import { Move } from "chess.js";

let audioContext: AudioContext | null = null;
let timeout: NodeJS.Timeout | null = null;
const soundsCache = new Map<string, AudioBuffer>();

type Sound = "move" | "capture" | "illegalMove";
const soundUrls: Record<Sound, string> = {
  move: "/sounds/move.mp3",
  capture: "/sounds/capture.mp3",
  illegalMove: "/sounds/error.mp3",
};
export const play = async (sound: Sound) => {
  if (timeout) clearTimeout(timeout);

  timeout = setTimeout(async () => {
    if (!audioContext) audioContext = new AudioContext();
    if (audioContext.state === "suspended") await audioContext.resume();

    let audioBuffer = soundsCache.get(soundUrls[sound]);
    if (!audioBuffer) {
      const res = await fetch(soundUrls[sound]);
      const buffer = await audioContext.decodeAudioData(
        await res.arrayBuffer()
      );
      audioBuffer = buffer;
      soundsCache.set(soundUrls[sound], buffer);
    }

    const audioSrc = audioContext.createBufferSource();
    audioSrc.buffer = audioBuffer;
    const volume = audioContext.createGain();
    volume.gain.value = 0.3;
    audioSrc.connect(volume);
    volume.connect(audioContext.destination);
    audioSrc.start();
  }, 1);
};

export const playCaptureSound = () => play("capture");
export const playIllegalMoveSound = () => play("illegalMove");
export const playMoveSound = () => play("move");

export const playSoundFromMove = (move: Move | null) => {
  if (!move) return playIllegalMoveSound();
  if (move.captured) return playCaptureSound();
  return playMoveSound();
};