/* ----------------------------------------------------------------------------
 * Easy!Appointments - Open Source Web Scheduler
 *
 * @package     EasyAppointments
 * @author      A.Tselegidis <alextselegidis@gmail.com>
 * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
 * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
 * @link        http://easyappointments.org
 * @since       v1.0.0
 * ---------------------------------------------------------------------------- */

(function() {

    'use strict';

    /**
     * Providers Helper
     *
     * This class contains the Providers helper class declaration, along with the "Providers" tab
     * event handlers. By deviding the backend/users tab functionality into separate files
     * it is easier to maintain the code.
     *
     * @class ProvidersHelper
     */
    var ProvidersHelper = function() {
        this.filterResults = {}; // Store the results for later use.
    };

    /**
     * Bind the event handlers for the backend/users "Providers" tab.
     */
    ProvidersHelper.prototype.bindEventHandlers = function() {
        /**
         * Event: Filter Providers Form "Submit"
         *
         * Filter the provider records with the given key string.
         */
        $('#providers').on('submit', '#filter-providers form', function() {
            var key = $('#filter-providers .key').val();
            $('.selected').removeClass('selected');
            this.resetForm();
            this.filter(key);
            return false;
        }.bind(this));

        /**
         * Event: Clear Filter Button "Click"
         */
        $('#providers').on('click', '#filter-providers .clear', function() {
            this.filter('');
            $('#filter-providers .key').val('');
            this.resetForm();
        }.bind(this));

        /**
         * Event: Filter Provider Row "Click"
         *
         * Display the selected provider data to the user.
         */
        $('#providers').on('click', '.provider-row', function(e) {
            if ($('#filter-providers .filter').prop('disabled')) {
                $('#filter-providers .results').css('color', '#AAA');
                return; // Exit because we are currently on edit mode.
            }

            var providerId = $(e.currentTarget).attr('data-id');
            var provider = {};

            $.each(this.filterResults, function(index, item) {
                if (item.id === providerId) {
                    provider = item;
                    return false;
                }
            });

            this.display(provider);
            $('#filter-providers .selected').removeClass('selected');
            $(e.currentTarget).addClass('selected');
            $('#edit-provider, #delete-provider').prop('disabled', false);
        }.bind(this));

        /**
         * Event: Add New Provider Button "Click"
         */
        $('#providers').on('click', '#add-provider', function() {
            this.resetForm();
            $('#filter-providers button').prop('disabled', true);
            $('#filter-providers .results').css('color', '#AAA');
            $('#providers .add-edit-delete-group').hide();
            $('#providers .save-cancel-group').show();
            $('#providers .record-details').find('input, textarea').prop('readonly', false);
            $('#provider-password, #provider-password-confirm').addClass('required');
            $('#provider-notifications').prop('disabled', false);
            $('#providers').find('.add-break, .edit-break, .delete-break, #reset-working-plan').prop('disabled', false);
            $('#provider-services input[type="checkbox"]').prop('disabled', false);
            $('#providers input[type="checkbox"]').prop('disabled', false);

            // Apply default working plan
            BackendUsers.wp.setup(GlobalVariables.workingPlan);
            BackendUsers.wp.timepickers(false);
        }.bind(this));

        /**
         * Event: Edit Provider Button "Click"
         */
        $('#providers').on('click', '#edit-provider', function() {
            $('#providers .add-edit-delete-group').hide();
            $('#providers .save-cancel-group').show();
            $('#filter-providers button').prop('disabled', true);
            $('#filter-providers .results').css('color', '#AAA');
            $('#providers .record-details').find('input, textarea').prop('readonly', false);
            $('#provider-password, #provider-password-confirm').removeClass('required');
            $('#provider-notifications').prop('disabled', false);
            $('#provider-services input[type="checkbox"]').prop('disabled', false);
            $('#providers').find('.add-break, .edit-break, .delete-break, #reset-working-plan').prop('disabled', false);
            $('#providers input[type="checkbox"]').prop('disabled', false);
            BackendUsers.wp.timepickers(false);
        });

