// Volume adjustment for audio elements
document.querySelectorAll("audio").forEach((audio) => {
  audio.volume = 0.5;
});

// Shuffle Playlist (Fisher-Yates)
function fisherYatesShuffle(songs) {
  for (let i = songs.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1));
    [songs[i], songs[j]] = [songs[j], songs[i]];
  }
  return songs;
}

// Load the JSON file containing music data directly from chat.veltron.net
async function loadMusicData() {
  const targetUrl = "https://api.veltron.net/music";
  const response = await fetch(targetUrl);

  if (!response.ok) {
    console.error("Failed to fetch music data:", response.statusText);
    return [];
  }

  const data = await response.json();

  // Get the "frutigerAeroBliss" section from the JSON
  const section = data.ols.find(
    (item) => item["@id"] === "frutigerAeroBliss"
  );

  if (!section) {
    console.error('Section "frutigerAeroBliss" not found.');
    return [];
  }

  // Base domain only — preserve subfolders from data-src-mp3
  const baseUrl = "https://cdn.veltron.net/aero/";

  const playlist = section.li.map((item) => {
    const rawPath = item.a["@data-src-mp3"] || "";

    // Remove leading slash if present, preserve nested folders like music/maplememory/song.mp3
    const normalizedPath = rawPath.replace(/^\/+/, "");

    return {
      title: item.a.title || "Unknown Title",

      // Full path keeps subfolders instead of only filename
      url: baseUrl + normalizedPath,

      background: item.a["@data-background"] || "",
      artist: item.a["@data-artist"] || "",
      spotifyLink: item.a["@data-spotify"] || "",
      youtubeLink: item.a["@data-youtube"] || "",
    };
  });

  return fisherYatesShuffle(playlist);
}

// Define Music Player
const NAV_MUSIC = document.getElementById("navMusic");
const BUTTON_PLAY = document.getElementById("navMusicPlay");
const BUTTON_PAUSE = document.getElementById("navMusicPause");
const BUTTON_PREVIOUS = document.getElementById("navMusicPrevious");
const BUTTON_NEXT = document.getElementById("navMusicNext");
const CURRENT_SONG_INFO = document.getElementById("currentSongInfo");

let songs = [];
let currentIndex = 0;
let currentTime = 0;
let isPlaying = false;

// Save state
function saveState() {
  sessionStorage.setItem("isPlaying", isPlaying);
}

// Load state
function loadState() {
  const savedIsPlaying = sessionStorage.getItem("isPlaying");

  if (savedIsPlaying !== null) {
    isPlaying = savedIsPlaying === "true";
  }
}

// Load song
function loadSong(index) {
  if (index < 0 || index >= songs.length) return;

  NAV_MUSIC.src = songs[index].url;
  CURRENT_SONG_INFO.innerText = `Featured song: ${songs[index].title}`;
  NAV_MUSIC.load();
}

// Update buttons
function updateButtonStates() {
  if (isPlaying) {
    BUTTON_PLAY.classList.add("active");
    BUTTON_PAUSE.classList.remove("active");
  } else {
    BUTTON_PAUSE.classList.add("active");
    BUTTON_PLAY.classList.remove("active");
  }
}

// Play
BUTTON_PLAY.addEventListener("click", function () {
  isPlaying = true;
  NAV_MUSIC.play();
  updateButtonStates();
  saveState();
});

// Pause
BUTTON_PAUSE.addEventListener("click", function () {
  isPlaying = false;
  NAV_MUSIC.pause();
  updateButtonStates();
  saveState();
});

// Previous
BUTTON_PREVIOUS.addEventListener("click", function () {
  currentIndex = currentIndex === 0 ? songs.length - 1 : currentIndex - 1;
  currentTime = 0;
  loadSong(currentIndex);

  if (isPlaying) {
    NAV_MUSIC.play();
  }

  updateButtonStates();
  saveState();
});

// Next
BUTTON_NEXT.addEventListener("click", function () {
  currentIndex = (currentIndex + 1) % songs.length;
  currentTime = 0;
  loadSong(currentIndex);

  if (isPlaying) {
    NAV_MUSIC.play();
  }

  updateButtonStates();
  saveState();
});

// Autoplay next
NAV_MUSIC.addEventListener("ended", function () {
  currentIndex = (currentIndex + 1) % songs.length;
  currentTime = 0;
  loadSong(currentIndex);

  if (isPlaying) {
    NAV_MUSIC.play();
  }

  saveState();
});

// Initial load
window.addEventListener("load", async () => {
  songs = await loadMusicData();

  if (songs.length > 0) {
    loadState();
    loadSong(currentIndex);

    if (isPlaying) {
      NAV_MUSIC.play();
    }

    updateButtonStates();
  }
});

// Pause all other audio elements
document.addEventListener(
  "play",
  function (e) {
    const audios = document.getElementsByTagName("audio");

    for (let i = 0; i < audios.length; i++) {
      if (audios[i] !== e.target) {
        audios[i].pause();
      }
    }
  },
  true
);