wtg_cli/

output.rs

use std::collections::HashSet;

use crossterm::style::Stylize;
use octocrab::models::IssueState;

use crate::error::WtgResult;
use crate::git::{CommitInfo, TagInfo};
use crate::github::PullRequestInfo;
use crate::notice::Notice;
use crate::release_filter::ReleaseFilter;
use crate::remote::{RemoteHost, RemoteInfo};
use crate::resolution::{
    ChangesSource, EnrichedInfo, EntryPoint, FileResult, IdentifiedThing, IssueInfo, TagResult,
};

pub fn display(thing: IdentifiedThing, filter: &ReleaseFilter) -> WtgResult<()> {
    match thing {
        IdentifiedThing::Enriched(info) => display_enriched(*info, filter),
        IdentifiedThing::File(file_result) => display_file(*file_result, filter),
        IdentifiedThing::Tag(tag_result) => display_tag(&tag_result),
    }

    Ok(())
}

/// Display tag information with changes from best available source
fn display_tag(result: &TagResult) {
    let tag = &result.tag_info;

    // Header
    println!("{} {}", "🏷️  Tag:".green().bold(), tag.name.as_str().cyan());
    println!(
        "{} {}",
        "📅 Created:".yellow(),
        tag.created_at.format("%Y-%m-%d").to_string().dark_grey()
    );

    // URL - prefer release URL if available
    if let Some(url) = tag.release_url.as_ref().or(result.github_url.as_ref()) {
        println!(
            "{} {}",
            "🔗 Release:".blue(),
            url.as_str().blue().underlined()
        );
    }

    println!();

    // Changes section
    if let Some(source) = &result.changes_source {
        let source_label = match source {
            ChangesSource::GitHubRelease => "(from GitHub release)".to_string(),
            ChangesSource::Changelog => "(from CHANGELOG)".to_string(),
            ChangesSource::Commits { previous_tag } => {
                format!("(commits since {previous_tag})")
            }
        };

        println!(
            "{} {}",
            "Changes".magenta().bold(),
            source_label.as_str().dark_grey()
        );

        match source {
            ChangesSource::Commits { .. } => {
                // Display commits as bullet list
                for commit in &result.commits {
                    println!(
                        "• {} {}",
                        commit.short_hash.as_str().cyan(),
                        commit.message.as_str().white()
                    );
                }
            }
            _ => {
                // Display text content
                if let Some(content) = &result.changes {
                    for line in content.lines() {
                        println!("{line}");
                    }
                }
            }
        }

        // Truncation notice
        if result.truncated_lines > 0 {
            if let Some(url) = tag.release_url.as_ref().or(result.github_url.as_ref()) {
                println!(
                    "{}",
                    format!(
                        "... {} more lines (see full release at {})",
                        result.truncated_lines, url
                    )
                    .as_str()
                    .dark_grey()
                    .italic()
                );
            } else {
                println!(
                    "{}",
                    format!("... {} more lines", result.truncated_lines)
                        .as_str()
                        .dark_grey()
                        .italic()
                );
            }
        }
    } else {
        // No changes available - just show the tag exists
        println!(
            "{}",
            "No release notes, changelog entry, or previous tag found."
                .dark_grey()
                .italic()
        );
    }
}

/// Display enriched info - the main display logic
/// Order depends on what the user searched for
fn display_enriched(info: EnrichedInfo, filter: &ReleaseFilter) {
    match &info.entry_point {
        EntryPoint::IssueNumber(_) => {
            // User searched for issue - lead with issue
            display_identification(&info.entry_point);
            println!();

            if let Some(issue) = &info.issue {
                display_issue_section(issue);
                println!();
            }

            if let Some(pr) = &info.pr {
                display_pr_section(pr, true); // true = show as "the fix"
                println!();
            }

            if let Some(commit_info) = info.commit.as_ref() {
                display_commit_section(commit_info, info.pr.as_ref());
                println!();
            }

            display_missing_info(&info);

