// Volume adjustment for audio elements
document.querySelectorAll("audio").forEach((audio) => {
  audio.volume = 0.5; // Volume range is from 0.0 (silent) to 1.0 (maximum)
});

// 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';  // Directly use the target URL
  const response = await fetch(targetUrl);

  // Check if the request was successful
  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 [];
  }

  // Map the songs into a simplified format with direct audio URLs
  const baseUrl = "https://frutigeraeroarchive.org/music/"; // Base URL for the music files
  const playlist = section.li.map(item => ({
    title: item.a.title,
    url: baseUrl + item.a["@data-src-mp3"].split("/").pop(),  // Build the full URL from the base path
                                           background: item.a["@data-background"] || '',  // Optional background if available
                                           artist: item.a["@data-artist"] || '',
                                           spotifyLink: item.a["@data-spotify"] || '',
                                           youtubeLink: item.a["@data-youtube"] || ''
  }));

  // Shuffle the playlist
  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; // Track play/pause state

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

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

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

// Load the current song
function loadSong(index) {
  if (index < 0 || index >= songs.length) return;
  NAV_MUSIC.src = songs[index].url;  // Directly set the audio URL (no proxy needed)
  CURRENT_SONG_INFO.innerText = `Featured song: ${songs[index].title}`;
  NAV_MUSIC.load();
}

// Update button states based on `isPlaying`
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");
  }
}

// Event listeners for playback controls
BUTTON_PLAY.addEventListener("click", function () {
  isPlaying = true;
  NAV_MUSIC.play();
  updateButtonStates();
  saveState();
});

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

BUTTON_PREVIOUS.addEventListener("click", function () {
  currentIndex = currentIndex === 0 ? songs.length - 1 : currentIndex - 1;
  currentTime = 0; // Reset time when switching songs
  loadSong(currentIndex);
  if (isPlaying) {
    NAV_MUSIC.play();
  }
  updateButtonStates();
  saveState();
});

BUTTON_NEXT.addEventListener("click", function () {
  currentIndex = (currentIndex + 1) % songs.length;
  currentTime = 0; // Reset time when switching songs
  loadSong(currentIndex);
  if (isPlaying) {
    NAV_MUSIC.play();
  }
  updateButtonStates();
  saveState();
});

// Autoplay next song when current ends
NAV_MUSIC.addEventListener("ended", function () {
  currentIndex = (currentIndex + 1) % songs.length;
  currentTime = 0; // Reset time when a new song starts
  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 audio if user presses play on another audio element
document.addEventListener(
  "play",
  function (e) {
    var audios = document.getElementsByTagName("audio");
    for (var i = 0, len = audios.length; i < len; i++) {
      if (audios[i] != e.target) {
        audios[i].pause();
      }
    }
  },
  true
);