import argparse
from concurrent.futures import ThreadPoolExecutor

import torch
import torch.multiprocessing as mp
from tqdm import tqdm

import commons
import utils
from common.log import logger
from common.stdout_wrapper import SAFE_STDOUT
from config import config
from text import cleaned_text_to_sequence, get_bert


def process_line(x):
    line, add_blank = x
    device = config.bert_gen_config.device
    if config.bert_gen_config.use_multi_device:
        rank = mp.current_process()._identity
        rank = rank[0] if len(rank) > 0 else 0
        if torch.cuda.is_available():
            gpu_id = rank % torch.cuda.device_count()
            device = torch.device(f"cuda:{gpu_id}")
        else:
            device = torch.device("cpu")
    wav_path, _, language_str, text, phones, tone, word2ph = line.strip().split("|")
    phone = phones.split(" ")
    tone = [int(i) for i in tone.split(" ")]
    word2ph = [int(i) for i in word2ph.split(" ")]
    word2ph = [i for i in word2ph]
    phone, tone, language = cleaned_text_to_sequence(phone, tone, language_str)

    if add_blank:
        phone = commons.intersperse(phone, 0)
        tone = commons.intersperse(tone, 0)
        language = commons.intersperse(language, 0)
        for i in range(len(word2ph)):
            word2ph[i] = word2ph[i] * 2
        word2ph[0] += 1

    bert_path = wav_path.replace(".WAV", ".wav").replace(".wav", ".bert.pt")

    try:
        bert = torch.load(bert_path)
        assert bert.shape[-1] == len(phone)
    except Exception:
        bert = get_bert(text, word2ph, language_str, device)
        assert bert.shape[-1] == len(phone)
        torch.save(bert, bert_path)


preprocess_text_config = config.preprocess_text_config

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "-c", "--config", type=str, default=config.bert_gen_config.config_path
    )
    parser.add_argument(
        "--num_processes", type=int, default=config.bert_gen_config.num_processes
    )
    args, _ = parser.parse_known_args()
    config_path = args.config
    hps = utils.get_hparams_from_file(config_path)
    lines = []
    with open(hps.data.training_files, encoding="utf-8") as f:
        lines.extend(f.readlines())

    with open(hps.data.validation_files, encoding="utf-8") as f:
        lines.extend(f.readlines())
    add_blank = [hps.data.add_blank] * len(lines)

    if len(lines) != 0:
        num_processes = args.num_processes
        with ThreadPoolExecutor(max_workers=num_processes) as executor:
            _ = list(
                tqdm(
                    executor.map(process_line, zip(lines, add_blank)),
                    total=len(lines),
                    file=SAFE_STDOUT,
                )
            )

    logger.info(f"bert.pt is generated! total: {len(lines)} bert.pt files.")