import logging
import os
import pathlib
import time
import tempfile
import platform
import gc
if platform.system().lower() == 'windows':
    temp = pathlib.PosixPath
    pathlib.PosixPath = pathlib.WindowsPath
elif platform.system().lower() == 'linux':
    temp = pathlib.WindowsPath
    pathlib.WindowsPath = pathlib.PosixPath
os.environ["PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION"] = "python"

import langid
langid.set_languages(['en', 'zh', 'ja'])

import torch
import torchaudio

import numpy as np

from data.tokenizer import (
    AudioTokenizer,
    tokenize_audio,
)
from data.collation import get_text_token_collater
from models.vallex import VALLE
from utils.g2p import PhonemeBpeTokenizer
from descriptions import *
from macros import *
from examples import *

import gradio as gr
from vocos import Vocos
from transformers import WhisperProcessor, WhisperForConditionalGeneration



torch._C._jit_set_profiling_executor(False)
torch._C._jit_set_profiling_mode(False)
torch._C._set_graph_executor_optimize(False)

text_tokenizer = PhonemeBpeTokenizer(tokenizer_path="./utils/g2p/bpe_69.json")
text_collater = get_text_token_collater()

device = torch.device("cpu")
if torch.cuda.is_available():
    device = torch.device("cuda", 0)

# VALL-E-X model
model = VALLE(
        N_DIM,
        NUM_HEAD,
        NUM_LAYERS,
        norm_first=True,
        add_prenet=False,
        prefix_mode=PREFIX_MODE,
        share_embedding=True,
        nar_scale_factor=1.0,
        prepend_bos=True,
        num_quantizers=NUM_QUANTIZERS,
    ).to(device)
checkpoint = torch.load("./epoch-10.pt", map_location='cpu')
missing_keys, unexpected_keys = model.load_state_dict(
    checkpoint["model"], strict=True
)
del checkpoint
assert not missing_keys
model.eval()

# Encodec model
audio_tokenizer = AudioTokenizer(device)

# Vocos decoder
vocos = Vocos.from_pretrained('charactr/vocos-encodec-24khz').to(device)

# ASR
whisper_processor = WhisperProcessor.from_pretrained("openai/whisper-medium")
whisper = WhisperForConditionalGeneration.from_pretrained("openai/whisper-medium").to(device)
whisper.config.forced_decoder_ids = None

# Voice Presets
preset_list = os.walk("./presets/").__next__()[2]
preset_list = [preset[:-4] for preset in preset_list if preset.endswith(".npz")]

def clear_prompts():
    try:
        path = tempfile.gettempdir()
        for eachfile in os.listdir(path):
            filename = os.path.join(path, eachfile)
            if os.path.isfile(filename) and filename.endswith(".npz"):
                lastmodifytime = os.stat(filename).st_mtime
                endfiletime = time.time() - 60
                if endfiletime > lastmodifytime:
                    os.remove(filename)
        del path, filename, lastmodifytime, endfiletime
        gc.collect()
    except:
        return

def transcribe_one(wav, sr):
    if sr != 16000:
        wav4trans = torchaudio.transforms.Resample(sr, 16000)(wav)
    else:
        wav4trans = wav

    input_features = whisper_processor(wav4trans.squeeze(0), sampling_rate=16000, return_tensors="pt").input_features

    # generate token ids
    predicted_ids = whisper.generate(input_features.to(device))
    lang = whisper_processor.batch_decode(predicted_ids[:, 1])[0].strip("<|>")
    # decode token ids to text
    text_pr = whisper_processor.batch_decode(predicted_ids, skip_special_tokens=True)[0]

    # print the recognized text
    print(text_pr)

    if text_pr.strip(" ")[-1] not in "?!.,。，？！。、":
        text_pr += "."

