import {
  fingeringMarks,
  fingeringProse,
  type Fingering,
} from "@/lib/fingering";

type HoleState = Fingering["holes"][number];

function Hole({
  cx,
  cy,
  r,
  state,
}: {
  cx: number;
  cy: number;
  r: number;
  state: HoleState;
}) {
  return (
    <g>
      <circle cx={cx} cy={cy} r={r} fill="#fbf6ec" />
      {state === "closed" ? <circle cx={cx} cy={cy} r={r - 1.1} fill="#1c3830" /> : null}
      {state === "half" ? (
        <path
          d={`M ${cx} ${cy - r + 1} A ${r - 1} ${r - 1} 0 0 0 ${cx} ${cy + r - 1} Z`}
          fill="#1c3830"
        />
      ) : null}
      <circle cx={cx} cy={cy} r={r} fill="none" stroke="#5c3d28" strokeWidth="1.6" />
    </g>
  );
}

export function FingeringDiagram({
  fingering,
  pitch,
  size = "lg",
}: {
  fingering: Fingering | null;
  pitch: string;
  size?: "lg" | "sm";
}) {
  const width = size === "lg" ? 112 : 88;
  if (!fingering) {
    return (
      <div
        className="flex items-center justify-center rounded-2xl border border-dashed border-destructive/50 bg-destructive/5 px-2 text-center text-xs leading-snug text-destructive"
        style={{ width, height: size === "lg" ? 220 : 172 }}
        role="img"
        aria-label={`${pitch} is outside the C5 to D7 chart. No fingering is shown.`}
      >
        Outside C5–D7. No fingering.
      </div>
    );
  }

  const [h1, h2, h3, h4, h5, h6a, h6b, h7a, h7b] = fingering.holes;
  const label = `${pitch}. ${fingeringProse(fingering)}. ${fingeringMarks(fingering).join(", ")}`;

  return (
    <svg
      viewBox="0 0 104 228"
      width={width}
      role="img"
      aria-label={label}
      className="h-auto shrink-0"
    >
      <rect x="34" y="8" width="46" height="208" rx="20" fill="#e4cfae" stroke="#6a4328" strokeWidth="2" />
      <path d="M46 28c8-16 22-16 30 0" fill="none" stroke="#6a4328" strokeWidth="2" />
      <Hole cx={18} cy={40} r={8} state={fingering.thumb} />
      <text x={14} y={62} textAnchor="middle" fontSize="8" fill="#6a4328">
        T
      </text>
      <Hole cx={57} cy={58} r={8} state={h1} />
      <Hole cx={57} cy={80} r={8} state={h2} />
      <Hole cx={57} cy={102} r={8} state={h3} />
      <Hole cx={57} cy={132} r={8} state={h4} />
      <Hole cx={57} cy={154} r={8} state={h5} />
      <Hole cx={48} cy={178} r={6.5} state={h6a} />
      <Hole cx={66} cy={178} r={6.5} state={h6b} />
      <Hole cx={48} cy={198} r={6.5} state={h7a} />
      <Hole cx={66} cy={198} r={6.5} state={h7b} />
      <text x={84} y={61} fontSize="8" fill="#7a5a3c">1</text>
      <text x={84} y={83} fontSize="8" fill="#7a5a3c">2</text>
      <text x={84} y={105} fontSize="8" fill="#7a5a3c">3</text>
      <text x={84} y={135} fontSize="8" fill="#7a5a3c">4</text>
      <text x={84} y={157} fontSize="8" fill="#7a5a3c">5</text>
      <text x={84} y={181} fontSize="8" fill="#7a5a3c">6</text>
      <text x={84} y={201} fontSize="8" fill="#7a5a3c">7</text>
      {fingering.bell ? (
        <text x={57} y={222} textAnchor="middle" fontSize="8" fill="#6a4328">
          bell
        </text>
      ) : null}
    </svg>
  );
}

export function RestMark({ label }: { label: string }) {
  const kind = label.includes("whole")
    ? "whole"
    : label.includes("half")
      ? "half"
      : label.includes("sixteenth")
        ? "sixteenth"
        : label.includes("eighth")
          ? "eighth"
          : "quarter";
  return (
    <svg viewBox="0 0 64 120" width={72} className="h-auto" role="img" aria-label={`${label} rest`}>
      <line x1="8" y1="60" x2="56" y2="60" stroke="#c4b39a" strokeWidth="2" />
      {kind === "whole" ? <rect x="20" y="36" width="24" height="14" rx="1" fill="#2a2118" /> : null}
      {kind === "half" ? <rect x="20" y="60" width="24" height="14" rx="1" fill="#2a2118" /> : null}
      {kind === "quarter" ? (
        <path
          d="M34 28c8 8 8 14 0 20s-8 12 2 20 10 10 4 18"
          fill="none"
          stroke="#2a2118"
          strokeWidth="4"
          strokeLinecap="round"
        />
      ) : null}
      {kind === "eighth" || kind === "sixteenth" ? (
        <g fill="#2a2118">
          <circle cx="36" cy="78" r="6" />
          <path d="M36 72c10-14 16-20 8-36" fill="none" stroke="#2a2118" strokeWidth="3" />
          {kind === "sixteenth" ? (
            <path d="M32 64c10-10 14-14 6-26" fill="none" stroke="#2a2118" strokeWidth="3" />
          ) : null}
        </g>
      ) : null}
    </svg>
  );
}