// declare a reverse function for jquery
jQuery.fn.reverse = [].reverse;

// show the confirmation modal and run the supplied command if confirm is pressed
function askConfirmation(message, command) {
    var $confirmationModal = $('#confirmation-modal'),
        $heading = $confirmationModal.find('.panel-heading'),
        $cancelButton = $confirmationModal.find('.btn.cancel-button'),
        $confirmButton = $confirmationModal.find('.btn.confirm-button'),
        fadeTime = 250;

    // close the confirmation modal and unbind its events
    var closeConfirmationModal = function() {
        // unbind events
        $(document).off('keyup', escapeModal);
        $cancelButton.off('click', closeConfirmationModal);
        $confirmButton.off('click', confirmModal);

        // clear the heading
        $heading.empty();

        // hide the modal
        $confirmationModal.css({ opacity: 0 });
        setTimeout(function() { $confirmationModal.css({ visibility: 'hidden' }); }, fadeTime);
    };

    // close the modal if the escape button is pressed
    var escapeModal = function(e) {
        if (e.keyCode == 27)
            closeConfirmationModal();
    };

    // functionality to run when clicking the confirm button
    var confirmModal = function() {
        command();
        closeConfirmationModal();
    };

    // hide the modal when the cancel button is pressed
    $cancelButton.on('click', closeConfirmationModal);

    // hide the modal when the escape key is pressed
    $(document).on('keyup', escapeModal);

    // run the command and hide the modal when the confirm button is pressed
    $confirmButton.on('click', confirmModal);

    // set the heading with the supplied message
    $heading.text(message);

    // show the confirmation modal
    $confirmationModal.css({
        visibility: 'visible',
        opacity: 1
    });
}

// show the alert modal and display the provided message until accept is pressed
function showAlert(message, command) {
    var $alertModal = $('#alert-modal'),
        $message = $alertModal.find('.message'),
        $acceptButton = $alertModal.find('.btn.accept-button'),
        fadeTime = 250;

    // close the alert modal and unbind its events
    var closeAlertModal = function() {
        // unbind events
        $(document).off('keyup', escapeModal);
        $acceptButton.off('click', closeAlertModal);

        // clear the message
        $message.empty();

        // hide the modal
        $alertModal.css({ opacity: 0 });
        setTimeout(function() { $alertModal.css({ visibility: 'hidden' }); }, fadeTime);

        // if a command was passed run it now
        if (command !== undefined)
            command();
    };

    // close the modal if the escape button is pressed
    var escapeModal = function(e) {
         if (e.keyCode == 27)
             closeAlertModal();
    };

    // hide the modal when the escape key is pressed
    $(document).on('keyup', escapeModal);

    // hide the modal when the accept button is pressed
    $acceptButton.on('click', closeAlertModal);

    // set the message with the supplied message
    $message.text(message);

    // show the alert modal
    $alertModal.css({
        visibility: 'visible',
        opacity: 1
    });
}

// initialize edit list functionality
function editListInit() {
    var editList = document.getElementById('edit-list'),
        $editList = $(editList),
        model = $editList.data('model');

    // initialize new button functionality
    var newButtonInit = function() {
        var $newButton = $('.btn.new-button');

        $newButton.on('click', function() {
            window.location.href = '/dashboard/' + model + '-edit/new';
        });
    };

    // initialize edit button functionality
    var editButtonInit = function() {
        var $editButtons = $('.btn.edit-button');

        $editButtons.on('click', function() {
            var $this = $(this),
                $listItem = $this.closest('.list-group-item'),
                itemId = $listItem.data('id');

            // go to the edit page
            window.location.href = '/dashboard/' + model + '-edit/' + itemId;
        });
    };

    // initialize delete button functionality
    var deleteButtonInit = function() {
        var $deleteButtons = $('.btn.delete-button');

        $deleteButtons.on('click', function() {
            var $this = $(this),
                $listItem = $this.closest('.list-group-item'),
                itemId = $listItem.data('id');

            askConfirmation('Are you sure you want to delete this?', function() {
                $.ajax({
                    type: 'DELETE',
                    url:  '/dashboard/delete',
                    data: {
                        model:   model,
                        id:      itemId,
                        _token:  $('#token').val()
                    }
                }).always(function(response) {
                    if (response === 'success') {
                        $listItem.slideUp(150, function() { $listItem.remove(); });
                    } else {
                        showAlert('ERROR: Failed to delete record');
                    }
                });
            });
        });
    };

    // initialize sort functionality if data-sort is set
    var sortRowInit = function() {
        if ($editList.attr('data-sort')) {
            var sortCol = $editList.data('sort'),
                sortOrder = {};

            var sortable = Sortable.create(editList, {
                handle: '.sort-icon',
                onUpdate: function() {
                    // update the sortOrder object based on the updated order
                    $editList.find('.list-group-item').reverse().each(function(index) {
                        var thisId = $(this).data('id');
                        sortOrder[thisId] = index;
                    });

