mod acp;
mod app_error;
mod commands;
mod db;
mod models;
mod network;
mod parsers;
mod process;
mod terminal;

use std::sync::atomic::{AtomicBool, Ordering};

use acp::manager::ConnectionManager;
use commands::{
    acp as acp_commands, conversations, folder_commands, folders, mcp as mcp_commands,
    system_settings, terminal as terminal_commands, windows,
};
use tauri::Manager;
use terminal::manager::TerminalManager;

static APP_QUITTING: AtomicBool = AtomicBool::new(false);

fn get_folder_id_from_url(window: &tauri::Window) -> Option<i32> {
    let webview = window.get_webview_window(window.label())?;
    let url = webview.url().ok()?;
    url.query_pairs()
        .find(|(key, _)| key == "id")
        .and_then(|(_, value)| value.parse::<i32>().ok())
}

#[cfg_attr(mobile, tauri::mobile_entry_point)]
pub fn run() {
    let _ = fix_path_env::fix();

    tauri::Builder::default()
        .plugin(tauri_plugin_window_state::Builder::new().build())
        .plugin(tauri_plugin_opener::init())
        .plugin(tauri_plugin_dialog::init())
        .plugin(tauri_plugin_updater::Builder::new().build())
        .plugin(tauri_plugin_process::init())
        .manage(ConnectionManager::new())
        .manage(TerminalManager::new())
        .manage(windows::SettingsWindowState::new())
        .manage(windows::CommitWindowState::new())
        .setup(|app| {
            let app_data_dir = app.path().app_data_dir()?;
            let app_version = env!("CARGO_PKG_VERSION");
            let database =
                tauri::async_runtime::block_on(db::init_database(&app_data_dir, app_version))
                    .map_err(|e| e.to_string())?;
            app.manage(database);

            // Restore and apply saved system proxy settings before any network operation.
            let db = app.state::<db::AppDatabase>();
            match tauri::async_runtime::block_on(system_settings::load_system_proxy_settings(
                &db.conn,
            )) {
                Ok(settings) => {
                    let _ = network::proxy::apply_system_proxy_settings(&settings);
                }
                Err(err) => {
                    eprintln!("[Settings] failed to load system proxy settings: {err}");
                }
            }

            // Restore previously open folders or show welcome
            let db = app.state::<db::AppDatabase>();
            let open_folders = tauri::async_runtime::block_on(
                db::service::folder_service::list_open_folders(&db.conn),
            )
            .unwrap_or_default();

            if open_folders.is_empty() {
                let _ = windows::open_welcome_window(app.handle());
            } else {
                for entry in &open_folders {
                    let label = format!("folder-{}", uuid::Uuid::new_v4());
                    let url = tauri::WebviewUrl::App(format!("folder?id={}", entry.id).into());
                    let builder = tauri::WebviewWindowBuilder::new(app, &label, url)
                        .title(&entry.name)
                        .inner_size(1260.0, 860.0)
                        .min_inner_size(900.0, 600.0);
                    let _ = windows::apply_platform_window_style(builder).build();
                }
            }

            Ok(())
        })
        .on_window_event(|window, event| {
            let label = window.label().to_string();

            if label == "settings"
                && matches!(
                    event,
                    tauri::WindowEvent::CloseRequested { .. } | tauri::WindowEvent::Destroyed
                )
            {
                let app = window.app_handle();
                if let Some(state) = app.try_state::<windows::SettingsWindowState>() {
                    windows::restore_windows_after_settings(&app, &state);
                }
            }

            if label.starts_with("commit-")
                && matches!(
                    event,
                    tauri::WindowEvent::CloseRequested { .. } | tauri::WindowEvent::Destroyed
                )
            {
                let app = window.app_handle();
                if let Some(state) = app.try_state::<windows::CommitWindowState>() {
                    windows::restore_window_after_commit(&app, &state, &label);
                }
            }

            if let tauri::WindowEvent::CloseRequested { .. } = event {
                if label.starts_with("folder-") {
                    let app = window.app_handle();
                    if let Some(cm) = app.try_state::<ConnectionManager>() {
                        let disconnected =
                            tauri::async_runtime::block_on(cm.disconnect_by_owner_window(&label));
                        eprintln!(
                            "[ACP] folder window closing label={} disconnected_connections={}",
                            label, disconnected
                        );
                    }

                    // Only mark folder as closed if user is closing individual window,
                    // not when the entire app is quitting (so folders reopen on next launch)
                    if !APP_QUITTING.load(Ordering::Relaxed) {
                        if let Some(folder_id) = get_folder_id_from_url(window) {
                            if let Some(db) = app.try_state::<db::AppDatabase>() {
                                let _ = tauri::async_runtime::block_on(
                                    db::service::folder_service::set_folder_open(
                                        &db.conn, folder_id, false,
                                    ),
                                );
                            }
                        }
                    }

