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

    Whisper.KeyVerificationPanelView = Whisper.View.extend({
        className: 'key-verification panel',
        templateName: 'key-verification',
        events: {
            'click button.verify': 'toggleVerified',
        },
        initialize: function(options) {
            this.ourNumber = textsecure.storage.user.getNumber();
            if (options.newKey) {
              this.theirKey = options.newKey;
            }

            this.loadKeys().then(function() {
                this.listenTo(this.model, 'change', this.render);
            }.bind(this));
        },
        loadKeys: function() {
            return Promise.all([
                this.loadTheirKey(),
                this.loadOurKey(),
            ]).then(this.generateSecurityNumber.bind(this))
              .then(this.render.bind(this));
              //.then(this.makeQRCode.bind(this));
        },
        makeQRCode: function() {
            // Per Lilia: We can't turn this on until it generates a Latin1 string, as is
            //   required by the mobile clients.
            new QRCode(this.$('.qr')[0]).makeCode(
                dcodeIO.ByteBuffer.wrap(this.ourKey).toString('base64')
            );
        },
        loadTheirKey: function() {
            return textsecure.storage.protocol.loadIdentityKey(
                this.model.id
            ).then(function(theirKey) {
                this.theirKey = theirKey;
            }.bind(this));
        },
        loadOurKey: function() {
            return textsecure.storage.protocol.loadIdentityKey(
                this.ourNumber
            ).then(function(ourKey) {
                this.ourKey = ourKey;
            }.bind(this));
        },
        generateSecurityNumber: function() {
            return new libsignal.FingerprintGenerator(5200).createFor(
                this.ourNumber, this.ourKey, this.model.id, this.theirKey
            ).then(function(securityNumber) {
                this.securityNumber = securityNumber;
            }.bind(this));
        },
        onSafetyNumberChanged: function() {
            this.model.getProfiles().then(this.loadKeys.bind(this));

            var dialog = new Whisper.ConfirmationDialogView({
                message: i18n('changedRightAfterVerify', [this.model.getTitle(), this.model.getTitle()]),
                hideCancel: true
            });

            dialog.$el.insertBefore(this.el);
            dialog.focusCancel();
        },
        toggleVerified: function() {
            this.$('button.verify').attr('disabled', true);
            this.model.toggleVerified().catch(function(result) {
                if (result instanceof Error) {
                    if (result.name === 'OutgoingIdentityKeyError') {
                        this.onSafetyNumberChanged();
                    } else {
                        console.log('failed to toggle verified:', result.stack);
                    }
                } else {
                    var keyError = _.some(result.errors, function(error) {
                        return error.name === 'OutgoingIdentityKeyError';
                    });
                    if (keyError) {
                        this.onSafetyNumberChanged();
                    } else {
                        _.forEach(result.errors, function(error) {
                            console.log('failed to toggle verified:', error.stack);
                        });
                    }
                }
            }.bind(this)).then(function() {
                this.$('button.verify').removeAttr('disabled');
            }.bind(this));
        },
        render_attributes: function() {
            var s = this.securityNumber;
            var chunks = [];
            for (var i = 0; i < s.length; i += 5) {
                chunks.push(s.substring(i, i+5));
            }
            var name = this.model.getTitle();
            var yourSafetyNumberWith = i18n('yourSafetyNumberWith', name);
            var isVerified = this.model.isVerified();
            var verifyButton = isVerified ? i18n('unverify') : i18n('verify');
            var verifiedStatus = isVerified ? i18n('isVerified', name) : i18n('isNotVerified', name);

            return {
                learnMore            : i18n('learnMore'),
                theirKeyUnknown      : i18n('theirIdentityUnknown'),
                yourSafetyNumberWith : i18n('yourSafetyNumberWith', this.model.getTitle()),
                verifyHelp           : i18n('verifyHelp', this.model.getTitle()),
                verifyButton         : verifyButton,
                hasTheirKey          : this.theirKey !== undefined,
                chunks               : chunks,
                isVerified           : isVerified,
                verifiedStatus       : verifiedStatus
            };
        }
    });
})();