/**
 * Hide Prosemirror and show the default editor
 *
 * @param {string} text the wiki syntax to be shown in the textarea
 */
function showDefaultEditor(text) {
    window.Prosemirror.destroyProsemirror();
    window.proseMirrorIsActive = false;
    dw_locktimer.init(dw_locktimer.timeout/1000, dw_locktimer.draft);
    jQuery('#wiki__text').val(text).show();
    jQuery('#size__ctl').show();
    jQuery('.editBox > .toolbar').show();
}

/**
 * Hide the default editor and start a new Prosemirror Editor
 *
 * @param {string} json the prosemirror document json
 */
function showProsemirror(json) {
    const $textArea = jQuery('#wiki__text');
    const $prosemirrorJsonInput = jQuery('#dw__editform').find('[name=prosemirror_json]').val(json);
    try {
        window.Prosemirror.enableProsemirror();
        stickyMenubar();
        disableNativeFirefoxTableControls();
    } catch (e) {
        console.error(e);
        let message = 'There was an error in the WYSIWYG editor. You will be redirected to the syntax editor in 5 seconds.';
        if (window.SentryPlugin) {
            SentryPlugin.logSentryException(e, {
                tags: {
                    plugin: 'prosemirror',
                    'id': JSINFO.id,
                },
                extra: {
                    'content': $textArea.val(),
                    'json': $prosemirrorJsonInput.val(),
                }
            });
            message += ' -- The error has been logged to Sentry.';
        }
        showErrorMessage(message);
        setTimeout(function() {
            jQuery('.plugin_prosemirror_useWYSIWYG').click();
        }, 5000);
    }
    window.proseMirrorIsActive = true;
    $textArea.hide();
    jQuery('#size__ctl').hide();
    jQuery('.editBox > .toolbar').hide();
    jQuery('div.ProseMirror').focus();

    if (dw_locktimer.addField) {
        // todo remove this guard after the next stable DokuWiki release after Greebo
        dw_locktimer.init(dw_locktimer.timeout/1000, dw_locktimer.draft, 'prosemirror__editor');
        dw_locktimer.addField('input[name=prosemirror_json]');
    } else {
        console.warn('Draft saving in WYSIWYG is not available. Please upgrade your wiki to the current development snapshot.')
    }
}

/**
 * Disables Firefox's controls for editable tables, they are incompatible with prosemirror
 *
 * See https://github.com/ProseMirror/prosemirror/issues/432 and https://github.com/ProseMirror/prosemirror-tables/issues/22
 */
function disableNativeFirefoxTableControls() {
    document.execCommand("enableObjectResizing", false, "false");
    document.execCommand("enableInlineTableEditing", false, "false");
}

/**
 * Initialize the prosemirror framework
 *
 * (This shouldn't do much until we actually use the editor, but we maybe shouldn't do this twice)
 */
function initializeProsemirror() {
    try {
        /* DOKUWIKI:include lib/bundle.js */
    } catch (e) {
        const $textArea = jQuery('#wiki__text');
        console.error(e);
        let message = 'There was an error initializing the WYSIWYG editor.';
        if (window.SentryPlugin) {
            SentryPlugin.logSentryException(e, {
                tags: {
                    plugin: 'prosemirror',
                    'id': JSINFO.id,
                },
                extra: {
                    'content': $textArea.val(),
                }
            });
            message += ' The error has been logged to sentry.';
        }

        showErrorMessage(message);

        DokuCookie.setValue('plugin_prosemirror_useWYSIWYG', '');
    }
}

/**
 * Add the error message above the editor
 *
 * @param {string} errorMsg
 */
function showErrorMessage(errorMsg) {
    jQuery('.editBox').before(
        jQuery('<div class="error"></div>').text(errorMsg)
    );
}

/**
 * Switch between WYSIWYG and Syntax editor
 */
function toggleEditor() {
    const $textArea = jQuery('#wiki__text');
    const $jsonField = jQuery('#dw__editform').find('[name=prosemirror_json]');
    jQuery.post(DOKU_BASE + 'lib/exe/ajax.php', {
        call: 'plugin_prosemirror_switch_editors',
        data: window.proseMirrorIsActive ? $jsonField.val() : $textArea.val(),
        getJSON: window.proseMirrorIsActive ? '0' : '1',
    }).done(function handleSwitchEditorResponse(data) {
        if (window.proseMirrorIsActive) {
            showDefaultEditor(data.text);
        } else {
            showProsemirror(data.json);
        }
    }).fail(function (jqXHR, textStatus, errorThrown) {
        console.error(jqXHR, textStatus, errorThrown); // FIXME: proper error handling
        if (jqXHR.responseJSON && jqXHR.responseJSON.error) {
            showErrorMessage(jqXHR.responseJSON.error);
        } else {
            let message = 'The request failed with an unexpected error.';
            if (window.SentryPlugin) {
                SentryPlugin.logSentryException(new Error(textStatus), {
                    tags: {
                        plugin: 'prosemirror',
                        'id': JSINFO.id,
                        status: jqXHR.status
                    },
                    extra: {
                        'content': $textArea.val(),
                        'responseText': jqXHR.responseText,
                    }
                });
                message += ' -- The error has been logged to Sentry.';
            }
            showErrorMessage(message);
        }
    });

    const $current = DokuCookie.getValue('plugin_prosemirror_useWYSIWYG');
    DokuCookie.setValue('plugin_prosemirror_useWYSIWYG', $current ? '' : '1');
}

/**
 * If the cookie is set, then show the WYSIWYG editor and add the switch-editor-event to the button
 */
function handleEditSession() {
    const $jsonField = jQuery('#dw__editform').find('[name=prosemirror_json]');
    if (DokuCookie.getValue('plugin_prosemirror_useWYSIWYG')) {
        showProsemirror($jsonField.val());
    }
    const $toggleEditorButton = jQuery('.plugin_prosemirror_useWYSIWYG');
    $toggleEditorButton.on('click', toggleEditor);
}

/**
 * when the editor switch button moves out of the view-port, the menubar gets a class
 * @see https://codepen.io/hey-nick/pen/mLpmMV
 * @see https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API
 */

function stickyMenubar() {
    const editorswitch = document.querySelector('button[name=prosemirror]');
    const menubar = document.querySelector('#prosemirror__editor div.menubar');

    const observer = new IntersectionObserver(
        ([e]) => {
            return menubar.classList.toggle('prosemirror-menubar-fixed', e.intersectionRatio !== 1);
        },
        {
            root: null,
            threshold: [0, 1]
        }
    );
    if (editorswitch && menubar) {
        observer.observe(editorswitch);
    }
}


jQuery(function () {
    initializeProsemirror();
    window.proseMirrorIsActive = false;

    if (jQuery('#dw__editform').find('[name=prosemirror_json]').length) {
        handleEditSession();
    }

    jQuery(window).on('fastwiki:afterSwitch', function(evt, viewMode, isSectionEdit, prevViewMode) {
        if (viewMode === 'edit' || isSectionEdit) {
            handleEditSession();
        }
    });
});