import gc
import json
import os
import platform
import queue
import random
import re
import shutil
import signal
import subprocess
import sys
import tempfile
import threading
import time
from glob import glob
from importlib.resources import files

import click
import gradio as gr
import librosa
import numpy as np
import psutil
import torch
import torchaudio
from cached_path import cached_path
from datasets import Dataset as Dataset_
from datasets.arrow_writer import ArrowWriter
from safetensors.torch import load_file, save_file
from scipy.io import wavfile

from f5_tts.api import F5TTS
from f5_tts.infer.utils_infer import transcribe
from f5_tts.model.utils import convert_char_to_pinyin


training_process = None
system = platform.system()
python_executable = sys.executable or "python"
tts_api = None
last_checkpoint = ""
last_device = ""
last_ema = None


path_data = str(files("f5_tts").joinpath("../../data"))
path_project_ckpts = str(files("f5_tts").joinpath("../../ckpts"))
file_train = str(files("f5_tts").joinpath("train/finetune_cli.py"))

device = (
    "cuda"
    if torch.cuda.is_available()
    else "xpu"
    if torch.xpu.is_available()
    else "mps"
    if torch.backends.mps.is_available()
    else "cpu"
)


# Save settings from a JSON file
def save_settings(
    project_name,
    exp_name,
    learning_rate,
    batch_size_per_gpu,
    batch_size_type,
    max_samples,
    grad_accumulation_steps,
    max_grad_norm,
    epochs,
    num_warmup_updates,
    save_per_updates,
    keep_last_n_checkpoints,
    last_per_updates,
    finetune,
    file_checkpoint_train,
    tokenizer_type,
    tokenizer_file,
    mixed_precision,
    logger,
    ch_8bit_adam,
):
    path_project = os.path.join(path_project_ckpts, project_name)
    os.makedirs(path_project, exist_ok=True)
    file_setting = os.path.join(path_project, "setting.json")

    settings = {
        "exp_name": exp_name,
        "learning_rate": learning_rate,
        "batch_size_per_gpu": batch_size_per_gpu,
        "batch_size_type": batch_size_type,
        "max_samples": max_samples,
        "grad_accumulation_steps": grad_accumulation_steps,
        "max_grad_norm": max_grad_norm,
        "epochs": epochs,
        "num_warmup_updates": num_warmup_updates,
        "save_per_updates": save_per_updates,
        "keep_last_n_checkpoints": keep_last_n_checkpoints,
        "last_per_updates": last_per_updates,
        "finetune": finetune,
        "file_checkpoint_train": file_checkpoint_train,
        "tokenizer_type": tokenizer_type,
        "tokenizer_file": tokenizer_file,
        "mixed_precision": mixed_precision,
        "logger": logger,
        "bnb_optimizer": ch_8bit_adam,
    }
    with open(file_setting, "w") as f:
        json.dump(settings, f, indent=4)
    return "Settings saved!"


# Load settings from a JSON file
def load_settings(project_name):
    project_name = project_name.replace("_pinyin", "").replace("_char", "")
    path_project = os.path.join(path_project_ckpts, project_name)
    file_setting = os.path.join(path_project, "setting.json")

    # Default settings
    default_settings = {
        "exp_name": "F5TTS_v1_Base",
        "learning_rate": 1e-5,
        "batch_size_per_gpu": 3200,
        "batch_size_type": "frame",
        "max_samples": 64,
        "grad_accumulation_steps": 1,
        "max_grad_norm": 1.0,
        "epochs": 100,
        "num_warmup_updates": 100,
        "save_per_updates": 500,
        "keep_last_n_checkpoints": -1,
        "last_per_updates": 100,
        "finetune": True,
        "file_checkpoint_train": "",
        "tokenizer_type": "pinyin",
        "tokenizer_file": "",
        "mixed_precision": "fp16",
        "logger": "none",
        "bnb_optimizer": False,
    }
    if device == "mps":
        default_settings["mixed_precision"] = "none"

    # Load settings from file if it exists
    if os.path.isfile(file_setting):
        with open(file_setting, "r") as f:
            file_settings = json.load(f)
        default_settings.update(file_settings)

