'use strict';
const { TopLevelWindow, MenuItem, webContents } = require('electron');
const { sortMenuItems } = require('@electron/internal/browser/api/menu-utils');
const EventEmitter = require('events').EventEmitter;
const v8Util = process.electronBinding('v8_util');
const bindings = process.electronBinding('menu');
const { Menu } = bindings;
let applicationMenu = null;
let groupIdIndex = 0;
Object.setPrototypeOf(Menu.prototype, EventEmitter.prototype);
// Menu Delegate.
// This object should hold no reference to |Menu| to avoid cyclic reference.
const delegate = {
    isCommandIdChecked: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].checked : undefined,
    isCommandIdEnabled: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].enabled : undefined,
    shouldCommandIdWorkWhenHidden: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].acceleratorWorksWhenHidden : undefined,
    isCommandIdVisible: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].visible : undefined,
    getAcceleratorForCommandId: (menu, id, useDefaultAccelerator) => {
        const command = menu.commandsMap[id];
        if (!command)
            return;
        if (command.accelerator != null)
            return command.accelerator;
        if (useDefaultAccelerator)
            return command.getDefaultRoleAccelerator();
    },
    shouldRegisterAcceleratorForCommandId: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].registerAccelerator : undefined,
    executeCommand: (menu, event, id) => {
        const command = menu.commandsMap[id];
        if (!command)
            return;
        command.click(event, TopLevelWindow.getFocusedWindow(), webContents.getFocusedWebContents());
    },
    menuWillShow: (menu) => {
        // Ensure radio groups have at least one menu item selected
        for (const id in menu.groupsMap) {
            const found = menu.groupsMap[id].find(item => item.checked) || null;
            if (!found)
                v8Util.setHiddenValue(menu.groupsMap[id][0], 'checked', true);
        }
    }
};
/* Instance Methods */
Menu.prototype._init = function () {
    this.commandsMap = {};
    this.groupsMap = {};
    this.items = [];
    this.delegate = delegate;
};
Menu.prototype.popup = function (options = {}) {
    if (options == null || typeof options !== 'object') {
        throw new TypeError('Options must be an object');
    }
    let { window, x, y, positioningItem, callback } = options;
    // no callback passed
    if (!callback || typeof callback !== 'function')
        callback = () => { };
    // set defaults
    if (typeof x !== 'number')
        x = -1;
    if (typeof y !== 'number')
        y = -1;
    if (typeof positioningItem !== 'number')
        positioningItem = -1;
    // find which window to use
    const wins = TopLevelWindow.getAllWindows();
    if (!wins || wins.indexOf(window) === -1) {
        window = TopLevelWindow.getFocusedWindow();
        if (!window && wins && wins.length > 0) {
            window = wins[0];
        }
        if (!window) {
            throw new Error(`Cannot open Menu without a TopLevelWindow present`);
        }
    }
    this.popupAt(window, x, y, positioningItem, callback);
    return { browserWindow: window, x, y, position: positioningItem };
};
Menu.prototype.closePopup = function (window) {
    if (window instanceof TopLevelWindow) {
        this.closePopupAt(window.id);
    }
    else {
        // Passing -1 (invalid) would make closePopupAt close the all menu runners
        // belong to this menu.
        this.closePopupAt(-1);
    }
};
Menu.prototype.getMenuItemById = function (id) {
    const items = this.items;
    let found = items.find(item => item.id === id) || null;
    for (let i = 0; !found && i < items.length; i++) {
        if (items[i].submenu) {
            found = items[i].submenu.getMenuItemById(id);
        }
    }
    return found;
};
Menu.prototype.append = function (item) {
    return this.insert(this.getItemCount(), item);
};
Menu.prototype.insert = function (pos, item) {
    if ((item ? item.constructor : void 0) !== MenuItem) {
        throw new TypeError('Invalid item');
    }
    if (pos < 0) {
        throw new RangeError(`Position ${pos} cannot be less than 0`);
    }
    else if (pos > this.getItemCount()) {
        throw new RangeError(`Position ${pos} cannot be greater than the total MenuItem count`);
    }
    // insert item depending on its type
    insertItemByType.call(this, item, pos);
    // set item properties
    if (item.sublabel)
        this.setSublabel(pos, item.sublabel);
    if (item.icon)
        this.setIcon(pos, item.icon);
    if (item.role)
        this.setRole(pos, item.role);
    // Make menu accessable to items.
    item.overrideReadOnlyProperty('menu', this);
    // Remember the items.
