'use client';

import { memo } from 'react';
import type { ToothShapeKind } from '@/components/treatment/fdiToothMeta';

interface ToothGlyphProps {
  kind: ToothShapeKind;
  gradientId: string;
  selected: boolean;
  mirrored?: boolean;
}

/** Stylized single tooth for FDI chart (outline + radial fill). Crown above, root(s) below. */
export const ToothGlyph = memo(function ToothGlyph({
  kind,
  gradientId,
  selected,
  mirrored,
}: ToothGlyphProps) {
  const stroke = selected ? 'var(--color-primary)' : '#1e293b';
  const strokeW = selected ? 2.4 : 1.35;
  const filter = selected ? 'drop-shadow(0 0 6px rgba(9, 169, 188, 0.65))' : undefined;

  const inner = () => {
    switch (kind) {
      case 'incisor':
        return (
          <>
            <path
              d="M10 7h16q3 0 3 3v22q0 3-3 3h-16q-3 0-3-3v-22q0-3 3-3z"
              fill={`url(#${gradientId})`}
              stroke={stroke}
              strokeWidth={strokeW}
              strokeLinejoin="round"
            />
            <path
              d="M14 35v26q4 10 8 0v-26"
              fill={`url(#${gradientId})`}
              stroke={stroke}
              strokeWidth={strokeW}
              strokeLinejoin="round"
            />
          </>
        );
      case 'canine':
        return (
          <>
            <path
              d="M18 6 L26 14 L24 35 H12 L10 14 Z"
              fill={`url(#${gradientId})`}
              stroke={stroke}
              strokeWidth={strokeW}
              strokeLinejoin="round"
            />
            <path
              d="M14 35 L12 62 Q18 74 24 62 L22 35 Z"
              fill={`url(#${gradientId})`}
              stroke={stroke}
              strokeWidth={strokeW}
              strokeLinejoin="round"
            />
          </>
        );
      case 'premolar':
        return (
          <>
            <path
              d="M8 12 Q18 6 28 12 L30 22 Q31 28 26 34 H10 Q5 28 6 22 Z"
              fill={`url(#${gradientId})`}
              stroke={stroke}
              strokeWidth={strokeW}
              strokeLinejoin="round"
            />
            <path
              d="M11 34 L10 58 Q18 68 26 58 L25 34 Q18 30 11 34 Z"
              fill={`url(#${gradientId})`}
              stroke={stroke}
              strokeWidth={strokeW}
              strokeLinejoin="round"
            />
          </>
        );
      case 'molar':
        return (
          <>
            <path
              d="M6 14 Q10 8 14 10 Q18 7 22 10 Q26 8 30 14 L31 26 Q32 32 27 36 H9 Q4 32 5 26 Z"
              fill={`url(#${gradientId})`}
              stroke={stroke}
              strokeWidth={strokeW}
              strokeLinejoin="round"
            />
            <path
              d="M10 36 L8 56 Q14 66 18 58 Q22 66 28 56 L26 36 Q18 32 10 36 Z"
              fill={`url(#${gradientId})`}
              stroke={stroke}
              strokeWidth={strokeW}
              strokeLinejoin="round"
            />
            <path
              d="M12 58 Q18 72 24 58"
              fill="none"
              stroke={stroke}
              strokeWidth={strokeW * 0.85}
              strokeLinecap="round"
            />
          </>
        );
      default:
        return null;
    }
  };

  return (
    <svg
      viewBox="0 0 36 78"
      className="w-8 h-[4.85rem] shrink-0"
      style={{ filter }}
      aria-hidden
    >
      <defs>
        <radialGradient id={gradientId} cx="45%" cy="35%" r="65%">
          <stop
            offset="0%"
            stopColor={selected ? '#cffafe' : '#ffffff'}
          />
          <stop
            offset="55%"
            stopColor={selected ? '#5eead4' : '#e0f2fe'}
          />
          <stop
            offset="100%"
            stopColor={selected ? '#0e7490' : '#93c5fd'}
          />
        </radialGradient>
      </defs>
      <g transform={mirrored ? 'translate(36 0) scale(-1 1)' : undefined}>{inner()}</g>
    </svg>
  );
});