    # Return as a tuple in the correct order
    return (
        default_settings["exp_name"],
        default_settings["learning_rate"],
        default_settings["batch_size_per_gpu"],
        default_settings["batch_size_type"],
        default_settings["max_samples"],
        default_settings["grad_accumulation_steps"],
        default_settings["max_grad_norm"],
        default_settings["epochs"],
        default_settings["num_warmup_updates"],
        default_settings["save_per_updates"],
        default_settings["keep_last_n_checkpoints"],
        default_settings["last_per_updates"],
        default_settings["finetune"],
        default_settings["file_checkpoint_train"],
        default_settings["tokenizer_type"],
        default_settings["tokenizer_file"],
        default_settings["mixed_precision"],
        default_settings["logger"],
        default_settings["bnb_optimizer"],
    )


# Load metadata
def get_audio_duration(audio_path):
    """Calculate the duration mono of an audio file."""
    audio, sample_rate = torchaudio.load(audio_path)
    return audio.shape[1] / sample_rate


class Slicer:  # https://github.com/RVC-Boss/GPT-SoVITS/blob/main/tools/slicer2.py
    def __init__(
        self,
        sr: int,
        threshold: float = -40.0,
        min_length: int = 20000,  # 20 seconds
        min_interval: int = 300,
        hop_size: int = 20,
        max_sil_kept: int = 2000,
    ):
        if not min_length >= min_interval >= hop_size:
            raise ValueError("The following condition must be satisfied: min_length >= min_interval >= hop_size")
        if not max_sil_kept >= hop_size:
            raise ValueError("The following condition must be satisfied: max_sil_kept >= hop_size")
        min_interval = sr * min_interval / 1000
        self.threshold = 10 ** (threshold / 20.0)
        self.hop_size = round(sr * hop_size / 1000)
        self.win_size = min(round(min_interval), 4 * self.hop_size)
        self.min_length = round(sr * min_length / 1000 / self.hop_size)
        self.min_interval = round(min_interval / self.hop_size)
        self.max_sil_kept = round(sr * max_sil_kept / 1000 / self.hop_size)

    def _apply_slice(self, waveform, begin, end):
        if len(waveform.shape) > 1:
            return waveform[:, begin * self.hop_size : min(waveform.shape[1], end * self.hop_size)]
        else:
            return waveform[begin * self.hop_size : min(waveform.shape[0], end * self.hop_size)]

    # @timeit
    def slice(self, waveform):
        if len(waveform.shape) > 1:
            samples = waveform.mean(axis=0)
        else:
            samples = waveform
        if samples.shape[0] <= self.min_length:
            return [waveform]
        rms_list = librosa.feature.rms(y=samples, frame_length=self.win_size, hop_length=self.hop_size).squeeze(0)
        sil_tags = []
        silence_start = None
        clip_start = 0
        for i, rms in enumerate(rms_list):
            # Keep looping while frame is silent.
            if rms < self.threshold:
                # Record start of silent frames.
                if silence_start is None:
                    silence_start = i
                continue
            # Keep looping while frame is not silent and silence start has not been recorded.
            if silence_start is None:
                continue
            # Clear recorded silence start if interval is not enough or clip is too short
            is_leading_silence = silence_start == 0 and i > self.max_sil_kept
            need_slice_middle = i - silence_start >= self.min_interval and i - clip_start >= self.min_length
            if not is_leading_silence and not need_slice_middle:
                silence_start = None
                continue
            # Need slicing. Record the range of silent frames to be removed.
            if i - silence_start <= self.max_sil_kept:
                pos = rms_list[silence_start : i + 1].argmin() + silence_start
                if silence_start == 0:
                    sil_tags.append((0, pos))
                else:
                    sil_tags.append((pos, pos))
                clip_start = pos
            elif i - silence_start <= self.max_sil_kept * 2:
                pos = rms_list[i - self.max_sil_kept : silence_start + self.max_sil_kept + 1].argmin()
                pos += i - self.max_sil_kept
                pos_l = rms_list[silence_start : silence_start + self.max_sil_kept + 1].argmin() + silence_start
                pos_r = rms_list[i - self.max_sil_kept : i + 1].argmin() + i - self.max_sil_kept
                if silence_start == 0:
                    sil_tags.append((0, pos_r))
                    clip_start = pos_r
                else:
                    sil_tags.append((min(pos_l, pos), max(pos_r, pos)))
                    clip_start = max(pos_r, pos)
            else:
                pos_l = rms_list[silence_start : silence_start + self.max_sil_kept + 1].argmin() + silence_start
                pos_r = rms_list[i - self.max_sil_kept : i + 1].argmin() + i - self.max_sil_kept
                if silence_start == 0:
                    sil_tags.append((0, pos_r))
                else:
                    sil_tags.append((pos_l, pos_r))
                clip_start = pos_r
            silence_start = None
        # Deal with trailing silence.
        total_frames = rms_list.shape[0]
        if silence_start is not None and total_frames - silence_start >= self.min_interval:
            silence_end = min(total_frames, silence_start + self.max_sil_kept)
            pos = rms_list[silence_start : silence_end + 1].argmin() + silence_start
            sil_tags.append((pos, total_frames + 1))
        # Apply and return slices: [chunk, start, end]
        if len(sil_tags) == 0:
            return [[waveform, 0, int(total_frames * self.hop_size)]]
        else:
            chunks = []
            if sil_tags[0][0] > 0:
                chunks.append([self._apply_slice(waveform, 0, sil_tags[0][0]), 0, int(sil_tags[0][0] * self.hop_size)])
            for i in range(len(sil_tags) - 1):
                chunks.append(
                    [
                        self._apply_slice(waveform, sil_tags[i][1], sil_tags[i + 1][0]),
                        int(sil_tags[i][1] * self.hop_size),
                        int(sil_tags[i + 1][0] * self.hop_size),
                    ]
                )
            if sil_tags[-1][1] < total_frames:
                chunks.append(
                    [
                        self._apply_slice(waveform, sil_tags[-1][1], total_frames),
                        int(sil_tags[-1][1] * self.hop_size),
                        int(total_frames * self.hop_size),
                    ]
                )
            return chunks


