/* eslint-disable @next/next/no-img-element -- External card image URLs; next/image migration is out of scope. */
import { VOCAB } from '../../lib/collection-vocabulary.js';
import Button from '../ui/Button.js';
import GlassSurface from '../ui/GlassSurface.js';

const CONDITION_OPTIONS = ['NM', 'LP', 'MP', 'HP', 'DMG'];

function confidencePercent(confidence) {
  if (confidence == null || Number.isNaN(confidence)) return null;
  return confidence <= 1 ? Math.round(confidence * 100) : Math.round(confidence);
}

function confidenceRingColor(pct) {
  if (pct == null) return 'var(--border)';
  if (pct < 70) return 'var(--accent-ember)';
  if (pct < 85) return 'var(--color-warning)';
  return 'var(--color-success)';
}

function confidenceCaption(pct) {
  if (pct == null) return null;
  if (pct >= 90) return 'Excellent match.';
  if (pct >= 70) return 'Good match.';
  return 'Low confidence — verify before adding.';
}

function formatMetadataLine(card) {
  return [card.set, card.rarity, card.cardNumber].filter(Boolean).join(' · ');
}

function EmptyStateIllustration() {
  return (
    <svg
      className="w-16 h-16 mx-auto mb-4"
      fill="none"
      stroke="currentColor"
      viewBox="0 0 24 24"
      aria-hidden="true"
      style={{ color: 'var(--text-secondary)', opacity: 0.6 }}
    >
      <path
        strokeLinecap="round"
        strokeLinejoin="round"
        strokeWidth={1.5}
        d="M3 9a2 2 0 012-2h.93a2 2 0 001.664-.89l.812-1.22A2 2 0 0110.07 4h3.86a2 2 0 011.664.89l.812 1.22A2 2 0 0018.07 7H19a2 2 0 012 2v9a2 2 0 01-2 2H5a2 2 0 01-2-2V9z"
      />
      <path
        strokeLinecap="round"
        strokeLinejoin="round"
        strokeWidth={1.5}
        d="M15 13a3 3 0 11-6 0 3 3 0 016 0z"
      />
    </svg>
  );
}

export default function ScannerResultPanel({
  focusedCard = null,
  queue,
  isIdentifying = false,
  commitError = null,
  onAddToOwned,
  onAddToList,
  onRescan,
}) {
  if (!focusedCard) {
    return (
      <GlassSurface
        tint="low"
        rim="subtle"
        blur="mid"
        elevation="ambient"
        className="rounded-2xl p-6 h-full flex flex-col"
      >
        <h2
          className="text-sm font-medium uppercase tracking-wide mb-6"
          style={{ color: 'var(--text-secondary)' }}
        >
          Scan Result
        </h2>

        <div className="flex-1 flex flex-col items-center justify-center text-center px-4">
          {isIdentifying ? (
            <p className="text-sm" style={{ color: 'var(--text-secondary)' }}>
              Identifying…
            </p>
          ) : (
            <>
              <EmptyStateIllustration />
              <p className="text-sm" style={{ color: 'var(--text-secondary)' }}>
                Point your camera at a card or upload an image to see a match.
              </p>
            </>
          )}
        </div>
      </GlassSurface>
    );
  }

  const card = focusedCard;
  const confidencePct = confidencePercent(card.confidence);
  const isAdding = queue?.addingCardIds?.has(card.id) ?? false;
  const metadataLine = formatMetadataLine(card);

  const handleUpdateMetadata = (patch) => {
    queue?.updateCardMetadata?.(card.id, patch);
  };

  return (
    <GlassSurface
      tint="low"
      rim="subtle"
      blur="mid"
      elevation="ambient"
      className="rounded-2xl p-6 h-full flex flex-col"
    >
      <style>{`
        .scanner-result-confidence-bar-fill {
          transition: width 300ms ease;
        }
        @media (prefers-reduced-motion: reduce) {
          .scanner-result-confidence-bar-fill {
            transition: none;
          }
        }
      `}</style>

      <div className="flex items-center justify-between gap-3 mb-6">
        <h2
          className="text-sm font-medium uppercase tracking-wide"
          style={{ color: 'var(--text-secondary)' }}
        >
          Scan Result
        </h2>
        {confidencePct != null && (
          <span
            className="text-xs font-medium px-2.5 py-1 rounded-full"
            style={{
              backgroundColor: 'var(--bg-secondary)',
              color: 'var(--text-primary)',
              border: `1px solid ${confidenceRingColor(confidencePct)}`,
            }}
          >
            {confidencePct}% Match
          </span>
        )}
      </div>

      <div className="flex-1 overflow-y-auto">
        <div
          className="w-full max-w-[200px] mx-auto mb-4 rounded-xl overflow-hidden"
          style={{
            backgroundColor: 'var(--bg-secondary)',
            border: '1px solid var(--border)',
            aspectRatio: '5 / 7',
          }}
        >
          {card.image_url ? (
            <img
              src={card.image_url}
              alt={card.name}
              className="w-full h-full object-cover"
            />
          ) : (
            <div
              className="w-full h-full flex items-center justify-center"
              style={{ backgroundColor: 'var(--bg-tertiary)', color: 'var(--text-secondary)' }}
            >
              <svg className="w-10 h-10" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z" />
              </svg>
            </div>
          )}
        </div>