        /**
         * Event: Delete Provider Button "Click"
         */
        $('#providers').on('click', '#delete-provider', function() {
            var providerId = $('#provider-id').val();

            var messageBtns = {};
            messageBtns[EALang['delete']] = function() {
                this.delete(providerId);
                $('#message_box').dialog('close');
            }.bind(this);
            messageBtns[EALang['cancel']] = function() {
                $('#message_box').dialog('close');
            };

            GeneralFunctions.displayMessageBox(EALang['delete_provider'],
                    EALang['delete_record_prompt'], messageBtns);
        }.bind(this));

        /**
         * Event: Save Provider Button "Click"
         */
        $('#providers').on('click', '#save-provider', function() {
            var provider = {
                first_name: $('#provider-first-name').val(),
                last_name: $('#provider-last-name').val(),
                email: $('#provider-email').val(),
                mobile_number: $('#provider-mobile-number').val(),
                phone_number: $('#provider-phone-number').val(),
                address: $('#provider-address').val(),
                city: $('#provider-city').val(),
                state: $('#provider-state').val(),
                zip_code: $('#provider-zip-code').val(),
                notes: $('#provider-notes').val(),
                settings: {
                    username: $('#provider-username').val(),
                    working_plan: JSON.stringify(BackendUsers.wp.get()),
                    notifications: $('#provider-notifications').hasClass('active')
                }
            };

            // Include provider services.
            provider.services = [];
            $('#provider-services input[type="checkbox"]').each(function() {
                if ($(this).prop('checked')) {
                    provider.services.push($(this).attr('data-id'));
                }
            });

            // Include password if changed.
            if ($('#provider-password').val() !== '') {
                provider.settings.password = $('#provider-password').val();
            }

            // Include id if changed.
            if ($('#provider-id').val() !== '') {
                provider.id = $('#provider-id').val();
            }

            if (!this.validate(provider)) {
                return;
            }

            this.save(provider);
        }.bind(this));

        /**
         * Event: Cancel Provider Button "Click"
         *
         * Cancel add or edit of an provider record.
         */
        $('#providers').on('click', '#cancel-provider', function() {
            var id = $('#filter-providers .selected').attr('data-id');
            this.resetForm();
            if (id != '') {
                this.select(id, true);
            }
        }.bind(this));

        /**
         * Event: Display Provider Details "Click"
         */
        $('#providers').on('click', '.display-details', function() {
            $('#providers .switch-view .current').removeClass('current');
            $(this).addClass('current');
            $('.working-plan-view').hide('fade', function() {
                $('.details-view').show('fade');
            });
        });

        /**
         * Event: Display Provider Working Plan "Click"
         */
        $('#providers').on('click', '.display-working-plan', function() {
            $('#providers .switch-view .current').removeClass('current');
            $(this).addClass('current');
            $('.details-view').hide('fade', function() {
                $('.working-plan-view').show('fade');
            });
        });

        /**
         * Event: Reset Working Plan Button "Click".
         */
        $('#providers').on('click', '#reset-working-plan', function() {
            $('.breaks').empty();
            $('.work-start, .work-end').val('');
            BackendUsers.wp.setup(GlobalVariables.workingPlan);
            BackendUsers.wp.timepickers(false);
        });
    };

    /**
     * Save provider record to database.
     *
     * @param {Object} provider Contains the admin record data. If an 'id' value is provided
     * then the update operation is going to be executed.
     */
    ProvidersHelper.prototype.save = function(provider) {
        var postUrl = GlobalVariables.baseUrl + '/index.php/backend_api/ajax_save_provider';
        var postData = {
            csrfToken: GlobalVariables.csrfToken,
            provider: JSON.stringify(provider)
        };