                    // Kill terminal sessions owned by this folder window.
                    if let Some(tm) = app.try_state::<TerminalManager>() {
                        let killed = tm.kill_by_owner_window(&label);
                        eprintln!(
                            "[TERM] folder window closing label={} killed_terminals={}",
                            label, killed
                        );
                    }
                    let has_other_folder = app
                        .webview_windows()
                        .keys()
                        .any(|l| l.starts_with("folder-") && *l != label);
                    if !has_other_folder && !APP_QUITTING.load(Ordering::Relaxed) {
                        let _ = windows::open_welcome_window(app);
                    }
                }
            }
        })
        .invoke_handler(tauri::generate_handler![
            conversations::list_conversations,
            conversations::get_conversation,
            conversations::list_folder_conversations,
            conversations::import_local_conversations,
            conversations::get_folder_conversation,
            conversations::list_folders,
            conversations::get_stats,
            conversations::get_sidebar_data,
            conversations::create_conversation,
            conversations::update_conversation_status,
            conversations::update_conversation_title,
            conversations::update_conversation_external_id,
            conversations::delete_conversation,
            folders::load_folder_history,
            folders::get_folder,
            folders::add_folder_to_history,
            folders::set_folder_parent_branch,
            folders::remove_folder_from_history,
            folders::create_folder_directory,
            folders::clone_repository,
            folders::get_git_branch,
            folders::git_init,
            folders::git_pull,
            folders::git_fetch,
            folders::git_push,
            folders::git_new_branch,
            folders::git_worktree_add,
            folders::git_checkout,
            folders::git_list_branches,
            folders::git_stash,
            folders::git_stash_pop,
            folders::git_status,
            folders::git_is_tracked,
            folders::git_diff,
            folders::git_diff_with_branch,
            folders::git_show_diff,
            folders::git_show_file,
            folders::git_commit,
            folders::git_rollback_file,
            folders::git_add_files,
            folders::git_list_all_branches,
            folders::git_merge,
            folders::git_rebase,
            folders::git_delete_branch,
            folders::save_folder_opened_conversations,
            folders::start_file_tree_watch,
            folders::stop_file_tree_watch,
            folders::get_file_tree,
            folders::read_file_preview,
            folders::read_file_for_edit,
            folders::save_file_content,
            folders::save_file_copy,
            folders::rename_file_tree_entry,
            folders::delete_file_tree_entry,
            folders::git_log,
            folders::git_commit_branches,
            windows::open_folder_window,
            windows::open_commit_window,
            windows::open_settings_window,
            windows::list_open_folders,
            windows::focus_folder_window,
            system_settings::get_system_proxy_settings,
            system_settings::update_system_proxy_settings,
            system_settings::get_system_language_settings,
            system_settings::update_system_language_settings,
            acp_commands::acp_preflight,
            acp_commands::acp_connect,
            acp_commands::acp_prompt,
            acp_commands::acp_set_mode,
            acp_commands::acp_set_config_option,
            acp_commands::acp_cancel,
            acp_commands::acp_respond_permission,
            acp_commands::acp_disconnect,
            acp_commands::acp_list_connections,
            acp_commands::acp_list_agents,
            acp_commands::acp_clear_binary_cache,
            acp_commands::acp_download_agent_binary,
            acp_commands::acp_detect_agent_local_version,
            acp_commands::acp_prepare_npx_agent,
            acp_commands::acp_prepare_uvx_agent,
            acp_commands::acp_uninstall_agent,
            acp_commands::acp_update_agent_preferences,
            acp_commands::acp_reorder_agents,
            acp_commands::acp_list_agent_skills,
            acp_commands::acp_read_agent_skill,
            acp_commands::acp_save_agent_skill,
            acp_commands::acp_delete_agent_skill,
            folder_commands::list_folder_commands,
            folder_commands::create_folder_command,
            folder_commands::update_folder_command,
            folder_commands::delete_folder_command,
            folder_commands::reorder_folder_commands,
            folder_commands::bootstrap_folder_commands_from_package_json,
            terminal_commands::terminal_spawn,
            terminal_commands::terminal_write,
            terminal_commands::terminal_resize,
            terminal_commands::terminal_kill,
            terminal_commands::terminal_list,
            mcp_commands::mcp_scan_local,
            mcp_commands::mcp_list_marketplaces,
            mcp_commands::mcp_search_marketplace,
            mcp_commands::mcp_get_marketplace_server_detail,
            mcp_commands::mcp_install_from_marketplace,
            mcp_commands::mcp_upsert_local_server,
            mcp_commands::mcp_set_server_apps,
            mcp_commands::mcp_remove_server,
        ])
        .build(tauri::generate_context!())
        .expect("error while building tauri application")
        .run(|_app, event| {
            if let tauri::RunEvent::ExitRequested { .. } = event {
                APP_QUITTING.store(true, Ordering::Relaxed);
            }
        });
}