                    $.ajax({
                        type: 'POST',
                        url:  '/dashboard/reorder',
                        data: {
                            model:  model,
                            order:  sortOrder,
                            column: sortCol,
                            _token: $('#token').val()
                        }
                    }).always(function(response) {
                        if (response !== 'success') {
                            showAlert('ERROR: Sorting failed', function() {
                                document.location.reload(true);
                            });
                        }
                    });
                }
            });
        }
    };

    newButtonInit();
    editButtonInit();
    deleteButtonInit();
    sortRowInit();
}

function editItemInit() {
    var $editItem = $('#edit-item'),
        $submit = $('#submit'),
        $backButton = $('#back'),
        $textInputs = $('.text-input'),
        $dateTimePickers = $('.date-time-picker'),
        $mkdEditors = $('.mkd-editor'),
        $imgUpload = $('#image-upload'),
        $token = $('#_token'),
        $spinner = $('#loading-modal'),
        fadeTime = 250,
        model = $editItem.data('model'),
        id = $editItem.data('id'),
        allowTimes = [],
        simplemde = [],
        formData = {},
        submitting = false;

    // show the loading modal
    var showLoadingModal = function() {
        $spinner.css({
            visibility: 'visible',
            opacity: 1
        });
    };

    // hide the loading modal
    var hideLoadingModal = function() {
        $spinner.css({ opacity: 0 });
        setTimeout(function() { $spinner.css({ visibility: 'hidden' }); }, fadeTime);
    };

    // fill the formData object with data from all the form fields
    var getFormData = function() {
        // function to add a column and value to the formData object
        var addFormData = function(column, value) {
            // add the value to a key with the column name
            formData[column] = value;

            // add the column to the array of columns
            formData.columns.push(column);
        };

        // reset the formData object
        formData = {};

        // add the database model row id and _token
        formData.model = model;
        formData.id = id;
        formData._token = $token.val();

        // create an empty array to contain the list of columns
        formData.columns = [];

        // add values from the contents of text-input class elements
        $textInputs.each(function() {
            var $this = $(this),
                column = $this.attr('id'),
                value = $this.val();

            addFormData(column, value);
        });

        // add values from the contents of date-time-picker class elements
        $dateTimePickers.each(function() {
            var $this = $(this),
                column = $this.attr('id'),
                value = $this.val() + ':00';

            addFormData(column, value);
        });

        // add values from the contents of the markdown editor for mkd-editor class elements
        $mkdEditors.each(function() {
            var $this = $(this),
                column = $this.attr('id'),
                value = simplemde[column].value();

            addFormData(column, value);
        });
    };

    var uploadImage = function(row_id) {
        // functionality to run on success
        var returnSuccess = function() {
            hideLoadingModal();
            window.location.href = '/dashboard/' + model;
        };

        // add the image from the image upload box for image-upload class elements
        if ($imgUpload.length && $imgUpload.val() !== '') {
            var file = new FormData();

            // add the file, id and model to the formData variable
            file.append('file', $imgUpload[0].files[0]);
            file.append('id', row_id);
            file.append('model', model);

            $.ajax({
                type:        'POST',
                url:         '/dashboard/image-upload',
                data:        file,
                processData: false,
                contentType: false,
                beforeSend:  function(xhr) { xhr.setRequestHeader('X-CSRF-TOKEN', $token.val()); }
            }).always(function(response) {
                if (response === 'success') {
                    returnSuccess();
                } else {
                    hideLoadingModal();
                    showAlert('ERROR: Failed to upload image');
                    submitting = false;
                }
            });
        } else {
            returnSuccess();
        }
    };

    // allow start time selection to start on the hour and every 15 minutes after
    for (var hours=0; hours<=23; hours++) {
        for (var minutes=0; minutes<=3; minutes++) {
            allowTimes.push(hours + ':' + (minutes === 0 ? '00' : minutes * 15));
        }
    }

    // enable the datetimepicker for each element with the date-time-picker class
    $dateTimePickers.each(function() {
        $(this).datetimepicker({
            format: 'Y-m-d H:i',
            allowTimes: allowTimes,
            step: 15
        });
    });

    // enable the markdown editor for each element with the mkd-editor class
    $mkdEditors.each(function() {
        var $this = $(this),
            column = $this.attr('id');

        simplemde[column] = new SimpleMDE({
            element: this,
            toolbar: [
                'bold',
                'italic',
                '|',
                'heading-1',
                'heading-2',
                'heading-3',
                '|',
                'quote',
                'unordered-list',
                'ordered-list',
                'link'
            ],
            blockStyles: { italic: '_' },
            autoDownloadFontAwesome: false,
            tabSize: 4
        });

        setTimeout(function() {
            simplemde[column].value($this.attr('value'));
        }, 100);
    });

    // initialize back button
    $backButton.on('click', function() {
        if (!submitting) {
            askConfirmation('Cancel and return to the ' + model + ' list?', function() {
                window.location.href = '/dashboard/' + model;
            });
        }
    });

    // initialize submit button
    $submit.on('click', function() {
        if (!submitting) {
            submitting = true;

            // show the loading modal
            showLoadingModal();

            // populate the formData object
            getFormData();

            // submit the update
            $.ajax({
                type: 'POST',
                url:  '/dashboard/edit',
                data: formData
            }).always(function(response) {
                if (/^id:[0-9][0-9]*$/.test(response)) {
                    uploadImage(response.replace(/^id:/, ''));
                } else {
                    hideLoadingModal();
                    showAlert('ERROR: Failed to update record');
                    submitting = false;
                }
            });
        }
    });
}

// run once the document is ready
$(document).ready(function() {
    if ($('#edit-list').length) {
        editListInit();
    } else if ($('#edit-item').length) {
        editItemInit();
    }
});