import libraryLoader from "./library_loader.js";
import noteDetailService from './note_detail.js';
import treeService from './tree.js';
import attributeService from "./attributes.js";

const $component = $('#note-detail-text');

let textEditor = null;

async function show() {
    if (!textEditor) {
        await libraryLoader.requireLibrary(libraryLoader.CKEDITOR);

        // CKEditor since version 12 needs the element to be visible before initialization. At the same time
        // we want to avoid flicker - i.e. show editor only once everything is ready. That's why we have separate
        // display of $component in both branches.
        $component.show();

        // textEditor might have been initialized during previous await so checking again
        // looks like double initialization can freeze CKEditor pretty badly
        if (!textEditor) {
            textEditor = await BalloonEditor.create($component[0], {
                placeholder: "Type the content of your note here ..."
            });

            onNoteChange(noteDetailService.noteChanged);
        }
    }

    textEditor.isReadOnly = await isReadOnly();

    $component.show();

    textEditor.setData(noteDetailService.getActiveNote().content);
}

function getContent() {
    let content = textEditor.getData();

    // if content is only tags/whitespace (typically <p>&nbsp;</p>), then just make it empty
    // this is important when setting new note to code
    if (jQuery(content).text().trim() === '' && !content.includes("<img")) {
        content = '';
    }

    return content;
}

async function isReadOnly() {
    const attributes = await attributeService.getAttributes();

    return attributes.some(attr => attr.type === 'label' && attr.name === 'readOnly');
}

function focus() {
    $component.focus();
}

function getEditor() {
    return textEditor;
}

function onNoteChange(func) {
    textEditor.model.document.on('change:data', func);
}

$component.on("dblclick", "img", e => {
    const $img = $(e.target);
    const src = $img.prop("src");

    const match = src.match(/\/api\/images\/([A-Za-z0-9]+)\//);

    if (match) {
        const noteId = match[1];

        treeService.activateNote(noteId);
    }
    else {
        window.open(src, '_blank');
    }
});

export default {
    show,
    getEditor,
    getContent,
    focus,
    onNoteChange,
    cleanup: () => {
        if (textEditor) {
            textEditor.setData('');
        }
    },
    scrollToTop: () => $component.scrollTop(0)
}