#!/usr/bin/env python3
"""HuggingFace 公共存储工具 - Python 版本

用于上传/下载项目文件到 HF Storage Space

环境变量:
    HF_STORAGE_REPO    存储库名称 (格式: username/repo)
    HF_TOKEN           HuggingFace Token (需要 write 权限)
    HF_API_URL         HF API 地址 (默认: https://huggingface.co)
"""

import argparse
import json
import os
import sys
from pathlib import Path
from typing import Optional

try:
    from huggingface_hub import HfApi, hf_hub_download
    from huggingface_hub.utils import HfHubHTTPError
except ModuleNotFoundError:
    print("错误: 需要安装 huggingface_hub")
    print("安装: pip install huggingface_hub")
    sys.exit(1)


class HFStorage:
    """HuggingFace 存储工具"""

    def __init__(self, repo: Optional[str] = None, token: Optional[str] = None):
        self.repo = os.getenv("HF_STORAGE_REPO", repo or "").strip()
        self.token = os.getenv("HF_TOKEN", token or "").strip()
        if not self.repo:
            raise ValueError("HF_STORAGE_REPO 未设置")
        if not self.token:
            raise ValueError("HF_TOKEN 未设置")
        self.api = HfApi(token=self.token)

    def upload_file(self, file_path: str, dest: Optional[str] = None) -> bool:
        """上传单个文件"""
        local_path = Path(file_path)
        if not local_path.exists():
            print(f"错误: 文件不存在: {file_path}")
            return False

        dest_path = dest or local_path.name
        print(f"上传: {local_path} -> {self.repo}/{dest_path}")

        try:
            self.api.upload_file(
                path_or_fileobj=str(local_path),
                path_in_repo=dest_path,
                repo_id=self.repo,
                repo_type="space",
            )
            print(f"  成功!")
            return True
        except Exception as e:
            print(f"  失败: {e}")
            return False

    def upload_directory(self, dir_path: str, prefix: str = "") -> dict:
        """上传整个目录"""
        local_dir = Path(dir_path)
        if not local_dir.is_dir():
            print(f"错误: 目录不存在: {dir_path}")
            return {"success": 0, "failed": 0}

        results = {"success": 0, "failed": 0, "files": []}

        for file_path in local_dir.rglob("*"):
            if file_path.is_file():
                rel_path = file_path.relative_to(local_dir)
                dest_path = f"{prefix}/{rel_path}" if prefix else str(rel_path)

                print(f"上传: {rel_path} -> {dest_path}")
                try:
                    self.api.upload_file(
                        path_or_fileobj=str(file_path),
                        path_in_repo=dest_path,
                        repo_id=self.repo,
                        repo_type="space",
                    )
                    results["success"] += 1
                    results["files"].append({"local": str(rel_path), "remote": dest_path, "status": "success"})
                except Exception as e:
                    results["failed"] += 1
                    results["files"].append({"local": str(rel_path), "remote": dest_path, "status": "failed", "error": str(e)})
                    print(f"  失败: {e}")

        return results

    def download_file(self, filename: str, local_path: str = ".") -> Optional[Path]:
        """下载文件"""
        print(f"下载: {self.repo}/{filename} -> {local_path}")

        try:
            path = hf_hub_download(
                repo_id=self.repo,
                filename=filename,
                local_dir=local_path,
                token=self.token,
            )
            print(f"  成功: {path}")
            return Path(path)
        except HfHubHTTPError as e:
            if e.response and e.response.status_code == 404:
                print(f"  文件不存在: {filename}")
            else:
                print(f"  失败: {e}")
            return None
        except Exception as e:
            print(f"  失败: {e}")
            return None

    def list_files(self, path: str = "") -> list:
        """列出文件"""
        print(f"列出: {self.repo}{'/' + path if path else ''}")

        try:
            files = self.api.list_repo_files(repo_id=self.repo, repo_type="space")
            if path:
                files = [f for f in files if f.startswith(path)]

            for f in files:
                print(f"  {f}")

            return list(files)
        except Exception as e:
            print(f"  失败: {e}")
            return []

    def sync(self, local_dir: str, remote_dir: str = "") -> dict:
        """同步目录"""
        local_path = Path(local_dir)
        if not local_path.is_dir():
            print(f"错误: 目录不存在: {local_dir}")
            return {"success": 0, "failed": 0, "skipped": 0}

        print(f"同步: {local_dir} -> {self.repo}{'/' + remote_dir if remote_dir else ''}")

