/*
 * vim: ts=4:sw=4:expandtab
 */
(function () {
    'use strict';
    window.Whisper = window.Whisper || {};

    var URL_REGEX = /(^|[\s\n]|<br\/?>)((?:https?|ftp):\/\/[\-A-Z0-9\u00A0-\uD7FF\uE000-\uFDCF\uFDF0-\uFFFD+\u0026\u2019@#\/%?=()~_|!:,.;]*[\-A-Z0-9+\u0026@#\/%=~()_|])/gi;

    var ErrorIconView = Whisper.View.extend({
        templateName: 'error-icon',
        className: 'error-icon-container',
        initialize: function() {
            if (this.model.name === 'UnregisteredUserError') {
                this.$el.addClass('unregistered-user-error');
            }
        }
    });
    var NetworkErrorView = Whisper.View.extend({
        tagName: 'span',
        className: 'hasRetry',
        templateName: 'hasRetry',
        render_attributes: {
            messageNotSent: i18n('messageNotSent'),
            resend: i18n('resend')
        }
    });

    Whisper.MessageView = Whisper.View.extend({
        tagName:   'li',
        templateName: 'message',
        initialize: function() {
            this.listenTo(this.model, 'change:errors', this.onErrorsChanged);
            this.listenTo(this.model, 'change:body', this.render);
            this.listenTo(this.model, 'change:delivered', this.renderDelivered);
            this.listenTo(this.model, 'change', this.renderSent);
            this.listenTo(this.model, 'change:flags change:group_update', this.renderControl);
            this.listenTo(this.model, 'destroy', this.remove);
            this.listenTo(this.model, 'pending', this.renderPending);
            this.listenTo(this.model, 'done', this.renderDone);
            this.timeStampView = new Whisper.ExtendedTimestampView();
        },
        events: {
            'click .retry': 'retryMessage',
            'click .error-icon': 'select',
            'click .timestamp': 'select',
            'click .status': 'select',
            'click .error-message': 'select'
        },
        retryMessage: function() {
            var retrys = _.filter(this.model.get('errors'), function(e) {
                return (e.name === 'MessageError' ||
                        e.name === 'OutgoingMessageError' ||
                        e.name === 'SendMessageNetworkError');
            });
            _.map(retrys, 'number').forEach(function(number) {
                this.model.resend(number);
            }.bind(this));
        },
        select: function(e) {
            this.$el.trigger('select', {message: this.model});
            e.stopPropagation();
        },
        className: function() {
            return ['entry', this.model.get('type')].join(' ');
        },
        renderPending: function() {
            this.$el.addClass('pending');
        },
        renderDone: function() {
            this.$el.removeClass('pending');
        },
        renderSent: function() {
            if (this.model.isOutgoing()) {
                this.$el.toggleClass('sent', !!this.model.get('sent'));
            }
        },
        renderDelivered: function() {
            if (this.model.get('delivered')) { this.$el.addClass('delivered'); }
        },
        onErrorsChanged: function() {
            if (this.model.isIncoming()) {
                this.render();
            } else {
                this.renderErrors();
            }
        },
        renderErrors: function() {
            var errors = this.model.get('errors');
            if (_.size(errors) > 0) {
                if (this.model.isIncoming()) {
                    this.$('.content').text(this.model.getDescription()).addClass('error-message');
                }
                var view = new ErrorIconView({ model: errors[0] });
                view.render().$el.appendTo(this.$('.bubble'));
            } else {
                this.$('.error-icon-container').remove();
            }
            if (this.model.hasNetworkError()) {
                this.$('.meta').prepend(new NetworkErrorView().render().el);
            } else {
                this.$('.meta .hasRetry').remove();
            }
        },
        renderControl: function() {
            if (this.model.isEndSession() || this.model.isGroupUpdate()) {
                this.$el.addClass('control');
                var content = this.$('.content');
                content.text(this.model.getDescription());
                emoji_util.parse(content);
            } else {
                this.$el.removeClass('control');
            }
        },
        render: function() {
            var contact = this.model.isIncoming() ? this.model.getContact() : null;
            this.$el.html(
                Mustache.render(_.result(this, 'template', ''), {
                    message: this.model.get('body'),
                    timestamp: this.model.get('sent_at'),
                    sender: (contact && contact.getTitle()) || '',
                    avatar: (contact && contact.getAvatar()),
                }, this.render_partials())
            );
            this.timeStampView.setElement(this.$('.timestamp'));
            this.timeStampView.update();

            this.renderControl();

            var body = this.$('.body');

            emoji_util.parse(body);

            if (body.length > 0) {
                var escaped = body.html();
                body.html(escaped.replace(/\n/g, '<br>').replace(URL_REGEX, "$1<a href='$2' target='_blank'>$2</a>"));
            }

            this.renderSent();
            this.renderDelivered();
            this.renderErrors();
            this.loadAttachments();

            return this;
        },
        loadAttachments: function() {
            this.model.get('attachments').forEach(function(attachment) {
                var view = new Whisper.AttachmentView({ model: attachment });
                this.listenTo(view, 'update', function() {
                    if (!view.el.parentNode) {
                        this.trigger('beforeChangeHeight');
                        this.$('.attachments').append(view.el);
                        this.trigger('afterChangeHeight');
                    }
                });
                view.render();
            }.bind(this));
        }
    });

})();