# terminal
def terminate_process_tree(pid, including_parent=True):
    try:
        parent = psutil.Process(pid)
    except psutil.NoSuchProcess:
        # Process already terminated
        return

    children = parent.children(recursive=True)
    for child in children:
        try:
            os.kill(child.pid, signal.SIGTERM)  # or signal.SIGKILL
        except OSError:
            pass
    if including_parent:
        try:
            os.kill(parent.pid, signal.SIGTERM)  # or signal.SIGKILL
        except OSError:
            pass


def terminate_process(pid):
    if system == "Windows":
        cmd = f"taskkill /t /f /pid {pid}"
        os.system(cmd)
    else:
        terminate_process_tree(pid)


def start_training(
    dataset_name,
    exp_name,
    learning_rate,
    batch_size_per_gpu,
    batch_size_type,
    max_samples,
    grad_accumulation_steps,
    max_grad_norm,
    epochs,
    num_warmup_updates,
    save_per_updates,
    keep_last_n_checkpoints,
    last_per_updates,
    finetune,
    file_checkpoint_train,
    tokenizer_type,
    tokenizer_file,
    mixed_precision,
    stream,
    logger,
    ch_8bit_adam,
):
    global training_process, tts_api, stop_signal

    if tts_api is not None:
        if tts_api is not None:
            del tts_api

        gc.collect()
        torch.cuda.empty_cache()
        tts_api = None

    path_project = os.path.join(path_data, dataset_name)

    if not os.path.isdir(path_project):
        yield (
            f"There is not project with name {dataset_name}",
            gr.update(interactive=True),
            gr.update(interactive=False),
        )
        return

    file_raw = os.path.join(path_project, "raw.arrow")
    if not os.path.isfile(file_raw):
        yield f"There is no file {file_raw}", gr.update(interactive=True), gr.update(interactive=False)
        return

    # Check if a training process is already running
    if training_process is not None:
        return "Train run already!", gr.update(interactive=False), gr.update(interactive=True)

    yield "start train", gr.update(interactive=False), gr.update(interactive=False)

    # Command to run the training script with the specified arguments

    if tokenizer_file == "":
        if dataset_name.endswith("_pinyin"):
            tokenizer_type = "pinyin"
        elif dataset_name.endswith("_char"):
            tokenizer_type = "char"
    else:
        tokenizer_type = "custom"

    dataset_name = dataset_name.replace("_pinyin", "").replace("_char", "")

    if mixed_precision != "none":
        fp16 = f"--mixed_precision={mixed_precision}"
    else:
        fp16 = ""

