from fastapi import APIRouter, Depends, HTTPException, status, UploadFile, File, Form
from sqlalchemy.orm import Session
from sqlalchemy import func
from typing import List, Optional
import uuid
import hashlib
import os
import logging
from datetime import datetime
from dotenv import load_dotenv

from database import get_db
from models.media import Media, MediaDirectory, MediaTag, MediaTagMapping, MediaStatus
from models.company_r2_config import CompanyR2Config
from models.user import User
from schemas.media import (
    MediaResponse, MediaCreate, MediaUpdate,
    MediaDirectoryResponse, MediaDirectoryCreate, MediaDirectoryUpdate,
    MediaTagResponse, MediaTagCreate, MediaTagUpdate,
    MediaBatchResponse,
    MediaBatchDeleteRequest, MediaBatchUpdateRequest, MediaBatchTagRequest
)
from routers.auth import get_current_user
from utils.r2_uploader import R2Uploader, R2Config, get_r2_uploader

router = APIRouter()

# 配置日志
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)


def get_r2_config(db: Session, company_code: str) -> Optional[R2Config]:
    """获取 R2 配置，优先级：1.当前公司配置 → 2.'0000'公司配置 → 3..env 环境配置"""
    
    # 重新加载 .env 文件，确保获取最新配置
    load_dotenv()
    
    # 1. 优先获取当前公司的 R2 配置
    logger.info(f"🔍 查找 R2 配置 - 公司编码：{company_code}")
    config = db.query(CompanyR2Config).filter(
        CompanyR2Config.company_code == company_code
    ).first()
    
    if config and config.r2_enabled:
        logger.info(f"✅ 使用当前公司 R2 配置：{company_code}")
        return R2Config({
            'r2_account_id': config.r2_account_id,
            'r2_access_key_id': config.r2_access_key_id,
            'r2_secret_access_key': config.r2_secret_access_key,
            'r2_bucket_name': config.r2_bucket_name,
            'r2_public_url': config.r2_public_url,
            'r2_enabled': config.r2_enabled
        })
    
    # 2. 获取默认公司（0000）的 R2 配置
    if company_code != "0000":
        config = db.query(CompanyR2Config).filter(
            CompanyR2Config.company_code == "0000"
        ).first()
        
        if config and config.r2_enabled:
            logger.info(f"✅ 使用默认公司 R2 配置：0000")
            return R2Config({
                'r2_account_id': config.r2_account_id,
                'r2_access_key_id': config.r2_access_key_id,
                'r2_secret_access_key': config.r2_secret_access_key,
                'r2_bucket_name': config.r2_bucket_name,
                'r2_public_url': config.r2_public_url,
                'r2_enabled': config.r2_enabled
            })
    
    # 3. 从 .env 文件读取 R2 配置
    logger.info(f"ℹ️  尝试从 .env 文件读取 R2 配置")
    r2_account_id = os.getenv("R2_ACCOUNT_ID", "")
    r2_access_key_id = os.getenv("R2_ACCESS_KEY_ID", "")
    r2_secret_access_key = os.getenv("R2_SECRET_ACCESS_KEY", "")
    r2_bucket_name = os.getenv("R2_BUCKET_NAME", "")
    r2_public_url = os.getenv("R2_PUBLIC_URL", "")
    r2_enabled = os.getenv("R2_ENABLED", "true").lower() in ("true", "1", "yes")
    
    logger.info(f"   - R2_ACCOUNT_ID: {r2_account_id[:10] if r2_account_id else 'None'}...")
    logger.info(f"   - R2_ACCESS_KEY_ID: {r2_access_key_id[:10] if r2_access_key_id else 'None'}...")
    logger.info(f"   - R2_BUCKET_NAME: {r2_bucket_name}")
    logger.info(f"   - R2_ENABLED: {r2_enabled}")
    
    if r2_account_id and r2_access_key_id and r2_secret_access_key and r2_bucket_name:
        logger.info(f"✅ 使用 .env 文件中的 R2 配置")
        return R2Config({
            'r2_account_id': r2_account_id,
            'r2_access_key_id': r2_access_key_id,
            'r2_secret_access_key': r2_secret_access_key,
            'r2_bucket_name': r2_bucket_name,
            'r2_public_url': r2_public_url,
            'r2_enabled': r2_enabled
        })
    
    logger.error(f"❌ 未找到任何 R2 配置")
    return None


def generate_media_id() -> str:
    """生成32位UUID作为media_id"""
    return uuid.uuid4().hex


def generate_file_hash(file_path: str) -> str:
    """生成文件MD5哈希"""
    hash_md5 = hashlib.md5()
    with open(file_path, "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash_md5.update(chunk)
    return hash_md5.hexdigest()