            if info.commit.is_some() {
                display_release_info(info.release, filter);
            }
        }
        EntryPoint::PullRequestNumber(_) => {
            // User searched for PR - lead with PR
            display_identification(&info.entry_point);
            println!();

            if let Some(pr) = &info.pr {
                display_pr_section(pr, false); // false = not a fix, just a PR
                println!();
            }

            if let Some(commit_info) = info.commit.as_ref() {
                display_commit_section(commit_info, info.pr.as_ref());
                println!();
            }

            display_missing_info(&info);

            if info.commit.is_some() {
                display_release_info(info.release, filter);
            }
        }
        _ => {
            // User searched for commit or something else - lead with commit
            display_identification(&info.entry_point);
            println!();

            if let Some(commit_info) = info.commit.as_ref() {
                display_commit_section(commit_info, info.pr.as_ref());
                println!();
            }

            if let Some(pr) = &info.pr {
                display_pr_section(pr, false);
                println!();
            }

            if let Some(issue) = &info.issue {
                display_issue_section(issue);
                println!();
            }

            display_missing_info(&info);

            if info.commit.is_some() {
                display_release_info(info.release, filter);
            }
        }
    }
}

/// Display what the user searched for
fn display_identification(entry_point: &EntryPoint) {
    match entry_point {
        EntryPoint::Commit(hash) => {
            println!(
                "{} {}",
                "🔍 Found commit:".green().bold(),
                hash.as_str().cyan()
            );
        }
        EntryPoint::PullRequestNumber(num) => {
            println!(
                "{} #{}",
                "🔀 Found PR:".green().bold(),
                num.to_string().cyan()
            );
        }
        EntryPoint::IssueNumber(num) => {
            println!(
                "{} #{}",
                "🐛 Found issue:".green().bold(),
                num.to_string().cyan()
            );
        }
        EntryPoint::FilePath { branch, path } => {
            println!(
                "{} {}@{}",
                "📄 Found file:".green().bold(),
                path.as_str().cyan(),
                branch.clone().cyan()
            );
        }
        EntryPoint::Tag(tag) => {
            println!(
                "{} {}",
                "🏷️  Found tag:".green().bold(),
                tag.as_str().cyan()
            );
        }
    }
}

/// Display commit information (the core section, always present when resolved)
fn display_commit_section(commit_info: &CommitInfo, pr: Option<&PullRequestInfo>) {
    let commit_url = commit_info.commit_url.as_deref();
    let author_url = commit_info.author_url.as_deref();

    println!("{}", "💻 The Commit:".cyan().bold());
    println!(
        "   {} {}",
        "Hash:".yellow(),
        commit_info.short_hash.as_str().cyan()
    );

    // Show commit author
    print_author_subsection(
        "Who wrote this gem:",
        &commit_info.author_name,
        commit_info
            .author_login
            .as_deref()
            .or(commit_info.author_email.as_deref()),
        author_url,
    );

    // Show commit message if not a PR
    if pr.is_none() {
        print_message_with_essay_joke(&commit_info.message, None, commit_info.message_lines);
    }

    println!(
        "   {} {}",
        "📅".yellow(),
        commit_info
            .date
            .format("%Y-%m-%d %H:%M:%S")
            .to_string()
            .dark_grey()
    );

    if let Some(url) = commit_url {
        print_link(url);
    }
}

/// Display PR information (enrichment layer 1)
fn display_pr_section(pr: &PullRequestInfo, is_fix: bool) {
    println!("{}", "🔀 The Pull Request:".magenta().bold());
    println!(
        "   {} #{}",
        "Number:".yellow(),
        pr.number.to_string().cyan()
    );

    // PR author - different wording if this is shown as "the fix" for an issue
    if let Some(author) = &pr.author {
        let header = if is_fix {
            "Who's brave:"
        } else {
            "Who merged this beauty:"
        };
        print_author_subsection(header, author, None, pr.author_url.as_deref());
    }

