import io
from typing import Union
import numpy as np

from modules.Enhancer.ResembleEnhance import load_enhancer
from modules.devices import devices
from modules.synthesize_audio import synthesize_audio
from modules.hf import spaces
from modules.webui import webui_config

import torch

from modules.ssml_parser.SSMLParser import create_ssml_parser, SSMLBreak, SSMLSegment
from modules.SynthesizeSegments import SynthesizeSegments, combine_audio_segments

from modules.speaker import speaker_mgr, Speaker
from modules.data import styles_mgr

from modules.api.utils import calc_spk_style

from modules.normalization import text_normalize
from modules import refiner

from modules.utils import audio
from modules.SentenceSplitter import SentenceSplitter

from pydub import AudioSegment
import torch.profiler


def get_speakers():
    return speaker_mgr.list_speakers()


def get_styles():
    return styles_mgr.list_items()


def load_spk_info(file):
    if file is None:
        return "empty"
    try:

        spk: Speaker = Speaker.from_file(file)
        infos = spk.to_json()
        return f"""
- name: {infos.name}
- gender: {infos.gender}
- describe: {infos.describe}
    """.strip()
    except:
        return "load failed"


def segments_length_limit(
    segments: list[Union[SSMLBreak, SSMLSegment]], total_max: int
) -> list[Union[SSMLBreak, SSMLSegment]]:
    ret_segments = []
    total_len = 0
    for seg in segments:
        if isinstance(seg, SSMLBreak):
            ret_segments.append(seg)
            continue
        total_len += len(seg["text"])
        if total_len > total_max:
            break
        ret_segments.append(seg)
    return ret_segments


@torch.inference_mode()
@spaces.GPU
def apply_audio_enhance(audio_data, sr, enable_denoise, enable_enhance):
    if not enable_denoise and not enable_enhance:
        return audio_data, sr

    device = devices.device
    # NOTE: 这里很奇怪按道理得放到 device 上，但是 enhancer 做 chunk 的时候会报错...所以得 cpu()
    tensor = torch.from_numpy(audio_data).float().squeeze().cpu()
    enhancer = load_enhancer(device)

    if enable_enhance:
        lambd = 0.9 if enable_denoise else 0.1
        tensor, sr = enhancer.enhance(
            tensor, sr, tau=0.5, nfe=64, solver="rk4", lambd=lambd, device=device
        )
    elif enable_denoise:
        tensor, sr = enhancer.denoise(tensor, sr)

    audio_data = tensor.cpu().numpy()
    return audio_data, int(sr)


@torch.inference_mode()
@spaces.GPU
def synthesize_ssml(ssml: str, batch_size=4):
    try:
        batch_size = int(batch_size)
    except Exception:
        batch_size = 8

    ssml = ssml.strip()

    if ssml == "":
        return None

    parser = create_ssml_parser()
    segments = parser.parse(ssml)
    max_len = webui_config.ssml_max
    segments = segments_length_limit(segments, max_len)

    if len(segments) == 0:
        return None

    synthesize = SynthesizeSegments(batch_size=batch_size)
    audio_segments = synthesize.synthesize_segments(segments)
    combined_audio = combine_audio_segments(audio_segments)

    sr, audio_data = audio.pydub_to_np(combined_audio)

    return sr, audio_data


# @torch.inference_mode()
@spaces.GPU
def tts_generate(
    text,
    temperature=0.3,
    top_p=0.7,
    top_k=20,
    spk=-1,
    infer_seed=-1,
    use_decoder=True,
    prompt1="",
    prompt2="",
    prefix="",
    style="",
    disable_normalize=False,
    batch_size=4,
    enable_enhance=False,
    enable_denoise=False,
    spk_file=None,
):
    try:
        batch_size = int(batch_size)
    except Exception:
        batch_size = 4

    max_len = webui_config.tts_max
    text = text.strip()[0:max_len]

    if text == "":
        return None

    if style == "*auto":
        style = None

    if isinstance(top_k, float):
        top_k = int(top_k)

    params = calc_spk_style(spk=spk, style=style)
    spk = params.get("spk", spk)

    infer_seed = infer_seed or params.get("seed", infer_seed)
    temperature = temperature or params.get("temperature", temperature)
    prefix = prefix or params.get("prefix", prefix)
    prompt1 = prompt1 or params.get("prompt1", "")
    prompt2 = prompt2 or params.get("prompt2", "")

    infer_seed = np.clip(infer_seed, -1, 2**32 - 1, out=None, dtype=np.float64)
    infer_seed = int(infer_seed)

    if not disable_normalize:
        text = text_normalize(text)

    if spk_file:
        spk = Speaker.from_file(spk_file)

    sample_rate, audio_data = synthesize_audio(
        text=text,
        temperature=temperature,
        top_P=top_p,
        top_K=top_k,
        spk=spk,
        infer_seed=infer_seed,
        use_decoder=use_decoder,
        prompt1=prompt1,
        prompt2=prompt2,
        prefix=prefix,
        batch_size=batch_size,
    )

    audio_data, sample_rate = apply_audio_enhance(
        audio_data, sample_rate, enable_denoise, enable_enhance
    )
    audio_data = audio.audio_to_int16(audio_data)
    return sample_rate, audio_data


@torch.inference_mode()
@spaces.GPU
def refine_text(text: str, prompt: str):
    text = text_normalize(text)
    return refiner.refine_text(text, prompt=prompt)


@torch.inference_mode()
@spaces.GPU
def split_long_text(long_text_input):
    spliter = SentenceSplitter(webui_config.spliter_threshold)
    sentences = spliter.parse(long_text_input)
    sentences = [text_normalize(s) for s in sentences]
    data = []
    for i, text in enumerate(sentences):
        data.append([i, text, len(text)])
    return data