    # delete all variables
    del wav4trans, input_features, predicted_ids
    gc.collect()
    return lang, text_pr

def make_npz_prompt(name, uploaded_audio, recorded_audio, transcript_content):
    clear_prompts()
    audio_prompt = uploaded_audio if uploaded_audio is not None else recorded_audio
    sr, wav_pr = audio_prompt
    if len(wav_pr) / sr > 15:
        return "Rejected, Audio too long (should be less than 15 seconds)", None
    if not isinstance(wav_pr, torch.FloatTensor):
        wav_pr = torch.FloatTensor(wav_pr)
    if wav_pr.abs().max() > 1:
        wav_pr /= wav_pr.abs().max()
    if wav_pr.size(-1) == 2:
        wav_pr = wav_pr[:, 0]
    if wav_pr.ndim == 1:
        wav_pr = wav_pr.unsqueeze(0)
    assert wav_pr.ndim and wav_pr.size(0) == 1

    if transcript_content == "":
        lang_pr, text_pr = transcribe_one(wav_pr, sr)
        lang_token = lang2token[lang_pr]
        text_pr = lang_token + text_pr + lang_token
    else:
        lang_pr = langid.classify(str(transcript_content))[0]
        lang_token = lang2token[lang_pr]
        transcript_content = transcript_content.replace("\n", "")
        text_pr = f"{lang_token}{str(transcript_content)}{lang_token}"
    # tokenize audio
    encoded_frames = tokenize_audio(audio_tokenizer, (wav_pr, sr))
    audio_tokens = encoded_frames[0][0].transpose(2, 1).cpu().numpy()

    # tokenize text
    phonemes, _ = text_tokenizer.tokenize(text=f"{text_pr}".strip())
    text_tokens, enroll_x_lens = text_collater(
        [
            phonemes
        ]
    )

    message = f"Detected language: {lang_pr}\n Detected text {text_pr}\n"
    if lang_pr not in ['ja', 'zh', 'en']:
        return f"Prompt can only made with one of model-supported languages, got {lang_pr} instead", None

    # save as npz file
    np.savez(os.path.join(tempfile.gettempdir(), f"{name}.npz"),
             audio_tokens=audio_tokens, text_tokens=text_tokens, lang_code=lang2code[lang_pr])

    # delete all variables
    del audio_tokens, text_tokens, phonemes, lang_pr, text_pr, wav_pr, sr, uploaded_audio, recorded_audio
    gc.collect()
    return message, os.path.join(tempfile.gettempdir(), f"{name}.npz")


@torch.no_grad()
def infer_from_audio(text, language, accent, audio_prompt, record_audio_prompt, transcript_content):
    if len(text) > 150:
        return "Rejected, Text too long (should be less than 150 characters)", None
    if audio_prompt is None and record_audio_prompt is None:
        audio_prompts = torch.zeros([1, 0, NUM_QUANTIZERS]).type(torch.int32).to(device)
        text_prompts = torch.zeros([1, 0]).type(torch.int32)
        lang_pr = language if language != 'mix' else 'en'
        enroll_x_lens = 0
    else:
        audio_prompt = audio_prompt if audio_prompt is not None else record_audio_prompt
        sr, wav_pr = audio_prompt
        if len(wav_pr) / sr > 15:
            return "Rejected, Audio too long (should be less than 15 seconds)", None
        if not isinstance(wav_pr, torch.FloatTensor):
            wav_pr = torch.FloatTensor(wav_pr)
        if wav_pr.abs().max() > 1:
            wav_pr /= wav_pr.abs().max()
        if wav_pr.size(-1) == 2:
            wav_pr = wav_pr[:, 0]
        if wav_pr.ndim == 1:
            wav_pr = wav_pr.unsqueeze(0)
        assert wav_pr.ndim and wav_pr.size(0) == 1

        if transcript_content == "":
            lang_pr, text_pr = transcribe_one(wav_pr, sr)
            lang_token = lang2token[lang_pr]
            text_pr = lang_token + text_pr + lang_token
        else:
            lang_pr = langid.classify(str(transcript_content))[0]
            text_pr = transcript_content.replace("\n", "")
            if lang_pr not in ['ja', 'zh', 'en']:
                return f"Reference audio must be a speech of one of model-supported languages, got {lang_pr} instead", None
            lang_token = lang2token[lang_pr]
            text_pr = lang_token + text_pr + lang_token

