'use strict';
/* global avtManager */

(function(exports) {
  function DeviceManager() {

  }

  DeviceManager.prototype = {
    devices: {},
    avtSelector: document.getElementById('AVTList'),

    init: function dm_init() {
      return this;
    },

    _popDeviceId: function dm_popDeviceId(serviceId) {
      return serviceId.split('::')[0];
    },

    getDeviceByService: function dm_getDeviceByService(serviceId) {
      return this.devices[this._popDeviceId(serviceId)];
    },

    getSelectedService: function dm_getCurrentService(serviceName) {
      var selected = this.avtSelector[this.avtSelector.selectedIndex].value;
      if (selected == 'local') {
        return null;
      } else {
        return this.getOtherService(selected, serviceName);
      }
    },

    getOtherService: function dm_getOtherService(serviceId, otherServiceName) {
      var deviceId = this._popDeviceId(serviceId);
      for (var sid in this.devices[deviceId]) {
        if (sid.indexOf(otherServiceName) != -1) {
          return this.devices[deviceId][sid];
        }
      }
    },

    addService: function dm_addService(serviceWrapper) {
      var deviceId = this._popDeviceId(serviceWrapper.svc.id);
      if (!this.devices[deviceId]) {
        this.devices[deviceId] = {};
      }
      this.devices[deviceId][serviceWrapper.svc.id] = serviceWrapper;
    },

    removeService: function dm_removeService(serviceId) {
      var deviceId = this._popDeviceId(serviceId);
      if (this.devices[deviceId]) {
        return;
      }
      delete this.devices[deviceId][serviceId];
      this.removeDeviceIfEmpty(deviceId);
    },

    removeDeviceIfEmpty: function dm_removeIfEmpty(deviceId) {
      this.removeDevice(deviceId);
    },

    removeDevice: function dm_removeDevice(deviceId) {
      delete this.devices[deviceId];
    },

    play: function dm_play(serviceId, mediaUrl, mediaMetadata) {
      var deviceId = this._popDeviceId(serviceId);
      var avtService = this.devices[deviceId][serviceId];

      avtService.stop(0).then(function(e) {
        return avtService.setAVTransportURI(0, mediaUrl, mediaMetadata);
      }).then(function(e) {
        return avtService.play(0).then(function() {
          return avtManager.updateMediaInfo();
        });
      }).then(null, function(e) {
        console.log('Error:' + e.description);
      });
    }
  };

  exports.DeviceManager = DeviceManager;
}(window));