        $.post(postUrl, postData, function(response) {
            if (!GeneralFunctions.handleAjaxExceptions(response)) {
                return;
            }
            Backend.displayNotification(EALang['provider_saved']);
            this.resetForm();
            $('#filter-providers .key').val('');
            this.filter('', response.id, true);
        }.bind(this), 'json').fail(GeneralFunctions.ajaxFailureHandler);
    };

    /**
     * Delete a provider record from database.
     *
     * @param {Number} id Record id to be deleted.
     */
    ProvidersHelper.prototype.delete = function(id) {
        var postUrl = GlobalVariables.baseUrl + '/index.php/backend_api/ajax_delete_provider';
        var postData = {
            csrfToken: GlobalVariables.csrfToken,
            provider_id: id
        };

        $.post(postUrl, postData, function(response) {
            if (!GeneralFunctions.handleAjaxExceptions(response)) {
                return;
            }
            Backend.displayNotification(EALang['provider_deleted']);
            this.resetForm();
            this.filter($('#filter-providers .key').val());
        }.bind(this), 'json').fail(GeneralFunctions.ajaxFailureHandler);
    };

    /**
     * Validates a provider record.
     *
     * @param {Object} provider Contains the admin data to be validated.
     *
     * @return {Boolean} Returns the validation result.
     */
    ProvidersHelper.prototype.validate = function(provider) {
        $('#providers .required').css('border', '');
        $('#provider-password, #provider-password-confirm').css('border', '');

        try {
            // Validate required fields.
            var missingRequired = false;
            $('#providers .required').each(function() {
                if ($(this).val() == '' || $(this).val() == undefined) {
                    $(this).css('border', '2px solid red');
                    missingRequired = true;
                }
            });
            if (missingRequired) {
                throw EALang['fields_are_required'];
            }

            // Validate passwords.
            if ($('#provider-password').val() != $('#provider-password-confirm').val()) {
                $('#provider-password, #provider-password-confirm').css('border', '2px solid red');
                throw EALang['passwords_mismatch'];
            }

            if ($('#provider-password').val().length < BackendUsers.MIN_PASSWORD_LENGTH
                    && $('#provider-password').val() != '') {
                $('#provider-password, #provider-password-confirm').css('border', '2px solid red');
                throw EALang['password_length_notice'].replace('$number', BackendUsers.MIN_PASSWORD_LENGTH);
            }

            // Validate user email.
            if (!GeneralFunctions.validateEmail($('#provider-email').val())) {
                $('#provider-email').css('border', '2px solid red');
                throw EALang['invalid_email'];
            }

            // Check if username exists
            if ($('#provider-username').attr('already-exists') ==  'true') {
                $('#provider-username').css('border', '2px solid red');
                throw EALang['username_already_exists'];
            }

            return true;
        } catch(exc) {
            $('#providers .form-message').text(exc);
            $('#providers .form-message').show();
            return false;
        }
    };

    /**
     * Resets the admin tab form back to its initial state.
     */
    ProvidersHelper.prototype.resetForm = function() {
        $('#filter-providers .selected').removeClass('selected');
        $('#filter-providers button').prop('disabled', false);
        $('#filter-providers .results').css('color', '');

        $('#providers .add-edit-delete-group').show();
        $('#providers .save-cancel-group').hide();
        $('#providers .record-details h3 a').remove();
        $('#providers .record-details').find('input, textarea').prop('readonly', true);
        $('#providers .form-message').hide();
        $('#provider-notifications').removeClass('active');
        $('#provider-notifications').prop('disabled', true);
        $('#provider-services input[type="checkbox"]').prop('disabled', true);
        $('#providers .required').css('border', '');
        $('#provider-password, #provider-password-confirm').css('border', '');
        $('#providers .add-break, #reset-working-plan').prop('disabled', true);
        BackendUsers.wp.timepickers(true);
        $('#providers .working-plan input[type="text"]').timepicker('destroy');
        $('#providers .working-plan input[type="checkbox"]').prop('disabled', true);
        $('.breaks').find('.edit-break, .delete-break').prop('disabled', true);