        # tokenize audio
        encoded_frames = tokenize_audio(audio_tokenizer, (wav_pr, sr))
        audio_prompts = encoded_frames[0][0].transpose(2, 1).to(device)

        enroll_x_lens = None
        if text_pr:
            text_prompts, _ = text_tokenizer.tokenize(text=f"{text_pr}".strip())
            text_prompts, enroll_x_lens = text_collater(
                [
                    text_prompts
                ]
            )

    if language == 'auto-detect':
        lang_token = lang2token[langid.classify(text)[0]]
    else:
        lang_token = langdropdown2token[language]
    lang = token2lang[lang_token]
    text = text.replace("\n", "")
    text = lang_token + text + lang_token

    # tokenize text
    logging.info(f"synthesize text: {text}")
    phone_tokens, langs = text_tokenizer.tokenize(text=f"_{text}".strip())
    text_tokens, text_tokens_lens = text_collater(
        [
            phone_tokens
        ]
    )


    text_tokens = torch.cat([text_prompts, text_tokens], dim=-1)
    text_tokens_lens += enroll_x_lens
    lang = lang if accent == "no-accent" else token2lang[langdropdown2token[accent]]
    encoded_frames = model.inference(
        text_tokens.to(device),
        text_tokens_lens.to(device),
        audio_prompts,
        enroll_x_lens=enroll_x_lens,
        top_k=-100,
        temperature=1,
        prompt_language=lang_pr,
        text_language=langs if accent == "no-accent" else lang,
    )
    # Decode with Vocos
    frames = encoded_frames.permute(2,0,1)
    features = vocos.codes_to_features(frames)
    samples = vocos.decode(features, bandwidth_id=torch.tensor([2], device=device))

    message = f"text prompt: {text_pr}\nsythesized text: {text}"
    # delete all variables
    del audio_prompts, text_tokens, text_prompts, phone_tokens, encoded_frames, wav_pr, sr, audio_prompt, record_audio_prompt, transcript_content
    gc.collect()
    return message, (24000, samples.squeeze(0).cpu().numpy())

@torch.no_grad()
def infer_from_prompt(text, language, accent, preset_prompt, prompt_file):
    if len(text) > 150:
        return "Rejected, Text too long (should be less than 150 characters)", None
    clear_prompts()
    # text to synthesize
    if language == 'auto-detect':
        lang_token = lang2token[langid.classify(text)[0]]
    else:
        lang_token = langdropdown2token[language]
    lang = token2lang[lang_token]
    text = text.replace("\n", "")
    text = lang_token + text + lang_token

    # load prompt
    if prompt_file is not None:
        prompt_data = np.load(prompt_file.name)
    else:
        prompt_data = np.load(os.path.join("./presets/", f"{preset_prompt}.npz"))
    audio_prompts = prompt_data['audio_tokens']
    text_prompts = prompt_data['text_tokens']
    lang_pr = prompt_data['lang_code']
    lang_pr = code2lang[int(lang_pr)]

    # numpy to tensor
    audio_prompts = torch.tensor(audio_prompts).type(torch.int32).to(device)
    text_prompts = torch.tensor(text_prompts).type(torch.int32)

    enroll_x_lens = text_prompts.shape[-1]
    logging.info(f"synthesize text: {text}")
    phone_tokens, langs = text_tokenizer.tokenize(text=f"_{text}".strip())
    text_tokens, text_tokens_lens = text_collater(
        [
            phone_tokens
        ]
    )
    text_tokens = torch.cat([text_prompts, text_tokens], dim=-1)
    text_tokens_lens += enroll_x_lens
    # accent control
    lang = lang if accent == "no-accent" else token2lang[langdropdown2token[accent]]
    encoded_frames = model.inference(
        text_tokens.to(device),
        text_tokens_lens.to(device),
        audio_prompts,
        enroll_x_lens=enroll_x_lens,
        top_k=-100,
        temperature=1,
        prompt_language=lang_pr,
        text_language=langs if accent == "no-accent" else lang,
    )
    # Decode with Vocos
    frames = encoded_frames.permute(2,0,1)
    features = vocos.codes_to_features(frames)
    samples = vocos.decode(features, bandwidth_id=torch.tensor([2], device=device))

    message = f"sythesized text: {text}"

