) = partial.tool_config {
            let backends = partial_tool_config.backends.unwrap_or_default();

            let visibility = match partial_tool_config.visibility {
                Some(ToolVisibilityConfig::String(s)) => match s.as_str() {
                    "all" => ToolVisibility::All,
                    "read_only" => ToolVisibility::ReadOnly,
                    _ => {
                        return Err(eyre::eyre!(
                            "Invalid visibility string: {}. Expected 'all' or 'read_only'",
                            s
                        ));
                    }
                },
                Some(ToolVisibilityConfig::Object(obj)) => match obj {
                    ToolVisibilityObject::Whitelist(tools) => ToolVisibility::Whitelist(tools),
                    ToolVisibilityObject::Blacklist(tools) => ToolVisibility::Blacklist(tools),
                },
                None => ToolVisibility::default(),
            };

            let approval_policy = match partial_tool_config.approval_policy {
                Some(ToolApprovalPolicyConfig::String(s)) => match s.as_str() {
                    "always_ask" => ToolApprovalPolicy::AlwaysAsk,
                    _ => {
                        return Err(eyre::eyre!(
                            "Invalid approval policy string: {}. Expected 'always_ask'",
                            s
                        ));
                    }
                },
                Some(ToolApprovalPolicyConfig::Tagged(policy)) => policy,
                None => ToolApprovalPolicy::AlwaysAsk,
            };

            // Process tool-specific configs
            let mut tools = HashMap::new();
            if let Some(partial_tools) = partial_tool_config.tools {
                for (tool_name, tool_config) in partial_tools {
                    match tool_config {
                        PartialToolSpecificConfig::Bash(bash_config) => {
                            if tool_name == "bash" {
                                tools.insert(
                                    "bash".to_string(),
                                    ToolSpecificConfig::Bash(BashToolConfig {
                                        approved_patterns: bash_config
                                            .approved_patterns
                                            .unwrap_or_default(),
                                    }),
                                );
                            }
                        }
                    }
                }
            }

            SessionToolConfig {
                backends,
                visibility,
                approval_policy,
                metadata: HashMap::new(),
                tools,
            }
        } else {
            SessionToolConfig::default()
        };

        debug!("Loaded tool config: {:?}", tool_config);

        Ok(SessionConfig {
            workspace,
            tool_config,
            system_prompt: partial.system_prompt,
            metadata: partial.metadata.unwrap_or_default(),
        })
    }

    fn apply_overrides(&self, config: &mut SessionConfig) -> Result<()> {
        // Apply system prompt override
        if let Some(system_prompt) = &self.overrides.system_prompt {
            config.system_prompt = Some(system_prompt.clone());
        }

        // Apply metadata overrides
        if let Some(metadata_str) = &self.overrides.metadata {
            let metadata = steer_core::utils::session::parse_metadata(Some(metadata_str))?;
            config.metadata.extend(metadata);
        }

        Ok(())
    }

    fn validate_config(&self, config: &SessionConfig) -> Result<(), SessionConfigError> {
        // Validate MCP backends have required fields
        for backend in &config.tool_config.backends {
            if let BackendConfig::Mcp {
                server_name,
                transport,
                ..
            } = backend
            {
                if server_name.is_empty() {
                    return Err(SessionConfigError::EmptyServerName);
                }

                // Validate transport-specific requirements
                match transport {
                    steer_core::tools::McpTransport::Stdio { command, .. } => {
                        if command.is_empty() {
                            return Err(SessionConfigError::EmptyStdioCommand);
                        }
                        // Check if command exists in PATH
                        if which::which(command).is_err() {
                            // Log warning but don't fail - the command might be a full path or available later
                            tracing::warn!(
                                "MCP command '{}' for server '{}' not found in PATH",
                                command,
                                server_name
                            );
                        }
                    }
                    steer_core::tools::McpTransport::Tcp { host, port } => {
                        if host.is_empty() {
                            return Err(SessionConfigError::EmptyTcpHost);
                        }
                        if *port == 0 {
                            return Err(SessionConfigError::InvalidTcpPort);
                        }
                    }
                    #[cfg(unix)]
                    steer_core::tools::McpTransport::Unix { path } => {
                        if path.is_empty() {
                            return Err(SessionConfigError::EmptyUnixPath);
                        }
                    }
                    steer_core::tools::McpTransport::Sse { url, .. } => {
                        if url.is_empty() {
                            return Err(SessionConfigError::EmptySseUrl);
                        }
                    }
                    steer_core::tools::McpTransport::Http { url, .. } => {
                        if url.is_empty() {
                            return Err(SessionConfigError::EmptyHttpUrl);
                        }
                    }
                }
            }
        }

