import json
import os
from datetime import datetime

def filter_by_duration(input_file, output_file, min_duration=30, max_duration=90):
    """
    过滤JSON文件，只保留total_duration在[min_duration, max_duration]范围内的条目
    并记录被删除的文件信息到日志文件
    
    :param input_file: 输入JSON文件路径
    :param output_file: 输出JSON文件路径
    :param min_duration: 最小持续时间（秒）
    :param max_duration: 最大持续时间（秒）
    """
    # 创建日志目录
    log_dir = os.path.join(os.path.dirname(output_file), "filter_logs")
    if not os.path.exists(log_dir):
        os.makedirs(log_dir)
    
    # 创建日志文件（以当前时间命名）
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    log_file = os.path.join(log_dir, f"removed_entries_{timestamp}.log")
    
    # 加载原始JSON文件
    with open(input_file, 'r', encoding='utf-8') as f:
        data = json.load(f)
    
    # 初始化过滤结果和删除列表
    filtered_data = {}
    removed_entries = []
    
    # 过滤数据并记录被删除的条目
    for key, value in data.items():
        if 'total_duration' in value and min_duration <= value['total_duration'] <= max_duration:
            filtered_data[key] = value
        else:
            duration = value.get('total_duration', 'N/A')
            removed_entries.append({
                'key': key,
                'duration': duration,
                'original_dialog_id': value.get('original_dialog_id', 'N/A'),
                'reason': 'too_short' if isinstance(duration, (int, float)) and duration < min_duration 
                         else 'too_long' if isinstance(duration, (int, float)) and duration > max_duration 
                         else 'missing_or_invalid'
            })
    
    # 保存过滤后的结果
    with open(output_file, 'w', encoding='utf-8') as f:
        json.dump(filtered_data, f, indent=2, ensure_ascii=False)
    
    # 保存删除日志
    with open(log_file, 'w', encoding='utf-8') as f:
        f.write(f"Filtering log - {timestamp}\n")
        f.write(f"Input file: {input_file}\n")
        f.write(f"Output file: {output_file}\n")
        f.write(f"Duration range: {min_duration}s to {max_duration}s\n\n")
        f.write("Removed Entries:\n")
        f.write("="*50 + "\n")
        for entry in removed_entries:
            f.write(f"Key: {entry['key']}\n")
            f.write(f"Original Dialog ID: {entry['original_dialog_id']}\n")
            f.write(f"Duration: {entry['duration']}s\n")
            f.write(f"Reason: {entry['reason']}\n")
            f.write("-"*50 + "\n")
    
    print(f"\n处理结果: {os.path.basename(input_file)}")
    print(f"原始条目数: {len(data)}")
    print(f"过滤后条目数: {len(filtered_data)}")
    print(f"已删除 {len(removed_entries)} 个不符合时长要求的条目")
    print(f"过滤后的数据已保存到: {output_file}")
    print(f"删除条目日志已保存到: {log_file}")

def process_directory(input_dir, output_dir, min_duration=30, max_duration=90):
    """
    处理目录中的所有JSON文件
    """
    if not os.path.exists(output_dir):
        os.makedirs(output_dir)
    
    # 创建总日志文件
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    summary_log = os.path.join(output_dir, f"summary_removed_entries_{timestamp}.log")
    
    total_removed = 0
    total_processed = 0
    
    with open(summary_log, 'w', encoding='utf-8') as summary_f:
        summary_f.write(f"Summary Filtering Log - {timestamp}\n")
        summary_f.write(f"Input directory: {input_dir}\n")
        summary_f.write(f"Output directory: {output_dir}\n")
        summary_f.write(f"Duration range: {min_duration}s to {max_duration}s\n\n")
        
        for filename in os.listdir(input_dir):
            if filename.endswith('.json'):
                input_path = os.path.join(input_dir, filename)
                output_path = os.path.join(output_dir, filename)
                
                print(f"\n处理文件: {filename}")
                filter_by_duration(input_path, output_path, min_duration, max_duration)
                
                # 读取单个文件日志以获取统计信息
                log_dir = os.path.join(output_dir, "filter_logs")
                latest_log = max(
                    [f for f in os.listdir(log_dir) if f.startswith('removed_entries')],
                    key=lambda f: os.path.getmtime(os.path.join(log_dir, f)))
                
                with open(os.path.join(log_dir, latest_log), 'r', encoding='utf-8') as log_f:
                    log_content = log_f.read()
                    removed_count = log_content.count("Key: ")
                
                summary_f.write(f"\nFile: {filename}\n")
                summary_f.write(f"Removed entries: {removed_count}\n")
                summary_f.write("-"*40 + "\n")
                
                total_removed += removed_count
                total_processed += 1
        
        summary_f.write(f"\nTotal files processed: {total_processed}\n")
        summary_f.write(f"Total entries removed: {total_removed}\n")
    
    print(f"\n处理完成！所有文件的总日志已保存到: {summary_log}")

if __name__ == "__main__":
    # 使用示例 - 处理单个文件
    input_json = "silence.json"  # 替换为你的输入文件路径
    output_json = "silence_filtered_output.json"  # 输出文件路径
    filter_by_duration(input_json, output_json)
    
    # 使用示例 - 处理整个目录
    # input_directory = "./input_4JOB_overlap"  # 替换为你的输入目录
    # output_directory = "./filtered_output"  # 替换为你的输出目录
    # process_directory(input_directory, output_directory)