# -*- coding: utf-8 -*-
"""
数据预处理命令行接口

使用示例:
    # 合并 Excel 文件
    python -m data_preprocessing.cli merge --source raw_data/remotecontrol --output cleaned_data/merged.csv
    
    # 合并并排序
    python -m data_preprocessing.cli merge --source raw_data/remotecontrol --sort-by SendTime
    
    # 排序已有 CSV
    python -m data_preprocessing.cli sort --input data.csv --output sorted.csv --time-col SendTime
    
    # 初始化目录结构
    python -m data_preprocessing.cli init
"""

import argparse
import sys
from .config import default_config
from .sorter import sort_by_time
from .merger import merge_files


def main():
    parser = argparse.ArgumentParser(
        prog="data_preprocessing",
        description="数据预处理工具：排序、合并",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
示例:
  %(prog)s merge --source raw_data/remotecontrol --sort-by SendTime
  %(prog)s sort --input data.csv --time-col CreateTime
  %(prog)s init
        """
    )
    
    subparsers = parser.add_subparsers(dest="command", help="可用命令")
    
    # ========== merge 命令 ==========
    merge_parser = subparsers.add_parser("merge", help="合并同类文件")
    merge_parser.add_argument(
        "--source", "-s",
        required=True,
        help="源数据目录路径"
    )
    merge_parser.add_argument(
        "--output", "-o",
        default=None,
        help="输出文件路径 (默认: cleaned_data/<目录名>_merged.csv)"
    )
    merge_parser.add_argument(
        "--pattern", "-p",
        default="*.xlsx",
        help="文件匹配模式 (默认: *.xlsx)"
    )
    merge_parser.add_argument(
        "--sort-by",
        default=None,
        dest="time_column",
        help="合并后按此时间列排序"
    )
    merge_parser.add_argument(
        "--no-source-col",
        action="store_true",
        help="不添加来源文件列"
    )
    
    # ========== sort 命令 ==========
    sort_parser = subparsers.add_parser("sort", help="按时间排序 CSV")
    sort_parser.add_argument(
        "--input", "-i",
        required=True,
        help="输入 CSV 文件路径"
    )
    sort_parser.add_argument(
        "--output", "-o",
        default=None,
        help="输出文件路径 (默认: cleaned_data/<文件名>_sorted.csv)"
    )
    sort_parser.add_argument(
        "--time-col", "-t",
        default=None,
        dest="time_column",
        help=f"时间列名 (默认: {default_config.default_time_column})"
    )
    sort_parser.add_argument(
        "--inplace",
        action="store_true",
        help="原地覆盖输入文件"
    )
    
    # ========== init 命令 ==========
    init_parser = subparsers.add_parser("init", help="初始化目录结构")
    
    # 解析参数
    args = parser.parse_args()
    
    if args.command is None:
        parser.print_help()
        sys.exit(0)
    
    try:
        if args.command == "merge":
            result = merge_files(
                source_dir=args.source,
                output_file=args.output,
                pattern=args.pattern,
                time_column=args.time_column,
                add_source_column=not args.no_source_col
            )
            print(f"\n✅ 合并成功: {result}")
            
        elif args.command == "sort":
            result = sort_by_time(
                input_path=args.input,
                output_path=args.output,
                time_column=args.time_column,
                inplace=args.inplace
            )
            print(f"\n✅ 排序成功: {result}")
            
        elif args.command == "init":
            default_config.ensure_dirs()
            print("\n✅ 目录初始化完成")
            
    except FileNotFoundError as e:
        print(f"\n❌ 错误: {e}")
        sys.exit(1)
    except KeyError as e:
        print(f"\n❌ 错误: {e}")
        sys.exit(1)
    except Exception as e:
        print(f"\n❌ 未知错误: {e}")
        sys.exit(1)


if __name__ == "__main__":
    main()