(function () {
    'use strict';

    angular.module('shared')
        .service('mediaPlayerRegistration', [mediaPlayerRegistrationService]);

    function mediaPlayerRegistrationService() {
        var self = this;
        // Remember the last played audio file so we can ensure only one audio file plays at a time
        var lastPlayedAudioCtrl = null;

        self.pauseAllMedia = function () {
            if (lastPlayedAudioCtrl) {
                lastPlayedAudioCtrl.pauseAudio();
            }
            if (angular.element('video')[0]) {
                angular.element('video')[0].pause();
            }
        };

        self.playAudio = function(newPlayingAudioCtrl) {
            // Ensure only one audio player plays at a time
            if (lastPlayedAudioCtrl) {
                lastPlayedAudioCtrl.pauseAudio();
            }
            var playPromise = newPlayingAudioCtrl.audio.play();
            if (playPromise) {
                newPlayingAudioCtrl.isSoundPlaying = true;
                playPromise.then(function() {
                    newPlayingAudioCtrl.isSoundPlaying = true;
                    lastPlayedAudioCtrl = newPlayingAudioCtrl;
                }).catch(function() {
                    newPlayingAudioCtrl.isSoundPlaying = false;
                    console.error("Error with playback of " + newPlayingAudioCtrl.src);
                })
            } else {
                // playPromise is undefined in IE, still allow the sound to play
                newPlayingAudioCtrl.isSoundPlaying = true;
                lastPlayedAudioCtrl = newPlayingAudioCtrl;
            }
        }
    }

})();