import React, { useRef, useEffect, useState, useCallback } from "react";
import { Editor } from "@tinymce/tinymce-react";

function CustomEditor(props) {
  const editorRef = useRef(null);
  const [isEditorReady, setIsEditorReady] = useState(false);
  const [currentContent, setCurrentContent] = useState(props.initialData || "");
  const isUserTypingRef = useRef(false);

  // Handle editor initialization
  const handleInit = useCallback((evt, editor) => {
    editorRef.current = editor;
    setIsEditorReady(true);
    
    // Set initial content immediately when editor is ready
    if (props.initialData) {
      editor.setContent(props.initialData);
      setCurrentContent(props.initialData);
    }
    
    // Simple onChange handler
    editor.on('change', () => {
      isUserTypingRef.current = true; // Mark that user is typing
      const content = editor.getContent();
      setCurrentContent(content);
      if (props.onChange) {
        props.onChange(content);
      }
      // Reset typing flag after a short delay
      setTimeout(() => {
        isUserTypingRef.current = false;
      }, 100);
    });
  }, [props.initialData, props.onChange]);

  // Watch for changes in initialData prop (from external sources like setValue)
  useEffect(() => {
    if (props.initialData !== currentContent && !isUserTypingRef.current) {
      setCurrentContent(props.initialData || "");
      
      // Update editor content if editor is ready
      if (editorRef.current && isEditorReady) {
        editorRef.current.setContent(props.initialData || "");
      }
    }
  }, [props.initialData, isEditorReady]); // Removed currentContent from dependency

  // Handle initial data when editor becomes ready (only for initialization)
  useEffect(() => {
    if (isEditorReady && props.initialData && editorRef.current && !isUserTypingRef.current) {
      editorRef.current.setContent(props.initialData);
      setCurrentContent(props.initialData);
    }
  }, [isEditorReady]); // Only depend on isEditorReady, not currentContent

  return (
    <Editor
      onInit={handleInit}
      apiKey={process.env.NEXT_PUBLIC_TINYMCE_API_KEY}
      init={{
        height: 400,
        menubar: false,
        plugins: [
          'advlist', 'autolink', 'lists', 'link', 'image', 'charmap', 'preview',
          'anchor', 'searchreplace', 'visualblocks', 'code', 'fullscreen',
          'insertdatetime', 'media', 'table', 'code', 'help', 'wordcount'
        ],
        toolbar: 'undo redo | blocks | ' +
          'bold italic forecolor | alignleft aligncenter ' +
          'alignright alignjustify | bullist numlist outdent indent | ' +
          'removeformat | table | code | help',
        content_style: `
          body { 
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 
            font-size: 14px; 
            line-height: 1.6; 
            color: #333; 
          }
          .mce-content-body { 
            padding: 16px; 
            min-height: 368px; 
          }
        `,
        placeholder: 'Start typing...',
        branding: false,
        elementpath: false,
        resize: false,
        statusbar: false,
        auto_focus: false,
        forced_root_block: 'p',
        entity_encoding: 'raw',
        verify_html: false,
        cleanup: false,
        cleanup_on_startup: false,
        auto_resize: false,
        paste_as_text: false,
        paste_enable_default_filters: true,
        paste_word_valid_elements: 'b,strong,i,em,h1,h2,h3,h4,h5,h6',
        paste_retain_style_properties: 'color background-color font-size font-weight',
        mobile: {
          theme: 'silver',
          plugins: ['lists', 'autolink', 'link', 'image', 'table'],
          toolbar: 'bold italic | bullist numlist | link image'
        }
      }}
    />
  );
}

export default CustomEditor;