import torch
import spaces
import gradio as gr
import os
from pyannote.audio import Pipeline
from pydub import AudioSegment

# 初始化 pyannote/speaker-diarization 模型
HF_TOKEN = os.environ.get("HUGGINGFACE_READ_TOKEN")
pipeline = None
try:
    pipeline = Pipeline.from_pretrained(
        "pyannote/speaker-diarization-3.1", use_auth_token=HF_TOKEN
    )
    device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
    pipeline.to(device)
except Exception as e:
    print(f"Error initializing pipeline: {e}")
    pipeline = None

# 音频拼接函数：拼接目标音频和混合音频
def combine_audio_with_time(target_audio, mixed_audio):
    if pipeline is None:
        return "错误: 模型未初始化"

    # 加载目标说话人的样本音频
    target_audio_segment = AudioSegment.from_wav(target_audio)

    # 加载混合音频
    mixed_audio_segment = AudioSegment.from_wav(mixed_audio)

    # 记录目标说话人音频的时间点（精确到0.01秒）
    target_start_time = len(mixed_audio_segment) / 1000  # 秒为单位，精确到 0.01 秒

    # 将目标说话人的音频片段添加到混合音频的最后
    final_audio = mixed_audio_segment + target_audio_segment

    # 保存拼接后的音频并返回时间点
    final_audio.export("final_output.wav", format="wav")

    return "final_output.wav", target_start_time

# 使用 pyannote/speaker-diarization 对拼接后的音频进行说话人分离
@spaces.GPU(duration=60 * 2)  # 使用 GPU 加速，限制执行时间为 120 秒
def diarize_audio(temp_file):
    if pipeline is None:
        return "错误: 模型未初始化"
    
    try:
        diarization = pipeline(temp_file)
    except Exception as e:
        return f"处理音频时出错: {e}"

    # 返回 diarization 输出
    return str(diarization)

# 生成标签文件的函数
def generate_labels_from_diarization(diarization_output):
    labels_path = 'labels.txt'
    successful_lines = 0

    try:
        with open(labels_path, 'w') as outfile:
            lines = diarization_output.strip().split('\n')
            for line in lines:
                try:
                    parts = line.strip()[1:-1].split(' --> ')
                    start_time = parts[0].strip()
                    end_time = parts[1].split(']')[0].strip()
                    label = line.split()[-1].strip()
                    start_seconds = timestamp_to_seconds(start_time)
                    end_seconds = timestamp_to_seconds(end_time)
                    outfile.write(f"{start_seconds}\t{end_seconds}\t{label}\n")
                    successful_lines += 1
                except Exception as e:
                    print(f"处理行时出错: '{line.strip()}'. 错误: {e}")
        print(f"成功处理了 {successful_lines} 行。")
        return labels_path if successful_lines > 0 else None
    except Exception as e:
        print(f"写入文件时出错: {e}")
        return None

# 将时间戳转换为秒
def timestamp_to_seconds(timestamp):
    try:
        h, m, s = map(float, timestamp.split(':'))
        return 3600 * h + 60 * m + s
    except ValueError as e:
        print(f"转换时间戳时出错: '{timestamp}'. 错误: {e}")
        return None

# 处理音频文件并返回输出
def process_audio(target_audio, mixed_audio):
    # 进行音频拼接
    final_audio_path, target_start_time = combine_audio_with_time(target_audio, mixed_audio)
    
    # 执行说话人分离
    diarization_result = diarize_audio(final_audio_path)
    
    if diarization_result.startswith("错误"):
        return diarization_result, None, None  # 出错时返回错误信息
    else:
        # 生成标签文件
        label_file = generate_labels_from_diarization(diarization_result)
        return diarization_result, label_file, final_audio_path  # 返回说话人分离结果、标签文件和剪辑后的音频路径

# Gradio 接口
with gr.Blocks() as demo:
    gr.Markdown("""
    # 🗣️ 音频拼接与说话人分类 🗣️
    上传目标说话人音频和混合音频，拼接并进行说话人分类。结果包括说话人分离输出、标签文件和剪辑后的音频文件。
    """)

    target_audio_input = gr.Audio(type="filepath", label="上传目标说话人音频")
    mixed_audio_input = gr.Audio(type="filepath", label="上传混合音频")
    
    process_button = gr.Button("处理音频")
    
    # 输出结果
    diarization_output = gr.Textbox(label="说话人分离结果")
    label_file_link = gr.File(label="下载标签文件")
    
    # 修改为 gr.Audio 组件来返回音频
    final_audio_link = gr.Audio(label="下载剪辑后的音频", type="file")

    # 点击按钮时触发处理音频
    process_button.click(
        fn=process_audio,
        inputs=[target_audio_input, mixed_audio_input],
        outputs=[diarization_output, label_file_link, final_audio_link]
    )

demo.launch(share=False)