import {
  app,
  Menu,
  shell,
  BrowserWindow,
  MenuItemConstructorOptions
} from 'electron';

interface DarwinMenuItemConstructorOptions extends MenuItemConstructorOptions {
  selector?: string;
  submenu?: DarwinMenuItemConstructorOptions[] | Menu;
}

export default class MenuBuilder {
  mainWindow: BrowserWindow;

  constructor(mainWindow: BrowserWindow) {
    this.mainWindow = mainWindow;
  }

  buildMenu(): Menu {
    if (
      process.env.NODE_ENV === 'development' ||
      process.env.DEBUG_PROD === 'true'
    ) {
      this.setupDevelopmentEnvironment();
    }

    const template =
      process.platform === 'darwin'
        ? this.buildDarwinTemplate()
        : this.buildDefaultTemplate();

    const menu = Menu.buildFromTemplate(template);
    Menu.setApplicationMenu(menu);

    return menu;
  }

  setupDevelopmentEnvironment(): void {
    this.mainWindow.webContents.on('context-menu', (_, props) => {
      const { x, y } = props;

      Menu.buildFromTemplate([
        {
          label: 'Inspect element',
          click: () => {
            this.mainWindow.webContents.inspectElement(x, y);
          }
        }
      ]).popup({ window: this.mainWindow });
    });
  }

  buildDarwinTemplate(): MenuItemConstructorOptions[] {
    const subMenuAbout: DarwinMenuItemConstructorOptions = {
      label: 'Skytron',
      submenu: [
        {
          label: 'About Skytron',
          selector: 'orderFrontStandardAboutPanel:'
        },
        { type: 'separator' },
        { label: 'Services', submenu: [] },
        { type: 'separator' },
        {
          label: 'Hide Skytron',
          accelerator: 'Command+H',
          selector: 'hide:'
        },
        {
          label: 'Hide Others',
          accelerator: 'Command+Shift+H',
          selector: 'hideOtherApplications:'
        },
        { label: 'Show All', selector: 'unhideAllApplications:' },
        { type: 'separator' },
        {
          label: 'Quit',
          accelerator: 'Command+Q',
          click: () => {
            app.quit();
          }
        }
      ]
    };

    const subMenuViewDev: MenuItemConstructorOptions = {
      label: 'View',
      submenu: [
        {
          label: 'Reload',
          accelerator: 'Command+R',
          click: () => {
            this.mainWindow.webContents.reload();
          }
        },
        {
          label: 'Toggle Full Screen',
          accelerator: 'Ctrl+Command+F',
          click: () => {
            this.mainWindow.setFullScreen(!this.mainWindow.isFullScreen());
          }
        },
        {
          label: 'Toggle Developer Tools',
          accelerator: 'Alt+Command+I',
          click: () => {
            this.mainWindow.webContents.toggleDevTools();
          }
        }
      ]
    };

    const subMenuWindow: DarwinMenuItemConstructorOptions = {
      label: 'Window',
      submenu: [
        {
          label: 'Minimize',
          accelerator: 'Command+M',
          selector: 'performMiniaturize:'
        },
        { label: 'Close', accelerator: 'Command+W', selector: 'performClose:' },
        { type: 'separator' },
        { label: 'Bring All to Front', selector: 'arrangeInFront:' }
      ]
    };
    const subMenuHelp: MenuItemConstructorOptions = {
      label: 'Help',
      submenu: [
        {
          label: 'Learn More',
          click() {
            shell.openExternal('https://github.com/talhasch/skytron');
          }
        }
      ]
    };

    if (process.env.NODE_ENV === 'development' || process.env.DEBUG_PROD === 'true') {
      return [subMenuAbout, subMenuViewDev, subMenuWindow, subMenuHelp];
    }

    return [subMenuAbout, subMenuWindow, subMenuHelp];
  }

  buildDefaultTemplate() {
    const templateDefault = [
      {
        label: '&File',
        submenu: [
          {
            label: '&Open',
            accelerator: 'Ctrl+O'
          },
          {
            label: '&Close',
            accelerator: 'Ctrl+W',
            click: () => {
              this.mainWindow.close();
            }
          }
        ]
      },
      {
        label: '&View',
        submenu:
          process.env.NODE_ENV === 'development' ||
          process.env.DEBUG_PROD === 'true'
            ? [
              {
                label: '&Reload',
                accelerator: 'Ctrl+R',
                click: () => {
                  this.mainWindow.webContents.reload();
                }
              },
              {
                label: 'Toggle &Full Screen',
                accelerator: 'F11',
                click: () => {
                  this.mainWindow.setFullScreen(
                    !this.mainWindow.isFullScreen()
                  );
                }
              },
              {
                label: 'Toggle &Developer Tools',
                accelerator: 'Alt+Ctrl+I',
                click: () => {
                  this.mainWindow.webContents.toggleDevTools();
                }
              }
            ]
            : [
              {
                label: 'Toggle &Full Screen',
                accelerator: 'F11',
                click: () => {
                  this.mainWindow.setFullScreen(
                    !this.mainWindow.isFullScreen()
                  );
                }
              }
            ]
      },
      {
        label: 'Help',
        submenu: [
          {
            label: 'Learn More',
            click() {
              shell.openExternal('https://electronjs.org');
            }
          },
          {
            label: 'Documentation',
            click() {
              shell.openExternal(
                'https://github.com/electron/electron/tree/master/docs#readme'
              );
            }
          },
          {
            label: 'Community Discussions',
            click() {
              shell.openExternal('https://www.electronjs.org/community');
            }
          },
          {
            label: 'Search Issues',
            click() {
              shell.openExternal('https://github.com/electron/electron/issues');
            }
          }
        ]
      }
    ];

    return templateDefault;
  }
}