        Ok(())
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use steer_core::session::ToolFilter;

    #[tokio::test]
    async fn test_backend_serialization() {
        // Test that we can serialize and deserialize BackendConfig
        let backend = BackendConfig::Mcp {
            server_name: "test".to_string(),
            transport: steer_core::tools::McpTransport::Stdio {
                command: "python".to_string(),
                args: vec!["-m".to_string(), "test".to_string()],
            },
            tool_filter: ToolFilter::All,
        };

        let json = serde_json::to_string(&backend).unwrap();
        println!("Backend JSON: {json}");

        let backend2: BackendConfig = serde_json::from_str(&json).unwrap();
        match backend2 {
            BackendConfig::Mcp {
                server_name,
                transport,
                ..
            } => {
                assert_eq!(server_name, "test");
                match transport {
                    steer_core::tools::McpTransport::Stdio { command, args } => {
                        assert_eq!(command, "python");
                        assert_eq!(args, vec!["-m", "test"]);
                    }
                    _ => unreachable!("Expected Stdio transport"),
                }
            }
            _ => unreachable!("Expected correct variant"),
        }
    }

    #[tokio::test]
    async fn test_partial_config_parsing() {
        // Test simple config without backends
        let toml_content = r#"
[tool_config]
visibility = "all"
approval_policy = "always_ask"
"#;

        let partial: PartialSessionConfig = toml::from_str(toml_content).unwrap();
        assert!(partial.tool_config.is_some());
    }

    #[tokio::test]
    async fn test_config_with_empty_backends() {
        // Test config with empty backends array
        let toml_content = r#"
[tool_config]
backends = []
visibility = "all"
"#;

        let partial: PartialSessionConfig = toml::from_str(toml_content).unwrap();
        assert!(partial.tool_config.is_some());

        let tool_config = partial.tool_config.unwrap();
        assert!(tool_config.backends.is_some());
        assert_eq!(tool_config.backends.unwrap().len(), 0);
    }

    #[tokio::test]
    async fn test_full_config_parsing() {
        let toml_content = r#"
system_prompt = "You are a helpful assistant."

[workspace]
type = "local"

[tool_config]
visibility = "read_only"

[metadata]
project = "my-project"
"#;

        let partial: PartialSessionConfig = toml::from_str(toml_content).unwrap();
        assert!(partial.workspace.is_some());
        assert!(partial.system_prompt.is_some());
        assert_eq!(
            partial.system_prompt.unwrap(),
            "You are a helpful assistant."
        );
        assert!(partial.metadata.is_some());
    }

    #[tokio::test]
    async fn test_config_loader() {
        let loader = SessionConfigLoader::new(None);
        let config = loader.load().await.unwrap();

        // Should get defaults
        assert!(matches!(config.workspace, WorkspaceConfig::Local { .. }));
        assert!(matches!(
            config.tool_config.approval_policy,
            ToolApprovalPolicy::AlwaysAsk
        ));
    }

    #[tokio::test]
    async fn test_config_loader_with_overrides() {
        let overrides = SessionConfigOverrides {
            system_prompt: Some("Custom prompt".to_string()),
            metadata: Some("key1=value1,key2=value2".to_string()),
        };

        let loader = SessionConfigLoader::new(None).with_overrides(overrides);
        let config = loader.load().await.unwrap();

        assert_eq!(config.system_prompt, Some("Custom prompt".to_string()));
        assert_eq!(config.metadata.get("key1"), Some(&"value1".to_string()));
    }

    #[tokio::test]
    async fn test_load_non_existent_file() {
        let loader = SessionConfigLoader::new(Some(PathBuf::from("/tmp/non_existent_file.toml")));
        let result = loader.load().await;

        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("Failed to read config file"));
    }

    #[tokio::test]
    async fn test_load_invalid_toml() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(temp_file, "invalid toml syntax {{").unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let result = loader.load().await;

        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("Failed to parse TOML config"));
    }

    #[tokio::test]
    async fn test_invalid_visibility_config() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[tool_config]
visibility = "invalid_value"
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let result = loader.load().await;

        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("Invalid visibility string"));
        assert!(err.to_string().contains("Expected 'all' or 'read_only'"));
    }

    #[tokio::test]
    async fn test_invalid_approval_policy_config() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[tool_config]
approval_policy = "invalid_policy"
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let result = loader.load().await;

