import React, { useEffect } from 'react';
import { useSiteDesign } from '../../state/SiteDesignContext';

interface HeadCodeModalProps {
  open: boolean;
  onClose: () => void;
}

export const HeadCodeModal: React.FC<HeadCodeModalProps> = ({ open, onClose }) => {
  const { design, updateDesign } = useSiteDesign();

  useEffect(() => {
    if (!open) return;
    const handler = (e: KeyboardEvent) => {
      if (e.key === 'Escape') onClose();
    };
    window.addEventListener('keydown', handler);
    return () => window.removeEventListener('keydown', handler);
  }, [open, onClose]);

  if (!open) return null;

  return (
    <div style={backdropStyle} onClick={onClose}>
      <div style={modalStyle} onClick={(e) => e.stopPropagation()}>
        {/* Header */}
        <div style={modalHeaderStyle}>
          <div style={{ display: 'flex', alignItems: 'center', gap: 10 }}>
            <i className="fa fa-code" style={{ color: 'var(--color-accent)', fontSize: 16 }} />
            <div>
              <div style={{ fontSize: 15, fontWeight: 600, color: 'var(--color-text)' }}>
                Custom Head Code
              </div>
              <div style={{ fontSize: 11, color: 'var(--color-text-muted)', marginTop: 2 }}>
                Add tracking scripts, meta tags, or custom CSS to your site's &lt;head&gt; section.
              </div>
            </div>
          </div>
          <button onClick={onClose} style={closeButtonStyle}>
            <i className="fa fa-times" />
          </button>
        </div>

        {/* Body */}
        <div style={{ padding: 20, flex: 1, display: 'flex', flexDirection: 'column', gap: 12 }}>
          <div style={{
            padding: '10px 14px',
            background: 'rgba(59,130,246,0.08)',
            border: '1px solid rgba(59,130,246,0.2)',
            borderRadius: 6,
            fontSize: 12,
            color: 'var(--color-text-muted)',
            lineHeight: 1.5,
          }}>
            <i className="fa fa-info-circle" style={{ color: 'var(--color-accent)', marginRight: 6 }} />
            Code added here will be injected into the <code style={{ background: 'rgba(255,255,255,0.08)', padding: '1px 4px', borderRadius: 3, fontSize: 11 }}>&lt;head&gt;</code> of every page on your site. Use it for analytics, custom fonts, or global CSS.
          </div>

          <textarea
            value={design.headCode || ''}
            onChange={(e) => updateDesign({ headCode: e.target.value })}
            placeholder={"<!-- Google Analytics -->\n<script async src=\"https://...\"></script>\n\n<!-- Custom Fonts -->\n<link href=\"https://fonts.googleapis.com/...\" rel=\"stylesheet\">\n\n<style>\n  /* Global CSS overrides */\n  body { }\n</style>"}
            style={{
              flex: 1,
              minHeight: 300,
              padding: 14,
              background: '#0d0d0f',
              color: '#e4e4e7',
              border: '1px solid #3f3f46',
              borderRadius: 8,
              fontFamily: 'Source Code Pro, Consolas, monospace',
              fontSize: 13,
              lineHeight: 1.6,
              resize: 'vertical',
              outline: 'none',
              tabSize: 2,
            }}
            spellCheck={false}
          />
        </div>

        {/* Footer */}
        <div style={{
          padding: '12px 20px',
          borderTop: '1px solid var(--color-border)',
          display: 'flex',
          justifyContent: 'flex-end',
          gap: 8,
        }}>
          <button onClick={onClose} style={doneButtonStyle}>
            Done
          </button>
        </div>
      </div>
    </div>
  );
};

/* ---------- Styles ---------- */

const backdropStyle: React.CSSProperties = {
  position: 'fixed',
  top: 0,
  left: 0,
  right: 0,
  bottom: 0,
  backgroundColor: 'rgba(0, 0, 0, 0.65)',
  display: 'flex',
  alignItems: 'center',
  justifyContent: 'center',
  zIndex: 10000,
};

const modalStyle: React.CSSProperties = {
  width: '90vw',
  maxWidth: 700,
  maxHeight: '80vh',
  backgroundColor: 'var(--color-bg-surface)',
  borderRadius: 12,
  border: '1px solid var(--color-border)',
  display: 'flex',
  flexDirection: 'column',
  overflow: 'hidden',
  boxShadow: '0 20px 60px rgba(0,0,0,0.5)',
};

const modalHeaderStyle: React.CSSProperties = {
  display: 'flex',
  alignItems: 'center',
  justifyContent: 'space-between',
  padding: '16px 20px',
  borderBottom: '1px solid var(--color-border)',
  flexShrink: 0,
};

const closeButtonStyle: React.CSSProperties = {
  width: 32,
  height: 32,
  display: 'inline-flex',
  alignItems: 'center',
  justifyContent: 'center',
  background: 'none',
  border: '1px solid var(--color-border)',
  borderRadius: 6,
  color: 'var(--color-text-muted)',
  cursor: 'pointer',
  fontSize: 14,
};

const doneButtonStyle: React.CSSProperties = {
  padding: '8px 24px',
  fontSize: 13,
  fontWeight: 600,
  background: 'var(--color-accent)',
  color: '#fff',
  border: 'none',
  borderRadius: 6,
  cursor: 'pointer',
};