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

interface SpacerProps {
  height?: string;
  style?: CSSProperties;
}

export const Spacer: UserComponent<SpacerProps> = ({
  height = '40px',
  style = {},
}) => {
  const {
    connectors: { connect, drag },
    selected,
  } = useNode((node) => ({
    selected: node.events.selected,
  }));

  return (
    <div
      ref={(ref: HTMLElement | null): void => { if (ref) connect(drag(ref)); }}
      style={{
        height,
        outline: selected ? '2px dashed #3b82f6' : 'none',
        ...style,
        ...(selected && !style.backgroundColor && !style.background
          ? { background: 'rgba(59,130,246,0.05)' }
          : {}),
      }}
    />
  );
};

/* ---------- Settings panel ---------- */

const SpacerSettings: React.FC = () => {
  const { actions: { setProp }, props } = useNode((node) => ({
    props: node.data.props as SpacerProps,
  }));

  const heightPresets = ['20px', '40px', '60px', '80px', '120px'];

  return (
    <div style={{ padding: '12px', display: 'flex', flexDirection: 'column', gap: '14px' }}>
      <div>
        <label style={{ fontSize: 11, color: '#a1a1aa', display: 'block', marginBottom: 6 }}>Height</label>
        <div style={{ display: 'flex', gap: 4, flexWrap: 'wrap' }}>
          {heightPresets.map((h) => (
            <button
              key={h}
              onClick={() => setProp((p: SpacerProps) => { p.height = h; })}
              style={{
                padding: '4px 10px', fontSize: 11, borderRadius: 4, cursor: 'pointer',
                border: '1px solid #3f3f46',
                background: props.height === h ? '#3b82f6' : '#27272a',
                color: '#e4e4e7',
              }}
            >
              {h}
            </button>
          ))}
        </div>
      </div>

      <div>
        <label style={{ fontSize: 11, color: '#a1a1aa', display: 'block', marginBottom: 6 }}>Custom Height</label>
        <input
          type="text"
          value={props.height || ''}
          onChange={(e) => setProp((p: SpacerProps) => { p.height = e.target.value; })}
          placeholder="e.g. 50px, 5rem"
          style={{ width: '100%', padding: '4px 8px', background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 4, fontSize: 11 }}
        />
      </div>
    </div>
  );
};

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

Spacer.craft = {
  displayName: 'Spacer',
  props: {
    height: '40px',
    style: {},
  },
  rules: {
    canDrag: () => true,
    canMoveIn: () => false,
    canMoveOut: () => true,
  },
  related: {
    settings: SpacerSettings,
  },
};

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

(Spacer as any).toHtml = (props: SpacerProps, _childrenHtml: string) => {
  const styleStr = cssPropsToString({
    height: props.height || '40px',
    ...props.style,
  });
  return { html: `<div${styleStr ? ` style="${styleStr}"` : ''}></div>` };
};