# ==================== 目录管理（先排，避免与 {media_id} 冲突） ====================

@router.get("/directories", response_model=List[MediaDirectoryResponse])
async def get_media_directories(
    parent_id: Optional[int] = None,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """获取媒体目录列表"""
    print(f"获取目录列表 - parent_id: {parent_id}, company_code: {current_user.company_code}")
    
    query = db.query(MediaDirectory).filter(
        MediaDirectory.company_code == current_user.company_code
    )
    
    if parent_id is not None:
        query = query.filter(MediaDirectory.parent_id == parent_id)
    else:
        query = query.filter(MediaDirectory.parent_id == None)
    
    directories = query.order_by(MediaDirectory.sort_order, MediaDirectory.created_at).all()
    
    # 为每个目录计算总大小和文件数量
    result = []
    for directory in directories:
        # 查询该目录下的所有媒体文件总大小（只统计未删除的）
        total_size = db.query(func.sum(Media.file_size)).filter(
            Media.directory_id == directory.id,
            Media.company_code == current_user.company_code,
            Media.is_deleted == False
        ).scalar() or 0
        
        # 查询该目录下的媒体文件数量（只统计未删除的）
        media_count = db.query(func.count(Media.media_id)).filter(
            Media.directory_id == directory.id,
            Media.company_code == current_user.company_code,
            Media.is_deleted == False
        ).scalar() or 0
        
        # 创建响应对象
        dir_response = MediaDirectoryResponse(
            id=directory.id,
            name=directory.name,
            parent_id=directory.parent_id,
            path=directory.path,
            level=directory.level,
            sort_order=directory.sort_order,
            cover_r2_key=directory.cover_r2_key,
            cover_r2_url=directory.cover_r2_url,
            description=directory.description,
            is_public=directory.is_public,
            media_count=media_count,
            total_size=total_size,
            company_code=directory.company_code,
            created_at=directory.created_at,
            updated_at=directory.updated_at
        )
        result.append(dir_response)
    
    print(f"查询到 {len(result)} 个目录: {[d.name for d in result]}")
    
    return result


@router.get("/directories/{directory_id}", response_model=MediaDirectoryResponse)
async def get_media_directory(
    directory_id: int,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """获取单个媒体目录"""
    directory = db.query(MediaDirectory).filter(
        MediaDirectory.id == directory_id,
        MediaDirectory.company_code == current_user.company_code
    ).first()
    
    if not directory:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Directory not found"
        )
    
    return directory


@router.post("/directories", response_model=MediaDirectoryResponse, status_code=status.HTTP_201_CREATED)
async def create_media_directory(
    directory_data: MediaDirectoryCreate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """创建媒体目录"""
    try:
        print(f"创建文件夹请求 - name: {directory_data.name}, parent_id: {directory_data.parent_id}, company_code: {current_user.company_code}")
        
        # 验证文件夹名称
        if not directory_data.name or directory_data.name.strip() == '':
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="文件夹名称不能为空"
            )
        
        # 验证父目录
        parent = None
        if directory_data.parent_id is not None:
            parent = db.query(MediaDirectory).filter(
                MediaDirectory.id == directory_data.parent_id,
                MediaDirectory.company_code == current_user.company_code
            ).first()
            
            if not parent:
                raise HTTPException(
                    status_code=status.HTTP_404_NOT_FOUND,
                    detail="父目录不存在"
                )
        
