import asyncio
import os
import logging
import time
from aiogram import Bot, Dispatcher, types, BaseMiddleware, F
from aiogram.filters import Command
from aiogram.types import FSInputFile, InlineKeyboardMarkup, InlineKeyboardButton, CallbackQuery
from aiogram.client.default import DefaultBotProperties
from aiogram.client.session.aiohttp import AiohttpSession
from dotenv import load_dotenv
from apscheduler.schedulers.asyncio import AsyncIOScheduler

from yt_engine import process_youtube_request, get_recommendations
from db_manager import db
from s3_manager import upload_audio, download_audio, delete_audio

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

load_dotenv()
BOT_TOKEN = os.getenv("BOT_TOKEN")
AUTHORIZED_USER_ID = int(os.getenv("AUTHORIZED_USER_ID", 0))

session = AiohttpSession(timeout=300)
# Matikan parse_mode default agar aman dari error karakter aneh di judul lagu YouTube
bot = Bot(token=BOT_TOKEN, session=session, default=DefaultBotProperties(parse_mode=None))
dp = Dispatcher()

# Antrean sederhana (FIFO)
music_queue = asyncio.Queue()

async def queue_worker():
    """Memproses lagu satu per satu dari antrean agar server tidak meledak"""
    while True:
        query, chat_id, msg_id = await music_queue.get()
        try:
            await process_music_request(query, chat_id, msg_id)
        except Exception as e:
            logger.error(f"Worker Error: {e}")
        finally:
            music_queue.task_done()

# Satpam Bot
class SecurityMiddleware(BaseMiddleware):
    async def __call__(self, handler, event: types.Message | CallbackQuery, data: dict):
        if event.from_user.id != AUTHORIZED_USER_ID: return
        return await handler(event, data)

dp.message.middleware(SecurityMiddleware())
dp.callback_query.middleware(SecurityMiddleware())

# --- COMMANDS ---
@dp.message(Command("start"))
async def cmd_start(message: types.Message):
    await message.answer("🎧 **Music Bot Ready!**\nKirim format: `/play <judul lagu>`\nSetelah lagu terkirim, klik rekomendasi di bawahnya untuk melanjutkan.", parse_mode="Markdown")

@dp.message(Command("play"))
async def cmd_play(message: types.Message):
    query = message.text.replace("/play", "").strip()
    if not query:
        return await message.answer("⚠️ Masukkan judul lagu. Contoh: /play Dewa 19 Kangen")

    status_msg = await message.answer("⏳ Memproses pesananmu...")
    await music_queue.put((query, message.chat.id, status_msg.message_id))

# --- HANDLER TOMBOL SUGGESTION ---
@dp.callback_query(F.data.startswith("play_"))
async def handle_suggestion_click(callback: CallbackQuery):
    video_id = callback.data.split("_", 1)[1]
    
    # 1. Hapus tombol di pesan sebelumnya biar chat nggak penuh tombol mati
    await callback.message.edit_reply_markup(reply_markup=None)
    
    # 2. Kirim status baru
    status_msg = await bot.send_message(callback.message.chat.id, "⏳ Mengunduh lagu pilihanmu...")
    query_url = f"https://www.youtube.com/watch?v={video_id}"
    
    # 3. Masukkan ke antrean
    await music_queue.put((query_url, callback.message.chat.id, status_msg.message_id))
    await callback.answer("Siapp! Diproses...")

# --- CORE LOGIC ---
async def process_music_request(query: str, chat_id: int, status_msg_id: int):
    local_file = None
    total_start_time = time.time() # ⏱️ START TIMER TOTAL
    
    try:
        logger.info(f"▶️ MEMULAI PROSES LAGU: {query}")
        await bot.edit_message_text("🔍 Mencari ke YouTube...", chat_id, status_msg_id)
        
