pub mod client;
pub mod config;
pub mod project;
pub mod tools;
pub mod tui;

use clap::Subcommand;
use tracing::info;

#[derive(Subcommand, Debug)]
pub enum CodeCommand {
    /// Start a coding session (default — can omit subcommand)
    Start {
        /// Model override (e.g., devstral-2)
        #[arg(long)]
        model: Option<String>,
        /// Sol gRPC endpoint (default: from sunbeam config)
        #[arg(long)]
        endpoint: Option<String>,
    },
    /// Demo the TUI with sample data (no Sol connection needed)
    #[command(hide = true)]
    Demo,
}

pub async fn cmd_code(cmd: Option<CodeCommand>) -> sunbeam_sdk::error::Result<()> {
    cmd_code_inner(cmd).await.map_err(|e| sunbeam_sdk::error::SunbeamError::Other(e.to_string()))
}

async fn cmd_code_inner(cmd: Option<CodeCommand>) -> anyhow::Result<()> {
    let cmd = cmd.unwrap_or(CodeCommand::Start {
        model: None,
        endpoint: None,
    });

    match cmd {
        CodeCommand::Demo => {
            return run_demo().await;
        }
        CodeCommand::Start { model, endpoint } => {
            let endpoint = endpoint.unwrap_or_else(|| "http://127.0.0.1:50051".into());

            // Discover project context
            let project = project::discover_project(".")?;
            info!(
                project = project.name.as_str(),
                path = project.path.as_str(),
                branch = project.git_branch.as_deref().unwrap_or("?"),
                "Discovered project"
            );

            // Load project config
            let cfg = config::load_project_config(&project.path);

            let model = model
                .or(cfg.model_name.clone())
                .unwrap_or_else(|| "devstral-small-2506".into());

            // Connect to Sol
            let mut session = client::connect(&endpoint, &project, &cfg, &model).await?;

            info!(
                session_id = session.session_id.as_str(),
                room_id = session.room_id.as_str(),
                model = session.model.as_str(),
                "Connected to Sol"
            );

            // TUI event loop
            use crossterm::event::{self, Event, KeyCode, KeyModifiers};

            let mut terminal = tui::setup_terminal()?;
            let branch = project.git_branch.as_deref().unwrap_or("?");
            let mut app = tui::App::new(&project.name, branch, &model);

            let result = loop {
                terminal.draw(|frame| tui::draw(frame, &app))?;

                if event::poll(std::time::Duration::from_millis(50))? {
                    if let Event::Key(key) = event::read()? {
                        match key.code {
                            KeyCode::Char('c') if key.modifiers.contains(KeyModifiers::CONTROL) => break Ok(()),
                            KeyCode::Char(c) => {
                                app.input.insert(app.cursor_pos, c);
                                app.cursor_pos += 1;
                            }
                            KeyCode::Backspace => {
                                if app.cursor_pos > 0 {
                                    app.cursor_pos -= 1;
                                    app.input.remove(app.cursor_pos);
                                }
                            }
                            KeyCode::Left => app.cursor_pos = app.cursor_pos.saturating_sub(1),
                            KeyCode::Right => app.cursor_pos = (app.cursor_pos + 1).min(app.input.len()),
                            KeyCode::Up => app.scroll_offset = app.scroll_offset.saturating_sub(1),
                            KeyCode::Down => app.scroll_offset = app.scroll_offset.saturating_add(1),
                            KeyCode::Enter => {
                                if !app.input.is_empty() {
                                    let text = app.input.clone();
                                    app.input.clear();
                                    app.cursor_pos = 0;

                                    if text == "/exit" {
                                        let _ = session.end().await;
                                        break Ok(());
                                    }

                                    app.push_log(tui::LogEntry::UserInput(text.clone()));
                                    app.is_thinking = true;

                                    // Force a redraw to show "thinking..."
                                    terminal.draw(|frame| tui::draw(frame, &app))?;

                                    match session.chat(&text).await {
                                        Ok(response) => {
                                            app.is_thinking = false;
                                            app.push_log(tui::LogEntry::AssistantText(response));
                                        }
                                        Err(e) => {
                                            app.is_thinking = false;
                                            app.push_log(tui::LogEntry::Error(e.to_string()));
                                        }
                                    }
                                }
                            }
                            _ => {}
                        }
                    }
                }
            };

            tui::restore_terminal(&mut terminal)?;
            result
        }
    }
}

async fn run_demo() -> anyhow::Result<()> {
    use crossterm::event::{self, Event, KeyCode, KeyModifiers};

    let mut terminal = tui::setup_terminal()?;
    let mut app = tui::App::new("sol", "mainline ±", "devstral-2");