        $('#edit-provider, #delete-provider').prop('disabled', true);
        $('#providers .record-details').find('input, textarea').val('');
        $('#providers input[type="checkbox"]').prop('checked', false);
        $('#provider-services input[type="checkbox"]').prop('checked', false);
        $('#provider-services a').remove();
        $('#providers .breaks tbody').empty();
    };

    /**
     * Display a provider record into the admin form.
     *
     * @param {Object} provider Contains the provider record data.
     */
    ProvidersHelper.prototype.display = function(provider) {
        $('#provider-id').val(provider.id);
        $('#provider-first-name').val(provider.first_name);
        $('#provider-last-name').val(provider.last_name);
        $('#provider-email').val(provider.email);
        $('#provider-mobile-number').val(provider.mobile_number);
        $('#provider-phone-number').val(provider.phone_number);
        $('#provider-address').val(provider.address);
        $('#provider-city').val(provider.city);
        $('#provider-state').val(provider.state);
        $('#provider-zip-code').val(provider.zip_code);
        $('#provider-notes').val(provider.notes);

        $('#provider-username').val(provider.settings.username);
        if (provider.settings.notifications == true) {
            $('#provider-notifications').addClass('active');
        } else {
            $('#provider-notifications').removeClass('active');
        }

         // Add dedicated provider link. 
        var dedicatedUrl = GlobalVariables.baseUrl + '/index.php?provider=' + encodeURIComponent(provider.id); 
        var linkHtml = '<a href="' + dedicatedUrl + '"><span class="glyphicon glyphicon-link"></span></a>';
        $('#providers .record-details h3')
            .find('a')
            .remove()
            .end()
            .append(linkHtml);

        $('#provider-services a').remove();
        $('#provider-services input[type="checkbox"]').prop('checked', false);
        $.each(provider.services, function(index, serviceId) {
            $('#provider-services input[type="checkbox"]').each(function() {
                if ($(this).attr('data-id') == serviceId) {
                    $(this).prop('checked', true);
                    // Add dedicated service-provider link.
                    dedicatedUrl = GlobalVariables.baseUrl + '/index.php?provider=' + encodeURIComponent(provider.id) 
                            + '&service=' + encodeURIComponent(serviceId);
                    linkHtml = '<a href="' + dedicatedUrl + '"><span class="glyphicon glyphicon-link"></span></a>';
                    $(this).parent().append(linkHtml);
                }
            });
        });

        // Display working plan
        $('#providers .breaks tbody').empty();
        var workingPlan = $.parseJSON(provider.settings.working_plan);
        BackendUsers.wp.setup(workingPlan);
        $('.breaks').find('.edit-break, .delete-break').prop('disabled', true);
    };

    /**
     * Filters provider records depending a string key.
     *
     * @param {string} key This is used to filter the provider records of the database.
     * @param {numeric} selectId Optional, if set, when the function is complete a result row can be set as selected.
     * @param {bool} display Optional (false), if true the selected record will be also displayed.
     */
    ProvidersHelper.prototype.filter = function(key, selectId, display) {
        display = display || false;

        var postUrl = GlobalVariables.baseUrl + '/index.php/backend_api/ajax_filter_providers';
        var postData = {
            csrfToken: GlobalVariables.csrfToken,
            key: key
        };

        $.post(postUrl, postData, function(response) {
            if (!GeneralFunctions.handleAjaxExceptions(response)) {
                return;
            }

            this.filterResults = response;

            $('#filter-providers .results').data('jsp').destroy();
            $('#filter-providers .results').html('');
            $.each(response, function(index, provider) {
                var html = this.getFilterHtml(provider);
                $('#filter-providers .results').append(html);
            }.bind(this));
            $('#filter-providers .results').jScrollPane({ mouseWheelSpeed: 70 });

            if (response.length == 0) {
                $('#filter-providers .results').html('<em>' + EALang['no_records_found'] + '</em>')
            }

            if (selectId != undefined) {
                this.select(selectId, display);
            }
        }.bind(this), 'json').fail(GeneralFunctions.ajaxFailureHandler);
    };

