/*
 * Supercode TinyMCE Plugin
 * Supercode is an enhanced source code editor plugin for TinyMCE, the popular web-based WYSIWYG editor. This plugin provides users with a seamless experience for editing and displaying source code within the TinyMCE editor environment.
 *
 * Repository: https://github.com/prathamVaidya/supercode-tinymce-plugin
 * Author: Pratham Vaidya
 * License: GPL-3.0
 * Version: 1.2.1
 *
 * Released under the GPL-3.0 License.
 */

!(function () {
  'use strict';

  /**
        modal ->
     {
        element : Modal Container Ref
        editor : Ace Editor
     }
     */

  const MODAL_HTML = `
    <div id="supercode-backdrop"></div>
    <div id="supercode-modal">
        <div id="supercode-header">
            <h1>Source Code Editor</h1>
            <button id="supercode-close-btn">
                Close
            </button>
        </div>
        <div id="supercode-editor"></div>
        <div id="supercode-footer">
            <button id="supercode-cancel-btn">
                Cancel
            </button>
            <button id="supercode-save-btn">
                Save
            </button>
        </div>
    </div>
`;

  const MODAL_CSS = `

    :root{
        --supercode-modal-primary: #ffffff;
        --supercode-modal-secondary: #222f3e;
        --supercode-modal-border: rgba(0, 0, 0, 0.1);
    }

    /* Media query for mobile devices */
    @media only screen and (max-width: 767px) {
        #supercode-modal {
            width: 100% !important;
            height: 100% !important;
            border-radius: 0 !important;
        }
    }
    .disable-scroll {
        overflow: hidden;
    }
    #supercode-modal-container {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 990;
        display: none;
        opacity: 0;
        transition: opacity 0.1s linear;
    }
    #supercode-backdrop {
        position: absolute;
        top: 0;
        left: 0;
        background: black;
        opacity: 0.7;
        width: 100%;
        height: 100%;
        z-index: 1;
    }
    #supercode-modal {
        width: 90%;
        height: 80%;
        max-width: 1200px;
        z-index: 2;
        overflow: hidden;
        border-radius: 10px;
        display: flex;
        flex-direction: column;
        background: var(--supercode-modal-primary);
    }
    #supercode-header {
        display: flex;
        padding: 0.5rem 1rem;
        border-bottom: 1px solid var(--supercode-modal-border);
        color: var(--supercode-modal-secondary);
    }
    #supercode-modal h1 {
        flex-grow: 1;
        margin: auto;
        font-size: 14px;
    }
    #supercode-close-btn {
        background: none;
        border: none;
        padding: 0;
        height: 100%;
        cursor: pointer;
        fill: var(--supercode-modal-secondary);
    }
    #supercode-editor {
        width: 100%;
        height: 100%;
        position: relative;
    }
    #supercode-footer {
        padding: 0.5rem 1rem;
        display: flex;
        justify-content: end;
        gap: 1rem;
        border-top: 1px solid var(--supercode-modal-border);
    }
    #supercode-footer button {
        padding: 0.5rem 1rem;
        border-radius: 5px;
        font-weight: bold;
        border: none;
        cursor: pointer;
        min-width: 5rem;
        transition: opacity 0.1s linear;
    }
    #supercode-footer button:hover {
        opacity: 0.8;
    }
    #supercode-cancel-btn {
        background: transparent;
        color: var(--supercode-modal-secondary);
    }
    #supercode-save-btn {
        background: var(--supercode-modal-secondary);
        color: var(--supercode-modal-primary);
    }
    `;

  const CLOSE_ICON_FALLBACK = `<svg width="24" height="24"><path d="M17.3 8.2 13.4 12l3.9 3.8a1 1 0 0 1-1.5 1.5L12 13.4l-3.8 3.9a1 1 0 0 1-1.5-1.5l3.9-3.8-3.9-3.8a1 1 0 0 1 1.5-1.5l3.8 3.9 3.8-3.9a1 1 0 0 1 1.5 1.5Z" fill-rule="evenodd"></path></svg>`;
  const CODE_ICON_FALLBACK = `<svg width="24" height="24" focusable="false"><g fill-rule="nonzero"><path d="M9.8 15.7c.3.3.3.8 0 1-.3.4-.9.4-1.2 0l-4.4-4.1a.8.8 0 0 1 0-1.2l4.4-4.2c.3-.3.9-.3 1.2 0 .3.3.3.8 0 1.1L6 12l3.8 3.7ZM14.2 15.7c-.3.3-.3.8 0 1 .4.4.9.4 1.2 0l4.4-4.1c.3-.3.3-.9 0-1.2l-4.4-4.2a.8.8 0 0 0-1.2 0c-.3.3-.3.8 0 1.1L18 12l-3.8 3.7Z"></path></g></svg>`;

