/* eslint-disable @next/next/no-img-element -- Artwork comes from MinIO CDN / data URLs; next/image is out of scope for the designer canvas. */

import { useEffect, useRef, useState } from 'react';
import { getFrame, getRarity } from './frames';

/** Natural render size of the card (5:7). Everything inside is px-based
 * so screen preview and PNG export are pixel-identical. */
export const CARD_W = 420;
export const CARD_H = 588;

/**
 * Live card renderer for the designer. Renders at CARD_W x CARD_H and is
 * scaled to fit its container by CardPreview below. Fully inline-styled
 * so html-to-image can rasterize it 1:1 during PNG export.
 */
export default function CardFrame({ design, innerRef }) {
  const frame = getFrame(design.frame_id);
  const rarity = getRarity(design.rarity);
  const p = frame.palette;
  const showPt = Boolean(design.power || design.toughness);

  return (
    <div
      ref={innerRef}
      style={{
        width: CARD_W,
        height: CARD_H,
        backgroundColor: p.outer,
        borderRadius: 18,
        border: `6px solid ${p.border}`,
        boxSizing: 'border-box',
        padding: 16,
        display: 'flex',
        flexDirection: 'column',
        fontFamily: 'Georgia, "Times New Roman", serif',
        boxShadow: '0 10px 30px rgba(0,0,0,0.45)',
        userSelect: 'none',
        overflow: 'hidden',
      }}
    >
      {/* Title bar */}
      <div
        style={{
          display: 'flex',
          alignItems: 'center',
          justifyContent: 'space-between',
          gap: 8,
          backgroundColor: p.titleBar,
          border: `1px solid ${p.border}`,
          borderRadius: 6,
          padding: '6px 10px',
          marginBottom: 8,
        }}
      >
        <span
          style={{
            color: p.titleText,
            fontSize: 17,
            fontWeight: 700,
            lineHeight: 1.15,
            overflow: 'hidden',
            textOverflow: 'ellipsis',
            whiteSpace: 'nowrap',
          }}
        >
          {design.name || 'Untitled Card'}
        </span>
        <ManaPips cost={design.mana_cost} accent={p.accent} />
      </div>

      {/* Artwork window */}
      <div
        style={{
          height: 234,
          flexShrink: 0,
          backgroundColor: p.artBacking,
          border: `1px solid ${p.border}`,
          borderRadius: 6,
          overflow: 'hidden',
          marginBottom: 8,
          position: 'relative',
        }}
      >
        {design.artwork_url ? (
          <img
            src={design.artwork_url}
            alt={design.name || 'Card artwork'}
            style={{ width: '100%', height: '100%', objectFit: 'cover', display: 'block' }}
          />
        ) : (
          <div
            style={{
              width: '100%',
              height: '100%',
              display: 'flex',
              flexDirection: 'column',
              alignItems: 'center',
              justifyContent: 'center',
              gap: 8,
              opacity: 0.55,
            }}
          >
            <svg width="96" height="96" viewBox="0 0 24 24" fill="none" stroke={p.border} strokeWidth="1.5">
              <rect x="3" y="3" width="18" height="18" rx="2" />
              <circle cx="8.5" cy="8.5" r="1.5" />
              <path d="M21 15l-5-5L5 21" />
            </svg>
            <span style={{ color: p.border, fontSize: 13, fontStyle: 'italic', fontFamily: 'inherit' }}>
              Upload artwork
            </span>
          </div>
        )}
      </div>

      {/* Type line + rarity gem */}
      <div
        style={{
          position: 'relative',
          display: 'flex',
          alignItems: 'center',
          justifyContent: 'space-between',
          backgroundColor: p.typeBar,
          border: `1px solid ${p.border}`,
          borderRadius: 6,
          padding: '5px 34px 5px 10px',
          marginBottom: 8,
        }}
      >
        <span
          style={{
            color: p.titleText,
            fontSize: 13,
            overflow: 'hidden',
            textOverflow: 'ellipsis',
            whiteSpace: 'nowrap',
          }}
        >
          {design.card_type || '— Type —'}
        </span>
        {/* Rarity gem straddles art/type boundary */}
        <div
          style={{
            position: 'absolute',
            right: 12,
            top: -14,
            width: 16,
            height: 16,
            transform: 'rotate(45deg)',
            backgroundColor: rarity.color,
            border: '2px solid rgba(0,0,0,0.55)',
            boxShadow: 'inset 0 0 4px rgba(255,255,255,0.65)',
          }}
        />
      </div>