    cmd = (
        f'accelerate launch {fp16} "{file_train}" --exp_name {exp_name}'
        f" --learning_rate {learning_rate}"
        f" --batch_size_per_gpu {batch_size_per_gpu}"
        f" --batch_size_type {batch_size_type}"
        f" --max_samples {max_samples}"
        f" --grad_accumulation_steps {grad_accumulation_steps}"
        f" --max_grad_norm {max_grad_norm}"
        f" --epochs {epochs}"
        f" --num_warmup_updates {num_warmup_updates}"
        f" --save_per_updates {save_per_updates}"
        f" --keep_last_n_checkpoints {keep_last_n_checkpoints}"
        f" --last_per_updates {last_per_updates}"
        f" --dataset_name {dataset_name}"
    )

    if finetune:
        cmd += " --finetune"

    if file_checkpoint_train != "":
        cmd += f' --pretrain "{file_checkpoint_train}"'

    if tokenizer_file != "":
        cmd += f" --tokenizer_path {tokenizer_file}"

    cmd += f" --tokenizer {tokenizer_type}"

    if logger != "none":
        cmd += f" --logger {logger}"

    cmd += " --log_samples"

    if ch_8bit_adam:
        cmd += " --bnb_optimizer"

    print("run command : \n" + cmd + "\n")

    save_settings(
        dataset_name,
        exp_name,
        learning_rate,
        batch_size_per_gpu,
        batch_size_type,
        max_samples,
        grad_accumulation_steps,
        max_grad_norm,
        epochs,
        num_warmup_updates,
        save_per_updates,
        keep_last_n_checkpoints,
        last_per_updates,
        finetune,
        file_checkpoint_train,
        tokenizer_type,
        tokenizer_file,
        mixed_precision,
        logger,
        ch_8bit_adam,
    )

    try:
        if not stream:
            # Start the training process
            training_process = subprocess.Popen(cmd, shell=True)

            time.sleep(5)
            yield "train start", gr.update(interactive=False), gr.update(interactive=True)

            # Wait for the training process to finish
            training_process.wait()
        else:

            def stream_output(pipe, output_queue):
                try:
                    for line in iter(pipe.readline, ""):
                        output_queue.put(line)
                except Exception as e:
                    output_queue.put(f"Error reading pipe: {str(e)}")
                finally:
                    pipe.close()

            env = os.environ.copy()
            env["PYTHONUNBUFFERED"] = "1"

            training_process = subprocess.Popen(
                cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True, bufsize=1, env=env
            )
            yield "Training started ...", gr.update(interactive=False), gr.update(interactive=True)

            stdout_queue = queue.Queue()
            stderr_queue = queue.Queue()

            stdout_thread = threading.Thread(target=stream_output, args=(training_process.stdout, stdout_queue))
            stderr_thread = threading.Thread(target=stream_output, args=(training_process.stderr, stderr_queue))
            stdout_thread.daemon = True
            stderr_thread.daemon = True
            stdout_thread.start()
            stderr_thread.start()
            stop_signal = False
            while True:
                if stop_signal:
                    training_process.terminate()
                    time.sleep(0.5)
                    if training_process.poll() is None:
                        training_process.kill()
                    yield "Training stopped by user.", gr.update(interactive=True), gr.update(interactive=False)
                    break

                process_status = training_process.poll()

                # Handle stdout
                try:
                    while True:
                        output = stdout_queue.get_nowait()
                        print(output, end="")
                        match = re.search(
                            r"Epoch (\d+)/(\d+):\s+(\d+)%\|.*\[(\d+:\d+)<.*?loss=(\d+\.\d+), update=(\d+)", output
                        )
                        if match:
                            current_epoch = match.group(1)
                            total_epochs = match.group(2)
                            percent_complete = match.group(3)
                            elapsed_time = match.group(4)
                            loss = match.group(5)
                            current_update = match.group(6)
                            message = (
                                f"Epoch: {current_epoch}/{total_epochs}, "
                                f"Progress: {percent_complete}%, "
                                f"Elapsed Time: {elapsed_time}, "
                                f"Loss: {loss}, "
                                f"Update: {current_update}"
                            )
                            yield message, gr.update(interactive=False), gr.update(interactive=True)
                        elif output.strip():
                            yield output, gr.update(interactive=False), gr.update(interactive=True)
                except queue.Empty:
                    pass

