/*
 * Copyright © Dave Perrett, Malcolm Jarvis and Bruno Bierbaumer
 * This code is licensed under the GPL version 2.
 * For details, see http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * Class TransmissionRemote
 */

var RPC = {
	_Root                   : '../rpc',
	_DaemonVersion          : 'version',
	_Encryption             : 'encryption',
	_EncryptionPreferred    : 'preferred',
	_EncryptionRequired     : 'required',
	_UpSpeedLimit           : 'speed-limit-up',
	_DownSpeedLimit         : 'speed-limit-down',
	_DownloadDir            : 'download-dir',
	_PeerPort               : 'peer-port',
	_UpSpeedLimited         : 'speed-limit-up-enabled',
	_DownSpeedLimited       : 'speed-limit-down-enabled',
	_TurtleState            : 'alt-speed-enabled',
	_TurtleUpSpeedLimit     : 'alt-speed-up',
	_TurtleDownSpeedLimit   : 'alt-speed-down',
	_TurtleTimeEnabled      : 'alt-speed-time-enabled',
	_TurtleTimeBegin        : 'alt-speed-time-begin',
	_TurtleTimeEnd          : 'alt-speed-time-end',
	_TurtleTimeDay          : 'alt-speed-time-day',
	_PeerLimitGlobal        : 'peer-limit-global',
	_PeerLimitPerTorrent    : 'peer-limit-per-torrent',
	_PexEnabled             : 'pex-enabled',
	_DhtEnabled             : 'dht-enabled',
	_LpdEnabled             : 'lpd-enabled',
	_BlocklistEnabled       : 'blocklist-enabled',
	_BlocklistURL           : 'blocklist-url',
	_BlocklistSize          : 'blocklist-size',
	_UtpEnabled             : 'utp-enabled',
	_PeerPortRandom         : 'peer-port-random-on-start',
	_PortForwardingEnabled  : 'port-forwarding-enabled',
	_StartAddedTorrent      : 'start-added-torrents',
	_QueueMoveTop           : 'queue-move-top',
	_QueueMoveBottom        : 'queue-move-bottom',
	_QueueMoveUp            : 'queue-move-up',
	_QueueMoveDown          : 'queue-move-down'
};

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) {
		var token,
		   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(/(<([^>]+)>)/ig,"")
					: "";
		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',
			'alert(remote._error);',
			null,
			'Dismiss');
		remote._controller.togglePeriodicSessionRefresh(false);
	},

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

	sendRequest: function(data, callback, context, async) {
		var 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) {
		var o = { method: 'session-get' };
		this.sendRequest(o, callback, context, async);
	},
	
	checkPort: function(callback, context, async) {
		var o = { method: 'port-test' };
		this.sendRequest(o, callback, context, async);
	},
	
	loadDaemonStats: function(callback, context, async) {
		var o = { method: 'session-stats' };
		this.sendRequest(o, callback, context, async);
	},

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

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

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

		if (torrents) {
			for (var 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) {
		var remote = this;
		if (url.match(/^[0-9a-f]{40}$/i)) {
			url = 'magnet:?xt=urn:btih:'+url;
		}
		var o = {
			method: 'torrent-add',
			arguments: {
				paused: (options.paused),
				filename: url
			}
		};
		this.sendRequest(o, function() {
			remote._controller.refreshTorrents();
		});
	},
	savePrefs: function(args) {
		var remote = this;
		var o = {
			method: 'session-set',
			arguments: args
		};
		this.sendRequest(o, function() {
			remote._controller.loadDaemonPrefs();
		});
	},
	updateBlocklist: function() {
		var remote = this;
		var 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);
	}
};