import { isOSX } from '@theia/core/lib/common/os';
import { CommonMenus } from '@theia/core/lib/browser/common-frontend-contribution';
import { MAIN_MENU_BAR, MenuModelRegistry, MenuNode, MenuPath, SubMenuOptions } from '@theia/core/lib/common/menu';

export namespace ArduinoMenus {

    // Main menu
    // -- File
    export const FILE__SKETCH_GROUP = [...CommonMenus.FILE, '0_sketch'];
    export const FILE__PRINT_GROUP = [...CommonMenus.FILE, '1_print'];
    // XXX: on macOS, the "Preferences" and "Advanced" group is not under `File`
    // The empty path ensures no top level menu is created for the preferences, even if they contains sub menus
    export const FILE__PREFERENCES_GROUP = [...(isOSX ? [''] : CommonMenus.FILE), '2_preferences'];
    export const FILE__ADVANCED_GROUP = [...(isOSX ? [''] : CommonMenus.FILE), '3_advanced'];
    export const FILE__ADVANCED_SUBMENU = [...FILE__ADVANCED_GROUP, '0_advanced_sub'];

    export const FILE__QUIT_GROUP = [...CommonMenus.FILE, '3_quit'];

    // -- File / Open Recent
    export const FILE__OPEN_RECENT_SUBMENU = [...FILE__SKETCH_GROUP, '0_open_recent'];

    // -- File / Sketchbook
    export const FILE__SKETCHBOOK_SUBMENU = [...FILE__SKETCH_GROUP, '1_sketchbook'];

    // -- File / Examples
    export const FILE__EXAMPLES_SUBMENU = [...FILE__SKETCH_GROUP, '2_examples'];
    export const EXAMPLES__BUILT_IN_GROUP = [...FILE__EXAMPLES_SUBMENU, '0_built_ins'];
    export const EXAMPLES__ANY_BOARD_GROUP = [...FILE__EXAMPLES_SUBMENU, '1_any_board'];
    export const EXAMPLES__CURRENT_BOARD_GROUP = [...FILE__EXAMPLES_SUBMENU, '2_current_board'];
    export const EXAMPLES__USER_LIBS_GROUP = [...FILE__EXAMPLES_SUBMENU, '3_user_libs'];

    // -- Edit
    // `Copy`, `Copy to Forum`, `Paste`, etc.
    // Note: `1_undo` is the first group from Theia, we start with `2`
    export const EDIT__TEXT_CONTROL_GROUP = [...CommonMenus.EDIT, '2_text_control'];
    // `Comment/Uncomment`, etc.
    export const EDIT__CODE_CONTROL_GROUP = [...CommonMenus.EDIT, '3_code_control'];
    export const EDIT__FONT_CONTROL_GROUP = [...CommonMenus.EDIT, '4_font_control'];
    export const EDIT__FIND_GROUP = [...CommonMenus.EDIT, '5_find'];

    // -- Sketch
    export const SKETCH = [...MAIN_MENU_BAR, '3_sketch'];
    export const SKETCH__MAIN_GROUP = [...SKETCH, '0_main'];
    export const SKETCH__UTILS_GROUP = [...SKETCH, '1_utils'];

    // -- Tools
    export const TOOLS = [...MAIN_MENU_BAR, '4_tools'];
    // `Auto Format`, `Library Manager...`, `Boards Manager...`
    export const TOOLS__MAIN_GROUP = [...TOOLS, '0_main'];
    // `Board`, `Port`, and `Get Board Info`.
    export const TOOLS__BOARD_SELECTION_GROUP = [...TOOLS, '2_board_selection'];
    // Core settings, such as `Processor` and `Programmers` for the board and `Burn Bootloader`
    export const TOOLS__BOARD_SETTINGS_GROUP = [...TOOLS, '3_board_settings'];

    // -- Help
    // `Getting Started`, `Environment`, `Troubleshooting`, etc.
    export const HELP__MAIN_GROUP = [...CommonMenus.HELP, '0_main'];
    // `Find in reference`, `FAQ`, etc.
    export const HELP__FIND_GROUP = [...CommonMenus.HELP, '1_find'];
    // `Advanced Mode`.
    // XXX: this will be removed.
    export const HELP__CONTROL_GROUP = [...CommonMenus.HELP, '2_control'];
    // `About` group
    // XXX: on macOS, the about group is not under `Help`
    export const HELP__ABOUT_GROUP = [...(isOSX ? MAIN_MENU_BAR : CommonMenus.HELP), '999_about'];

    // ------------

    // Context menus
    // -- Open
    export const OPEN_SKETCH__CONTEXT = ['arduino-open-sketch--context'];
    export const OPEN_SKETCH__CONTEXT__OPEN_GROUP = [...OPEN_SKETCH__CONTEXT, '0_open'];
    export const OPEN_SKETCH__CONTEXT__RECENT_GROUP = [...OPEN_SKETCH__CONTEXT, '1_recent'];
    export const OPEN_SKETCH__CONTEXT__EXAMPLES_GROUP = [...OPEN_SKETCH__CONTEXT, '2_examples'];

    // -- Sketch control
    export const SKETCH_CONTROL__CONTEXT = ['arduino-sketch-control--context'];
    // `New Tab`, `Rename`, `Delete`
    export const SKETCH_CONTROL__CONTEXT__MAIN_GROUP = [...SKETCH_CONTROL__CONTEXT, '0_main'];
    // `Previous Tab`, `Next Tab`
    export const SKETCH_CONTROL__CONTEXT__NAVIGATION_GROUP = [...SKETCH_CONTROL__CONTEXT, '1_navigation'];
    // Sketch files opened in editors
    export const SKETCH_CONTROL__CONTEXT__RESOURCES_GROUP = [...SKETCH_CONTROL__CONTEXT, '2_resources'];

}

/**
 * This is a hack. It removes a submenu with all its children if any.
 * Theia cannot dispose submenu entries with a proper API: https://github.com/eclipse-theia/theia/issues/7299
 */
export function unregisterSubmenu(menuPath: string[], menuRegistry: MenuModelRegistry): void {
    if (menuPath.length < 2) {
        throw new Error(`Expected at least two item as a menu-path. Got ${JSON.stringify(menuPath)} instead.`);
    }
    const toRemove = menuPath[menuPath.length - 1];
    const parentMenuPath = menuPath.slice(0, menuPath.length - 1);
    // This is unsafe. Calling `getMenu` with a non-existing menu-path will result in a new menu creation.
    // https://github.com/eclipse-theia/theia/issues/7300
    const parent = menuRegistry.getMenu(parentMenuPath);
    const index = parent.children.findIndex(({ id }) => id === toRemove);
    if (index === -1) {
        throw new Error(`Could not find menu with menu-path: ${JSON.stringify(menuPath)}.`);
    }
    (parent.children as Array<MenuNode>).splice(index, 1);
}

/**
 * Special menu node that is not backed by any commands and is always disabled.
 */
export class PlaceholderMenuNode implements MenuNode {

    constructor(protected readonly menuPath: MenuPath, readonly label: string, protected options: SubMenuOptions = { order: '0' }) { }

    get icon(): string | undefined {
        return this.options?.iconClass;
    }

    get sortString(): string {
        return this.options?.order || this.label;
    }

    get id(): string {
        return [...this.menuPath, 'placeholder'].join('-');
    }

}