    // Populate with sample conversation
    app.push_log(tui::LogEntry::UserInput("fix the token validation bug in auth.rs".into()));
    app.push_log(tui::LogEntry::AssistantText(
        "Looking at the auth module, I can see the issue on line 42 where the token \
         is not properly validated before use. The expiry check is missing entirely."
            .into(),
    ));
    app.push_log(tui::LogEntry::ToolSuccess {
        name: "file_read".into(),
        detail: "src/auth.rs (127 lines)".into(),
    });
    app.push_log(tui::LogEntry::ToolOutput {
        lines: vec![
            "38│ fn validate_token(token: &str) -> bool {".into(),
            "39│     let decoded = decode(token);".into(),
            "40│     // BUG: missing expiry check".into(),
            "41│     decoded.is_ok()".into(),
            "42│ }".into(),
            "43│".into(),
            "44│ fn refresh_token(token: &str) -> Result<String> {".into(),
            "45│     let client = reqwest::Client::new();".into(),
            "46│     // ...".into(),
        ],
        collapsed: true,
    });
    app.push_log(tui::LogEntry::ToolSuccess {
        name: "search_replace".into(),
        detail: "src/auth.rs — applied 1 replacement (line 41)".into(),
    });
    app.push_log(tui::LogEntry::ToolExecuting {
        name: "bash".into(),
        detail: "cargo test --lib".into(),
    });
    app.push_log(tui::LogEntry::ToolOutput {
        lines: vec![
            "running 23 tests".into(),
            "test auth::tests::test_validate_token ... ok".into(),
            "test auth::tests::test_expired_token ... ok".into(),
            "test auth::tests::test_refresh_flow ... ok".into(),
            "test result: ok. 23 passed; 0 failed".into(),
        ],
        collapsed: false,
    });
    app.push_log(tui::LogEntry::AssistantText(
        "Fixed. The token validation now checks expiry before use. All 23 tests pass."
            .into(),
    ));
    app.push_log(tui::LogEntry::UserInput("now add rate limiting to the auth endpoint".into()));
    app.push_log(tui::LogEntry::ToolExecuting {
        name: "file_read".into(),
        detail: "src/routes/auth.rs".into(),
    });
    app.is_thinking = true;
    app.input_tokens = 2400;
    app.output_tokens = 890;

    loop {
        terminal.draw(|frame| tui::draw(frame, &app))?;

        if event::poll(std::time::Duration::from_millis(100))? {
            if let Event::Key(key) = event::read()? {
                match key.code {
                    KeyCode::Char('c') if key.modifiers.contains(KeyModifiers::CONTROL) => break,
                    KeyCode::Char('q') => break,
                    KeyCode::Char(c) => {
                        app.input.insert(app.cursor_pos, c);
                        app.cursor_pos += 1;
                    }
                    KeyCode::Backspace => {
                        if app.cursor_pos > 0 {
                            app.cursor_pos -= 1;
                            app.input.remove(app.cursor_pos);
                        }
                    }
                    KeyCode::Left => {
                        app.cursor_pos = app.cursor_pos.saturating_sub(1);
                    }
                    KeyCode::Right => {
                        app.cursor_pos = (app.cursor_pos + 1).min(app.input.len());
                    }
                    KeyCode::Enter => {
                        if !app.input.is_empty() {
                            let text = app.input.clone();
                            app.input.clear();
                            app.cursor_pos = 0;

                            if text == "/exit" {
                                break;
                            }

                            app.push_log(tui::LogEntry::UserInput(text));
                            app.is_thinking = true;
                        }
                    }
                    KeyCode::Up => {
                        app.scroll_offset = app.scroll_offset.saturating_sub(1);
                    }
                    KeyCode::Down => {
                        app.scroll_offset = app.scroll_offset.saturating_add(1);
                    }
                    _ => {}
                }
            }
        }
    }

    tui::restore_terminal(&mut terminal)?;
    Ok(())
}