/* --------------------------------------------------------------
 modal.js 2016-07-07
 Gambio GmbH
 http://www.gambio.de
 Copyright (c) 2016 Gambio GmbH
 Released under the GNU General Public License (Version 2)
 [http://www.gnu.org/licenses/gpl-2.0.html]
 --------------------------------------------------------------
 */

jse.libs.theme.modal = jse.libs.theme.modal || {};

/**
 * ## Honeygrid Modal Dialogs Library
 *
 * Library-function to open default modal layer.  This function depends on jQuery & jQuery UI.
 *
 * @module Honeygrid/Libs/modal
 * @exports jse.libs.theme.modal
 * @ignore
 */
(function (exports) {
    'use strict';

    var $body = $('body'),
        tplStore = [],
        extension = null,
        // Object for default buttons
        buttons = {
            yes: {
                name: jse.core.lang.translate('yes', 'buttons'),
                type: 'success',
                class: 'btn-success'
            },
            no: {
                name: jse.core.lang.translate('no', 'buttons'),
                type: 'fail',
                class: 'btn-default'
            },
            abort: {
                name: jse.core.lang.translate('abort', 'buttons'),
                type: 'fail',
                class: 'btn-default'
            },
            ok: {
                name: jse.core.lang.translate('ok', 'buttons'),
                type: 'success',
                class: 'btn-success'
            },
            close: {
                name: jse.core.lang.translate('close', 'buttons'),
                type: 'fail',
                class: 'btn-default'
            }
        };

    /**
     *    Function to get all form data stored inside
     *    the layer
     *
     *    @param        {object}    $self        jQuery selection of the layer
     *    @return    {json}                    Returns a JSON with all form data
     */
    var _getFormData = function ($self, checkform) {
        var $forms = $self
                .filter('form')
                .add($self.find('form')),
            formdata = {},
            valid = true,
            promises = [];

        if ($forms.length) {
            $forms.each(function () {
                var $form = $(this);

                if (checkform) {
                    var localDeferred = $.Deferred();
                    promises.push(localDeferred);
                    $form.trigger('validator.validate', {deferred: localDeferred});
                }

                formdata[$form.attr('name') || $form.attr('id') || ('form_' + new Date().getTime() * Math.random())]
                    = jse.libs.form.getData($form);
            });
        }

        return $.when
            .apply(undefined, promises)
            .then(function () {
                return formdata;
            }, function () {
                return formdata;
            })
            .promise();
    };

    /**
     *    Function to transform the custom buttons object (which is
     *    incompatible with jQuery UI) to a jQuery UI compatible format
     *
     *    @param        {object}    dataset        Custom buttons object for the dialog
     *    @param        {promise}    deferred    deferred-object to resolve / reject on close
     *    @return    {array}                    Returns a jQuery UI dialog compatible buttons array
     */
    var _genButtons = function (options, extensionDeferred) {

        // Check if buttons are available
        if (options.buttons) {

            var rejectHandler = extension.getRejectHandler,
                resolveHandler = extension.getResolveHandler;

            $.each(options.buttons, function (k, v) {

                // Setup click handler
                options.buttons[k].event = function () {
                    var $self = $(this);

                    // If a callback is given, execute it with
                    // the current scope
                    if (typeof v.callback === 'function') {
                        if (!v.callback.apply($self, [])) {
                            return false;
                        }
                    }

                    // Add the default behaviour
                    // for the close  functionality
                    // On fail, reject the deferred
                    // object, else resolve it
                    switch (v.type) {
                        case 'fail':
                            rejectHandler($self, extensionDeferred, _getFormData);
                            break;
                        case 'success':
                            resolveHandler($self, extensionDeferred, _getFormData);
                            break;
                        case 'link':
                            location.href = v.value;
                            break;
                        default:
                            break;
                    }
                };

            });

