// Copyright 2019-2024 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

import {
  MenuItemOptions,
  SubmenuOptions,
  IconMenuItemOptions,
  PredefinedMenuItemOptions,
  CheckMenuItemOptions
} from '../menu'
import { MenuItem } from './menuItem'
import { CheckMenuItem } from './checkMenuItem'
import { IconMenuItem } from './iconMenuItem'
import { PredefinedMenuItem } from './predefinedMenuItem'
import { Submenu } from './submenu'
import { type LogicalPosition, PhysicalPosition } from '../dpi'
import { type Window } from '../window'
import { invoke } from '../core'
import { type ItemKind, MenuItemBase, newMenu } from './base'

function itemFromKind([rid, id, kind]: [number, string, ItemKind]):
  | Submenu
  | MenuItem
  | PredefinedMenuItem
  | CheckMenuItem
  | IconMenuItem {
  /* eslint-disable @typescript-eslint/no-unsafe-return */
  switch (kind) {
    case 'Submenu':
      // @ts-expect-error constructor is protected for external usage only
      return new Submenu(rid, id)
    case 'Predefined':
      // @ts-expect-error constructor is protected for external usage only
      return new PredefinedMenuItem(rid, id)
    case 'Check':
      // @ts-expect-error constructor is protected for external usage only
      return new CheckMenuItem(rid, id)
    case 'Icon':
      // @ts-expect-error constructor is protected for external usage only
      return new IconMenuItem(rid, id)
    case 'MenuItem':
    default:
      // @ts-expect-error constructor is protected for external usage only
      return new MenuItem(rid, id)
  }
  /* eslint-enable @typescript-eslint/no-unsafe-return */
}

/** Options for creating a new menu. */
export interface MenuOptions {
  /** Specify an id to use for the new menu. */
  id?: string
  /** List of items to add to the new menu. */
  items?: Array<
    | Submenu
    | MenuItem
    | PredefinedMenuItem
    | CheckMenuItem
    | IconMenuItem
    | MenuItemOptions
    | SubmenuOptions
    | IconMenuItemOptions
    | PredefinedMenuItemOptions
    | CheckMenuItemOptions
  >
}

/** A type that is either a menu bar on the window
 * on Windows and Linux or as a global menu in the menubar on macOS.
 */
export class Menu extends MenuItemBase {
  /** @ignore */
  protected constructor(rid: number, id: string) {
    super(rid, id, 'Menu')
  }

  /** Create a new menu. */
  static async new(opts?: MenuOptions): Promise<Menu> {
    return newMenu('Menu', opts).then(([rid, id]) => new Menu(rid, id))
  }

  /** Create a default menu. */
  static async default(): Promise<Menu> {
    return invoke<[number, string]>('plugin:menu|create_default').then(
      ([rid, id]) => new Menu(rid, id)
    )
  }

  /**
   * Add a menu item to the end of this menu.
   *
   * #### Platform-specific:
   *
   * - **macOS:** Only {@linkcode Submenu}s can be added to a {@linkcode Menu}.
   */
  async append<
    T extends
      | Submenu
      | MenuItem
      | PredefinedMenuItem
      | CheckMenuItem
      | IconMenuItem
      | MenuItemOptions
      | SubmenuOptions
      | IconMenuItemOptions
      | PredefinedMenuItemOptions
      | CheckMenuItemOptions
  >(items: T | T[]): Promise<void> {
    return invoke('plugin:menu|append', {
      rid: this.rid,
      kind: this.kind,
      items: (Array.isArray(items) ? items : [items]).map((i) =>
        'rid' in i ? [i.rid, i.kind] : i
      )
    })
  }

  /**
   * Add a menu item to the beginning of this menu.
   *
   * #### Platform-specific:
   *
   * - **macOS:** Only {@linkcode Submenu}s can be added to a {@linkcode Menu}.
   */
  async prepend<
    T extends
      | Submenu
      | MenuItem
      | PredefinedMenuItem
      | CheckMenuItem
      | IconMenuItem
      | MenuItemOptions
      | SubmenuOptions
      | IconMenuItemOptions
      | PredefinedMenuItemOptions
      | CheckMenuItemOptions
  >(items: T | T[]): Promise<void> {
    return invoke('plugin:menu|prepend', {
      rid: this.rid,
      kind: this.kind,
      items: (Array.isArray(items) ? items : [items]).map((i) =>
        'rid' in i ? [i.rid, i.kind] : i
      )
    })
  }

