import React, { CSSProperties, useCallback, useRef, useEffect } from 'react';
import { useNode, UserComponent } from '@craftjs/core';
import { cssPropsToString } from '../../utils/style-helpers';

interface FooterProps {
  text?: string;
  style?: CSSProperties;
}

export const Footer: UserComponent<FooterProps> = ({
  text = '© 2026 MySite. All rights reserved.',
  style = {},
}) => {
  const {
    connectors: { connect, drag },
    selected,
    actions: { setProp },
  } = useNode((node) => ({
    selected: node.events.selected,
  }));

  const elRef = useRef<HTMLElement | null>(null);
  const editedTextRef = useRef<string | null>(null);

  const commitText = useCallback(() => {
    if (elRef.current) {
      const newText = elRef.current.innerText;
      editedTextRef.current = newText;
      setProp((p: FooterProps) => { p.text = newText; }, 500);
    }
  }, [setProp]);

  // Commit on blur
  const handleBlur = useCallback(() => { commitText(); }, [commitText]);

  // Also commit on deselect via effect -- covers the case where selection
  // clears without a real blur (e.g. clicking a different element that
  // steals selection programmatically), which used to lose the in-progress
  // edit. Mirrors Heading.tsx's mechanism.
  useEffect(() => {
    if (!selected && editedTextRef.current !== null) {
      setProp((p: FooterProps) => { p.text = editedTextRef.current!; }, 500);
      editedTextRef.current = null;
    }
  }, [selected, setProp]);

  // Set DOM text on mount and when text prop changes externally (not during editing)
  useEffect(() => {
    if (elRef.current && !selected && editedTextRef.current === null) {
      elRef.current.innerText = text || '';
    }
  }, [text, selected]);

  return (
    <footer
      ref={(ref: HTMLElement | null): void => {
        elRef.current = ref;
        if (ref) connect(drag(ref));
      }}
      contentEditable={selected}
      suppressContentEditableWarning
      onBlur={handleBlur}
      onInput={() => {
        // Track that we have unsaved edits
        if (elRef.current) {
          editedTextRef.current = elRef.current.innerText;
        }
      }}
      style={{
        padding: '24px 20px',
        textAlign: 'center',
        outline: 'none',
        cursor: selected ? 'text' : 'pointer',
        ...style,
      }}
    >
      {selected ? undefined : (text || '')}
    </footer>
  );
};

/* ---------- Craft config ---------- */

Footer.craft = {
  displayName: 'Footer',
  props: {
    text: '© 2026 MySite. All rights reserved.',
    style: {
      backgroundColor: '#18181b',
      color: '#a1a1aa',
      fontSize: '14px',
      padding: '24px 20px',
    },
  },
  rules: {
    canDrag: () => true,
    canMoveIn: () => false,
    canMoveOut: () => true,
  },
};

/* ---------- HTML export ---------- */

(Footer as any).toHtml = (props: FooterProps, _childrenHtml: string) => {
  const styleStr = cssPropsToString({
    padding: '24px 20px',
    textAlign: 'center',
    ...props.style,
  });
  const escapedText = (props.text || '').replace(/</g, '&lt;').replace(/>/g, '&gt;');
  return { html: `<footer${styleStr ? ` style="${styleStr}"` : ''}>${escapedText}</footer>` };
};