    // PR description (overrides commit message)
    print_message_with_essay_joke(&pr.title, pr.body.as_deref(), pr.title.lines().count());

    // Merge status
    if let Some(merge_sha) = &pr.merge_commit_sha {
        println!("   {} {}", "✅ Merged:".green(), merge_sha[..7].cyan());
    } else {
        println!("   {}", "❌ Not merged yet".yellow().italic());
    }

    print_link(&pr.url);
}

/// Display issue information (enrichment layer 2)
fn display_issue_section(issue: &IssueInfo) {
    println!("{}", "🐛 The Issue:".red().bold());
    println!(
        "   {} #{}",
        "Number:".yellow(),
        issue.number.to_string().cyan()
    );

    // Issue author
    if let Some(author) = &issue.author {
        print_author_subsection(
            "Who spotted the trouble:",
            author,
            None,
            issue.author_url.as_deref(),
        );
    }

    // Issue description
    print_message_with_essay_joke(
        &issue.title,
        issue.body.as_deref(),
        issue.title.lines().count(),
    );

    print_link(&issue.url);
}

/// Display missing information (graceful degradation)
fn display_missing_info(info: &EnrichedInfo) {
    // Issue without PR
    if let Some(issue) = info.issue.as_ref()
        && info.pr.is_none()
    {
        let message = if info.commit.is_none() {
            if issue.state == IssueState::Closed {
                "🔍 Issue closed, but the trail's cold. Some stealthy hero dropped a fix and vanished without a PR."
            } else {
                "🔍 Couldn't trace this issue, still open. Waiting for a brave soul to pick it up..."
            }
        } else if issue.state == IssueState::Closed {
            "🤷 Issue closed, but no PR found... Some stealthy hero dropped a fix and vanished without a PR."
        } else {
            "🤷 No PR found for this issue... still hunting for the fix!"
        };
        println!("{}", message.yellow().italic());
        if issue.timeline_may_be_incomplete {
            println!(
                "{}",
                "   (Timeline data may be incomplete - we might be missing cross-project refs. Check your token access!)"
                    .yellow()
                    .italic()
            );
        }
        println!();
    }

    // Warning: timeline may be incomplete even when a PR was found
    if let Some(issue) = info.issue.as_ref()
        && info.pr.is_some()
        && issue.timeline_may_be_incomplete
    {
        println!(
            "{}",
            "⚠️  Timeline data may be incomplete - we might be missing cross-project refs. Check your token access!"
                .yellow()
                .italic()
        );
        println!();
    }

    // PR without commit (either not merged, or merged but from a cross-project ref we do not have access to)
    if let Some(pr_info) = info.pr.as_ref()
        && info.commit.is_none()
    {
        if pr_info.merged {
            println!(
                "{}",
                "⏳ PR merged, but alas, the commit is out of reach!"
                    .yellow()
                    .italic()
            );
        } else {
            println!(
                "{}",
                "⏳ This PR hasn't been merged yet, too scared to commit!"
                    .yellow()
                    .italic()
            );
        }
        println!();
    }
}

// Helper functions for consistent formatting

/// Print a clickable URL with consistent styling
fn print_link(url: &str) {
    println!("   {} {}", "🔗".blue(), url.blue().underlined());
}

/// Print author information as a subsection (indented)
fn print_author_subsection(
    header: &str,
    name: &str,
    email_or_username: Option<&str>,
    profile_url: Option<&str>,
) {
    println!("   {} {}", "👤".yellow(), header.dark_grey());

    if let Some(email_or_username) = email_or_username {
        println!("      {} ({})", name.cyan(), email_or_username.dark_grey());
    } else {
        println!("      {}", name.cyan());
    }

    if let Some(url) = profile_url {
        println!("      {} {}", "🔗".blue(), url.blue().underlined());
    }
}

/// Print a message/description with essay joke if it's long
fn print_message_with_essay_joke(first_line: &str, full_text: Option<&str>, line_count: usize) {
    println!("   {} {}", "📝".yellow(), first_line.white().bold());