                # Handle stderr
                try:
                    while True:
                        error_output = stderr_queue.get_nowait()
                        print(error_output, end="")
                        if error_output.strip():
                            yield f"{error_output.strip()}", gr.update(interactive=False), gr.update(interactive=True)
                except queue.Empty:
                    pass

                if process_status is not None and stdout_queue.empty() and stderr_queue.empty():
                    if process_status != 0:
                        yield (
                            f"Process crashed with exit code {process_status}!",
                            gr.update(interactive=False),
                            gr.update(interactive=True),
                        )
                    else:
                        yield (
                            "Training complete or paused ...",
                            gr.update(interactive=False),
                            gr.update(interactive=True),
                        )
                    break

                # Small sleep to prevent CPU thrashing
                time.sleep(0.1)

            # Clean up
            training_process.stdout.close()
            training_process.stderr.close()
            training_process.wait()

        time.sleep(1)

        if training_process is None:
            text_info = "Train stopped !"
        else:
            text_info = "Train complete at end !"

    except Exception as e:  # Catch all exceptions
        # Ensure that we reset the training process variable in case of an error
        text_info = f"An error occurred: {str(e)}"

    training_process = None

    yield text_info, gr.update(interactive=True), gr.update(interactive=False)


def stop_training():
    global training_process, stop_signal

    if training_process is None:
        return "Train not running !", gr.update(interactive=True), gr.update(interactive=False)
    terminate_process_tree(training_process.pid)
    # training_process = None
    stop_signal = True
    return "Train stopped !", gr.update(interactive=True), gr.update(interactive=False)


def get_list_projects():
    project_list = []
    for folder in os.listdir(path_data):
        path_folder = os.path.join(path_data, folder)
        if not os.path.isdir(path_folder):
            continue
        folder = folder.lower()
        if folder == "emilia_zh_en_pinyin":
            continue
        project_list.append(folder)

    projects_selelect = None if not project_list else project_list[-1]

    return project_list, projects_selelect


def create_data_project(name, tokenizer_type):
    name += "_" + tokenizer_type
    os.makedirs(os.path.join(path_data, name), exist_ok=True)
    os.makedirs(os.path.join(path_data, name, "dataset"), exist_ok=True)
    project_list, projects_selelect = get_list_projects()
    return gr.update(choices=project_list, value=name)


def transcribe_all(name_project, audio_files, language, user=False, progress=gr.Progress()):
    path_project = os.path.join(path_data, name_project)
    path_dataset = os.path.join(path_project, "dataset")
    path_project_wavs = os.path.join(path_project, "wavs")
    file_metadata = os.path.join(path_project, "metadata.csv")

    if not user:
        if audio_files is None:
            return "You need to load an audio file."

    if os.path.isdir(path_project_wavs):
        shutil.rmtree(path_project_wavs)

    if os.path.isfile(file_metadata):
        os.remove(file_metadata)

    os.makedirs(path_project_wavs, exist_ok=True)

    if user:
        file_audios = [
            file
            for format in ("*.wav", "*.ogg", "*.opus", "*.mp3", "*.flac")
            for file in glob(os.path.join(path_dataset, format))
        ]
        if file_audios == []:
            return "No audio file was found in the dataset."
    else:
        file_audios = audio_files

    alpha = 0.5
    _max = 1.0
    slicer = Slicer(24000)

    num = 0
    error_num = 0
    data = ""
    for file_audio in progress.tqdm(file_audios, desc="transcribe files", total=len((file_audios))):
        audio, _ = librosa.load(file_audio, sr=24000, mono=True)

        list_slicer = slicer.slice(audio)
        for chunk, start, end in progress.tqdm(list_slicer, total=len(list_slicer), desc="slicer files"):
            name_segment = os.path.join(f"segment_{num}")
            file_segment = os.path.join(path_project_wavs, f"{name_segment}.wav")

            tmp_max = np.abs(chunk).max()
            if tmp_max > 1:
                chunk /= tmp_max
            chunk = (chunk / tmp_max * (_max * alpha)) + (1 - alpha) * chunk
            wavfile.write(file_segment, 24000, (chunk * 32767).astype(np.int16))

            try:
                text = transcribe(file_segment, language)
                text = text.strip()

                data += f"{name_segment}|{text}\n"

                num += 1
            except:  # noqa: E722
                error_num += 1

    with open(file_metadata, "w", encoding="utf-8-sig") as f:
        f.write(data)

    if error_num != []:
        error_text = f"\nerror files : {error_num}"
    else:
        error_text = ""

    return f"transcribe complete samples : {num}\npath : {path_project_wavs}{error_text}"


def format_seconds_to_hms(seconds):
    hours = int(seconds / 3600)
    minutes = int((seconds % 3600) / 60)
    seconds = seconds % 60
    return "{:02d}:{:02d}:{:02d}".format(hours, minutes, int(seconds))


def get_correct_audio_path(
    audio_input,
    base_path="wavs",
    supported_formats=("wav", "mp3", "aac", "flac", "m4a", "alac", "ogg", "aiff", "wma", "amr"),
):
    file_audio = None

