/**
 * Copyright © Charles Kerr, Dave Perrett, Malcolm Jarvis and Bruno Bierbaumer
 *
 * This file is licensed under the GPLv2.
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 */

const RPC = {
  _DaemonVersion: 'version',
  _DownSpeedLimit: 'speed-limit-down',
  _DownSpeedLimited: 'speed-limit-down-enabled',
  _QueueMoveTop: 'queue-move-top',
  _QueueMoveBottom: 'queue-move-bottom',
  _QueueMoveUp: 'queue-move-up',
  _QueueMoveDown: 'queue-move-down',
  _Root: '../rpc',
  _TurtleDownSpeedLimit: 'alt-speed-down',
  _TurtleState: 'alt-speed-enabled',
  _TurtleUpSpeedLimit: 'alt-speed-up',
  _UpSpeedLimit: 'speed-limit-up',
  _UpSpeedLimited: 'speed-limit-up-enabled',
};

function TransmissionRemote(controller) {
  this.initialize(controller);
  return this;
}

TransmissionRemote.prototype = {
  /*
   * Constructor
   */
  initialize: function (controller) {
    this._controller = controller;
    this._error = '';
    this._token = '';
  },

  /*
   * Display an error if an ajax request fails, and stop sending requests
   * or on a 409, globally set the X-Transmission-Session-Id and resend
   */
  ajaxError: function (request, error_string, exception, ajaxObject) {
    let token;
    const remote = this;

    // set the Transmission-Session-Id on a 409
    if (
      request.status === 409 &&
      (token = request.getResponseHeader('X-Transmission-Session-Id'))
    ) {
      remote._token = token;
      $.ajax(ajaxObject);
      return;
    }

    remote._error = request.responseText
      ? request.responseText.trim().replace(/(<([^>]+)>)/gi, '')
      : '';
    if (!remote._error.length) {
      remote._error = 'Server not responding';
    }

    dialog.confirm(
      'Connection Failed',
      'Could not connect to the server. You may need to reload the page to reconnect.',
      'Details',
      function () {
        alert(remote._error);
      },
      'Dismiss'
    );
    remote._controller.togglePeriodicSessionRefresh(false);
  },

  appendSessionId: function (XHR) {
    if (this._token) {
      XHR.setRequestHeader('X-Transmission-Session-Id', this._token);
    }
  },

  sendRequest: function (data, callback, context, async) {
    const remote = this;
    if (typeof async != 'boolean') {
      async = true;
    }

    var ajaxSettings = {
      url: RPC._Root,
      type: 'POST',
      contentType: 'json',
      dataType: 'json',
      cache: false,
      data: JSON.stringify(data),
      beforeSend: function (XHR) {
        remote.appendSessionId(XHR);
      },
      error: function (request, error_string, exception) {
        remote.ajaxError(request, error_string, exception, ajaxSettings);
      },
      success: callback,
      context: context,
      async: async,
    };

    $.ajax(ajaxSettings);
  },

  loadDaemonPrefs: function (callback, context, async) {
    const o = {
      method: 'session-get',
    };
    this.sendRequest(o, callback, context, async);
  },

  checkPort: function (callback, context, async) {
    const o = {
      method: 'port-test',
    };
    this.sendRequest(o, callback, context, async);
  },

  renameTorrent: function (torrentIds, oldpath, newname, callback, context) {
    const o = {
      method: 'torrent-rename-path',
      arguments: {
        ids: torrentIds,
        path: oldpath,
        name: newname,
      },
    };
    this.sendRequest(o, callback, context);
  },

  loadDaemonStats: function (callback, context, async) {
    const o = {
      method: 'session-stats',
    };
    this.sendRequest(o, callback, context, async);
  },

  updateTorrents: function (torrentIds, fields, callback, context) {
    const o = {
      method: 'torrent-get',
      arguments: {
        fields: fields,
      },
    };
    if (torrentIds) {
      o['arguments'].ids = torrentIds;
    }
    this.sendRequest(o, function (response) {
      const args = response['arguments'];
      callback.call(context, args.torrents, args.removed);
    });
  },

