#!/usr/bin/env python3
"""
获取MC-MED数据集所有需要下载的文件列表
1. 读取本地主RECORDS文件获取所有子目录
2. 下载每个子目录的RECORDS文件
3. 解析并生成完整的文件列表（包含.hea和.dat后缀）
"""

import os
import subprocess
import configparser
from pathlib import Path


def load_config(config_path='config.ini'):
    """加载配置文件"""
    config = configparser.ConfigParser()
    config.read(config_path)
    return {
        'username': config.get('credentials', 'username'),
        'password': config.get('credentials', 'password'),
        'base_url': config.get('settings', 'base_url').rstrip('/'),
        'output_dir': config.get('settings', 'output_dir'),
        'main_records': config.get('settings', 'main_records')
    }


def download_sub_records(base_url, sub_dir, username, password, temp_dir='./temp_records'):
    """
    下载子目录的RECORDS文件
    sub_dir: 如 data/waveforms/000/
    返回: RECORDS文件内容的行列表，失败返回None
    """
    os.makedirs(temp_dir, exist_ok=True)
    
    # 构建URL: base_url/data/waveforms/000/RECORDS
    sub_dir = sub_dir.rstrip('/')
    records_url = f"{base_url}/{sub_dir}/RECORDS"
    
    # 本地保存路径
    local_path = os.path.join(temp_dir, sub_dir.replace('/', '_') + '_RECORDS')
    
    # 使用wget下载
    cmd = [
        'wget',
        '--user', username,
        '--password', password,
        '-q',  # 静默模式
        '-O', local_path,
        records_url
    ]
    
    try:
        result = subprocess.run(cmd, capture_output=True, text=True, timeout=60)
        if result.returncode == 0 and os.path.exists(local_path):
            with open(local_path, 'r') as f:
                lines = [line.strip() for line in f if line.strip()]
            return lines
        else:
            print(f"  [警告] 下载失败: {records_url}")
            return None
    except subprocess.TimeoutExpired:
        print(f"  [警告] 下载超时: {records_url}")
        return None
    except Exception as e:
        print(f"  [错误] {e}")
        return None


def main():
    # 加载配置
    config = load_config()
    base_url = config['base_url']
    username = config['username']
    password = config['password']
    main_records_path = config['main_records']
    
    print("=" * 60)
    print("MC-MED 文件列表获取工具")
    print("=" * 60)
    
    # 读取主RECORDS文件
    if not os.path.exists(main_records_path):
        print(f"[错误] 主RECORDS文件不存在: {main_records_path}")
        return
    
    with open(main_records_path, 'r') as f:
        sub_dirs = [line.strip() for line in f if line.strip()]
    
    print(f"[信息] 共有 {len(sub_dirs)} 个子目录需要处理")
    
    # 存储所有文件URL
    all_files = []
    failed_dirs = []
    
    # 遍历每个子目录
    for i, sub_dir in enumerate(sub_dirs):
        print(f"[{i+1}/{len(sub_dirs)}] 处理: {sub_dir}")
        
        # 下载子目录的RECORDS
        entries = download_sub_records(base_url, sub_dir, username, password)
        
        if entries is None:
            failed_dirs.append(sub_dir)
            continue
        
        # 解析条目，生成完整文件路径
        # 条目格式如: 99013000/Pleth/99013000_1
        # 需要生成: data/waveforms/000/99013000/Pleth/99013000_1.hea
        #          data/waveforms/000/99013000/Pleth/99013000_1.dat
        sub_dir_clean = sub_dir.rstrip('/')
        for entry in entries:
            entry = entry.strip()
            if not entry:
                continue
            # 添加 .hea 和 .dat 后缀
            all_files.append(f"{sub_dir_clean}/{entry}.hea")
            all_files.append(f"{sub_dir_clean}/{entry}.dat")
    
    # 保存文件列表
    file_list_path = 'file_list.txt'
    with open(file_list_path, 'w') as f:
        for file_path in all_files:
            f.write(file_path + '\n')
    
    print("=" * 60)
    print(f"[完成] 共获取 {len(all_files)} 个文件")
    print(f"[完成] 文件列表已保存到: {file_list_path}")
    
    # 保存失败的目录列表
    if failed_dirs:
        failed_path = 'failed_dirs.txt'
        with open(failed_path, 'w') as f:
            for d in failed_dirs:
                f.write(d + '\n')
        print(f"[警告] {len(failed_dirs)} 个目录获取失败，已保存到: {failed_path}")
    
    print("=" * 60)


if __name__ == '__main__':
    main()