    /**
     * Get an provider row html code that is going to be displayed on the filter results list.
     *
     * @param {Object} provider Contains the provider record data.
     *
     * @return {String} The html code that represents the record on the filter results list.
     */
    ProvidersHelper.prototype.getFilterHtml = function(provider) {
        var name = provider.first_name + ' ' + provider.last_name,
        info = provider.email;

        info = (provider.mobile_number != '' && provider.mobile_number != null)
                ? info + ', ' + provider.mobile_number : info;

        info = (provider.phone_number != '' && provider.phone_number != null)
                ? info + ', ' + provider.phone_number : info;

        var html =
                '<div class="provider-row entry" data-id="' + provider.id + '">' +
                    '<strong>' + name + '</strong><br>' +
                    info + '<br>' +
                '</div><hr>';

        return html;
    };

    /**
     * Initialize the editable functionality to the break day table cells.
     *
     * @param {Object} $selector The cells to be initialized.
     */
    ProvidersHelper.prototype.editableBreakDay = function($selector) {
        var weekDays = {};
        weekDays[EALang['monday']] = 'Monday';
        weekDays[EALang['tuesday']] = 'Tuesday';
        weekDays[EALang['wednesday']] = 'Wednesday';
        weekDays[EALang['thursday']] = 'Thursday';
        weekDays[EALang['friday']] = 'Friday';
        weekDays[EALang['saturday']] = 'Saturday';
        weekDays[EALang['sunday']] = 'Sunday';


        $selector.editable(function(value, settings) {
            return value;
        }, {
            type: 'select',
            data: weekDays,
            event: 'edit',
            height: '30px',
            submit: '<button type="button" class="hidden submit-editable">Submit</button>',
            cancel: '<button type="button" class="hidden cancel-editable">Cancel</button>',
            onblur: 'ignore',
            onreset: function(settings, td) {
                if (!BackendUsers.enableCancel) {
                    return false; // disable ESC button
                }
            },
            onsubmit: function(settings, td) {
                if (!BackendUsers.enableSubmit) {
                    return false; // disable Enter button
                }
            }
        });
    };

    /**
     * Initialize the editable functionality to the break time table cells.
     *
     * @param {jQuery} $selector The cells to be initialized.
     */
    ProvidersHelper.prototype.editableBreakTime = function($selector) {
        $selector.editable(function(value, settings) {
            // Do not return the value because the user needs to press the "Save" button.
            return value;
        }, {
            event: 'edit',
            height: '25px',
            submit: '<button type="button" class="hidden submit-editable">Submit</button>',
            cancel: '<button type="button" class="hidden cancel-editable">Cancel</button>',
            onblur: 'ignore',
            onreset: function(settings, td) {
                if (!BackendUsers.enableCancel) {
                    return false; // disable ESC button
                }
            },
            onsubmit: function(settings, td) {
                if (!BackendUsers.enableSubmit) {
                    return false; // disable Enter button
                }
            }
        });
    };

    /**
     * Select and display a providers filter result on the form.
     *
     * @param {Number} id Record id to be selected.
     * @param {Boolean} display Optional (false), if true the record will be displayed on the form.
     */
    ProvidersHelper.prototype.select = function(id, display) {
        display = display || false;

        // Select record in filter results.
        $('#filter-providers .provider-row').each(function() {
            if ($(this).attr('data-id') == id) {
                $(this).addClass('selected');
                return false;
            }
        });

        // Display record in form (if display = true).
        if (display) {
            $.each(this.filterResults, function(index, provider) {
                if (provider.id == id) {
                    this.display(provider);
                    $('#edit-provider, #delete-provider').prop('disabled', false);
                    return false;
                }
            }.bind(this));
        }
    };

    window.ProvidersHelper = ProvidersHelper;

})();