        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("Invalid approval policy string"));
        assert!(err.to_string().contains("Expected 'always_ask'"));
    }

    #[tokio::test]
    async fn test_mcp_backend_validation_empty_server_name() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(temp_file, r#"
[tool_config]
backends = [
  {{ type = "mcp", server_name = "", transport = {{ type = "stdio", command = "python", args = ["-m", "test"] }}, tool_filter = "all" }}
]
"#).unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let result = loader.load().await;

        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(
            err.to_string()
                .contains("MCP backend server_name cannot be empty")
        );
    }

    #[tokio::test]
    async fn test_mcp_backend_validation_empty_command() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(temp_file, r#"
[tool_config]
backends = [
  {{ type = "mcp", server_name = "test", transport = {{ type = "stdio", command = "", args = ["-m", "test"] }}, tool_filter = "all" }}
]
"#).unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let result = loader.load().await;

        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(
            err.to_string()
                .contains("MCP stdio transport command cannot be empty")
        );
    }

    #[tokio::test]
    async fn test_file_config_with_cli_overrides() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        // Create a config file with initial values
        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
system_prompt = "Original prompt"

[tool_config]
visibility = "all"
approval_policy = "always_ask"

[metadata]
key1 = "original1"
key2 = "original2"
"#
        )
        .unwrap();

        // Apply CLI overrides
        let overrides = SessionConfigOverrides {
            system_prompt: Some("Overridden prompt".to_string()),
            metadata: Some("key2=overridden2,key3=new3".to_string()),
        };

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()))
            .with_overrides(overrides);
        let config = loader.load().await.unwrap();

        // Check that overrides were applied
        assert_eq!(config.system_prompt, Some("Overridden prompt".to_string()));

        // Check metadata was merged (key1 unchanged, key2 overridden, key3 added)
        assert_eq!(config.metadata.get("key1"), Some(&"original1".to_string()));
        assert_eq!(
            config.metadata.get("key2"),
            Some(&"overridden2".to_string())
        );
        assert_eq!(config.metadata.get("key3"), Some(&"new3".to_string()));

        // Visibility and approval policy should remain from file
        assert!(matches!(config.tool_config.visibility, ToolVisibility::All));
        assert!(matches!(
            config.tool_config.approval_policy,
            ToolApprovalPolicy::AlwaysAsk
        ));
    }

    #[tokio::test]
    async fn test_complex_tool_visibility_whitelist() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[tool_config]
visibility = {{ whitelist = ["grep", "ls", "view"] }}
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let config = loader.load().await.unwrap();

        match &config.tool_config.visibility {
            ToolVisibility::Whitelist(tools) => {
                assert_eq!(tools.len(), 3);
                assert!(tools.contains("grep"));
                assert!(tools.contains("ls"));
                assert!(tools.contains("view"));
            }
            _ => unreachable!("Expected Whitelist visibility"),
        }
    }

    #[tokio::test]
    async fn test_complex_tool_visibility_blacklist() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[tool_config]
visibility = {{ blacklist = ["bash", "edit_file"] }}
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let config = loader.load().await.unwrap();

        match &config.tool_config.visibility {
            ToolVisibility::Blacklist(tools) => {
                assert_eq!(tools.len(), 2);
                assert!(tools.contains("bash"));
                assert!(tools.contains("edit_file"));
            }
            _ => unreachable!("Expected Blacklist visibility"),
        }
    }

    #[tokio::test]
    async fn test_workspace_remote_config() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[workspace]
type = "remote"
agent_address = "192.168.1.100:50051"
auth = {{ Bearer = {{ token = "secret-token" }} }}
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let config = loader.load().await.unwrap();

        match &config.workspace {
            WorkspaceConfig::Remote {
                agent_address,
                auth,
            } => {
                assert_eq!(agent_address, "192.168.1.100:50051");
                assert!(auth.is_some());
                match auth.as_ref().unwrap() {
                    RemoteAuth::Bearer { token } => {
                        assert_eq!(token, "secret-token");
                    }
                    _ => unreachable!("Expected Bearer auth"),
                }
            }
            _ => unreachable!("Expected Remote workspace"),
        }
    }

    #[tokio::test]
    async fn test_bash_tool_config_with_approved_patterns() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[tool_config.tools.bash]
approved_patterns = [
    "git status",
    "git log*",
    "npm run*",
    "cargo build*"
]
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let config = loader.load().await.unwrap();

