import discord
import yt_dlp
import asyncio
import os
import json
import requests
import time
from dotenv import load_dotenv
from typing import List, Dict, Any

load_dotenv()

voice_clients: Dict[int, discord.VoiceClient] = {}
music_queues: Dict[int, List[Any]] = {}
current_tracks: Dict[int, Any] = {}
volumes: Dict[int, float] = {}
repeat_modes: Dict[int, str] = {}
now_playing_messages: Dict[int, int] = {}
progress_tasks: Dict[int, asyncio.Task] = {}
_247_mode: Dict[int, bool] = {}

default_volume: float = 0.05
USER_DATA_FILE: str = 'user_data.json'
YOUTUBE_API_KEY: str | None = os.getenv("YOUTUBE_API_KEY")


# ---------- Utility Functions ----------
def load_user_data() -> Dict[str, Any]:
    if not os.path.exists(USER_DATA_FILE):
        return {}
    with open(USER_DATA_FILE, 'r') as f:
        return json.load(f)


def save_user_data(data: Dict[str, Any]) -> None:
    with open(USER_DATA_FILE, 'w') as f:
        json.dump(data, f, indent=4)


def update_user_history(user_id: int, song_title: str, artist: str) -> None:
    user_data = load_user_data()
    if str(user_id) not in user_data:
        user_data[str(user_id)] = {"history": []}

    user_data[str(user_id)]["history"].append({"title": song_title, "artist": artist})
    save_user_data(user_data)


# ---------- Playback Functions ----------
async def join_voice(interaction: discord.Interaction) -> bool:
    guild_id = interaction.guild.id
    channel = interaction.user.voice.channel

    if guild_id in voice_clients and voice_clients[guild_id].channel == channel:
        return True

    try:
        voice_client = await channel.connect()
        voice_clients[guild_id] = voice_client
        return True
    except Exception as e:
        await interaction.followup.send(f"❌ **Error:** Could not join the voice channel. {str(e)}")
        return False


async def play_audio(interaction: discord.Interaction, query: str) -> None:
    guild_id = interaction.guild.id

    if not interaction.response.is_done():
        await interaction.response.defer()

    if guild_id not in voice_clients or not voice_clients[guild_id].is_connected():
        joined = await join_voice(interaction)
        if not joined:
            await interaction.followup.send("❌ **Error:** Could not join the voice channel.")
            return

    asyncio.create_task(fetch_and_queue_song(interaction, query))


async def fetch_and_queue_song(interaction: discord.Interaction, query: str) -> None:
    guild_id = interaction.guild.id
    ydl_opts = {
        'format': 'bestaudio/best',
        'quiet': True,
    }
    try:
        with yt_dlp.YoutubeDL(ydl_opts) as ydl:
            info = ydl.extract_info(f"ytsearch:{query}", download=False)['entries'][0]
    except Exception as e:
        await interaction.followup.send(f"❌ **Error:** Could not find or play the requested audio. {str(e)}")
        return

    song_url = info['url']
    title = info.get('title', 'Unknown Title')
    artist = info.get('uploader', 'Unknown Artist')
    duration = info.get('duration', 0)

    update_user_history(interaction.user.id, title, artist)

    if guild_id not in music_queues:
        music_queues[guild_id] = []

    music_queues[guild_id].append((song_url, title, duration))
    await interaction.followup.send(f"✅ **Added to Queue:** {title}")

    if not voice_clients[guild_id].is_playing():
        await play_next(interaction)


async def play_next(interaction: discord.Interaction) -> None:
    guild_id = interaction.guild.id

    if guild_id not in music_queues or not music_queues[guild_id]:
        if _247_mode.get(guild_id, True):
            if guild_id in now_playing_messages and now_playing_messages[guild_id]:
                try:
                    message = await interaction.channel.fetch_message(now_playing_messages[guild_id])
                    embed = discord.Embed(
                        title="🎵 Queue Empty",
                        description="Amber is in 24/7 mode. Add more songs to the queue to resume playback.",
                        color=discord.Color.orange()
                    )
                    await message.edit(embed=embed, view=None)
                except discord.NotFound:
                    pass
            return
        else:
            if guild_id in voice_clients and voice_clients[guild_id].is_connected():
                await voice_clients[guild_id].disconnect()
                del voice_clients[guild_id]
            return

    song_url, title, duration = music_queues[guild_id].pop(0)
    current_tracks[guild_id] = (song_url, title)

    ffmpeg_options = {
        'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5',
        'options': '-vn',
    }

    try:
        voice_client = voice_clients[guild_id]
        source = discord.FFmpegPCMAudio(song_url, **ffmpeg_options)
        volume = volumes.get(guild_id, default_volume)
        source = discord.PCMVolumeTransformer(source, volume=volume)

        voice_client.play(
            source,
            after=lambda e: asyncio.run_coroutine_threadsafe(
                play_next(interaction), interaction.client.loop
            ),
        )

        embed = discord.Embed(
            title="🎵 Now Playing",
            description=f"**{title}**\n\n`00:00 / {time.strftime('%M:%S', time.gmtime(duration))}`",
            color=discord.Color.green()
        )
        embed.set_thumbnail(url=f"https://img.youtube.com/vi/{song_url.split('?v=')[-1]}/0.jpg")
        embed.add_field(name="Artist", value=artist, inline=True)
        embed.set_footer(text="React with 👍 or 👎 to rate this song!")
        view = PlaybackControls(interaction, guild_id)

        if guild_id in now_playing_messages and now_playing_messages[guild_id]:
            try:
                message = await interaction.channel.fetch_message(now_playing_messages[guild_id])
                await message.edit(embed=embed, view=view)
            except discord.NotFound:
                message = await interaction.followup.send(embed=embed, view=view)
                now_playing_messages[guild_id] = message.id
        else:
            message = await interaction.followup.send(embed=embed, view=view)
            now_playing_messages[guild_id] = message.id

        start_time = time.time()
        asyncio.create_task(update_progress_bar(interaction, duration, start_time))
    except Exception as e:
        await interaction.followup.send(f"❌ **Error:** Could not play the next song. {str(e)}")


async def update_progress_bar(interaction: discord.Interaction, duration: int, start_time: float) -> None:
    guild_id = interaction.guild.id

    try:
        while guild_id in voice_clients and voice_clients[guild_id].is_playing():
            elapsed_time = time.time() - start_time
            progress = min(elapsed_time / duration, 1.0)
            progress_blocks = int(progress * 20)
            progress_bar = "▬" * progress_blocks + "🔘" + "▬" * (20 - progress_blocks)
            elapsed_time_str = time.strftime("%M:%S", time.gmtime(elapsed_time))
            duration_str = time.strftime("%M:%S", time.gmtime(duration))

            embed = discord.Embed(
                title="🎵 Now Playing",
                description=f"**{current_tracks[guild_id][1]}**\n\n{progress_bar} `{elapsed_time_str} / {duration_str}`",
                color=discord.Color.green()
            )

            if guild_id in now_playing_messages and now_playing_messages[guild_id]:
                message_id = now_playing_messages[guild_id]
                try:
                    message = await interaction.channel.fetch_message(message_id)
                    await message.edit(embed=embed)
                except discord.NotFound:
                    break
            await asyncio.sleep(1)
    except asyncio.CancelledError:
        pass