mod core;
use core::{
    app::commands::get_jan_data_folder_path,
    downloads::models::DownloadManagerState,
    mcp::helpers::clean_up_mcp_servers,
    setup::{self, setup_mcp},
    state::AppState,
};
use jan_utils::generate_app_token;
use std::{collections::HashMap, sync::Arc};
use tauri::{Emitter, Manager, RunEvent};
use tauri_plugin_llamacpp::cleanup_llama_processes;
use tokio::sync::Mutex;

#[cfg_attr(all(mobile, any(target_os = "android", target_os = "ios")), tauri::mobile_entry_point)]
pub fn run() {
    let mut builder = tauri::Builder::default();
    #[cfg(desktop)]
    {
        builder = builder.plugin(tauri_plugin_single_instance::init(|_app, argv, _cwd| {
          println!("a new app instance was opened with {argv:?} and the deep link event was already triggered");
          // when defining deep link schemes at runtime, you must also check `argv` here
        }));
    }

    let mut app_builder = builder
        .plugin(tauri_plugin_os::init())
        .plugin(tauri_plugin_dialog::init())
        .plugin(tauri_plugin_opener::init())
        .plugin(tauri_plugin_http::init())
        .plugin(tauri_plugin_store::Builder::new().build())
        .plugin(tauri_plugin_shell::init())
        .plugin(tauri_plugin_llamacpp::init());

    #[cfg(feature = "deep-link")]
    {
        app_builder = app_builder.plugin(tauri_plugin_deep_link::init());
    }

    #[cfg(not(any(target_os = "android", target_os = "ios")))]
    {
        app_builder = app_builder.plugin(tauri_plugin_hardware::init());
    }

    let app = app_builder
        .invoke_handler(tauri::generate_handler![
            // FS commands - Deperecate soon
            core::filesystem::commands::join_path,
            core::filesystem::commands::mkdir,
            core::filesystem::commands::exists_sync,
            core::filesystem::commands::readdir_sync,
            core::filesystem::commands::read_file_sync,
            core::filesystem::commands::rm,
            core::filesystem::commands::file_stat,
            core::filesystem::commands::write_file_sync,
            core::filesystem::commands::write_yaml,
            core::filesystem::commands::read_yaml,
            core::filesystem::commands::decompress,
            // App configuration commands
            core::app::commands::get_app_configurations,
            core::app::commands::get_user_home_path,
            core::app::commands::update_app_configuration,
            core::app::commands::get_jan_data_folder_path,
            core::app::commands::get_configuration_file_path,
            core::app::commands::default_data_folder_path,
            core::app::commands::change_app_data_folder,
            core::app::commands::app_token,
            // Extension commands
            core::extensions::commands::get_jan_extensions_path,
            core::extensions::commands::install_extensions,
            core::extensions::commands::get_active_extensions,
            // System commands
            core::system::commands::relaunch,
            core::system::commands::open_app_directory,
            core::system::commands::open_file_explorer,
            core::system::commands::factory_reset,
            core::system::commands::read_logs,
            core::system::commands::is_library_available,
            // Server commands
            core::server::commands::start_server,
            core::server::commands::stop_server,
            core::server::commands::get_server_status,
            // MCP commands
            core::mcp::commands::get_tools,
            core::mcp::commands::call_tool,
            core::mcp::commands::cancel_tool_call,
            core::mcp::commands::restart_mcp_servers,
            core::mcp::commands::get_connected_servers,
            core::mcp::commands::save_mcp_configs,
            core::mcp::commands::get_mcp_configs,
            core::mcp::commands::activate_mcp_server,
            core::mcp::commands::deactivate_mcp_server,
            core::mcp::commands::reset_mcp_restart_count,
            // Threads
            core::threads::commands::list_threads,
            core::threads::commands::create_thread,
            core::threads::commands::modify_thread,
            core::threads::commands::delete_thread,
            core::threads::commands::list_messages,
            core::threads::commands::create_message,
            core::threads::commands::modify_message,
            core::threads::commands::delete_message,
            core::threads::commands::get_thread_assistant,
            core::threads::commands::create_thread_assistant,
            core::threads::commands::modify_thread_assistant,
            // Download
            core::downloads::commands::download_files,
            core::downloads::commands::cancel_download_task,
        ])
        .manage(AppState {
            app_token: Some(generate_app_token()),
            mcp_servers: Arc::new(Mutex::new(HashMap::new())),
            download_manager: Arc::new(Mutex::new(DownloadManagerState::default())),
            mcp_restart_counts: Arc::new(Mutex::new(HashMap::new())),
            mcp_active_servers: Arc::new(Mutex::new(HashMap::new())),
            mcp_successfully_connected: Arc::new(Mutex::new(HashMap::new())),
            server_handle: Arc::new(Mutex::new(None)),
            tool_call_cancellations: Arc::new(Mutex::new(HashMap::new())),
        })
        .setup(|app| {
            app.handle().plugin(
                tauri_plugin_log::Builder::default()
                    .level(log::LevelFilter::Debug)
                    .targets([
                        tauri_plugin_log::Target::new(tauri_plugin_log::TargetKind::Stdout),
                        tauri_plugin_log::Target::new(tauri_plugin_log::TargetKind::Webview),
                        tauri_plugin_log::Target::new(tauri_plugin_log::TargetKind::Folder {
                            path: get_jan_data_folder_path(app.handle().clone()).join("logs"),
                            file_name: Some("app".to_string()),
                        }),
                    ])
                    .build(),
            )?;
            #[cfg(not(any(target_os = "ios", target_os = "android")))]
            app.handle().plugin(tauri_plugin_updater::Builder::new().build())?;
            // Install extensions
            if let Err(e) = setup::install_extensions(app.handle().clone(), false) {
                log::error!("Failed to install extensions: {}", e);
            }

            #[cfg(all(feature = "deep-link", any(windows, target_os = "linux")))]
            {
                use tauri_plugin_deep_link::DeepLinkExt;
                // Register the deep-link scheme programmatically
                app.deep_link().register("jan")?;
            }
            setup_mcp(app);
            Ok(())
        })
        .build(tauri::generate_context!())
        .expect("error while running tauri application");

    // Handle app lifecycle events
    app.run(|app, event| match event {
        RunEvent::Exit => {
            // This is called when the app is actually exiting (e.g., macOS dock quit)
            // We can't prevent this, so run cleanup quickly
            let app_handle = app.clone();
            tokio::task::block_in_place(|| {
                tauri::async_runtime::block_on(async {
                    // Hide window immediately (not available on mobile platforms)
                    if let Some(window) = app_handle.get_webview_window("main") {
                        #[cfg(not(any(target_os = "ios", target_os = "android")))]
                        { let _ = window.hide(); }
                        let _ = window.emit("kill-mcp-servers", ());
                    }

                    // Quick cleanup with shorter timeout
                    let state = app_handle.state::<AppState>();
                    let _ = clean_up_mcp_servers(state).await;
                    let _ = cleanup_llama_processes(app.clone()).await;
                });
            });
        }
        _ => {}
    });
}