    # Helper function to check if file has a supported extension
    def has_supported_extension(file_name):
        return any(file_name.endswith(f".{ext}") for ext in supported_formats)

    # Case 1: If it's a full path with a valid extension, use it directly
    if os.path.isabs(audio_input) and has_supported_extension(audio_input):
        file_audio = audio_input

    # Case 2: If it has a supported extension but is not a full path
    elif has_supported_extension(audio_input) and not os.path.isabs(audio_input):
        file_audio = os.path.join(base_path, audio_input)

    # Case 3: If only the name is given (no extension and not a full path)
    elif not has_supported_extension(audio_input) and not os.path.isabs(audio_input):
        for ext in supported_formats:
            potential_file = os.path.join(base_path, f"{audio_input}.{ext}")
            if os.path.exists(potential_file):
                file_audio = potential_file
                break
        else:
            file_audio = os.path.join(base_path, f"{audio_input}.{supported_formats[0]}")
    return file_audio


def create_metadata(name_project, ch_tokenizer, progress=gr.Progress()):
    path_project = os.path.join(path_data, name_project)
    path_project_wavs = os.path.join(path_project, "wavs")
    file_metadata = os.path.join(path_project, "metadata.csv")
    file_raw = os.path.join(path_project, "raw.arrow")
    file_duration = os.path.join(path_project, "duration.json")
    file_vocab = os.path.join(path_project, "vocab.txt")

    if not os.path.isfile(file_metadata):
        return "The file was not found in " + file_metadata, ""

    with open(file_metadata, "r", encoding="utf-8-sig") as f:
        data = f.read()

    audio_path_list = []
    text_list = []
    duration_list = []

    count = data.split("\n")
    lenght = 0
    result = []
    error_files = []
    text_vocab_set = set()
    for line in progress.tqdm(data.split("\n"), total=count):
        sp_line = line.split("|")
        if len(sp_line) != 2:
            continue
        name_audio, text = sp_line[:2]

        file_audio = get_correct_audio_path(name_audio, path_project_wavs)

        if not os.path.isfile(file_audio):
            error_files.append([file_audio, "error path"])
            continue

        try:
            duration = get_audio_duration(file_audio)
        except Exception as e:
            error_files.append([file_audio, "duration"])
            print(f"Error processing {file_audio}: {e}")
            continue

        if duration < 1 or duration > 30:
            if duration > 30:
                error_files.append([file_audio, "duration > 30 sec"])
            if duration < 1:
                error_files.append([file_audio, "duration < 1 sec "])
            continue
        if len(text) < 3:
            error_files.append([file_audio, "very short text length 3"])
            continue

        text = text.strip()
        text = convert_char_to_pinyin([text], polyphone=True)[0]

        audio_path_list.append(file_audio)
        duration_list.append(duration)
        text_list.append(text)

        result.append({"audio_path": file_audio, "text": text, "duration": duration})
        if ch_tokenizer:
            text_vocab_set.update(list(text))

        lenght += duration

    if duration_list == []:
        return f"Error: No audio files found in the specified path : {path_project_wavs}", ""

    min_second = round(min(duration_list), 2)
    max_second = round(max(duration_list), 2)

    with ArrowWriter(path=file_raw) as writer:
        for line in progress.tqdm(result, total=len(result), desc="prepare data"):
            writer.write(line)
        writer.finalize()

    with open(file_duration, "w") as f:
        json.dump({"duration": duration_list}, f, ensure_ascii=False)

    new_vocal = ""
    if not ch_tokenizer:
        if not os.path.isfile(file_vocab):
            file_vocab_finetune = os.path.join(path_data, "Emilia_ZH_EN_pinyin/vocab.txt")
            if not os.path.isfile(file_vocab_finetune):
                return "Error: Vocabulary file 'Emilia_ZH_EN_pinyin' not found!", ""
            shutil.copy2(file_vocab_finetune, file_vocab)