        // Check that bash tool config was parsed correctly
        let bash_config = config.tool_config.tools.get("bash");
        assert!(bash_config.is_some(), "Bash config should be present");

        match bash_config.unwrap() {
            ToolSpecificConfig::Bash(bash) => {
                assert_eq!(bash.approved_patterns.len(), 4);
                assert_eq!(bash.approved_patterns[0], "git status");
                assert_eq!(bash.approved_patterns[1], "git log*");
                assert_eq!(bash.approved_patterns[2], "npm run*");
                assert_eq!(bash.approved_patterns[3], "cargo build*");
            }
        }
    }

    #[tokio::test]
    async fn test_bash_tool_config_empty_patterns() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[tool_config.tools.bash]
approved_patterns = []
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let config = loader.load().await.unwrap();

        let bash_config = config.tool_config.tools.get("bash");
        assert!(bash_config.is_some());

        match bash_config.unwrap() {
            ToolSpecificConfig::Bash(bash) => {
                assert_eq!(bash.approved_patterns.len(), 0);
            }
        }
    }

    #[tokio::test]
    async fn test_bash_tool_config_with_other_tools() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[tool_config]
visibility = "all"
approval_policy = "always_ask"

[tool_config.tools.bash]
approved_patterns = ["ls -la", "pwd"]
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let config = loader.load().await.unwrap();

        // Check visibility and approval policy
        assert!(matches!(config.tool_config.visibility, ToolVisibility::All));
        assert!(matches!(
            config.tool_config.approval_policy,
            ToolApprovalPolicy::AlwaysAsk
        ));

        // Check bash config
        let bash_config = config.tool_config.tools.get("bash");
        assert!(bash_config.is_some());

        match bash_config.unwrap() {
            ToolSpecificConfig::Bash(bash) => {
                assert_eq!(bash.approved_patterns.len(), 2);
                assert_eq!(bash.approved_patterns[0], "ls -la");
                assert_eq!(bash.approved_patterns[1], "pwd");
            }
        }
    }

    #[tokio::test]
    async fn test_bash_tool_config_without_approved_patterns() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
[tool_config.tools.bash]
# No approved_patterns field
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let config = loader.load().await.unwrap();

        let bash_config = config.tool_config.tools.get("bash");
        assert!(bash_config.is_some());

        match bash_config.unwrap() {
            ToolSpecificConfig::Bash(bash) => {
                // Should default to empty vec when approved_patterns is None
                assert_eq!(bash.approved_patterns.len(), 0);
            }
        }
    }

    #[tokio::test]
    async fn test_full_config_with_bash_patterns() {
        use std::io::Write;
        use tempfile::NamedTempFile;

        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(
            temp_file,
            r#"
system_prompt = "You are a helpful assistant"

[workspace]
type = "local"

[tool_config]
visibility = "all"
approval_policy = {{ type = "pre_approved", tools = ["grep", "ls", "view"] }}
backends = []

[tool_config.tools.bash]
approved_patterns = [
    "git status",
    "git diff",
    "git log --oneline",
    "npm test",
    "cargo check"
]

[metadata]
project = "test-project"
"#
        )
        .unwrap();

        let loader = SessionConfigLoader::new(Some(temp_file.path().to_path_buf()));
        let config = loader.load().await.unwrap();

        // Check all parts of the config
        assert_eq!(
            config.system_prompt,
            Some("You are a helpful assistant".to_string())
        );
        assert!(matches!(config.workspace, WorkspaceConfig::Local { .. }));
        assert_eq!(
            config.metadata.get("project"),
            Some(&"test-project".to_string())
        );

        // Check tool approval policy
        match &config.tool_config.approval_policy {
            ToolApprovalPolicy::PreApproved { tools } => {
                assert_eq!(tools.len(), 3);
                assert!(tools.contains("grep"));
                assert!(tools.contains("ls"));
                assert!(tools.contains("view"));
            }
            _ => unreachable!("Expected PreApproved policy"),
        }

        // Check bash config
        let bash_config = config.tool_config.tools.get("bash");
        assert!(bash_config.is_some());

        match bash_config.unwrap() {
            ToolSpecificConfig::Bash(bash) => {
                assert_eq!(bash.approved_patterns.len(), 5);
                assert_eq!(bash.approved_patterns[0], "git status");
                assert_eq!(bash.approved_patterns[1], "git diff");
                assert_eq!(bash.approved_patterns[2], "git log --oneline");
                assert_eq!(bash.approved_patterns[3], "npm test");
                assert_eq!(bash.approved_patterns[4], "cargo check");
            }
        }
    }
}