import DS from 'ember-data';

import Ember from 'ember';

import _ from 'lodash/lodash';

export default DS.Model.extend({

    uri: DS.attr('string'),

    issued: DS.attr('date'),

    title: DS.attr('string'),

    language: DS.attr('string'),

    publishers: DS.attr({ defaultValue: function() { return []; } }),

    contributors: DS.attr({ defaultValue: function() { return []; } }),

    geoInfo: DS.attr({ defaultValue: function() { return {}; } }),

    mediaArray: DS.attr({ defaultValue: function() { return []; } }),

    mediaList: Ember.computed('mediaArray', function() {

        var res = [];

        var mp3 = null;

        _.forEach(this.get('mediaArray'), function(m) {

            if(m.format === 'audio/mpeg') {

                mp3 = m;

            } else if(m.format.startsWith('audio/')) {

                res.push(m);

            }

        });

        if(mp3) {

            res.unshift(mp3);

        }

        return res;

    }),

    duration: Ember.computed('mediaArray', function() {

        var self = this;

        var duration = 0;

        Object.keys(this.get('mediaArray')).forEach(function(key) {

            if (!duration && self.get('mediaArray')[key].extent_ms) {

                duration = self.get('mediaArray')[key].extent_ms;

            }

        });

        return duration / 1000;

    })

});