    # delete all variables
    del audio_prompts, text_tokens, text_prompts, phone_tokens, encoded_frames, prompt_file, preset_prompt
    gc.collect()
    return message, (24000, samples.squeeze(0).cpu().numpy())


from utils.sentence_cutter import split_text_into_sentences
@torch.no_grad()
def infer_long_text(text, preset_prompt, prompt=None, language='auto', accent='no-accent'):
    """
    For long audio generation, two modes are available.
    fixed-prompt: This mode will keep using the same prompt the user has provided, and generate audio sentence by sentence.
    sliding-window: This mode will use the last sentence as the prompt for the next sentence, but has some concern on speaker maintenance.
    """
    if len(text) > 1000:
        return "Rejected, Text too long (should be less than 1000 characters)", None
    mode = 'fixed-prompt'
    if (prompt is None or prompt == "") and preset_prompt == "":
        mode = 'sliding-window'  # If no prompt is given, use sliding-window mode
    sentences = split_text_into_sentences(text)
    # detect language
    if language == "auto-detect":
        language = langid.classify(text)[0]
    else:
        language = token2lang[langdropdown2token[language]]

    # if initial prompt is given, encode it
    if prompt is not None and prompt != "":
        # load prompt
        prompt_data = np.load(prompt.name)
        audio_prompts = prompt_data['audio_tokens']
        text_prompts = prompt_data['text_tokens']
        lang_pr = prompt_data['lang_code']
        lang_pr = code2lang[int(lang_pr)]

        # numpy to tensor
        audio_prompts = torch.tensor(audio_prompts).type(torch.int32).to(device)
        text_prompts = torch.tensor(text_prompts).type(torch.int32)
    elif preset_prompt is not None and preset_prompt != "":
        prompt_data = np.load(os.path.join("./presets/", f"{preset_prompt}.npz"))
        audio_prompts = prompt_data['audio_tokens']
        text_prompts = prompt_data['text_tokens']
        lang_pr = prompt_data['lang_code']
        lang_pr = code2lang[int(lang_pr)]

        # numpy to tensor
        audio_prompts = torch.tensor(audio_prompts).type(torch.int32).to(device)
        text_prompts = torch.tensor(text_prompts).type(torch.int32)
    else:
        audio_prompts = torch.zeros([1, 0, NUM_QUANTIZERS]).type(torch.int32).to(device)
        text_prompts = torch.zeros([1, 0]).type(torch.int32)
        lang_pr = language if language != 'mix' else 'en'
    if mode == 'fixed-prompt':
        complete_tokens = torch.zeros([1, NUM_QUANTIZERS, 0]).type(torch.LongTensor).to(device)
        for text in sentences:
            text = text.replace("\n", "").strip(" ")
            if text == "":
                continue
            lang_token = lang2token[language]
            lang = token2lang[lang_token]
            text = lang_token + text + lang_token

            enroll_x_lens = text_prompts.shape[-1]
            logging.info(f"synthesize text: {text}")
            phone_tokens, langs = text_tokenizer.tokenize(text=f"_{text}".strip())
            text_tokens, text_tokens_lens = text_collater(
                [
                    phone_tokens
                ]
            )
            text_tokens = torch.cat([text_prompts, text_tokens], dim=-1)
            text_tokens_lens += enroll_x_lens
            # accent control
            lang = lang if accent == "no-accent" else token2lang[langdropdown2token[accent]]
            encoded_frames = model.inference(
                text_tokens.to(device),
                text_tokens_lens.to(device),
                audio_prompts,
                enroll_x_lens=enroll_x_lens,
                top_k=-100,
                temperature=1,
                prompt_language=lang_pr,
                text_language=langs if accent == "no-accent" else lang,
            )
            complete_tokens = torch.cat([complete_tokens, encoded_frames.transpose(2, 1)], dim=-1)
        # Decode with Vocos
        frames = complete_tokens.permute(1, 0, 2)
        features = vocos.codes_to_features(frames)
        samples = vocos.decode(features, bandwidth_id=torch.tensor([2], device=device))

        message = f"Cut into {len(sentences)} sentences"
        return message, (24000, samples.squeeze(0).cpu().numpy())
    elif mode == "sliding-window":
        complete_tokens = torch.zeros([1, NUM_QUANTIZERS, 0]).type(torch.LongTensor).to(device)
        original_audio_prompts = audio_prompts
        original_text_prompts = text_prompts
        for text in sentences:
            text = text.replace("\n", "").strip(" ")
            if text == "":
                continue
            lang_token = lang2token[language]
            lang = token2lang[lang_token]
            text = lang_token + text + lang_token

