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

interface FeatureItem {
  title: string;
  description: string;
  icon: string;
  image?: string;
  imageAlt?: string;
  buttonText?: string;
  buttonUrl?: string;
}

interface FeaturesGridProps {
  features?: FeatureItem[];
  style?: CSSProperties;
  anchorId?: string;
}

// Keys image/imageAlt/buttonText/buttonUrl are present (blank) on the defaults so
// the guided panel's generic array editor (which derives fields from the first
// item's keys) exposes inputs for them. An image renders whenever `image` is set.
const defaultFeatures: FeatureItem[] = [
  { title: 'Fast & Reliable', description: 'Built for performance with optimized loading and rock-solid uptime.', icon: '⚡', image: '', imageAlt: '', buttonText: '', buttonUrl: '' },
  { title: 'Easy to Use', description: 'Intuitive drag-and-drop interface that anyone can master in minutes.', icon: '✨', image: '', imageAlt: '', buttonText: '', buttonUrl: '' },
  { title: 'Fully Responsive', description: 'Looks great on every device, from phones to ultrawide monitors.', icon: '📱', image: '', imageAlt: '', buttonText: '', buttonUrl: '' },
];

export const FeaturesGrid: UserComponent<FeaturesGridProps> = ({
  features = defaultFeatures,
  style = {},
  anchorId,
}) => {
  const {
    connectors: { connect, drag },
    selected,
  } = useNode((node) => ({
    selected: node.events.selected,
  }));

  return (
    <section
      ref={(ref: HTMLElement | null): void => { if (ref) connect(drag(ref)); }}
      id={anchorId || undefined}
      style={{
        padding: '80px 20px',
        backgroundColor: '#ffffff',
        outline: selected ? '2px solid #3b82f6' : 'none',
        ...style,
      }}
    >
      <div style={{ maxWidth: '1100px', margin: '0 auto', display: 'grid', gridTemplateColumns: 'repeat(3, 1fr)', gap: '32px' }}>
        {(Array.isArray(features) ? features : []).map((feat, i) => (
          <div
            key={i}
            style={{
              textAlign: 'center',
              padding: '32px 24px',
              borderRadius: '12px',
              backgroundColor: '#f8fafc',
              border: '1px solid #e2e8f0',
            }}
          >
            {feat.image ? (
              <img
                src={feat.image}
                alt={feat.imageAlt || feat.title || ''}
                style={{ maxWidth: '100%', height: 'auto', marginBottom: '16px', borderRadius: '8px' }}
              />
            ) : (
              <div style={{ fontSize: '36px', marginBottom: '16px' }}>{feat.icon}</div>
            )}
            <h3 style={{ fontSize: '20px', fontWeight: '600', color: '#18181b', marginBottom: '8px' }}>{feat.title}</h3>
            <p style={{ fontSize: '14px', color: '#64748b', lineHeight: '1.6' }}>{feat.description}</p>
            {feat.buttonText ? (
              <a
                href={feat.buttonUrl || '#'}
                onClick={(e) => e.preventDefault()}
                style={{ display: 'inline-block', marginTop: '16px', padding: '10px 24px', background: '#3b82f6', color: '#fff', borderRadius: '8px', textDecoration: 'none', fontSize: '14px', fontWeight: 600 }}
              >
                {feat.buttonText}
              </a>
            ) : null}
          </div>
        ))}
      </div>
    </section>
  );
};

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

FeaturesGrid.craft = {
  displayName: 'Features Grid',
  props: {
    features: defaultFeatures,
    style: { backgroundColor: '#ffffff' },
    anchorId: '',
  },
  rules: {
    canDrag: () => true,
    canMoveIn: () => false,
    canMoveOut: () => true,
  },
};

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

(FeaturesGrid as any).toHtml = (props: FeaturesGridProps, _childrenHtml: string) => {
  const sectionStyle = cssPropsToString({
    padding: '80px 20px',
    ...props.style,
  });
  const idAttr = props.anchorId ? ` id="${escapeAttr(props.anchorId)}"` : '';
  const cards = (props.features || defaultFeatures).map((feat) => {
    const media = feat.image
      ? `<img src="${escapeAttr(safeUrl(feat.image))}" alt="${escapeAttr(feat.imageAlt || feat.title || '')}" style="max-width:100%;height:auto;margin-bottom:16px;border-radius:8px">`
      : `<div style="font-size:36px;margin-bottom:16px">${escapeHtml(feat.icon)}</div>`;
    const button = feat.buttonText
      ? `\n      <a href="${escapeAttr(safeUrl(feat.buttonUrl || '#'))}" style="display:inline-block;margin-top:16px;padding:10px 24px;background:#3b82f6;color:#fff;border-radius:8px;text-decoration:none;font-size:14px;font-weight:600">${escapeHtml(feat.buttonText)}</a>`
      : '';
    return `<div style="text-align:center;padding:32px 24px;border-radius:12px;background-color:#f8fafc;border:1px solid #e2e8f0">
      ${media}
      <h3 style="font-size:20px;font-weight:600;color:#18181b;margin-bottom:8px">${escapeHtml(feat.title)}</h3>
      <p style="font-size:14px;color:#64748b;line-height:1.6">${escapeHtml(feat.description)}</p>${button}
    </div>`;
  }).join('\n    ');

  return {
    html: `<section${idAttr}${sectionStyle ? ` style="${sectionStyle}"` : ''}>
  <div style="max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:32px">
    ${cards}
  </div>
</section>`,
  };
};