        <h3
          className="text-lg font-semibold text-center mb-1"
          style={{ color: 'var(--text-primary)' }}
        >
          {card.name}
        </h3>

        {metadataLine && (
          <p className="text-sm text-center mb-5" style={{ color: 'var(--text-secondary)' }}>
            {metadataLine}
          </p>
        )}

        <div className="space-y-4 mb-6">
          <div>
            <label
              htmlFor={`scanner-result-condition-${card.id}`}
              className="text-xs font-medium block mb-1.5"
              style={{ color: 'var(--text-secondary)' }}
            >
              Condition
            </label>
            <select
              id={`scanner-result-condition-${card.id}`}
              value={card.condition || 'NM'}
              onChange={(e) => handleUpdateMetadata({ condition: e.target.value })}
              className="w-full px-3 py-2 rounded-xl text-sm focus:outline-none focus-visible:ring-2 focus-visible:ring-offset-2"
              style={{
                backgroundColor: 'var(--bg-secondary)',
                border: '1px solid var(--border)',
                color: 'var(--text-primary)',
                minHeight: 44,
                '--tw-ring-color': 'var(--accent-ember)',
                '--tw-ring-offset-color': 'transparent',
              }}
              aria-label={`Condition for ${card.name}`}
            >
              {CONDITION_OPTIONS.map((opt) => (
                <option key={opt} value={opt}>
                  {opt}
                </option>
              ))}
            </select>
          </div>

          <div className="flex items-center justify-between gap-3">
            <span
              id={`scanner-result-foil-label-${card.id}`}
              className="text-xs font-medium"
              style={{ color: 'var(--text-secondary)' }}
            >
              Foil
            </span>
            <button
              type="button"
              role="switch"
              aria-checked={Boolean(card.isFoil)}
              aria-labelledby={`scanner-result-foil-label-${card.id}`}
              onClick={() => handleUpdateMetadata({ isFoil: !card.isFoil })}
              className="relative inline-flex h-7 w-12 flex-shrink-0 rounded-full transition-colors duration-200 focus:outline-none focus-visible:ring-2 focus-visible:ring-offset-2"
              style={{
                backgroundColor: card.isFoil ? 'var(--accent-ember)' : 'var(--bg-tertiary)',
                border: '1px solid var(--border)',
                minWidth: 44,
                minHeight: 44,
                '--tw-ring-color': 'var(--accent-ember)',
                '--tw-ring-offset-color': 'transparent',
              }}
            >
              <span
                className="pointer-events-none inline-block h-5 w-5 transform rounded-full bg-white shadow transition duration-200"
                style={{
                  transform: card.isFoil ? 'translateX(1.35rem)' : 'translateX(0.15rem)',
                  marginTop: '0.35rem',
                }}
                aria-hidden="true"
              />
            </button>
          </div>

          {confidencePct != null && (
            <div>
              <div className="flex items-center justify-between mb-1.5">
                <span className="text-xs font-medium" style={{ color: 'var(--text-secondary)' }}>
                  Confidence
                </span>
                <span className="text-sm font-medium" style={{ color: 'var(--text-primary)' }}>
                  {confidencePct}%
                </span>
              </div>
              <div
                className="h-2 rounded-full overflow-hidden"
                style={{ backgroundColor: 'var(--bg-tertiary)' }}
                role="presentation"
              >
                <div
                  className="scanner-result-confidence-bar-fill h-full rounded-full"
                  style={{
                    width: `${confidencePct}%`,
                    backgroundColor: confidenceRingColor(confidencePct),
                  }}
                />
              </div>
              <p className="text-xs mt-1.5" style={{ color: 'var(--text-secondary)' }}>
                {confidenceCaption(confidencePct)}
              </p>
            </div>
          )}
        </div>
      </div>

      <div className="mt-auto pt-4 space-y-3">
        {commitError && (
          <div
            className="px-3 py-2 rounded-lg text-sm"
            style={{
              backgroundColor: 'color-mix(in srgb, var(--color-error) 12%, transparent)',
              border: '1px solid color-mix(in srgb, var(--color-error) 35%, transparent)',
              color: 'var(--color-error)',
            }}
            role="alert"
          >
            {commitError}
          </div>
        )}

        <Button
          variant="primary"
          className="w-full"
          loading={isAdding}
          disabled={isAdding}
          onClick={() => onAddToOwned?.(card)}
        >
          {VOCAB.ADD_TO_MY_COLLECTION}
        </Button>

        <div className="flex gap-2">
          <Button variant="ghost" className="flex-1" onClick={() => onRescan?.(card)}>
            Rescan
          </Button>
          <Button variant="ghost" className="flex-1" onClick={() => onAddToList?.(card)}>
            {VOCAB.ADD_TO_LIST}
          </Button>
        </div>
      </div>
    </GlassSurface>
  );
}