from pydantic import BaseModel
from typing import Optional, List
from datetime import datetime


class FileUploadResponse(BaseModel):
    """文件上传响应模型"""
    success: bool
    message: str
    object_key: Optional[str] = None
    file_url: Optional[str] = None
    etag: Optional[str] = None
    request_id: Optional[str] = None
    error_code: Optional[str] = None


class FileInfo(BaseModel):
    """文件信息模型"""
    success: bool
    object_key: Optional[str] = None
    size: Optional[int] = None
    last_modified: Optional[datetime] = None
    content_type: Optional[str] = None
    etag: Optional[str] = None
    message: Optional[str] = None


class FileListItem(BaseModel):
    """文件列表项模型"""
    key: str
    size: int
    last_modified: Optional[str] = None
    etag: str


class FileListResponse(BaseModel):
    """文件列表响应模型"""
    success: bool
    files: Optional[List[FileListItem]] = None
    count: Optional[int] = None
    message: Optional[str] = None


class DeleteFileResponse(BaseModel):
    """删除文件响应模型"""
    success: bool
    message: str
    object_key: Optional[str] = None
    request_id: Optional[str] = None
    error_code: Optional[str] = None


class HealthCheck(BaseModel):
    """健康检查响应模型"""
    status: str
    message: str
    timestamp: datetime