import asyncio
import datetime
import logging
import os
import time
import traceback
import tempfile
from concurrent.futures import ThreadPoolExecutor
from torch.nn.utils.parametrizations import weight_norm
from scipy.io import wavfile
import numpy as np
import traceback
import librosa
import torch
from fairseq import checkpoint_utils
import uuid

from config import Config
from lib.infer_pack.models import (
    SynthesizerTrnMs256NSFsid,
    SynthesizerTrnMs256NSFsid_nono,
    SynthesizerTrnMs768NSFsid,
    SynthesizerTrnMs768NSFsid_nono,
)
from rmvpe import RMVPE
from vc_infer_pipeline import VC

model_cache = {}

logger = logging.getLogger('voice_processing')

def load_model(model_name):
    """
    Loads an RVC model with proper error handling and logging.
    
    Args:
        model_name (str): Name of the model to load (e.g., 'mongolian7-male')
        
    Returns:
        tuple: (model, config) or None if loading fails
    """
    try:
        logger.info(f"Loading model: {model_name}")
        
        # Construct model path
        model_dir = "weights"
        model_path = os.path.join(model_dir, model_name)
        
        # Find .pth file
        pth_files = [f for f in os.listdir(model_path) if f.endswith('.pth')]
        if not pth_files:
            logger.error(f"No .pth file found in {model_path}")
            return None
            
        pth_path = os.path.join(model_path, pth_files[0])
        logger.info(f"Found model file: {pth_path}")
        
        # Load model weights
        cpt = torch.load(pth_path, map_location="cpu", weights_only=True)
        logger.info("Model weights loaded successfully")
        
        # Get configuration
        tgt_sr = cpt["config"][-1]
        cpt["config"][-3] = cpt["weight"]["emb_g.weight"].shape[0]  # n_spk
        if_f0 = cpt.get("f0", 1)
        version = cpt.get("version", "v1")
        
        logger.info(f"Model config: sr={tgt_sr}, if_f0={if_f0}, version={version}")
        
        # Initialize model based on version
        if version == "v1":
            from lib.infer_pack.models import SynthesizerTrnMs256NSFsid
            model = SynthesizerTrnMs256NSFsid(*cpt["config"], is_half=False)
        else:
            from lib.infer_pack.models import SynthesizerTrnMs768NSFsid
            model = SynthesizerTrnMs768NSFsid(*cpt["config"], is_half=False)
        
        # Load weights and prepare model
        model.eval()
        model.load_state_dict(cpt["weight"], strict=False)
        
        logger.info("Model initialized successfully")
        return model
        
    except Exception as e:
        logger.error(f"Error loading model {model_name}: {str(e)}")
        logger.error(traceback.format_exc())
        return None

def process_audio(model, audio_file, logger, index_rate=0, use_uploaded_voice=True, uploaded_voice=None):
    """Process audio through the model"""
    try:
        logger.info("Starting audio processing")
        
        # The model name should come from parallel_tts task parameters
        model_name = [d for d in os.listdir(model_root) if os.path.isdir(f"{model_root}/{d}")][0]
        for m in os.listdir(model_root):
            if os.path.isdir(f"{model_root}/{m}") and "mongolian7-male" in m:
                model_name = m
                break

        logger.info(f"Processing for model: {model_name}")

        # Load audio using librosa directly
        audio, sr = librosa.load(audio_file, sr=16000, mono=True)
        logger.info(f"Loaded audio: sr={sr}Hz, shape={audio.shape}")

        # Get model data using existing function
        tgt_sr, net_g, vc, version, index_file, if_f0 = model_data(model_name)
        
        # Set RMVPE
        vc.model_rmvpe = rmvpe_model

        # Process using the VC pipeline
        times = [0, 0, 0]
        audio_opt = vc.pipeline(
            hubert_model,  # Use global hubert model
            net_g,  # Use the generator from model_data
            0,  # speaker id
            audio,
            audio_file,
            times,
            f0_up_key=0,
            f0_method="rmvpe",
            index_file=index_file,
            index_rate=index_rate,
            if_f0=if_f0,
            filter_radius=3,
            tgt_sr=tgt_sr,
            resample_sr=0,
            rms_mix_rate=0.25,
            version=version,
            protect=0.33,
            f0_file=None
        )

        info = f"Success. Time: npy: {times[0]}s, f0: {times[1]}s, infer: {times[2]}s"
        logger.info(info)
        return (info, None, (tgt_sr, audio_opt))

    except Exception as e:
        logger.error(f"Error processing audio: {str(e)}")
        logger.error(traceback.format_exc())
        return None
        