        }

    };


    var _finalizeLayer = function ($container, options) {
        // Prevent submit on enter in inner forms
        var $forms = $container.find('form');
        if ($forms.length) {
            $forms.on('submit', function (e) {
                e.preventDefault();
            });
        }

        if (window.gambio && window.gambio.widgets && window.gambio.widgets.init) {
            window.gambio.widgets.init($container);
        }
    };

    var _setLayer = function (name) {
        if (jse.libs.theme.modal[name]) {
            extension = jse.libs.theme.modal[name];
        } else {
            jse.core.debug.error('[MODAL] Can\'t set modal: "' + name + '". Extension doesn\'t exist');
        }
    };

    var _transferOptions = function (options) {
        var mapper = extension.getMapper(),
            result = {};

        $.each(options, function (k, v) {

            if (mapper[k] === false) {
                return true;
            } else if (mapper[k] === undefined) {
                result[k] = v;
            } else if (typeof mapper[k] === 'function') {
                var mapperResult = mapper[k](k, v);
                result[mapperResult[0]] = mapperResult[1];
            } else {
                result[mapper[k]] = v;
            }

        });

        return result;

    };

    var _getTemplate = function (options, iframe) {

        var $selection = [],
            deferred = $.Deferred();

        if (options.noTemplate) {
            deferred.resolve('');
        } else if (iframe) {
            deferred.resolve('<iframe width="100%" height="100%" frameborder="0" src="' + options.template + '" />');
        } else {
            if (options.storeTemplate && tplStore[options.template]) {
                deferred.resolve(tplStore[options.template]);
            } else {

                try {
                    $selection = $(options.template);
                } catch (err) {
                }

                if ($selection.length) {
                    deferred.resolve($selection.html());
                } else {
                    jse.libs.xhr.ajax({url: options.template, dataType: 'html'}).done(function (result) {
                        if (options.sectionSelector) {
                            result = $(result).find(options.sectionSelector).html();
                        }

                        if (options.storeTemplate) {
                            tplStore[options.template] = result;
                        }
                        deferred.resolve(result);
                    }).fail(function () {
                        deferred.reject();
                    });
                }
            }
        }

        return deferred;
    };

    var _createLayer = function (options, title, className, defbuttons, template) {
        // Setup defaults & deferred objects
        var deferred = $.Deferred(),
            promise = deferred.promise(),
            iframe = (template === 'iframe'),
            defaults = {
                title: title,
                dialogClass: className,
                modal: true,
                buttons: defbuttons || [],
                closeOnEscape: true,
                template: template || null,
                storeTemplate: false,
                closeX: true,
                closeOnOuter: true
            },
            instance = null,
            $forms = null,
            extensionDeferred = $.Deferred();

        // Merge custom settings with default settings
        options = options || {};
        options = $.extend({}, defaults, options);

        var tplRequest = _getTemplate(options, iframe).done(function (result) {

            extensionDeferred.done(function (result) {
                deferred.resolve(result);
            }).fail(function (result) {
                deferred.reject(result);
            });

            // Generate template
            options.template = $(Mustache.render(result, options));
            jse.libs.theme.helpers.setupWidgetAttr(options.template);
            options.template = $('<div>').append(options.template.clone()).html();

            // Generate default button object
            _genButtons(options, extensionDeferred);

            // Transfer options object to extension option object
            var originalOptions = $.extend({}, options);
            options = _transferOptions(options);

            // Call extension
            extension.openLayer(options, extensionDeferred, _getFormData, originalOptions);

            // Passthrough of the close method of the layer
            // to the layer caller
            promise.close = function (success) {
                extensionDeferred.close(success);
            };

        }).fail(function () {
            deferred.reject({error: 'Template not found'});
        });

        // Temporary close handler if the upper
        // deferred isn't finished now. It will be
        // overwritten after the layer opens
        if (!promise.close) {
            promise.close = function () {
                tplRequest.reject('Closed after opening');
            };
        }

        return promise;
    };


