import DS from 'ember-data';

import Ember from 'ember';

import _ from 'lodash/lodash';

import * as utils from 'corpus-common-addon/utils/utils';

export default DS.Model.extend({

    //id: attr('string'),

    uri: DS.attr('string'),

    title: DS.attr('string'),

    language: DS.attr('string'),

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

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

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

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

    encodedId: Ember.computed('id', function() {

      return encodeURIComponent(this.get('id'));

    }),

    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;

    }),

    addContributor: function(contrib_def) {

        var contributors = this.get('contributors');

        if(_.findIndex(contributors, function(c) { return _.isEqual(c, contrib_def);}) < 0) {

            contributors.pushObject(contrib_def);

        }

        // must set dirty

        this.set('contributors', _.clone(this.get('contributors')));

    },

    removeContributor: function(contrib_def) {

        var contributors = this.get('contributors');

        var index = _.findIndex(contributors, function(c) { return _.isEqual(c, contrib_def);});

        if(index >= 0) {

            contributors.removeAt(index);

        }

        //must set dirty

        this.set('contributors', _.clone(this.get('contributors')));

    },

    saveContributor: function(contrib_def, index) {

        var contributors = this.get('contributors');

        if(index < 0 || index >= contributors.length) {

            return;

        }

        var contrib_def_map = {name: contrib_def.name||'', url: contrib_def.url||'', role: contrib_def.role||''};

        var existingContribs = _.filter(contributors, function(c, i) {

            return (i!==index && _.isEqual({name: c.name||'', url: c.url||'', role: c.role||''}, contrib_def_map));

        });

        if(existingContribs.length > 0) {

            // contributor exists, remove contributor @ index

            contributors.removeAt(index);

        }

        else {

            contributors[index] = contrib_def;

        }

        //must set dirty only if needed

        this.set('contributors', _.clone(this.get('contributors')));

    },

    removeSubject: function(subject_def) {

        var subjects = this.get('subjects');

        var index = _.findIndex(subjects, function(s) { return _.isEqual(s, subject_def);});

        if(index >= 0) {

            subjects.removeAt(index);

        }

        //must set dirty

        this.set('subjects', _.clone(subjects));

    },

    addSubject: function(subject_def) {

        var subjects = this.get('subjects');

        if(_.findIndex(subjects, function(s) { return _.isEqual(s, subject_def) || _.isEqual(s, utils.switchArkBnfLink(subject_def));}) < 0) {

            subjects.pushObject(subject_def);

        }

        // must set dirty

        this.set('subjects', _.clone(subjects));

    }

});