import React, { CSSProperties } from 'react';
import { useNode, UserComponent } from '@craftjs/core';
import { cssPropsToString } from '../../utils/style-helpers';
import { CtaButton, CtasEditor, normalizeCtas, ctaInlineStyle, ctasToHtml } from './_cta-helpers';
import { AnchorIdField } from '../../ui/AnchorIdField';

interface CTASectionProps {
  heading?: string;
  description?: string;
  ctas?: CtaButton[];
  /** Legacy props kept for backward compat with saved projects. */
  buttonText?: string;
  buttonHref?: string;
  gradient?: string;
  anchorId?: string;
  style?: CSSProperties;
}

const defaultGradient = 'linear-gradient(135deg, #2563eb 0%, #7c3aed 100%)';

export const CTASection: UserComponent<CTASectionProps> = ({
  heading = 'Ready to Get Started?',
  description = 'Join thousands of satisfied users and start building your dream website today.',
  ctas,
  buttonText,
  buttonHref,
  gradient = defaultGradient,
  anchorId,
  style = {},
}) => {
  const {
    connectors: { connect, drag },
    selected,
  } = useNode((node) => ({
    selected: node.events.selected,
  }));

  const effectiveCtas = normalizeCtas({ ctas, buttonText, buttonHref });
  const ctaDefaults = { primaryBg: '#ffffff', primaryText: '#18181b', outlineText: '#ffffff' };

  return (
    <section
      ref={(ref: HTMLElement | null): void => { if (ref) connect(drag(ref)); }}
      id={anchorId || undefined}
      style={{
        background: gradient,
        padding: '80px 20px',
        textAlign: 'center',
        outline: selected ? '2px solid #3b82f6' : 'none',
        ...style,
      }}
    >
      <div style={{ maxWidth: '700px', margin: '0 auto' }}>
        <h2 style={{ fontSize: '36px', fontWeight: '700', color: '#ffffff', marginBottom: '12px' }}>
          {heading}
        </h2>
        <p style={{ fontSize: '18px', color: 'rgba(255,255,255,0.85)', marginBottom: '28px', lineHeight: '1.6' }}>
          {description}
        </p>
        <div style={{ display: 'flex', gap: '12px', justifyContent: 'center', flexWrap: 'wrap' }}>
          {effectiveCtas.map((cta, i) => (
            <a key={i} href={cta.href || '#'} onClick={(e) => e.preventDefault()}
              style={ctaInlineStyle(cta, ctaDefaults)}>
              {cta.text}
            </a>
          ))}
        </div>
      </div>
    </section>
  );
};

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

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

  const gradientPresets = [
    { label: 'Blue-Purple', value: 'linear-gradient(135deg, #2563eb 0%, #7c3aed 100%)' },
    { label: 'Purple', value: 'linear-gradient(135deg, #667eea 0%, #764ba2 100%)' },
    { label: 'Teal', value: 'linear-gradient(135deg, #0d9488 0%, #0f766e 100%)' },
    { label: 'Sunset', value: 'linear-gradient(135deg, #f97316 0%, #ec4899 100%)' },
    { label: 'Dark', value: 'linear-gradient(135deg, #1e293b 0%, #0f172a 100%)' },
    { label: 'Ocean', value: 'linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%)' },
  ];

  const effectiveCtas = normalizeCtas(props);

  return (
    <div style={{ padding: '12px', display: 'flex', flexDirection: 'column', gap: '14px' }}>
      <AnchorIdField />
      <div>
        <label style={{ fontSize: 11, color: '#a1a1aa', display: 'block', marginBottom: 6 }}>Heading</label>
        <input
          type="text"
          value={props.heading || ''}
          onChange={(e) => setProp((p: CTASectionProps) => { p.heading = e.target.value; })}
          style={{ width: '100%', padding: '4px 8px', background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 4, fontSize: 12 }}
        />
      </div>

      <div>
        <label style={{ fontSize: 11, color: '#a1a1aa', display: 'block', marginBottom: 6 }}>Description</label>
        <textarea
          value={props.description || ''}
          onChange={(e) => setProp((p: CTASectionProps) => { p.description = e.target.value; })}
          rows={2}
          style={{ width: '100%', padding: '4px 8px', background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 4, fontSize: 12, resize: 'vertical' }}
        />
      </div>

      <CtasEditor
        ctas={effectiveCtas}
        onChange={(next) => setProp((p: CTASectionProps) => {
          p.ctas = next;
          p.buttonText = undefined;
          p.buttonHref = undefined;
        })}
      />

      <div>
        <label style={{ fontSize: 11, color: '#a1a1aa', display: 'block', marginBottom: 6 }}>Gradient</label>
        <div style={{ display: 'flex', gap: 4, flexWrap: 'wrap' }}>
          {gradientPresets.map((g) => (
            <button
              key={g.label}
              onClick={() => setProp((p: CTASectionProps) => { p.gradient = g.value; })}
              title={g.label}
              style={{
                width: 32, height: 24, borderRadius: 4, border: '1px solid #3f3f46',
                background: g.value, cursor: 'pointer',
                outline: props.gradient === g.value ? '2px solid #3b82f6' : 'none',
                outlineOffset: 1,
              }}
            />
          ))}
        </div>
      </div>
    </div>
  );
};

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

CTASection.craft = {
  displayName: 'CTA Section',
  props: {
    heading: 'Ready to Get Started?',
    description: 'Join thousands of satisfied users and start building your dream website today.',
    ctas: [
      { text: 'Start Free Trial', href: '#', variant: 'primary' },
    ] as CtaButton[],
    gradient: defaultGradient,
    anchorId: '',
    style: {},
  },
  rules: {
    canDrag: () => true,
    canMoveIn: () => false,
    canMoveOut: () => true,
  },
  related: {
    settings: CTASectionSettings,
  },
};

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

(CTASection as any).toHtml = (props: CTASectionProps, _childrenHtml: string) => {
  const esc = (s: any) => String(s ?? "").replace(/</g, '&lt;').replace(/>/g, '&gt;');
  const sectionStyle = cssPropsToString({
    background: props.gradient || defaultGradient,
    padding: '80px 20px',
    textAlign: 'center',
    ...props.style,
  });
  const ctas = normalizeCtas(props);
  const buttonsHtml = ctasToHtml(ctas, { primaryBg: '#ffffff', primaryText: '#18181b', outlineText: '#ffffff' });
  const idAttr = props.anchorId ? ` id="${esc(props.anchorId)}"` : '';
  return {
    html: `<section${idAttr}${sectionStyle ? ` style="${sectionStyle}"` : ''}>
  <div style="max-width:700px;margin:0 auto">
    <h2 style="font-size:36px;font-weight:700;color:#ffffff;margin-bottom:12px">${esc(props.heading || '')}</h2>
    <p style="font-size:18px;color:rgba(255,255,255,0.85);margin-bottom:28px;line-height:1.6">${esc(props.description || '')}</p>
    <div style="display:flex;gap:12px;justify-content:center;flex-wrap:wrap">${buttonsHtml}</div>
  </div>
</section>`,
  };
};