      {/* Rules text box */}
      <div
        style={{
          flex: 1,
          backgroundColor: p.textBox,
          border: `1px solid ${p.border}`,
          borderRadius: 6,
          padding: '10px 12px',
          overflow: 'hidden',
          display: 'flex',
          flexDirection: 'column',
          gap: 8,
        }}
      >
        {design.rules_text && (
          <p
            style={{
              margin: 0,
              color: p.text,
              fontSize: 12.5,
              lineHeight: 1.35,
              whiteSpace: 'pre-wrap',
              overflow: 'hidden',
              fontStyle: 'italic',
            }}
          >
            {design.rules_text}
          </p>
        )}
        {design.rules_text && design.actions && (
          <div style={{ borderTop: `1px solid ${p.accent}55`, width: '100%' }} />
        )}
        {design.actions && (
          <p
            style={{
              margin: 0,
              color: p.text,
              fontSize: 12.5,
              lineHeight: 1.35,
              whiteSpace: 'pre-wrap',
              overflow: 'hidden',
            }}
          >
            {design.actions}
          </p>
        )}
        {!design.rules_text && !design.actions && (
          <p
            style={{
              margin: 'auto',
              color: `${p.text}66`,
              fontSize: 12.5,
              fontStyle: 'italic',
            }}
          >
            Description &amp; actions appear here
          </p>
        )}

        {showPt && (
          <div
            style={{
              marginTop: 'auto',
              alignSelf: 'flex-end',
              backgroundColor: p.titleBar,
              color: p.titleText,
              border: `1px solid ${p.border}`,
              borderRadius: 999,
              padding: '1px 14px',
              fontWeight: 700,
              fontSize: 14,
            }}
          >
            {design.power || '0'} / {design.toughness || '0'}
          </div>
        )}
      </div>
    </div>
  );
}

/**
 * Scales CardFrame to fit the available width while preserving the
 * natural 420x588 layout (transform keeps export coordinates intact).
 */
export function CardPreview({ design, innerRef, maxWidth = 420 }) {
  const containerRef = useRef(null);
  const [scale, setScale] = useState(1);

  useEffect(() => {
    const el = containerRef.current;
    if (!el) return undefined;

    const update = () => {
      const available = Math.min(el.clientWidth, maxWidth);
      setScale(Math.min(1, available / CARD_W));
    };

    update();
    const observer = new ResizeObserver(update);
    observer.observe(el);
    return () => observer.disconnect();
  }, [maxWidth]);

  return (
    <div ref={containerRef} style={{ width: '100%', overflow: 'visible' }}>
      <div
        style={{
          width: CARD_W * scale,
          height: CARD_H * scale,
          margin: '0 auto',
        }}
      >
        <div style={{ transform: `scale(${scale})`, transformOrigin: 'top left' }}>
          <CardFrame design={design} innerRef={innerRef} />
        </div>
      </div>
    </div>
  );
}

/**
 * Renders a mana cost string as pip circles. Accepts both scryfall
 * braces ("{2}{R}{R}") and plain notation ("2RR"), plus arbitrary
 * symbols for custom games.
 */
export function ManaPips({ cost, accent }) {
  if (!cost || !cost.trim()) return null;

  const tokens = /\{/.test(cost)
    ? (cost.match(/\{[^}]+\}/g) || []).map((t) => t.slice(1, -1))
    : cost.split(/\s+/).flatMap((chunk) => chunk.split(''));

  if (tokens.length === 0) return null;

  return (
    <span style={{ display: 'inline-flex', gap: 3, flexShrink: 0 }}>
      {tokens.slice(0, 8).map((token, i) => (
        <span
          key={`${token}-${i}`}
          style={{
            display: 'inline-flex',
            alignItems: 'center',
            justifyContent: 'center',
            width: 20,
            height: 20,
            borderRadius: '50%',
            backgroundColor: '#0e0c08',
            border: `1.5px solid ${accent}`,
            color: '#f4efe2',
            fontSize: 12,
            fontWeight: 700,
            fontFamily: 'Georgia, serif',
          }}
        >
          {token}
        </span>
      ))}
    </span>
  );
}