# Set logging levels
logging.getLogger("fairseq").setLevel(logging.WARNING)
logging.getLogger("numba").setLevel(logging.WARNING)
logging.getLogger("markdown_it").setLevel(logging.WARNING)
logging.getLogger("urllib3").setLevel(logging.WARNING)
logging.getLogger("matplotlib").setLevel(logging.WARNING)

limitation = os.getenv("SYSTEM") == "spaces"

config = Config()

# Edge TTS voices
# tts_voice_list = asyncio.get_event_loop().run_until_complete(edge_tts.list_voices())
# tts_voices = ["mn-MN-BataaNeural", "mn-MN-YesuiNeural"]

# RVC models directory
model_root = "weights"
models = [d for d in os.listdir(model_root) if os.path.isdir(f"{model_root}/{d}")]
models.sort()

def get_unique_filename(extension):
    return f"{uuid.uuid4()}.{extension}"

def model_data(model_name):
    pth_path = [
        f"{model_root}/{model_name}/{f}"
        for f in os.listdir(f"{model_root}/{model_name}")
        if f.endswith(".pth")
    ][0]
    print(f"Loading {pth_path}")
    # Updated model loading with weights_only=True to address the deprecation warning
    cpt = torch.load(pth_path, map_location="cpu", weights_only=True)
    tgt_sr = cpt["config"][-1]
    cpt["config"][-3] = cpt["weight"]["emb_g.weight"].shape[0]  # n_spk
    if_f0 = cpt.get("f0", 1)
    version = cpt.get("version", "v1")
    if version == "v1":
        if if_f0 == 1:
            net_g = SynthesizerTrnMs256NSFsid(*cpt["config"], is_half=config.is_half)
        else:
            net_g = SynthesizerTrnMs256NSFsid_nono(*cpt["config"])
    elif version == "v2":
        if if_f0 == 1:
            net_g = SynthesizerTrnMs768NSFsid(*cpt["config"], is_half=config.is_half)
        else:
            net_g = SynthesizerTrnMs768NSFsid_nono(*cpt["config"])
    else:
        raise ValueError("Unknown version")
    del net_g.enc_q
    net_g.load_state_dict(cpt["weight"], strict=False)
    print("Model loaded")
    net_g.eval().to(config.device)
    if config.is_half:
        net_g = net_g.half()
    else:
        net_g = net_g.float()
    vc = VC(tgt_sr, config)

    index_files = [
        f"{model_root}/{model_name}/{f}"
        for f in os.listdir(f"{model_root}/{model_name}")
        if f.endswith(".index")
    ]
    if len(index_files) == 0:
        print("No index file found")
        index_file = ""
    else:
        index_file = index_files[0]
        print(f"Index file found: {index_file}")

    return tgt_sr, net_g, vc, version, index_file, if_f0

def load_hubert():
    models, _, _ = checkpoint_utils.load_model_ensemble_and_task(
        ["hubert_base.pt"],
        suffix="",
    )
    hubert_model = models[0]
    hubert_model = hubert_model.to(config.device)
    if config.is_half:
        hubert_model = hubert_model.half()
    else:
        hubert_model = hubert_model.float()
    return hubert_model.eval()

def get_model_names():
    return [d for d in os.listdir(model_root) if os.path.isdir(f"{model_root}/{d}")]

# Initialize the global models
hubert_model = load_hubert()
rmvpe_model = RMVPE("rmvpe.pt", config.is_half, config.device)

# voice_mapping = {
#     "Mongolian Male": "mn-MN-BataaNeural",
#     "Mongolian Female": "mn-MN-YesuiNeural"
# }

# Function to run async functions in a new event loop within a thread
def run_async_in_thread(fn, *args):
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    result = loop.run_until_complete(fn(*args))
    loop.close()
    return result

def parallel_tts(tasks):
    """Process multiple TTS tasks"""
    logger.info(f"Received {len(tasks)} tasks for processing")
    results = []
    
    for i, task in enumerate(tasks):
        try:
            logger.info(f"Processing task {i+1}/{len(tasks)}")
            
            model_name, _, _, slang_rate, use_uploaded_voice, audio_file = task
            logger.info(f"Model: {model_name}, Slang rate: {slang_rate}")
            
            model = load_model(model_name)
            if model is None:
                logger.error(f"Failed to load model {model_name}")
                results.append(None)
                continue
                
            result = process_audio(model, audio_file, logger)
            logger.info(f"Processing completed for task {i+1}")
            
            results.append(result)
            
        except Exception as e:
            logger.error(f"Error processing task {i+1}: {str(e)}")
            logger.error(traceback.format_exc())
            results.append(None)
    
    return results