import React from 'react';
import type { AvatarDecoration } from '@backspace/shared/src/profile';

interface DecoratedAvatarProps {
  decoration: AvatarDecoration;
  /** Avatar element to decorate; the overlay sizes itself to this box. */
  children: React.ReactNode;
  className?: string;
}

/**
 * Wraps an avatar with a decorative layer. Every decoration is inline SVG on a
 * 100×100 box around the picture — no image assets, so a new one is a few
 * lines of markup and scales to any avatar size.
 */
export function DecoratedAvatar({ decoration, children, className = '' }: DecoratedAvatarProps) {
  return (
    <div className={`relative inline-block ${className}`}>
      {children}
      {decoration !== 'none' && (
        <div className="avatar-deco" aria-hidden="true">
          <Decoration id={decoration} />
        </div>
      )}
    </div>
  );
}

function Decoration({ id }: { id: AvatarDecoration }) {
  switch (id) {
    case 'ring':
      return (
        <svg viewBox="0 0 100 100" className="deco-spin-slow">
          <defs>
            <linearGradient id="deco-ring-g" x1="0" y1="0" x2="1" y2="1">
              <stop offset="0" stopColor="#a78bfa" /><stop offset="0.5" stopColor="#f472b6" /><stop offset="1" stopColor="#fbbf24" />
            </linearGradient>
          </defs>
          <circle cx="50" cy="50" r="46" fill="none" stroke="url(#deco-ring-g)" strokeWidth="4" />
        </svg>
      );
    case 'neon':
      return (
        <svg viewBox="0 0 100 100" className="deco-pulse">
          <circle cx="50" cy="50" r="46" fill="none" stroke="#22d3ee" strokeWidth="3" style={{ filter: 'drop-shadow(0 0 4px #22d3ee) drop-shadow(0 0 10px #a855f7)' }} />
        </svg>
      );
    case 'flames':
      return (
        <svg viewBox="0 0 100 100" className="deco-flicker" style={{ transformOrigin: '50% 100%' }}>
          <defs>
            <linearGradient id="deco-fire-g" x1="0" y1="1" x2="0" y2="0">
              <stop offset="0" stopColor="#ef4444" /><stop offset="0.6" stopColor="#f97316" /><stop offset="1" stopColor="#fde047" />
            </linearGradient>
          </defs>
          <path fill="url(#deco-fire-g)" opacity="0.95"
            d="M50 2 C56 12 62 14 60 24 C68 20 72 12 74 6 C78 18 86 22 86 34 C92 30 94 24 94 20 C98 34 98 48 92 60 C98 62 100 56 100 52 C98 74 84 92 64 98 C50 100 36 98 26 90 C12 82 2 66 4 48 C6 44 10 46 12 50 C10 38 14 30 20 24 C22 30 26 34 30 34 C28 22 34 12 42 6 C44 12 46 14 50 14 Z" />
          <circle cx="50" cy="52" r="42" fill="#0b0b10" />
        </svg>
      );
    case 'stars':
      return (
        <svg viewBox="0 0 100 100" className="deco-spin">
          {[0, 72, 144, 216, 288].map((a) => (
            <g key={a} transform={`rotate(${a} 50 50)`}>
              <path transform="translate(50 6) scale(0.55)" fill="#fde68a" stroke="#f59e0b" strokeWidth="1"
                d="M0 -10 L2.9 -3.1 L10 -3.1 L4.2 1.2 L6.2 8.1 L0 4 L-6.2 8.1 L-4.2 1.2 L-10 -3.1 L-2.9 -3.1 Z" />
            </g>
          ))}
        </svg>
      );
    case 'halo':
      return (
        <svg viewBox="0 0 100 100" className="deco-float">
          <ellipse cx="50" cy="8" rx="30" ry="7" fill="none" stroke="#fde68a" strokeWidth="4" style={{ filter: 'drop-shadow(0 0 6px #fbbf24)' }} />
        </svg>
      );
    case 'vines':
      return (
        <svg viewBox="0 0 100 100">
          <circle cx="50" cy="50" r="46" fill="none" stroke="#166534" strokeWidth="3.5" />
          {[20, 70, 130, 200, 260, 320].map((a) => (
            <g key={a} transform={`rotate(${a} 50 50) translate(50 4)`}>
              <path d="M0 0 C-6 -4 -8 4 -3 8 C2 4 4 -2 0 0 Z" fill="#22c55e" />
              <path d="M0 0 C6 -4 8 4 3 8 C-2 4 -4 -2 0 0 Z" fill="#4ade80" />
            </g>
          ))}
        </svg>
      );
    case 'pixel':
      return (
        <svg viewBox="0 0 100 100" shapeRendering="crispEdges">
          {Array.from({ length: 28 }).map((_, i) => {
            const a = (i / 28) * Math.PI * 2;
            const x = 50 + Math.cos(a) * 45; const y = 50 + Math.sin(a) * 45;
            return <rect key={i} x={Math.round(x / 5) * 5 - 2.5} y={Math.round(y / 5) * 5 - 2.5} width="5" height="5" fill={i % 2 ? '#a855f7' : '#22d3ee'} />;
          })}
        </svg>
      );
    case 'hearts':
      return (
        <svg viewBox="0 0 100 100" className="deco-float">
          {[[8, 20, 1], [88, 14, 0.8], [6, 74, 0.7], [90, 78, 0.9]].map(([x, y, s], i) => (
            <path key={i} transform={`translate(${x} ${y}) scale(${s})`} fill="#fb7185"
              d="M0 6 C-8 -2 -8 -10 -2 -10 C1 -10 0 -8 0 -6 C0 -8 -1 -10 2 -10 C8 -10 8 -2 0 6 Z" />
          ))}
        </svg>
      );
    case 'frost':
      return (
        <svg viewBox="0 0 100 100" className="deco-spin-slow">
          <circle cx="50" cy="50" r="46" fill="none" stroke="#bae6fd" strokeWidth="2" strokeDasharray="3 5" opacity="0.9" />
          {[0, 60, 120, 180, 240, 300].map((a) => (
            <g key={a} transform={`rotate(${a} 50 50) translate(50 3)`} stroke="#e0f2fe" strokeWidth="1.6" strokeLinecap="round" style={{ filter: 'drop-shadow(0 0 3px #7dd3fc)' }}>
              <line x1="0" y1="0" x2="0" y2="10" /><line x1="-4" y1="3" x2="4" y2="7" /><line x1="4" y1="3" x2="-4" y2="7" />
            </g>
          ))}
        </svg>
      );
    case 'crown':
      return (
        <svg viewBox="0 0 100 100" className="deco-float">
          <path transform="translate(50 6)" fill="#fbbf24" stroke="#b45309" strokeWidth="1.5" strokeLinejoin="round"
            d="M-22 6 L-28 -12 L-14 -2 L0 -16 L14 -2 L28 -12 L22 6 Z" />
          <rect x="28" y="12" width="44" height="5" rx="1.5" fill="#f59e0b" stroke="#b45309" strokeWidth="1" />
          <circle cx="36" cy="-4" r="2.4" fill="#f87171" /><circle cx="50" cy="-8" r="2.4" fill="#60a5fa" /><circle cx="64" cy="-4" r="2.4" fill="#4ade80" />
        </svg>
      );
    default:
      return null;
  }
}