  let modal = null;

  const initDependencies = (config) => {
    const scripts = {
      'ace-default': {
        url: 'https://cdnjs.cloudflare.com/ajax/libs/ace/1.9.6/ace.js',
        loaded: false,
        required: true,
      },
      'beautify-html': {
        url: 'https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.15.1/beautify-html.min.js',
        loaded: false,
        required: true,
      },
      'ace-autocomplete': {
        url: 'https://cdnjs.cloudflare.com/ajax/libs/ace/1.9.6/ext-language_tools.min.js',
        loaded: false,
        required: false,
      },
    };

    if (config.autocomplete) {
      scripts['ace-autocomplete'].required = true;
    }

    Object.values(scripts).forEach((script) => {
      if (script.loaded) return;
      let element = document.createElement('script');
      element.src = script.url;
      element.type = 'text/javascript';
      document.body.appendChild(element);
    });
  };

  const injectCSS = (css) => {
    const style = document.createElement('style');
    style.innerHTML = css;
    document.head.append(style);
  };

  const debounce = (func, delay) => {
    let timeoutId;
    return (...args) => {
      clearTimeout(timeoutId);
      timeoutId = setTimeout(() => func.apply(null, args), delay);
    };
  };

  // on plugin load
  const mainPlugin = function (editor) {
    let editorWidth = 0,
      originalHeader,
      isScreenSizeChanged = false,
      session,
      aceEditor;
    const Config = {
      theme: 'chrome',
      fontSize: 14, // in px
      wrap: true,
      icon: undefined, // auto set during config
      iconName: 'sourcecode',
      autocomplete: false,
      language: 'html',
      renderer: null,
      parser: null,
      shortcut: true,
      aceCss: null,
      fontFamily: null,
      fallbackModal: false, // enabled in cases like inline, or versions where `CustomView` is not supported.
      modalPrimaryColor: '#ffffff',
      modalSecondaryColor: '#222f3e',
      dark: false,
      debug: true,
    };

    const debug = (msg) => {
      if (Config.debug) {
        console.warn(`${msg} \n\nUse debug:false option to disable this warning`);
      }
    };

    // Get Configurations
    const setConfig = (editor) => {
      const supercodeOptions = editor.getParam('supercode');

      if (supercodeOptions && typeof supercodeOptions === 'object') {
        for (const key in supercodeOptions) {
          if (supercodeOptions.hasOwnProperty(key)) {
            const value = supercodeOptions[key];

            switch (key) {
              case 'theme':
              case 'language':
              case 'iconName':
              case 'aceCss':
              case 'fontFamily':
              case 'modalPrimaryColor':
              case 'modalSecondaryColor':
                if (typeof value === 'string') {
                  Config[key] = value;
                }
                break;
              case 'fontSize':
                if (typeof value === 'number' && value > 0) {
                  Config.fontSize = parseInt(value);
                }
                break;
              case 'wrap':
              case 'autocomplete':
              case 'shortcut':
              case 'fallbackModal':
              case 'dark':
              case 'debug':
                if (typeof value === 'boolean') {
                  Config[key] = value;
                }
                break;
              case 'parser':
              case 'renderer':
                if (typeof value === 'function') {
                  Config[key] = value;
                }
                break;
              default:
                // Ignore unrecognized options
                break;
            }
          }
        }
      }

      // Set plugin icon
      Config.icon = editor.ui.registry.getAll?.().icons?.[Config.iconName];
      if (!Config.icon) {
        Config.icon = CODE_ICON_FALLBACK;
        debug(
          'Supercode Icon name is invalid or you are using older versions of tinyMCE. The icon is set to default fallback code icon.'
        );
      }

      // Detect and set fallback model if its required
      if (!Config.fallbackModal) {
        // case: inline mode, < v5
        if (editor.getParam('inline') === true || tinymce.majorVersion <= 5) {
          Config.fallbackModal = true;
        }
      }
    };

    const setAceOptions = () => {
      const options = {};

      if (Config.autocomplete) {
        options.enableLiveAutocompletion = true;
      }

      if (Config.fontFamily) {
        options.fontFamily = Config.fontFamily;
      }

      aceEditor.setOptions(options);
      aceEditor.setTheme(`ace/theme/${Config.theme}`);
      aceEditor.setFontSize(Config.fontSize);
      aceEditor.setShowPrintMargin(false);
    };