    // Check if we should show the essay joke
    if let Some(text) = full_text {
        let char_count = text.len();

        // Show essay joke if >100 chars or multi-line
        if char_count > 100 || line_count > 1 {
            let extra_lines = line_count.saturating_sub(1);
            let message = if extra_lines > 0 {
                format!(
                    "Someone likes to write essays... {} more line{}",
                    extra_lines,
                    if extra_lines == 1 { "" } else { "s" }
                )
            } else {
                format!("Someone likes to write essays... {char_count} characters")
            };

            println!("      {} {}", "📚".yellow(), message.dark_grey().italic());
        }
    }
}

/// Display file information (special case)
fn display_file(file_result: FileResult, filter: &ReleaseFilter) {
    let info = file_result.file_info;

    println!("{} {}", "📄 Found file:".green().bold(), info.path.cyan());
    println!();

    // Display the commit section (consistent with PR/issue flow)
    display_commit_section(
        &info.last_commit,
        None, // Files don't have associated PRs
    );

    // Count how many times the last commit author appears in previous commits
    let last_author_name = &info.last_commit.author_name;
    let repeat_count = info
        .previous_authors
        .iter()
        .filter(|(_, name, _)| name == last_author_name)
        .count();

    // Add snarky comment if they're a repeat offender
    if repeat_count > 0 {
        let joke = match repeat_count {
            1 => format!(
                "   💀 {} can't stop touching this file... {} more time before this!",
                last_author_name.as_str().cyan(),
                repeat_count
            ),
            2 => format!(
                "   💀 {} really loves this file... {} more times before this!",
                last_author_name.as_str().cyan(),
                repeat_count
            ),
            3 => format!(
                "   💀 {} is obsessed... {} more times before this!",
                last_author_name.as_str().cyan(),
                repeat_count
            ),
            _ => format!(
                "   💀 {} REALLY needs to leave this alone... {} more times before this!",
                last_author_name.as_str().cyan(),
                repeat_count
            ),
        };
        println!("{}", joke.dark_grey().italic());
    }

    println!();

    // Previous authors - snarky hall of shame (deduplicated)
    if !info.previous_authors.is_empty() {
        // Deduplicate authors - track who we've seen
        let mut seen_authors = HashSet::new();
        seen_authors.insert(last_author_name.clone()); // Skip the last commit author

        let unique_authors: Vec<_> = info
            .previous_authors
            .iter()
            .enumerate()
            .filter(|(_, (_, name, _))| seen_authors.insert(name.clone()))
            .collect();

        if !unique_authors.is_empty() {
            let count = unique_authors.len();
            let header = if count == 1 {
                "👻 One ghost from the past:"
            } else {
                "👻 The usual suspects (who else touched this):"
            };
            println!("{}", header.yellow().bold());

            for (original_idx, (hash, name, _email)) in unique_authors {
                print!("   → {} • {}", hash.as_str().cyan(), name.as_str().cyan());

                if let Some(Some(url)) = file_result.author_urls.get(original_idx) {
                    print!(" {} {}", "🔗".blue(), url.as_str().blue().underlined());
                }

                println!();
            }

            println!();
        }
    }

    // Release info
    display_release_info(file_result.release, filter);
}

fn display_release_info(release: Option<TagInfo>, filter: &ReleaseFilter) {
    // Special messaging when checking a specific release
    if let Some(tag_name) = filter.specific_tag() {
        println!("{}", "📦 Release check:".magenta().bold());
        if let Some(tag) = release {
            println!(
                "   {} {}",
                "✅".green(),
                format!(
                    "Yep, it's in there! {} has got your commit covered.",
                    tag.name
                )
                .green()
                .bold()
            );
            // Use pre-computed tag_url (release URL for releases, tree URL for plain tags)
            if let Some(url) = &tag.tag_url {
                print_link(url);
            }
        } else {
            println!(
                "   {} {}",
                "❌".red(),
                format!("Nope! That commit missed the {tag_name} party.")
                    .yellow()
                    .italic()
            );
        }
        return;
    }