  getFreeSpace: function (dir, callback, context) {
    const o = {
      method: 'free-space',
      arguments: {
        path: dir,
      },
    };
    this.sendRequest(o, function (response) {
      const args = response['arguments'];
      callback.call(context, args.path, args['size-bytes']);
    });
  },

  changeFileCommand: function (torrentId, fileIndices, command) {
    const remote = this,
      args = {
        ids: [torrentId],
      };
    args[command] = fileIndices;
    this.sendRequest(
      {
        arguments: args,
        method: 'torrent-set',
      },
      function () {
        remote._controller.refreshTorrents([torrentId]);
      }
    );
  },

  sendTorrentSetRequests: function (method, torrent_ids, args, callback, context) {
    if (!args) {
      args = {};
    }
    args['ids'] = torrent_ids;
    const o = {
      method: method,
      arguments: args,
    };
    this.sendRequest(o, callback, context);
  },

  sendTorrentActionRequests: function (method, torrent_ids, callback, context) {
    this.sendTorrentSetRequests(method, torrent_ids, null, callback, context);
  },

  startTorrents: function (torrent_ids, noqueue, callback, context) {
    const name = noqueue ? 'torrent-start-now' : 'torrent-start';
    this.sendTorrentActionRequests(name, torrent_ids, callback, context);
  },
  stopTorrents: function (torrent_ids, callback, context) {
    this.sendTorrentActionRequests('torrent-stop', torrent_ids, callback, context);
  },

  moveTorrents: function (torrent_ids, new_location, callback, context) {
    this.sendTorrentSetRequests(
      'torrent-set-location',
      torrent_ids,
      {
        move: true,
        location: new_location,
      },
      callback,
      context
    );
  },

  removeTorrents: function (torrent_ids, callback, context) {
    this.sendTorrentActionRequests('torrent-remove', torrent_ids, callback, context);
  },
  removeTorrentsAndData: function (torrents) {
    const remote = this;
    const o = {
      method: 'torrent-remove',
      arguments: {
        'delete-local-data': true,
        ids: [],
      },
    };

    if (torrents) {
      for (let i = 0, len = torrents.length; i < len; ++i) {
        o.arguments.ids.push(torrents[i].getId());
      }
    }
    this.sendRequest(o, function () {
      remote._controller.refreshTorrents();
    });
  },
  verifyTorrents: function (torrent_ids, callback, context) {
    this.sendTorrentActionRequests('torrent-verify', torrent_ids, callback, context);
  },
  reannounceTorrents: function (torrent_ids, callback, context) {
    this.sendTorrentActionRequests('torrent-reannounce', torrent_ids, callback, context);
  },
  addTorrentByUrl: function (url, options) {
    const remote = this;
    if (url.match(/^[0-9a-f]{40}$/i)) {
      url = 'magnet:?xt=urn:btih:' + url;
    }
    const o = {
      method: 'torrent-add',
      arguments: {
        paused: options.paused,
        filename: url,
      },
    };
    this.sendRequest(o, function () {
      remote._controller.refreshTorrents();
    });
  },
  savePrefs: function (args) {
    const remote = this;
    const o = {
      method: 'session-set',
      arguments: args,
    };
    this.sendRequest(o, function () {
      remote._controller.loadDaemonPrefs();
    });
  },
  updateBlocklist: function () {
    const remote = this;
    const o = {
      method: 'blocklist-update',
    };
    this.sendRequest(o, function () {
      remote._controller.loadDaemonPrefs();
    });
  },

  // Added queue calls
  moveTorrentsToTop: function (torrent_ids, callback, context) {
    this.sendTorrentActionRequests(RPC._QueueMoveTop, torrent_ids, callback, context);
  },
  moveTorrentsToBottom: function (torrent_ids, callback, context) {
    this.sendTorrentActionRequests(RPC._QueueMoveBottom, torrent_ids, callback, context);
  },
  moveTorrentsUp: function (torrent_ids, callback, context) {
    this.sendTorrentActionRequests(RPC._QueueMoveUp, torrent_ids, callback, context);
  },
  moveTorrentsDown: function (torrent_ids, callback, context) {
    this.sendTorrentActionRequests(RPC._QueueMoveDown, torrent_ids, callback, context);
  },
};