  /**
   * Add a menu item to the specified position in this menu.
   *
   * #### Platform-specific:
   *
   * - **macOS:** Only {@linkcode Submenu}s can be added to a {@linkcode Menu}.
   */
  async insert<
    T extends
      | Submenu
      | MenuItem
      | PredefinedMenuItem
      | CheckMenuItem
      | IconMenuItem
      | MenuItemOptions
      | SubmenuOptions
      | IconMenuItemOptions
      | PredefinedMenuItemOptions
      | CheckMenuItemOptions
  >(items: T | T[], position: number): Promise<void> {
    return invoke('plugin:menu|insert', {
      rid: this.rid,
      kind: this.kind,
      items: (Array.isArray(items) ? items : [items]).map((i) =>
        'rid' in i ? [i.rid, i.kind] : i
      ),
      position
    })
  }

  /** Remove a menu item from this menu. */
  async remove(
    item: Submenu | MenuItem | PredefinedMenuItem | CheckMenuItem | IconMenuItem
  ): Promise<void> {
    return invoke('plugin:menu|remove', {
      rid: this.rid,
      kind: this.kind,
      item: [item.rid, item.kind]
    })
  }

  /** Remove a menu item from this menu at the specified position. */
  async removeAt(
    position: number
  ): Promise<
    | Submenu
    | MenuItem
    | PredefinedMenuItem
    | CheckMenuItem
    | IconMenuItem
    | null
  > {
    return invoke<[number, string, ItemKind]>('plugin:menu|remove_at', {
      rid: this.rid,
      kind: this.kind,
      position
    }).then(itemFromKind)
  }

  /** Returns a list of menu items that has been added to this menu. */
  async items(): Promise<
    Array<
      Submenu | MenuItem | PredefinedMenuItem | CheckMenuItem | IconMenuItem
    >
  > {
    return invoke<Array<[number, string, ItemKind]>>('plugin:menu|items', {
      rid: this.rid,
      kind: this.kind
    }).then((i) => i.map(itemFromKind))
  }

  /** Retrieves the menu item matching the given identifier. */
  async get(
    id: string
  ): Promise<
    | Submenu
    | MenuItem
    | PredefinedMenuItem
    | CheckMenuItem
    | IconMenuItem
    | null
  > {
    return invoke<[number, string, ItemKind] | null>('plugin:menu|get', {
      rid: this.rid,
      kind: this.kind,
      id
    }).then((r) => (r ? itemFromKind(r) : null))
  }

  /**
   * Popup this menu as a context menu on the specified window.
   *
   * If the position, is provided, it is relative to the window's top-left corner.
   */
  async popup(
    at?: PhysicalPosition | LogicalPosition,
    window?: Window
  ): Promise<void> {
    return invoke('plugin:menu|popup', {
      rid: this.rid,
      kind: this.kind,
      window: window?.label ?? null,
      at
    })
  }

  /**
   * Sets the app-wide menu and returns the previous one.
   *
   * If a window was not created with an explicit menu or had one set explicitly,
   * this menu will be assigned to it.
   */
  async setAsAppMenu(): Promise<Menu | null> {
    return invoke<[number, string] | null>('plugin:menu|set_as_app_menu', {
      rid: this.rid
    }).then((r) => (r ? new Menu(r[0], r[1]) : null))
  }

  /**
   * Sets the window menu and returns the previous one.
   *
   * #### Platform-specific:
   *
   * - **macOS:** Unsupported. The menu on macOS is app-wide and not specific to one
   * window, if you need to set it, use {@linkcode Menu.setAsAppMenu} instead.
   */
  async setAsWindowMenu(window?: Window): Promise<Menu | null> {
    return invoke<[number, string] | null>('plugin:menu|set_as_window_menu', {
      rid: this.rid,
      window: window?.label ?? null
    }).then((r) => (r ? new Menu(r[0], r[1]) : null))
  }
}