        # --- FASE 1: YOUTUBE & FFMPEG ---
        t_yt_start = time.time()
        yt_result = await process_youtube_request(query)
        t_yt_end = time.time()
        logger.info(f"⏱️ [FASE 1] yt-dlp & FFmpeg memakan waktu: {t_yt_end - t_yt_start:.2f} detik")
        
        if yt_result["status"] == "error":
            return await bot.edit_message_text(f"❌ Gagal: {yt_result['message']}", chat_id, status_msg_id)
            
        video_id = yt_result["video_id"]
        title = yt_result["title"]
        local_file = yt_result["file_path"]
        s3_object_name = f"{video_id}.mp3"

        # --- FASE 2: MINIO S3 ---
        t_s3_start = time.time()
        cached_data = await db.get_cache(video_id)
        if cached_data:
            await bot.edit_message_text("⚡ Mengambil dari Cache (MinIO)...", chat_id, status_msg_id)
            local_file = f"downloads/cache_{video_id}.mp3"
            await download_audio(s3_object_name, local_file)
            logger.info(f"⏱️ [FASE 2] Download dari MinIO memakan waktu: {time.time() - t_s3_start:.2f} detik")
        else:
            await bot.edit_message_text("☁️ Mengunggah ke MinIO Server...", chat_id, status_msg_id)
            if local_file and os.path.exists(local_file):
                await upload_audio(local_file, s3_object_name)
                await db.save_cache(video_id, title, s3_object_name)
            logger.info(f"⏱️ [FASE 2] Upload ke MinIO memakan waktu: {time.time() - t_s3_start:.2f} detik")

        # --- FASE 3: TELEGRAM UPLOAD ---
        await bot.edit_message_text("📤 Mengirim file ke Telegram...", chat_id, status_msg_id)
        
        if local_file and os.path.exists(local_file):
            t_tele_start = time.time()
            audio = FSInputFile(local_file)
            await bot.send_audio(chat_id=chat_id, audio=audio, title=title, performer="Music Bot", request_timeout=300)
            t_tele_end = time.time()
            logger.info(f"⏱️ [FASE 3] Upload ke Telegram memakan waktu: {t_tele_end - t_tele_start:.2f} detik")
            
            if status_msg_id:
                await bot.delete_message(chat_id, status_msg_id)
            
            # --- SUGGEST 5 LAGU ---
            t_recs_start = time.time()
            recs = await get_recommendations(video_id)
            logger.info(f"⏱️ [FASE 4] Fetch Rekomendasi memakan waktu: {time.time() - t_recs_start:.2f} detik")
            
            if recs:
                kb = []
                for rec in recs[:5]:
                    short_title = rec['title'][:60] + "..." if len(rec['title']) > 60 else rec['title']
                    kb.append([InlineKeyboardButton(text=f"▶️ {short_title}", callback_data=f"play_{rec['id']}")])
                
                reply_markup = InlineKeyboardMarkup(inline_keyboard=kb)
                await bot.send_message(
                    chat_id=chat_id, 
                    text=f"💡 **Rekomendasi dari:**\n_{title}_", 
                    reply_markup=reply_markup,
                    parse_mode="Markdown"
                )

        logger.info(f"✅ TOTAL WAKTU E2E: {time.time() - total_start_time:.2f} detik\n{'-'*40}")

    except Exception as e:
        logger.error(f"Error: {e}")
        try:
            await bot.edit_message_text("❌ Terjadi kesalahan internal saat memproses lagu.", chat_id, status_msg_id)
        except: pass
    finally:
        if local_file and os.path.exists(local_file):
            os.remove(local_file)

# --- AUTO CLEANUP CACHE ---
async def cleanup_expired_cache():
    expired_items = await db.get_expired_cache(days=7)
    for item in expired_items:
        await delete_audio(item['s3_object_key'])
        await db.delete_cache(item['youtube_id'])

# --- MAIN RUNNER ---
async def main():
    await db.connect()
    asyncio.create_task(queue_worker())
    
    scheduler = AsyncIOScheduler()
    scheduler.add_job(cleanup_expired_cache, 'cron', hour=3, minute=0)
    scheduler.start()
    
    logger.info("🚀 Bot Music - Mode Interactive Playlist Berjalan!")
    await bot.delete_webhook(drop_pending_updates=True)
    await dp.start_polling(bot)

if __name__ == "__main__":
    asyncio.run(main())