//
//  MacApp.swift
//  MacBackend
//
//  Created by david-swift on 31.07.2024.
//

import AppKit
@_exported import Meta
@_exported import MetaSQLite

/// The Meta app storage for the macOS backend.
public class MacApp: AppStorage {

    /// The scene element type of the macOS backend.
    public typealias SceneElementType = MacSceneElement

    /// The app storage.
    public var storage: StandardAppStorage = .init()
    /// The application.
    let app = NSApplication.shared
    /// The menu bar.
    let mainMenu = NSMenu()
    /// The "<App>" menu.
    let appItem = NSMenuItem(title: "", action: nil, keyEquivalent: "")
    /// The "Window" menu.
    let windowsItem = NSMenuItem(title: "Window", action: nil, keyEquivalent: "")
    /// The "Help" menu.
    let helpItem = NSMenuItem(title: "Help", action: nil, keyEquivalent: "")

    /// Initialize the app storage.
    /// - Parameter id: The identifier.
    public init(id: String) {
        app.mainMenu = mainMenu
        DatabaseInformation.setPath(
            URL.applicationSupportDirectory
                .appendingPathComponent(id)
                .appendingPathComponent("database.sqlite")
                .path
        )
    }

    /// The app menu.
    func appMenu() {
        let appMenu = NSMenu()
        mainMenu.addItem(appItem)
        appItem.submenu = appMenu
    }

    /// The windows menu.
    func windowsMenu() {
        let windowsMenu = NSMenu()
        windowsItem.submenu = windowsMenu
        app.windowsMenu = windowsMenu
    }

    /// The help menu.
    func helpMenu() {
        let helpMenu = NSMenu()
        helpItem.submenu = helpMenu
        app.helpMenu = helpMenu
    }

    /// Add the windows and help menus.
    func addMenus() {
        mainMenu.addItem(windowsItem)
        mainMenu.addItem(helpItem)
    }

    /// Execute the app.
    /// - Parameter setup: Set the scene elements up.
    public func run(setup: @escaping () -> Void) {
        appMenu()
        windowsMenu()
        helpMenu()
        setup()
        addMenus()
        app.run()
    }

    /// Present the about window.
    public func showAboutWindow() {
        app.orderFrontStandardAboutPanel()
    }

    /// Quit the app.
    @objc
    public func quit() {
        app.terminate(nil)
    }

    /// Hide the app.
    public func hide() {
        app.hide(nil)
    }

    /// Hide other apps.
    public func hideOthers() {
        app.hideOtherApplications(nil)
    }

    /// Show all the apps.
    public func showAll() {
        app.unhideAllApplications(nil)
    }

}