            enroll_x_lens = text_prompts.shape[-1]
            logging.info(f"synthesize text: {text}")
            phone_tokens, langs = text_tokenizer.tokenize(text=f"_{text}".strip())
            text_tokens, text_tokens_lens = text_collater(
                [
                    phone_tokens
                ]
            )
            text_tokens = torch.cat([text_prompts, text_tokens], dim=-1)
            text_tokens_lens += enroll_x_lens
            # accent control
            lang = lang if accent == "no-accent" else token2lang[langdropdown2token[accent]]
            encoded_frames = model.inference(
                text_tokens.to(device),
                text_tokens_lens.to(device),
                audio_prompts,
                enroll_x_lens=enroll_x_lens,
                top_k=-100,
                temperature=1,
                prompt_language=lang_pr,
                text_language=langs if accent == "no-accent" else lang,
            )
            complete_tokens = torch.cat([complete_tokens, encoded_frames.transpose(2, 1)], dim=-1)
            if torch.rand(1) < 1.0:
                audio_prompts = encoded_frames[:, :, -NUM_QUANTIZERS:]
                text_prompts = text_tokens[:, enroll_x_lens:]
            else:
                audio_prompts = original_audio_prompts
                text_prompts = original_text_prompts
        # Decode with Vocos
        frames = complete_tokens.permute(1, 0, 2)
        features = vocos.codes_to_features(frames)
        samples = vocos.decode(features, bandwidth_id=torch.tensor([2], device=device))

        message = f"Cut into {len(sentences)} sentences"

        return message, (24000, samples.squeeze(0).cpu().numpy())
    else:
        raise ValueError(f"No such mode {mode}")

app = gr.Blocks()
with app:
    gr.Markdown(top_md)
    with gr.Tab("Infer from audio"):
        gr.Markdown(infer_from_audio_md)
        with gr.Row():
            with gr.Column():

