import re
import os
import gc
import tempfile
from uuid import uuid4

import spaces
import gradio as gr
import torchaudio
import numpy as np
from df.enhance import enhance, load_audio, save_audio

from config import Config
from .load_models import *
from .modules.CosyVoice.cosyvoice.utils.file_utils import load_wav


# Helper functions
def create_temp_file():
    return tempfile.NamedTemporaryFile(delete=False)



def assign_language_tags(text):
    return text
    # # Process the text
    # # based on the language assign <|zh|><|en|><|jp|><|yue|><|ko|> for Chinese/English/Japanese/Cantonese/Korean
    # # at the start of the text for that language
    # # e.g. input: 你好 Hello こんにちは 你好 안녕하세요
    # # output: <|zh|>你好<|en|>Hello<|jp|>こんにちは<|yue|>你好<|ko|>안녕하세요
    # # Define language patterns
    # patterns = {
    #     'zh': r'[\u4e00-\u9fff]+',  # Chinese characters
    #     'en': r'[a-zA-Z]+',         # English letters
    #     'jp': r'[\u3040-\u30ff\u31f0-\u31ff]+',  # Japanese characters
    #     'ko': r'[\uac00-\ud7a3]+',  # Korean characters
    # }
    
    # # Find all matches
    # matches = []
    # for lang, pattern in patterns.items():
    #     for match in re.finditer(pattern, text):
    #         matches.append((match.start(), match.end(), lang, match.group()))
    
    # # Sort matches by start position
    # matches.sort(key=lambda x: x[0])
    
    # # Build the result string
    # result = []
    # last_end = 0
    # zh_count = 0
    # for start, end, lang, content in matches:
    #     if start > last_end:
    #         result.append(text[last_end:start])
    #     if lang == 'zh':
    #         zh_count += 1
    #         if zh_count > 1:
    #             lang = 'yue'
    #     result.append(f'<|{lang}|>{content}')
    #     last_end = end
    
    # if last_end < len(text):
    #     result.append(text[last_end:])
    
    # return ''.join(result)


def update_mode(mode, sft_speaker, speaker_audio, voice_instructions):
    if mode == 'SFT':
        return (
            gr.update( # sft_speaker
                
            ),
            gr.update( # speaker_audio,
                visible=False,
            ),
            gr.update( # voice_instructions,
                visible=False,
            ),
        )
    elif mode == 'VC':
        return (
            gr.update( # sft_speaker,
                visible=False,
            ),
            gr.update( # speaker_audio,
                visible=True,
            ),
            gr.update( # voice_instructions,
                visible=True,
            ),
        )
    elif mode == 'VC-CrossLingual':
        return (
            gr.update( # sft_speaker,
                visible=False,
            ),
            gr.update( # speaker_audio,
                visible=True,
            ),
            gr.update( # voice_instructions,
                visible=False,
            ),
        )
    elif mode == 'Instruct':
        return (
            gr.update( # sft_speaker,
                visible=True,
            ),
            gr.update( # speaker_audio,
                visible=False,
            ),
            gr.update( # voice_instructions,
                visible=True,
            ),
        )
    else:
        raise gr.Error('Invalid mode')


@spaces.GPU(duration=10)
def clear_audio(audio: np.ndarray):
    # Save the audio file
    audio_file = create_temp_file()
    np.save(audio_file.name, audio)
    
    # Load the audio file
    audio, _ = load_audio(audio_file.name, sr=df_state.sr())
    enhanced = enhance(df_model, df_state, audio)
    
    # Save the enhanced audio file
    save_audio(audio_file.name, enhanced, df_state.sr())
    
    return gr.update( # speaker_audio, output_audio
        value=audio_file.name,
    )


@spaces.GPU(duration=20)
def gen_audio(text, mode, sft_speaker = None, speaker_audio = None, voice_instructions = None):
    if mode == any(['VC', 'VC-CrossLingual']):
        # Save the speaker audio file
        speaker_audio_file = create_temp_file()
        np.save(speaker_audio_file.name, speaker_audio)
        prompt_speech_16k = load_wav('zero_shot_prompt.wav', 16000)
    else:
        speaker_audio_file = None
        prompt_speech_16k = None

    # Assign language tags
    text = assign_language_tags(text)
    
    # Generate the audio
    out_file = create_temp_file()
    if mode == 'SFT':
        if not sft_speaker:
            raise gr.Error('Please select a speaker')
        
        for i, j in enumerate(cosyvoice_sft.inference_sft(
            tts_text=text,
            spk_id=sft_speaker,
        )):
            torchaudio.save(
                out_file.name.format(i),
                j['tts_speech'],
                22050,
            )
    elif mode == 'VC':
        if not speaker_audio_file:
            raise gr.Error('Please upload an audio')
        
        for i, j in enumerate(cosyvoice.inference_zero_shot(
            tts_text=text,
            prompt_text=voice_instructions,
            prompt_speech_16k=prompt_speech_16k,
        )):
            torchaudio.save(
                out_file.name.format(i),
                j['tts_speech'],
                22050,
            )
    elif mode == 'VC-CrossLingual':
        if not speaker_audio_file:
            raise gr.Error('Please upload an audio')
        
        for i, j in enumerate(cosyvoice.inference_cross_lingual(
            tts_text=text,
            prompt_speech_16k=prompt_speech_16k,
        )):
            torchaudio.save(
                out_file.name.format(i),
                j['tts_speech'],
                22050,
            )
    elif mode == 'Instruct':
        if not voice_instructions:
            raise gr.Error('Please enter voice instructions')
        
        for i, j in enumerate(cosyvoice_instruct.inference_instruct(
            tts_text=text,
            spk_id=sft_speaker,
            instruct_text=voice_instructions,
        )):
            torchaudio.save(
                out_file.name.format(i),
                j['tts_speech'],
                22050,
            )
    
    return gr.update( # output_audio
        value=out_file.name,
    )