import Ember from 'ember';

export default Ember.Component.extend({

    classNames: ['transcript-component'],

    player: Ember.inject.service(),

    autoscrollElement : '.corpus-app-container',
    previousElement: 0,
    autoscroll: true,
    timeout: null,

    itemObserver: Ember.observer('player.item', function () {
        this.set('autoscroll', true);
    }),

    didInsertElement: function() {
        Ember.$('#' + this.elementId).parent().on('scroll', Ember.run.bind(this, this.onScroll));
    },

    onScroll: function() {
        this.set('autoscroll', false);
        Ember.$('#' + this.elementId).parent().off('scroll');
    },

    didUpdate: function() {
        var self = this;
        var target = Ember.$('.sentence.active');
        if(this.get('autoscroll') && target.length && target.attr('data-ember-action') !== this.get('previousElement')) {
            Ember.$('#' + self.elementId).parent().off('scroll');
            Ember.$(this.get('autoscrollElement')).animate({
                scrollTop: target.offset().top + Ember.$(this.get('autoscrollElement')).scrollTop() - Ember.$(this.get('autoscrollElement')).offset().top - 154
            }, 150, 'swing', function() {
                setTimeout(function() {
                    Ember.$('#' + self.elementId).parent().on('scroll', Ember.run.bind(self, self.onScroll));
                }, 100);
            });
            this.set('previousElement', target.attr('data-ember-action'));
        }
    },

    actions: {

        play: function(progress) {
            this.get('player').trigger('progressupdate', progress);
            this.get('player').set('playing', true);
        }

    }

});