    /**
     *    Shortcut function for an alert-layer
     *    @param        {object}    options Options that are passed to the modal layer
     *    @return    {promise}            Returns a promise
     */
    var _alert = function (options) {
        return _createLayer(options, jse.core.lang.translate('hint', 'labels'), '', [buttons.close], '#modal_alert');
    };

    /**
     *    Shortcut function for an confirm-layer
     *    @param        {object}    options Options that are passed to the modal layer
     *    @return    {promise}            Returns a promise
     */
    var _confirm = function (options) {
        return _createLayer(options, jse.core.lang.translate('confirm', 'labels'), 'confirm_dialog', [
            buttons.yes,
            buttons.no
        ], '#modal_alert');
    };

    /**
     *    Shortcut function for a prompt-layer
     *    @param        {object}    options Options that are passed to the modal layer
     *    @return    {promise}            Returns a promise
     */
    var _prompt = function (options) {
        return _createLayer(options, jse.core.lang.translate('prompt', 'labels'), 'prompt_dialog', [
            buttons.ok,
            buttons.abort
        ], '#modal_prompt');
    };

    /**
     *    Shortcut function for an success-layer
     *    @param        {object}    options Options that are passed to the modal layer
     *    @return    {promise}            Returns a promise
     */
    var _success = function (options) {
        return _createLayer(options, jse.core.lang.translate('success', 'labels'), 'success_dialog', [], '#modal_alert');
    };

    /**
     *    Shortcut function for an error-layer
     *    @param        {object}    options Options that are passed to the modal layer
     *    @return    {promise}            Returns a promise
     */
    var _error = function (options) {
        return _createLayer(options, jse.core.lang.translate('errors', 'labels'), 'error_dialog', [], '#modal_alert');
    };

    /**
     *    Shortcut function for a warning-layer
     *    @param        {object}    options Options that are passed to the modal layer
     *    @return    {promise}            Returns a promise
     */
    var _warn = function (options) {
        return _createLayer(options, jse.core.lang.translate('warning', 'labels'), 'warn_dialog', [], '#modal_alert');
    };

    /**
     *    Shortcut function for an info-layer
     *    @param        {object}    options Options that are passed to the modal layer
     *    @return    {promise}            Returns a promise
     */
    var _info = function (options) {
        return _createLayer(options, jse.core.lang.translate('info', 'labels'), 'info_dialog', [], '#modal_alert');
    };

    /**
     *    Shortcut function for an iframe-layer
     *    @param        {object}    options Options that are passed to the modal layer
     *    @return    {promise}            Returns a promise
     */
    var _iframe = function (options) {
        if (options.convertModal) {
            jse.libs.theme.modal[options.convertModal](options, jse.core.lang.translate('info', 'labels'),
                options.convertModal + '_dialog', [], '#modal_alert');
            return;
        }

        return _createLayer(options, jse.core.lang.translate('info', 'labels'), 'iframe_layer', [], 'iframe');
    };

// ########## VARIABLE EXPORT ##########

    exports.error = _error;
    exports.warn = _warn;
    exports.info = _info;
    exports.success = _success;
    exports.alert = _alert;
    exports.prompt = _prompt;
    exports.confirm = _confirm;
    exports.iframe = _iframe;
    exports.custom = _createLayer;
    exports.setLayer = _setLayer;
    exports.finalizeLayer = _finalizeLayer;

    // Set default layer.
    var currentTimestamp = Date.now,
        lifetime = 10000; // 10 sec

    extension = jse.core.registry.get('mainModalLayer');

    var intv = setInterval(function () {
        if (jse.libs.theme.modal[extension] !== undefined) {
            _setLayer(extension);
            clearInterval(intv);
        }

        if (Date.now - currentTimestamp > lifetime) {
            throw new Error('Modal extension was not loaded: ' + extension);
        }
    }, 300);


}(jse.libs.theme.modal));

jse.libs.template = jse.libs.template || {};
jse.libs.template.modal = jse.libs.theme.modal;