    // Standard release info display
    println!("{}", "📦 First shipped in:".magenta().bold());

    match release {
        Some(tag) => {
            // Display tag name (or release name if it's a GitHub release)
            if tag.is_release {
                if let Some(release_name) = &tag.release_name {
                    println!(
                        "   {} {} {}",
                        "🎉".yellow(),
                        release_name.as_str().cyan().bold(),
                        format!("({})", tag.name).as_str().dark_grey()
                    );
                } else {
                    println!("   {} {}", "🎉".yellow(), tag.name.as_str().cyan().bold());
                }

                // Show published date if available, fallback to tag date
                let published_or_created = tag.published_at.unwrap_or(tag.created_at);

                let date_part = published_or_created.format("%Y-%m-%d").to_string();
                println!("   {} {}", "📅".dark_grey(), date_part.dark_grey());
            } else {
                // Plain git tag
                println!("   {} {}", "🏷️ ".yellow(), tag.name.as_str().cyan().bold());
            }

            // Use pre-computed tag_url (release URL for releases, tree URL for plain tags)
            if let Some(url) = &tag.tag_url {
                print_link(url);
            }
        }
        None => {
            println!(
                "   {}",
                "🔥 Not shipped yet, still cooking in main!"
                    .yellow()
                    .italic()
            );
        }
    }
}

// ============================================
// Notice display
// ============================================

fn display_unsupported_host(remote: &RemoteInfo) {
    match remote.host {
        Some(RemoteHost::GitLab) => {
            eprintln!(
                "{}",
                "🦊 GitLab spotted! Living that self-hosted life, I see..."
                    .yellow()
                    .italic()
            );
        }
        Some(RemoteHost::Bitbucket) => {
            eprintln!(
                "{}",
                "🪣 Bitbucket, eh? Taking the scenic route!"
                    .yellow()
                    .italic()
            );
        }
        Some(RemoteHost::GitHub) => {
            // Shouldn't happen, but handle gracefully
            return;
        }
        None => {
            eprintln!(
                "{}",
                "🌐 A custom git remote? Look at you being all independent!"
                    .yellow()
                    .italic()
            );
        }
    }

    eprintln!(
        "{}",
        "   (I can only do GitHub API stuff, but let me show you local git info...)"
            .yellow()
            .italic()
    );
    eprintln!();
}

fn display_mixed_remotes(hosts: &[RemoteHost], count: usize) {
    let host_names: Vec<&str> = hosts
        .iter()
        .map(|h| match h {
            RemoteHost::GitHub => "GitHub",
            RemoteHost::GitLab => "GitLab",
            RemoteHost::Bitbucket => "Bitbucket",
        })
        .collect();

    eprintln!(
        "{}",
        format!(
            "🤯 Whoa, {} remotes pointing to {}? I'm getting dizzy!",
            count,
            host_names.join(", ")
        )
        .yellow()
        .italic()
    );
    eprintln!(
        "{}",
        "   (You've got quite the multi-cloud setup going on here...)"
            .yellow()
            .italic()
    );
    eprintln!(
        "{}",
        "   (I can only do GitHub API stuff, but let me show you local git info...)"
            .yellow()
            .italic()
    );
    eprintln!();
}

