// Simple MySpace-style music player with fake EQ bars

document.addEventListener("DOMContentLoaded", () => {
  // === PLAYLIST ===
  const playlist = [
    {
      title: "The Ocean",
      artist: "Super Fuzz",
      src: "https://cdn-uploads.huggingface.co/production/uploads/693f06e4c231c8267144eb68/WwdKDnPZAW9q7tXWomfSY.mpga",
    },
  ];

  // === GRAB ELEMENTS FROM THE PAGE ===
  const audioEl = document.getElementById("audio-player");
  const titleEl = document.getElementById("track-title");
  const artistEl = document.getElementById("track-artist");
  const playPauseBtn = document.getElementById("play-pause-btn");
  const prevBtn = document.getElementById("prev-btn");
  const nextBtn = document.getElementById("next-btn");
  const seekBar = document.getElementById("seek-bar");
  const eqBars = document.querySelectorAll(".eq-visualizer .eq-bar");

  // Safety check – if something's missing, don't crash
  if (
    !audioEl ||
    !titleEl ||
    !artistEl ||
    !playPauseBtn ||
    !prevBtn ||
    !nextBtn ||
    !seekBar
  ) {
    console.warn("Music player: required elements not found.");
    return;
  }

  let currentTrackIndex = 0;
  let isPlaying = false;
  let isSeeking = false;
  let eqInterval = null;

  // === EQ BAR ANIMATION (FAKE VISUALIZER) ===

  function startEq() {
    if (!eqBars.length || eqInterval) return;
    eqInterval = setInterval(() => {
      eqBars.forEach((bar) => {
        const height = 20 + Math.random() * 80; // 20%–100%
        bar.style.height = `${height}%`;
      });
    }, 120);
  }

  function stopEq() {
    if (eqInterval) {
      clearInterval(eqInterval);
      eqInterval = null;
    }
    eqBars.forEach((bar) => {
      bar.style.height = "25%"; // idle height
    });
  }

  // === CORE FUNCTIONS ===

  function loadTrack(index) {
    const track = playlist[index];
    if (!track) return;

    titleEl.textContent = track.title;
    artistEl.textContent = track.artist;
    audioEl.src = track.src;
  }

  function playTrack() {
    if (!audioEl.src) {
      // just in case loadTrack didn't run for some reason
      loadTrack(currentTrackIndex);
    }

    const playPromise = audioEl.play();

    if (playPromise !== undefined) {
      playPromise
        .then(() => {
          isPlaying = true;
          playPauseBtn.textContent = "⏸"; // pause icon
          startEq();
        })
        .catch((err) => {
          console.warn("Autoplay/play blocked or failed:", err);
        });
    }
  }

  function pauseTrack() {
    audioEl.pause();
    isPlaying = false;
    playPauseBtn.textContent = "▶"; // play icon
    stopEq();
  }

  function togglePlay() {
    if (isPlaying) {
      pauseTrack();
    } else {
      playTrack();
    }
  }

  function playNext() {
    currentTrackIndex = (currentTrackIndex + 1) % playlist.length;
    loadTrack(currentTrackIndex);
    playTrack();
  }

  function playPrev() {
    currentTrackIndex =
      (currentTrackIndex - 1 + playlist.length) % playlist.length;
    loadTrack(currentTrackIndex);
    playTrack();
  }

  // === EVENT LISTENERS ===

  // Play / Pause button
  playPauseBtn.addEventListener("click", togglePlay);

  // Next / Previous
  nextBtn.addEventListener("click", playNext);
  prevBtn.addEventListener("click", playPrev);

  // Keep seek bar in sync with audio
  audioEl.addEventListener("timeupdate", () => {
    if (!audioEl.duration || isSeeking) return;
    const progress = (audioEl.currentTime / audioEl.duration) * 100;
    seekBar.value = progress;
  });

  // Scrub / seek when user drags the slider
  seekBar.addEventListener("input", () => {
    if (!audioEl.duration) return;
    isSeeking = true;
    const newTime = (seekBar.value / 100) * audioEl.duration;
    audioEl.currentTime = newTime;
  });

  seekBar.addEventListener("change", () => {
    isSeeking = false;
  });

  // When a track ends, loop playlist
  audioEl.addEventListener("ended", () => {
    playNext();
  });

  // If there's an audio error (bad URL, etc.)
  audioEl.addEventListener("error", (e) => {
    console.warn("Audio element error:", e);
  });

  // === INITIALIZE ===

  // Load first track
  loadTrack(currentTrackIndex);

  // Try autoplay on load (browser may block this until user clicks)
  playTrack();
});