        with open(file_vocab, "r", encoding="utf-8-sig") as f:
            vocab_char_map = {}
            for i, char in enumerate(f):
                vocab_char_map[char[:-1]] = i
        vocab_size = len(vocab_char_map)

    else:
        with open(file_vocab, "w", encoding="utf-8-sig") as f:
            for vocab in sorted(text_vocab_set):
                f.write(vocab + "\n")
                new_vocal += vocab + "\n"
        vocab_size = len(text_vocab_set)

    if error_files != []:
        error_text = "\n".join([" = ".join(item) for item in error_files])
    else:
        error_text = ""

    return (
        f"prepare complete \nsamples : {len(text_list)}\ntime data : {format_seconds_to_hms(lenght)}\nmin sec : {min_second}\nmax sec : {max_second}\nfile_arrow : {file_raw}\nvocab : {vocab_size}\n{error_text}",
        new_vocal,
    )


def check_user(value):
    return gr.update(visible=not value), gr.update(visible=value)


def calculate_train(
    name_project,
    epochs,
    learning_rate,
    batch_size_per_gpu,
    batch_size_type,
    max_samples,
    num_warmup_updates,
    finetune,
):
    path_project = os.path.join(path_data, name_project)
    file_duration = os.path.join(path_project, "duration.json")

    hop_length = 256
    sampling_rate = 24000

    if not os.path.isfile(file_duration):
        return (
            epochs,
            learning_rate,
            batch_size_per_gpu,
            max_samples,
            num_warmup_updates,
            "project not found !",
        )

    with open(file_duration, "r") as file:
        data = json.load(file)

    duration_list = data["duration"]
    max_sample_length = max(duration_list) * sampling_rate / hop_length
    total_samples = len(duration_list)
    total_duration = sum(duration_list)

    if torch.cuda.is_available():
        gpu_count = torch.cuda.device_count()
        total_memory = 0
        for i in range(gpu_count):
            gpu_properties = torch.cuda.get_device_properties(i)
            total_memory += gpu_properties.total_memory / (1024**3)  # in GB
    elif torch.xpu.is_available():
        gpu_count = torch.xpu.device_count()
        total_memory = 0
        for i in range(gpu_count):
            gpu_properties = torch.xpu.get_device_properties(i)
            total_memory += gpu_properties.total_memory / (1024**3)
    elif torch.backends.mps.is_available():
        gpu_count = 1
        total_memory = psutil.virtual_memory().available / (1024**3)

    avg_gpu_memory = total_memory / gpu_count

    # rough estimate of batch size
    if batch_size_type == "frame":
        batch_size_per_gpu = max(int(38400 * (avg_gpu_memory - 5) / 75), int(max_sample_length))
    elif batch_size_type == "sample":
        batch_size_per_gpu = int(200 / (total_duration / total_samples))

    if total_samples < 64:
        max_samples = int(total_samples * 0.25)

    num_warmup_updates = max(num_warmup_updates, int(total_samples * 0.05))

    # take 1.2M updates as the maximum
    max_updates = 1200000

    if batch_size_type == "frame":
        mini_batch_duration = batch_size_per_gpu * gpu_count * hop_length / sampling_rate
        updates_per_epoch = total_duration / mini_batch_duration
    elif batch_size_type == "sample":
        updates_per_epoch = total_samples / batch_size_per_gpu / gpu_count

    epochs = int(max_updates / updates_per_epoch)

    if finetune:
        learning_rate = 1e-5
    else:
        learning_rate = 7.5e-5

    return (
        epochs,
        learning_rate,
        batch_size_per_gpu,
        max_samples,
        num_warmup_updates,
        total_samples,
    )


def prune_checkpoint(checkpoint_path: str, new_checkpoint_path: str, save_ema: bool, safetensors: bool) -> str:
    try:
        checkpoint = torch.load(checkpoint_path, weights_only=True)
        print("Original Checkpoint Keys:", checkpoint.keys())

        to_retain = "ema_model_state_dict" if save_ema else "model_state_dict"
        try:
            model_state_dict_to_retain = checkpoint[to_retain]
        except KeyError:
            return f"{to_retain} not found in the checkpoint."

        if safetensors:
            new_checkpoint_path = new_checkpoint_path.replace(".pt", ".safetensors")
            save_file(model_state_dict_to_retain, new_checkpoint_path)
        else:
