/*
 * 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.$el.addClass('unregistered-user-error');
            }
        }
    });
    var NetworkErrorView = Whisper.View.extend({
        tagName: 'span',
        className: 'hasRetry',
        templateName: 'hasRetry',
        render_attributes: {
            messageNotSent: i18n('messageNotSent'),
            resend: i18n('resend')
        }
    });
    var TimerView = Whisper.View.extend({
        templateName: 'hourglass',
        update: function() {
            if (this.timeout) {
              clearTimeout(this.timeout);
              this.timeout = null;
            }
            if (this.model.isExpired()) {
                return this;
            }
            if (this.model.isExpiring()) {
                this.render();
                var totalTime = this.model.get('expireTimer') * 1000;
                var remainingTime = this.model.msTilExpire();
                var elapsed = (totalTime - remainingTime) / totalTime;
                this.$('.sand').css('transform', 'translateY(' + elapsed*100 + '%)');
                this.$el.css('display', 'inline-block');
                this.timeout = setTimeout(this.update.bind(this), Math.max(totalTime / 100, 500));
            }
            return this;
        }
    });

    Whisper.ExpirationTimerUpdateView = Whisper.View.extend({
        tagName:   'li',
        className: 'expirationTimerUpdate advisory',
        templateName: 'expirationTimerUpdate',
        id: function() {
            return this.model.id;
        },
        initialize: function() {
            this.conversation = this.model.getExpirationTimerUpdateSource();
            this.listenTo(this.conversation, 'change', this.render);
        },
        render_attributes: function() {
            var seconds = this.model.get('expirationTimerUpdate').expireTimer;
            var timerMessage;
            if (this.conversation.id === textsecure.storage.user.getNumber()) {
                timerMessage = i18n('youChangedTheTimer',
                  Whisper.ExpirationTimerOptions.getName(seconds));
            } else {
                timerMessage = i18n('theyChangedTheTimer', [
                  this.conversation.getTitle(),
                  Whisper.ExpirationTimerOptions.getName(seconds)]);
            }
            return { content: timerMessage };
        }
    });

    Whisper.KeyChangeView = Whisper.View.extend({
        tagName:   'li',
        className: 'keychange',
        templateName: 'keychange',
        id: function() {
            return this.model.id;
        },
        initialize: function() {
            this.conversation = this.model.getModelForKeyChange();
            this.listenTo(this.conversation, 'change', this.render);
        },
        events: {
            'click .content': 'showIdentity'
        },
        render_attributes: function() {
            return {
              content: this.model.getNotificationText()
            };
        },
        showIdentity: function() {
            this.$el.trigger('show-identity', this.conversation);
        }
    });

    Whisper.MessageView = Whisper.View.extend({
        tagName:   'li',
        templateName: 'message',
        id: function() {
            return this.model.id;
        },
        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:expirationStartTimestamp', this.renderExpiring);
            this.listenTo(this.model, 'change', this.renderSent);
            this.listenTo(this.model, 'change:flags change:group_update', this.renderControl);
            this.listenTo(this.model, 'destroy', this.onDestroy);
            this.listenTo(this.model, 'expired', this.onExpired);
            this.listenTo(this.model, 'pending', this.renderPending);
            this.listenTo(this.model, 'done', this.renderDone);
            this.timeStampView = new Whisper.ExtendedTimestampView();

            this.contact = this.model.isIncoming() ? this.model.getContact() : null;
            if (this.contact) {
                this.listenTo(this.contact, 'change:color', this.updateColor);
            }
        },
        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'),
                    this.model.isReplayableError.bind(this.model));
            _.map(retrys, 'number').forEach(function(number) {
                this.model.resend(number);
            }.bind(this));
        },
        onExpired: function() {
            this.$el.addClass('expired');
            this.$el.find('.bubble').one('webkitAnimationEnd animationend', function(e) {
                if (e.target === this.$('.bubble')[0]) {
                  this.remove();
                }
            }.bind(this));

            // Failsafe: if in the background, animation events don't fire
            setTimeout(this.remove.bind(this), 1000);
        },
        onDestroy: function() {
            if (this.$el.hasClass('expired')) {
              return;
            }
            this.remove();
        },
        select: function(e) {
            this.$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.$el.removeClass('control');
            }
        },
        renderExpiring: function() {
            if (!this.timerView) {
              this.timerView = new TimerView({ model: this.model });
            }
            this.timerView.setElement(this.$('.timer'));
            this.timerView.update();
        },
        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.renderExpiring();

            this.loadAttachments();

            return this;
        },
        updateColor: function(model, color) {
            var bubble = this.$('.bubble');
            bubble.removeClass(Whisper.Conversation.COLORS);
            if (color) {
                bubble.addClass(color);
            }
            var avatarView = new (Whisper.View.extend({
                templateName: 'avatar',
                render_attributes: { avatar: model.getAvatar() }
            }))();
            this.$('.avatar').replaceWith(avatarView.render().$('.avatar'));
        },
        appendAttachmentView: function(view) {
            // We check for a truthy 'updated' here to ensure that a race condition in a
            //   multi-fetch() scenario doesn't add an AttachmentView to the DOM before
            //   its 'update' event is triggered.
            var parent = this.$('.attachments')[0];
            if (view.updated && parent !== view.el.parentNode) {
                if (view.el.parentNode) {
                    view.el.parentNode.removeChild(view.el);
                }

                this.trigger('beforeChangeHeight');
                this.$('.attachments').append(view.el);
                view.setElement(view.el);
                this.trigger('afterChangeHeight');
            }
        },
        loadAttachments: function() {
            this.loadedAttachments = this.loadedAttachments || [];

            // If we're called a second time, render() has replaced the DOM out from under
            //   us with $el.html(). We'll need to reattach our AttachmentViews to the new
            //   parent DOM nodes if the 'update' event has already fired.
            if (this.loadedAttachments.length) {
                for (var i = 0, max = this.loadedAttachments.length; i < max; i += 1) {
                    var view = this.loadedAttachments[i];
                    this.appendAttachmentView(view);
                }
                return;
            }

            this.model.get('attachments').forEach(function(attachment) {
                var view = new Whisper.AttachmentView({
                  model: attachment,
                  timestamp: this.model.get('sent_at')
                });
                this.loadedAttachments.push(view);

                this.listenTo(view, 'update', function() {
                    view.updated = true;
                    this.appendAttachmentView(view);
                });

                view.render();
            }.bind(this));
        }
    });

})();