    this.items.splice(pos, 0, item);
    this.commandsMap[item.commandId] = item;
};
Menu.prototype._callMenuWillShow = function () {
    if (this.delegate)
        this.delegate.menuWillShow(this);
    this.items.forEach(item => {
        if (item.submenu)
            item.submenu._callMenuWillShow();
    });
};
/* Static Methods */
Menu.getApplicationMenu = () => applicationMenu;
Menu.sendActionToFirstResponder = bindings.sendActionToFirstResponder;
// set application menu with a preexisting menu
Menu.setApplicationMenu = function (menu) {
    if (menu && menu.constructor !== Menu) {
        throw new TypeError('Invalid menu');
    }
    applicationMenu = menu;
    v8Util.setHiddenValue(global, 'applicationMenuSet', true);
    if (process.platform === 'darwin') {
        if (!menu)
            return;
        menu._callMenuWillShow();
        bindings.setApplicationMenu(menu);
    }
    else {
        const windows = TopLevelWindow.getAllWindows();
        return windows.map(w => w.setMenu(menu));
    }
};
Menu.buildFromTemplate = function (template) {
    if (!Array.isArray(template)) {
        throw new TypeError('Invalid template for Menu: Menu template must be an array');
    }
    if (!areValidTemplateItems(template)) {
        throw new TypeError('Invalid template for MenuItem: must have at least one of label, role or type');
    }
    const filtered = removeExtraSeparators(template);
    const sorted = sortTemplate(filtered);
    const menu = new Menu();
    sorted.forEach(item => {
        if (item instanceof MenuItem) {
            menu.append(item);
        }
        else {
            menu.append(new MenuItem(item));
        }
    });
    return menu;
};
/* Helper Functions */
// validate the template against having the wrong attribute
function areValidTemplateItems(template) {
    return template.every(item => item != null &&
        typeof item === 'object' &&
        (item.hasOwnProperty('label') ||
            item.hasOwnProperty('role') ||
            item.type === 'separator'));
}
function sortTemplate(template) {
    const sorted = sortMenuItems(template);
    for (const id in sorted) {
        const item = sorted[id];
        if (Array.isArray(item.submenu)) {
            item.submenu = sortTemplate(item.submenu);
        }
    }
    return sorted;
}
// Search between separators to find a radio menu item and return its group id
function generateGroupId(items, pos) {
    if (pos > 0) {
        for (let idx = pos - 1; idx >= 0; idx--) {
            if (items[idx].type === 'radio')
                return items[idx].groupId;
            if (items[idx].type === 'separator')
                break;
        }
    }
    else if (pos < items.length) {
        for (let idx = pos; idx <= items.length - 1; idx++) {
            if (items[idx].type === 'radio')
                return items[idx].groupId;
            if (items[idx].type === 'separator')
                break;
        }
    }
    groupIdIndex += 1;
    return groupIdIndex;
}
function removeExtraSeparators(items) {
    // fold adjacent separators together
    let ret = items.filter((e, idx, arr) => {
        if (e.visible === false)
            return true;
        return e.type !== 'separator' || idx === 0 || arr[idx - 1].type !== 'separator';
    });
    // remove edge separators
    ret = ret.filter((e, idx, arr) => {
        if (e.visible === false)
            return true;
        return e.type !== 'separator' || (idx !== 0 && idx !== arr.length - 1);
    });
    return ret;
}
function insertItemByType(item, pos) {
    const types = {
        normal: () => this.insertItem(pos, item.commandId, item.label),
        checkbox: () => this.insertCheckItem(pos, item.commandId, item.label),
        separator: () => this.insertSeparator(pos),
        submenu: () => this.insertSubMenu(pos, item.commandId, item.label, item.submenu),
        radio: () => {
            // Grouping radio menu items
            item.overrideReadOnlyProperty('groupId', generateGroupId(this.items, pos));
            if (this.groupsMap[item.groupId] == null) {
                this.groupsMap[item.groupId] = [];
            }
            this.groupsMap[item.groupId].push(item);
            // Setting a radio menu item should flip other items in the group.
            v8Util.setHiddenValue(item, 'checked', item.checked);
            Object.defineProperty(item, 'checked', {
                enumerable: true,
                get: () => v8Util.getHiddenValue(item, 'checked'),
                set: () => {
                    this.groupsMap[item.groupId].forEach(other => {
                        if (other !== item)
                            v8Util.setHiddenValue(other, 'checked', false);
                    });
                    v8Util.setHiddenValue(item, 'checked', true);
                }
            });
            this.insertRadioItem(pos, item.commandId, item.label, item.groupId);
        }
    };
    types[item.type]();
}
module.exports = Menu;