        # 获取远程文件列表
        remote_files = set()
        try:
            for f in self.api.list_repo_files(repo_id=self.repo, repo_type="space"):
                if not remote_dir or f.startswith(remote_dir + "/"):
                    key = f[len(remote_dir) + 1:] if remote_dir else f
                    remote_files.add(key)
        except Exception as e:
            print(f"  获取远程文件列表失败: {e}")

        results = {"success": 0, "failed": 0, "skipped": 0}

        for file_path in local_path.rglob("*"):
            if file_path.is_file():
                rel_path = str(file_path.relative_to(local_path))
                dest_path = f"{remote_dir}/{rel_path}" if remote_dir else rel_path

                if rel_path in remote_files:
                    print(f"  跳过(已存在): {rel_path}")
                    results["skipped"] += 1
                else:
                    print(f"  上传: {rel_path} -> {dest_path}")
                    try:
                        self.api.upload_file(
                            path_or_fileobj=str(file_path),
                            path_in_repo=dest_path,
                            repo_id=self.repo,
                            repo_type="space",
                        )
                        results["success"] += 1
                    except Exception as e:
                        results["failed"] += 1
                        print(f"    失败: {e}")

        return results

    def delete_file(self, filename: str) -> bool:
        """删除文件"""
        print(f"删除: {self.repo}/{filename}")

        try:
            self.api.delete_file(
                repo_id=self.repo,
                path_in_repo=filename,
                repo_type="space",
            )
            print("  成功!")
            return True
        except Exception as e:
            print(f"  失败: {e}")
            return False

    def get_info(self) -> dict:
        """获取存储库信息"""
        try:
            info = self.api.repo_info(repo_id=self.repo, repo_type="space")
            return {
                "id": info.id,
                "name": info.id,
                "private": info.private,
                "created_at": str(info.created_at) if info.created_at else None,
            }
        except Exception as e:
            print(f"获取信息失败: {e}")
            return {}


def main():
    parser = argparse.ArgumentParser(
        description="HuggingFace 公共存储工具",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
示例:
  # 设置环境变量
  export HF_STORAGE_REPO="username/storage"
  export HF_TOKEN="hf_xxxx"

  # 上传文件
  hf-storage.py upload ./build.tar.gz

  # 上传目录
  hf-storage.py upload-dir ./src

  # 下载文件
  hf-storage.py download ./build.tar.gz

  # 列出文件
  hf-storage.py list

  # 同步目录
  hf-storage.py sync ./dist /public
        """
    )
    sub = parser.add_subparsers(dest="command", help="命令")

    # upload
    p_upload = sub.add_parser("upload", help="上传单个文件")
    p_upload.add_argument("file", help="本地文件路径")
    p_upload.add_argument("dest", nargs="?", help="远程目标路径")

    # upload-dir
    p_upload_dir = sub.add_parser("upload-dir", help="上传整个目录")
    p_upload_dir.add_argument("dir", help="本地目录路径")
    p_upload_dir.add_argument("prefix", nargs="?", help="远程目录前缀")

    # download
    p_download = sub.add_parser("download", help="下载文件")
    p_download.add_argument("file", help="远程文件路径")
    p_download.add_argument("path", nargs="?", default=".", help="本地保存路径")

    # list
    p_list = sub.add_parser("list", help="列出文件")
    p_list.add_argument("path", nargs="?", default="", help="列出特定路径下的文件")

    # sync
    p_sync = sub.add_parser("sync", help="同步目录")
    p_sync.add_argument("local_dir", help="本地目录")
    p_sync.add_argument("remote_dir", nargs="?", default="", help="远程目录")

    # delete
    p_delete = sub.add_parser("delete", help="删除文件")
    p_delete.add_argument("file", help="要删除的远程文件路径")

    # info
    p_info = sub.add_parser("info", help="获取存储库信息")

    args = parser.parse_args()

    try:
        storage = HFStorage()
    except ValueError as e:
        print(f"错误: {e}")
        print("请设置 HF_STORAGE_REPO 和 HF_TOKEN 环境变量")
        sys.exit(1)

    if args.command == "upload":
        storage.upload_file(args.file, args.dest)
    elif args.command == "upload-dir":
        results = storage.upload_directory(args.dir, args.prefix or "")
        print(f"\n上传完成: 成功 {results['success']}, 失败 {results['failed']}")
    elif args.command == "download":
        storage.download_file(args.file, args.path)
    elif args.command == "list":
        storage.list_files(args.path)
    elif args.command == "sync":
        results = storage.sync(args.local_dir, args.remote_dir or "")
        print(f"\n同步完成: 成功 {results['success']}, 失败 {results['failed']}, 跳过 {results['skipped']}")
    elif args.command == "delete":
        storage.delete_file(args.file)
    elif args.command == "info":
        info = storage.get_info()
        print(json.dumps(info, indent=2))
    else:
        parser.print_help()


if __name__ == "__main__":
    main()