    // Builds ace editor only on the first run
    const buildAceEditor = (view) => {
      // Attach Ace Editor to shadow dom to prevent tinymce css affecting it
      view.attachShadow({ mode: 'open' });

      if (Config.aceCss) {
        const sheet = new CSSStyleSheet();
        sheet.replaceSync(Config.aceCss);
        view.shadowRoot.adoptedStyleSheets.push(sheet);
      }

      view.shadowRoot.innerHTML = `<div class="supercode-editor" style="width: 100%; height: 100%; position: absolute; left:0; top:0"></div>`;
      const editorElement = view.shadowRoot.querySelector('.supercode-editor');

      editorElement.style.width = '100%';
      editorElement.style.height = '100%';
      aceEditor = ace.edit(editorElement);
      // https://github.com/josdejong/jsoneditor/issues/742#issuecomment-698449020
      aceEditor.renderer.attachToShadowRoot();
      setAceOptions();
    };

    const setHeader = (view, originalHeader) => {
      // add a copy of original header to give original header look
      const newHeader = originalHeader.cloneNode(true);
      newHeader.style.position = 'relative';
      // If menu-bar exists utilize the space to show Title "Source Code Editor"
      const menubar = newHeader.querySelector('.tox-menubar');
      if (menubar) {
        menubar.innerHTML = `<b style='font-size: 14px; font-weight: bold; padding: 11px 9px;'>Source Code Editor</b>`;
      }

      // disable all the buttons except supercode button, attach event listener
      let overflowButton = null,
        isPluginButton = false;
      newHeader.querySelectorAll('.tox-tbtn, .tox-split-button').forEach((btn) => {
        if (btn.getAttribute('data-mce-name') != 'supercode') {
          // remove overflow button to make space for code button
          if (btn.getAttribute('data-mce-name') === 'overflow-button') {
            overflowButton = btn;
          }
          btn.classList.remove('tox-tbtn--enabled');
          btn.classList.add('tox-tbtn--disabled');
          btn.removeAttribute('data-mce-name');
        } else {
          isPluginButton = true;
          btn.setAttribute('data-mce-name', 'supercode-toggle');
          btn.classList.add('tox-tbtn--enabled');
          btn.onclick = onSaveHandler;
        }
      });

      // in case of overflow, replace the overflow button with code button
      if (!isPluginButton && overflowButton) {
        overflowButton.classList = 'tox-tbtn tox-tbtn--enabled';
        overflowButton.innerHTML = `<span class="tox-icon tox-tbtn__icon-wrap">${Config.icon}</span>`;
        overflowButton.onclick = onSaveHandler;
      }
      view.innerHTML = ''; // delete any existing header
      view.append(newHeader);
    };

    const setMainView = (view, width) => {
      // configure body of view to look similar to tinymce body, adds ace editor

      view.style.width = width + 'px';
      view.style.height = '100%';
      view.style.position = 'relative';

      buildAceEditor(view);
    };

    setConfig(editor);
    initDependencies(Config);

    const modalKeydownListener = (e) => {
      if (e.key === 'Escape') {
        hideModal();
      }
    };

    const showModal = () => {
      if (!modal) {
        // Build Modal
        const modalContainer = document.createElement('div');
        modalContainer.id = 'supercode-modal-container';
        modalContainer.innerHTML = MODAL_HTML;

        injectCSS(MODAL_CSS);

        document.body.append(modalContainer);
        modal = {
          element: modalContainer,
          editor: ace.edit(modalContainer.querySelector('#supercode-editor')),
        };
      }

      // transfer global editor in active scope (All methods work on local scope and need aceEditor)
      aceEditor = modal.editor;
      setAceOptions(); // update ace options according to current editor configs

      /* Update Event Listeners */
      modal.element.querySelector('#supercode-backdrop').onclick = hideModal;
      modal.element.querySelector('#supercode-close-btn').onclick = hideModal;
      modal.element.querySelector('#supercode-cancel-btn').onclick = hideModal;
      modal.element.querySelector('#supercode-save-btn').onclick = () => {
        onSaveHandler();
        hideModal();
      };

      if (Config.shortcut) {
        modal.element
          .querySelector('#supercode-editor')
          .addEventListener('keydown', modalKeydownListener);
      }

      /* Update Modal based on editor's theme */
      document.querySelector('body').classList.add('disable-scroll');

      document.body.style.setProperty('--supercode-modal-primary', Config.modalPrimaryColor);
      document.body.style.setProperty('--supercode-modal-secondary', Config.modalSecondaryColor);
      if (Config.dark) {
        document.body.style.setProperty('--supercode-modal-border', 'rgba(255, 255, 255, 0.1)');
      }

      modal.element.querySelector('#supercode-close-btn').innerHTML =
        editor.ui.registry.getAll?.().icons?.['close'] ?? CLOSE_ICON_FALLBACK;

      modal.element.style.display = 'flex';
      setTimeout(() => {
        modal.element.style.opacity = 1;
      }, 10);

