#!/usr/bin/env python3
"""
批量更新配置文件中的路径
=====================================================
使用方法:
    python update_paths.py --dataset-root /new/dataset/path --checkpoint-root /new/checkpoint/path
=====================================================
"""

import os
import re
import argparse
from pathlib import Path


# 旧路径模式
OLD_PATTERNS = {
    "dataset": [
        r"/mnt/SSD8T/home/wjj/dataset",
    ],
    "checkpoint": [
        r"/mnt/SSD8T/home/wjj/code/DeCLIP_private/checkpoints",
        r"/mnt/SSD8T/home/wjj/code/DeCLIP_private/logs",
        r"/mnt/SSD8T/home/wjj/code/DeCLIP/logs",
        r"/mnt/SSD8T/home/wjj/code/DeCLIP/backup_bin/logs",
        r"/mnt/SSD8T/home/wjj/code/my_CLIPSelf/logs",
        r"/mnt/SSD8T/home/wjj/code/my_CLIPSelf/checkpoints",
    ],
    "sam": [
        r"/mnt/SSD8T/home/wjj/code/ProxyCLIP/sam_ckpts",
    ],
    "hub": [
        r"/mnt/SSD8T/home/wjj/.cache/torch/hub",
    ],
}


def update_file(filepath: Path, replacements: dict, dry_run: bool = False):
    """更新单个文件中的路径"""
    try:
        content = filepath.read_text(encoding='utf-8')
    except Exception as e:
        print(f"  ⚠️ 无法读取文件: {e}")
        return False
    
    original_content = content
    changes = []
    
    for old_path, new_path in replacements.items():
        if old_path in content:
            content = content.replace(old_path, new_path)
            changes.append((old_path, new_path))
    
    if changes:
        print(f"\n📝 {filepath}")
        for old, new in changes:
            print(f"   {old}")
            print(f"   -> {new}")
        
        if not dry_run and content != original_content:
            try:
                filepath.write_text(content, encoding='utf-8')
                print(f"   ✅ 已更新")
            except Exception as e:
                print(f"   ❌ 写入失败: {e}")
                return False
    
    return True


def main():
    parser = argparse.ArgumentParser(description="批量更新配置文件中的路径")
    parser.add_argument("--dataset-root", type=str, required=True, help="新的数据集根路径")
    parser.add_argument("--checkpoint-root", type=str, required=True, help="新的权重根路径")
    parser.add_argument("--sam-root", type=str, help="SAM 权重路径 (默认: checkpoint-root/sam)")
    parser.add_argument("--hub-root", type=str, help="torch.hub 缓存路径 (默认: ~/.cache/torch/hub)")
    parser.add_argument("--config-dir", type=str, default="../configs", help="配置文件目录")
    parser.add_argument("--dry-run", action="store_true", help="仅显示将要修改的内容，不实际修改")
    args = parser.parse_args()
    
    # 处理相对路径
    script_dir = Path(__file__).parent
    config_dir = (script_dir / args.config_dir).resolve()
    
    if not config_dir.exists():
        print(f"❌ 配置目录不存在: {config_dir}")
        return
    
    # 构建替换规则
    dataset_root = Path(args.dataset_root).resolve()
    checkpoint_root = Path(args.checkpoint_root).resolve()
    sam_root = Path(args.sam_root).resolve() if args.sam_root else checkpoint_root / "sam"
    hub_root = Path(args.hub_root).resolve() if args.hub_root else Path.home() / ".cache/torch/hub"
    
    replacements = {}
    
    # 数据集路径
    for pattern in OLD_PATTERNS["dataset"]:
        replacements[pattern] = str(dataset_root)
    
    # 权重路径
    for pattern in OLD_PATTERNS["checkpoint"]:
        replacements[pattern] = str(checkpoint_root)
    
    # SAM 路径
    for pattern in OLD_PATTERNS["sam"]:
        replacements[pattern] = str(sam_root)
    
    # torch.hub 路径
    for pattern in OLD_PATTERNS["hub"]:
        replacements[pattern] = str(hub_root)
    
    print("=" * 60)
    print("🔧 批量更新配置文件路径")
    print("=" * 60)
    print(f"\n配置目录: {config_dir}")
    print(f"数据集路径: {dataset_root}")
    print(f"权重路径: {checkpoint_root}")
    print(f"SAM 路径: {sam_root}")
    print(f"Hub 缓存: {hub_root}")
    
    if args.dry_run:
        print("\n🔍 [DRY RUN] 仅显示将要修改的内容\n")
    
    # 查找所有配置文件
    config_files = list(config_dir.rglob("*.py"))
    print(f"\n找到 {len(config_files)} 个配置文件")
    
    # 更新每个文件
    updated_count = 0
    for filepath in config_files:
        if update_file(filepath, replacements, dry_run=args.dry_run):
            updated_count += 1
    
    # 同时更新代码文件中的硬编码路径
    code_files = [
        script_dir.parent / "proxyclip_segmentor.py",
        script_dir.parent / "tinyclip_proxy_segmentor.py",
    ]
    
    print(f"\n检查代码文件中的硬编码路径...")
    for filepath in code_files:
        if filepath.exists():
            update_file(filepath, replacements, dry_run=args.dry_run)
    
    print("\n" + "=" * 60)
    if args.dry_run:
        print("🔍 [DRY RUN] 完成预览，未实际修改文件")
    else:
        print(f"✅ 路径更新完成!")
    print("=" * 60)


if __name__ == "__main__":
    main()