(function(define, undefined) {
    'use strict';
    define([
        'jquery', 'underscore', 'backbone', 'js/edxnotes/utils/template',
        'js/edxnotes/utils/logger'
    ], function($, _, Backbone, templateUtils, NotesLogger) {
        var NoteItemView = Backbone.View.extend({
            tagName: 'article',
            className: 'note',
            id: function() {
                return 'note-' + _.uniqueId();
            },
            events: {
                'click .note-excerpt-more-link': 'moreHandler',
                'click .reference-unit-link': 'unitLinkHandler',
                'click .reference-tags': 'tagHandler'
            },

            initialize: function(options) {
                this.options = _.extend({}, options);
                this.template = templateUtils.loadTemplate('note-item');
                this.logger = NotesLogger.getLogger('note_item', options.debug);
                this.listenTo(this.model, 'change:is_expanded', this.render);
            },

            render: function() {
                var context = this.getContext();
                this.$el.html(this.template(context));

                return this;
            },

            getContext: function() {
                return $.extend({}, this.model.toJSON(), {
                    message: this.model.getQuote()
                });
            },

            toggleNote: function() {
                var value = !this.model.get('is_expanded');
                this.model.set('is_expanded', value);
            },

            moreHandler: function(event) {
                event.preventDefault();
                this.toggleNote();
            },

            unitLinkHandler: function(event) {
                var REQUEST_TIMEOUT = 2000;
                event.preventDefault();
                this.logger.emit('edx.course.student_notes.used_unit_link', {
                    'note_id': this.model.get('id'),
                    'component_usage_id': this.model.get('usage_id'),
                    'view': this.options.view
                }, REQUEST_TIMEOUT).always(_.bind(function() {
                    this.redirectTo(event.target.href);
                }, this));
            },

            tagHandler: function(event) {
                event.preventDefault();
                if (!_.isUndefined(this.options.scrollToTag)) {
                    this.options.scrollToTag(event.currentTarget.text);
                }
            },

            redirectTo: function(uri) {
                window.location = uri;
            },

            remove: function() {
                this.logger.destroy();
                Backbone.View.prototype.remove.call(this);
                return this;
            }
        });

        return NoteItemView;
    });
}).call(this, define || RequireJS.define);