      /* Load current editor's ace session into aceEditor */
      loadAceSession();
    };

    const hideModal = () => {
      if (Config.shortcut) {
        removeEventListener('keydown', modalKeydownListener);
      }
      document.querySelector('body').classList.remove('disable-scroll');
      modal.element.style.opacity = 0;
      editor.focus();
      setTimeout(() => {
        modal.element.style.display = 'none';
      }, 10);
    };

    // Save editor content to tinymce editor on ace editor change
    const liveSave = () => {
      editor.undoManager.transact(function () {
        let value = aceEditor.getValue();
        if (Config.renderer) {
          value = Config.renderer(value);
        }
        editor.setContent(value);
      });
      editor.nodeChanged();
    };

    const onSaveHandler = () => {
      editor.focus();
      if (Config.fallbackModal) {
        editor.undoManager.transact(function () {
          let value = aceEditor.getValue();
          if (Config.renderer) {
            value = Config.renderer(value);
          }
          editor.setContent(value);
        });
        editor.selection.setCursorLocation();
        editor.nodeChanged();
      }
      editor.execCommand('ToggleView', false, 'supercode');
    };

    const onKeyDownHandler = (e) => {
      if ((e.key === ' ' && e.ctrlKey) || e.key === 'Escape') {
        onSaveHandler();
      }
    };

    const getSourceCode = (value) => {
      if (Config.parser) {
        return Config.parser(value);
      }
      return html_beautify(value);
    };

    const loadAceSession = () => {
      // Load or build new ace session from editor
      let content = getSourceCode(editor.getContent());
      if (!session) {
        session = ace.createEditSession(content, `ace/mode/${Config.language}`);
        session.setUseWrapMode(Config.wrap);
        // Attach live save to ace editor for in-editor source view
        if (!Config.fallbackModal) {
          const debouncedSave = debounce(liveSave, 300);
          session.on('change', debouncedSave);
        }
      }
      aceEditor.setSession(session);
      session.setValue(content);
      aceEditor.gotoLine(Infinity);
      aceEditor.focus();
    };

    const startPlugin = function () {
      if (Config.fallbackModal) {
        showModal();
      } else {
        const container = editor.getContainer();

        if (editorWidth) {
          isScreenSizeChanged = editorWidth != container.clientWidth;
        }

        editorWidth = container.clientWidth;

        if (isScreenSizeChanged || !originalHeader) {
          originalHeader = container.querySelector('.tox-editor-header');
        }

        editor.execCommand('ToggleView', false, 'supercode');
      }
    };

    if (!Config.fallbackModal) {
      const CodeView = {
        onShow: (api) => {
          const codeView = api.getContainer();

          // On tinymce size change => resize code view
          if (isScreenSizeChanged) {
            setHeader(codeView.querySelector('.supercode-header'), originalHeader);
            codeView.querySelector('.supercode-body ').style.width = editorWidth + 'px';
            aceEditor.resize();
          }

          // Only on First time plugin opened => mount view
          if (codeView.childElementCount === 0) {
            codeView.style.padding = 0;
            codeView.style.display = 'flex';
            codeView.style.flexDirection = 'column';
            codeView.innerHTML = `<div class="supercode-header"></div><div class="supercode-body"></div>`;

            // Ctrl + Space Toggle Shortcut, Escape to Exit Source Code Mode
            if (Config.shortcut) {
              codeView.addEventListener('keydown', onKeyDownHandler);
            }
            // configure header
            setHeader(codeView.querySelector('.supercode-header'), originalHeader);
            // configure main code view to look same
            setMainView(codeView.querySelector('.supercode-body '), editorWidth);
          }

          loadAceSession();
        },
        onHide: () => {
          if (Config.shortcut) {
            removeEventListener('keydown', onKeyDownHandler);
          }
        },
      };

      editor.ui.registry.addView('supercode', CodeView);
    }

    editor.ui.registry.addButton('supercode', {
      icon: Config.iconName,
      tooltip: 'Source Code Editor (Ctrl + space)',
      onAction: startPlugin,
    });

    editor.ui.registry.addMenuItem('supercode', {
      icon: Config.iconName,
      text: 'Source Code',
      onAction: startPlugin,
    });

    editor.ui.registry.addContextMenu('supercode', {
      update: (element) => {
        return 'supercode';
      },
    });

    // Ctrl + Space Toggle Shortcut
    if (Config.shortcut) {
      editor.shortcuts.add('ctrl+32', 'Toggles Source Code Editing Mode', startPlugin);
    }

    return {
      getMetadata: function () {
        return {
          name: 'Supercode',
          url: 'https://github.com/prathamVaidya/supercode-tinymce-plugin',
        };
      },
    };
  };

  // On Script Load, the plugin will be loaded
  tinymce.PluginManager.add('supercode', mainPlugin);
})();