var electron = require('electron')
var debug = require('debug')('webtorrent-app:menu')
var windows = require('./windows')

var app = electron.app

function toggleFullScreen () {
  debug('toggleFullScreen')
  if (windows.main) {
    windows.main.setFullScreen(!windows.main.isFullScreen())
  }
}

function onToggleFullScreen () {
  getMenuItem('Full Screen').checked = windows.main.isFullScreen()
  windows.main.send('fullscreenChanged', windows.main.isFullScreen())
}

// Sets whether the window should always show on top of other windows
function toggleAlwaysOnTop () {
  debug('toggleAlwaysOnTop %s')
  if (windows.main) {
    windows.main.setAlwaysOnTop(!windows.main.isAlwaysOnTop())
    getMenuItem('Float on Top').checked = windows.main.isAlwaysOnTop()
  }
}

function toggleDevTools () {
  debug('toggleDevTools')
  if (windows.main) {
    windows.main.toggleDevTools()
  }
}

function reloadWindow () {
  debug('reloadWindow')
  if (windows.main) {
    app.startTime = Date.now()
    windows.main.webContents.reloadIgnoringCache()
  }
}

function getMenuItem (label) {
  for (var i = 0; i < appMenu.items.length; i++) {
    var menuItem = appMenu.items[i].submenu.items.find(function (item) {
      return item.label === label
    })
    if (menuItem) return menuItem
  }
}

function getMenuTemplate () {
  var template = [
    {
      label: 'File',
      submenu: [
        {
          label: 'Create New Torrent...',
          accelerator: 'CmdOrCtrl+N',
          click: function () {
            electron.dialog.showOpenDialog({
              title: 'Select a file or folder for the torrent file.',
              properties: [ 'openFile', 'openDirectory', 'multiSelections' ]
            }, function (filenames) {
              if (!Array.isArray(filenames)) return
              windows.main.send('seed', filenames)
            })
          }
        },
        {
          label: 'Open Torrent File...',
          accelerator: 'CmdOrCtrl+O',
          click: function () {
            electron.dialog.showOpenDialog(windows.main, {
              title: 'Select a .torrent file to open.',
              properties: [ 'openFile', 'multiSelections' ]
            }, function (filenames) {
              if (!Array.isArray(filenames)) return
              filenames.forEach(function (filename) {
                windows.main.send('addTorrent', filename)
              })
            })
          }
        },
        {
          label: 'Open Torrent Address...',
          accelerator: 'CmdOrCtrl+U',
          click: function () { electron.dialog.showMessageBox({ message: 'TODO', buttons: ['OK'] }) }
        },
        {
          type: 'separator'
        },
        {
          label: 'Close Window',
          accelerator: 'CmdOrCtrl+W',
          role: 'close'
        }
      ]
    },
    {
      label: 'Edit',
      submenu: [
        {
          label: 'Cut',
          accelerator: 'CmdOrCtrl+X',
          role: 'cut'
        },
        {
          label: 'Copy',
          accelerator: 'CmdOrCtrl+C',
          role: 'copy'
        },
        {
          label: 'Paste Torrent Address',
          accelerator: 'CmdOrCtrl+V',
          role: 'paste'
        },
        {
          label: 'Select All',
          accelerator: 'CmdOrCtrl+A',
          role: 'selectall'
        }
      ]
    },
    {
      label: 'View',
      submenu: [
        {
          label: 'Full Screen',
          type: 'checkbox',
          accelerator: (function () {
            if (process.platform === 'darwin') return 'Ctrl+Command+F'
            else return 'F11'
          })(),
          click: toggleFullScreen
        },
        {
          label: 'Float on Top',
          type: 'checkbox',
          click: toggleAlwaysOnTop
        },
        {
          type: 'separator'
        },
        {
          label: 'Reload',
          accelerator: 'CmdOrCtrl+R',
          click: reloadWindow
        },
        {
          label: 'Developer Tools',
          accelerator: (function () {
            if (process.platform === 'darwin') return 'Alt+Command+I'
            else return 'Ctrl+Shift+I'
          })(),
          click: toggleDevTools
        }
      ]
    },
    {
      label: 'Window',
      role: 'window',
      submenu: [
        {
          label: 'Minimize',
          accelerator: 'CmdOrCtrl+M',
          role: 'minimize'
        }
      ]
    },
    {
      label: 'Help',
      role: 'help',
      submenu: [
        {
          label: 'Learn more about WebTorrent',
          click: function () { electron.shell.openExternal('https://webtorrent.io') }
        },
        {
          label: 'Contribute on GitHub',
          click: function () { electron.shell.openExternal('https://github.com/feross/webtorrent-app') }
        },
        {
          type: 'separator'
        },
        {
          label: 'Report an Issue...',
          click: function () { electron.shell.openExternal('https://github.com/feross/webtorrent-app/issues') }
        }
      ]
    }
  ]

  if (process.platform === 'darwin') {
    var name = app.getName()
    template.unshift({
      label: name,
      submenu: [
        {
          label: 'About ' + name,
          role: 'about'
        },
        {
          type: 'separator'
        },
        {
          label: 'Services',
          role: 'services',
          submenu: []
        },
        {
          type: 'separator'
        },
        {
          label: 'Hide ' + name,
          accelerator: 'Command+H',
          role: 'hide'
        },
        {
          label: 'Hide Others',
          accelerator: 'Command+Alt+H',
          role: 'hideothers'
        },
        {
          label: 'Show All',
          role: 'unhide'
        },
        {
          type: 'separator'
        },
        {
          label: 'Quit',
          accelerator: 'Command+Q',
          click: function () { app.quit() }
        }
      ]
    })

    // Window menu
    template[4].submenu.push(
      {
        type: 'separator'
      },
      {
        label: 'Bring All to Front',
        role: 'front'
      }
    )
  }

  return template
}

var appMenu = electron.Menu.buildFromTemplate(getMenuTemplate())

var menu = {
  appMenu: appMenu,
  onToggleFullScreen: onToggleFullScreen
}

module.exports = menu