/// Print a notice to stderr.
/// All notices (both capability warnings and operational info) go through this function.
#[allow(clippy::too_many_lines)]
pub fn print_notice(notice: Notice) {
    match notice {
        // --- Backend capability notices ---
        Notice::NoRemotes => {
            eprintln!(
                "{}",
                "🤐 No remotes configured - what are you hiding?"
                    .yellow()
                    .italic()
            );
            eprintln!(
                "{}",
                "   (Or maybe... go do some OSS? 👀)".yellow().italic()
            );
            eprintln!();
        }
        Notice::UnsupportedHost { ref best_remote } => {
            display_unsupported_host(best_remote);
        }
        Notice::MixedRemotes { ref hosts, count } => {
            display_mixed_remotes(hosts, count);
        }
        Notice::UnreachableGitHub { ref remote } => {
            eprintln!(
                "{}",
                "🔑 Found a GitHub remote, but can't talk to the API..."
                    .yellow()
                    .italic()
            );
            eprintln!(
                "{}",
                format!(
                    "   Remote '{}' points to GitHub, but no luck connecting.",
                    remote.name
                )
                .yellow()
                .italic()
            );
            eprintln!(
                "{}",
                "   (Missing token? Network hiccup? I'll work with what I've got!)"
                    .yellow()
                    .italic()
            );
            eprintln!();
        }
        Notice::ApiOnly => {
            eprintln!(
                "{}",
                "📡 Using GitHub API only (local git unavailable)"
                    .yellow()
                    .italic()
            );
            eprintln!(
                "{}",
                "   (Some operations may be slower or limited)"
                    .yellow()
                    .italic()
            );
            eprintln!();
        }

        // --- Operational notices ---
        Notice::CloningRepo { url } => {
            eprintln!("🔄 Cloning remote repository {url}...");
        }
        Notice::CloneSucceeded { used_filter } => {
            if used_filter {
                eprintln!("✅ Repository cloned successfully (using filter)");
            } else {
                eprintln!("✅ Repository cloned successfully (using bare clone)");
            }
        }
        Notice::CloneFallbackToBare { error } => {
            eprintln!("⚠️  Filter clone failed ({error}), falling back to bare clone...");
        }
        Notice::CacheUpdateFailed { error } => {
            eprintln!("⚠️  Failed to update cached repo: {error}");
        }
        Notice::ShallowRepoDetected => {
            eprintln!(
                "⚠️  Shallow repository detected: using API for commit lookup (use --fetch to override)"
            );
        }
        Notice::UpdatingCache => {
            eprintln!("🔄 Updating cached repository...");
        }
        Notice::CacheUpdated => {
            eprintln!("✅ Repository updated");
        }
        Notice::CrossProjectFallbackToApi { owner, repo, error } => {
            eprintln!(
                "⚠️  Cannot access git for {owner}/{repo}: {error}. Using API only for cross-project refs."
            );
        }
        Notice::GhRateLimitHit { authenticated } => {
            if authenticated {
                eprintln!(
                    "{}",
                    "🐌 Whoa there, speedster! GitHub says slow down..."
                        .yellow()
                        .italic()
                );
                eprintln!(
                    "{}",
                    "   (Even with a token, there are limits. Take a breather!)"
                        .yellow()
                        .italic()
                );
            } else {
                eprintln!(
                    "{}",
                    "🐌 GitHub's giving us the silent treatment (60 req/hr for strangers)..."
                        .yellow()
                        .italic()
                );
                eprintln!(
                    "{}",
                    "   (Set GITHUB_TOKEN and they'll be way more chatty - 5000 req/hr!)"
                        .yellow()
                        .italic()
                );
            }
        }
        Notice::GhAnonymousFallbackFailed { error } => {
            eprintln!(
                "{}",
                "🔑 Tried anonymous fallback, but GitHub wasn't having it..."
                    .yellow()
                    .italic()
            );
            eprintln!("{}", format!("   ({error})").yellow().italic());
            eprintln!(
                "{}",
                "   (Set GITHUB_TOKEN for more reliable access!)"
                    .yellow()
                    .italic()
            );
        }
        Notice::CrossProjectPrFetchFailed {
            owner,
            repo,
            pr_number,
            error,
        } => {
            eprintln!(
                "{}",
                format!(
                    "🔍 Spotted PR #{pr_number} in {owner}/{repo}, but it's playing hard to get..."
                )
                .yellow()
                .italic()
            );
            eprintln!("{}", format!("   ({error})").yellow().italic());
            eprintln!(
                "{}",
                "   (Cross-project sleuthing needs a GITHUB_TOKEN with access!)"
                    .yellow()
                    .italic()
            );
        }
    }
}