                textbox = gr.TextArea(label="Text",
                                      placeholder="Type your sentence here",
                                      value="Welcome back, Master. What can I do for you today?", elem_id=f"tts-input")
                language_dropdown = gr.Dropdown(choices=['auto-detect', 'English', '中文', '日本語'], value='auto-detect', label='language')
                accent_dropdown = gr.Dropdown(choices=['no-accent', 'English', '中文', '日本語'], value='no-accent', label='accent')
                textbox_transcript = gr.TextArea(label="Transcript",
                                      placeholder="Write transcript here. (leave empty to use whisper)",
                                      value="", elem_id=f"prompt-name")
                upload_audio_prompt = gr.Audio(label='uploaded audio prompt', source='upload', interactive=True)
                record_audio_prompt = gr.Audio(label='recorded audio prompt', source='microphone', interactive=True)
            with gr.Column():
                text_output = gr.Textbox(label="Message")
                audio_output = gr.Audio(label="Output Audio", elem_id="tts-audio")
                btn = gr.Button("Generate!")
                btn.click(infer_from_audio,
                          inputs=[textbox, language_dropdown, accent_dropdown, upload_audio_prompt, record_audio_prompt, textbox_transcript],
                          outputs=[text_output, audio_output])
                textbox_mp = gr.TextArea(label="Prompt name",
                                      placeholder="Name your prompt here",
                                      value="prompt_1", elem_id=f"prompt-name")
                btn_mp = gr.Button("Make prompt!")
                prompt_output = gr.File(interactive=False)
                btn_mp.click(make_npz_prompt,
                            inputs=[textbox_mp, upload_audio_prompt, record_audio_prompt, textbox_transcript],
                            outputs=[text_output, prompt_output])
        gr.Examples(examples=infer_from_audio_examples,
                    inputs=[textbox, language_dropdown, accent_dropdown, upload_audio_prompt, record_audio_prompt, textbox_transcript],
                    outputs=[text_output, audio_output],
                    fn=infer_from_audio,
                    cache_examples=False,)
    with gr.Tab("Make prompt"):
        gr.Markdown(make_prompt_md)
        with gr.Row():
            with gr.Column():
                textbox2 = gr.TextArea(label="Prompt name",
                                      placeholder="Name your prompt here",
                                      value="prompt_1", elem_id=f"prompt-name")
                # 添加选择语言和输入台本的地方
                textbox_transcript2 = gr.TextArea(label="Transcript",
                                      placeholder="Write transcript here. (leave empty to use whisper)",
                                      value="", elem_id=f"prompt-name")
                upload_audio_prompt_2 = gr.Audio(label='uploaded audio prompt', source='upload', interactive=True)
                record_audio_prompt_2 = gr.Audio(label='recorded audio prompt', source='microphone', interactive=True)
            with gr.Column():
                text_output_2 = gr.Textbox(label="Message")
                prompt_output_2 = gr.File(interactive=False)
                btn_2 = gr.Button("Make!")
                btn_2.click(make_npz_prompt,
                          inputs=[textbox2, upload_audio_prompt_2, record_audio_prompt_2, textbox_transcript2],
                          outputs=[text_output_2, prompt_output_2])
        gr.Examples(examples=make_npz_prompt_examples,
                    inputs=[textbox2, upload_audio_prompt_2, record_audio_prompt_2, textbox_transcript2],
                    outputs=[text_output_2, prompt_output_2],
                    fn=make_npz_prompt,
                    cache_examples=False,)
    with gr.Tab("Infer from prompt"):
        gr.Markdown(infer_from_prompt_md)
        with gr.Row():
            with gr.Column():
                textbox_3 = gr.TextArea(label="Text",
                                      placeholder="Type your sentence here",
                                      value="Welcome back, Master. What can I do for you today?", elem_id=f"tts-input")
                language_dropdown_3 = gr.Dropdown(choices=['auto-detect', 'English', '中文', '日本語', 'Mix'], value='auto-detect',
                                                label='language')
                accent_dropdown_3 = gr.Dropdown(choices=['no-accent', 'English', '中文', '日本語'], value='no-accent',
                                              label='accent')
                preset_dropdown_3 = gr.Dropdown(choices=preset_list, value=None, label='Voice preset')
                prompt_file = gr.File(file_count='single', file_types=['.npz'], interactive=True)
            with gr.Column():
                text_output_3 = gr.Textbox(label="Message")
                audio_output_3 = gr.Audio(label="Output Audio", elem_id="tts-audio")
                btn_3 = gr.Button("Generate!")
                btn_3.click(infer_from_prompt,
                          inputs=[textbox_3, language_dropdown_3, accent_dropdown_3, preset_dropdown_3, prompt_file],
                          outputs=[text_output_3, audio_output_3])
        gr.Examples(examples=infer_from_prompt_examples,
                    inputs=[textbox_3, language_dropdown_3, accent_dropdown_3, preset_dropdown_3, prompt_file],
                    outputs=[text_output_3, audio_output_3],
                    fn=infer_from_prompt,
                    cache_examples=False,)
    with gr.Tab("Infer long text"):
        gr.Markdown(long_text_md)
        with gr.Row():
            with gr.Column():
                textbox_4 = gr.TextArea(label="Text",
                                      placeholder="Type your sentence here",
                                      value=long_text_example, elem_id=f"tts-input")
                language_dropdown_4 = gr.Dropdown(choices=['auto-detect', 'English', '中文', '日本語'], value='auto-detect',
                                                label='language')
                accent_dropdown_4 = gr.Dropdown(choices=['no-accent', 'English', '中文', '日本語'], value='no-accent',
                                                label='accent')
                preset_dropdown_4 = gr.Dropdown(choices=preset_list, value=None, label='Voice preset')
                prompt_file_4 = gr.File(file_count='single', file_types=['.npz'], interactive=True)
            with gr.Column():
                text_output_4 = gr.TextArea(label="Message")
                audio_output_4 = gr.Audio(label="Output Audio", elem_id="tts-audio")
                btn_4 = gr.Button("Generate!")
                btn_4.click(infer_long_text,
                          inputs=[textbox_4, preset_dropdown_4, prompt_file_4, language_dropdown_4, accent_dropdown_4],
                          outputs=[text_output_4, audio_output_4])

app.launch()