        # 检查同级目录是否已存在同名文件夹
        existing_dir = db.query(MediaDirectory).filter(
            MediaDirectory.name == directory_data.name,
            MediaDirectory.company_code == current_user.company_code,
            MediaDirectory.parent_id == directory_data.parent_id
        ).first()
        
        if existing_dir:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="同级目录下已存在同名文件夹"
            )
        
        # 生成路径
        path = directory_data.name
        level = 0
        
        if parent:
            path = f"{parent.path}/{directory_data.name}"
            level = parent.level + 1
        
        directory = MediaDirectory(
            name=directory_data.name,
            parent_id=directory_data.parent_id,
            company_code=current_user.company_code,
            path=path,
            level=level,
            sort_order=directory_data.sort_order or 0,
            cover_r2_key=directory_data.cover_r2_key,
            cover_r2_url=directory_data.cover_r2_url,
            description=directory_data.description,
            is_public=directory_data.is_public or False
        )
        
        db.add(directory)
        db.commit()
        db.refresh(directory)
        
        print(f"文件夹创建成功 - id: {directory.id}, name: {directory.name}")
        
        return directory
        
    except HTTPException:
        db.rollback()
        raise
    except Exception as e:
        db.rollback()
        print(f"创建文件夹失败: {str(e)}")
        import traceback
        traceback.print_exc()
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"创建文件夹失败: {str(e)}"
        )


@router.put("/directories/{directory_id}", response_model=MediaDirectoryResponse)
async def update_media_directory(
    directory_id: int,
    directory_update: MediaDirectoryUpdate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """更新媒体目录"""
    directory = db.query(MediaDirectory).filter(
        MediaDirectory.id == directory_id,
        MediaDirectory.company_code == current_user.company_code
    ).first()
    
    if not directory:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Directory not found"
        )
    
    update_data = directory_update.model_dump(exclude_unset=True)
    
    # 如果更新父目录，需要重新计算路径
    if 'parent_id' in update_data and update_data['parent_id'] != directory.parent_id:
        if update_data['parent_id']:
            parent = db.query(MediaDirectory).filter(
                MediaDirectory.id == update_data['parent_id'],
                MediaDirectory.company_code == current_user.company_code
            ).first()
            
            if parent:
                directory.path = f"{parent.path}/{directory.name}"
                directory.level = parent.level + 1
        else:
            directory.path = directory.name
            directory.level = 0
    
    for field, value in update_data.items():
        setattr(directory, field, value)
    
    db.commit()
    db.refresh(directory)
    
    return directory


@router.delete("/directories/{directory_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_media_directory(
    directory_id: int,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """删除媒体目录"""
    directory = db.query(MediaDirectory).filter(
        MediaDirectory.id == directory_id,
        MediaDirectory.company_code == current_user.company_code
    ).first()
    
    if not directory:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Directory not found"
        )
    
    # 检查是否有子目录
    child_count = db.query(MediaDirectory).filter(
        MediaDirectory.parent_id == directory_id,
        MediaDirectory.company_code == current_user.company_code
    ).count()
    
    if child_count > 0:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="该文件夹下还有子文件夹，无法删除"
        )
    
    # 检查是否有媒体文件
    media_count = db.query(Media).filter(
        Media.directory_id == directory_id,
        Media.company_code == current_user.company_code
    ).count()
    
    if media_count > 0:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="该文件夹下还有文件，无法删除"
        )
    
    db.delete(directory)
    db.commit()
    
    return None


# ==================== 标签管理 ====================

@router.get("/tags", response_model=List[MediaTagResponse])
async def get_tags(
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """获取标签列表"""
    tags = db.query(MediaTag).filter(
        MediaTag.company_code == current_user.company_code
    ).order_by(MediaTag.sort_order, MediaTag.created_at).all()
    
    return tags


@router.post("/tags", response_model=MediaTagResponse, status_code=status.HTTP_201_CREATED)
async def create_tag(
    tag_data: MediaTagCreate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """创建标签"""
    tag = MediaTag(
        tag_name=tag_data.tag_name,
        tag_color=tag_data.tag_color,
        sort_order=tag_data.sort_order or 0,
        company_code=current_user.company_code
    )
    
    db.add(tag)
    db.commit()
    db.refresh(tag)
    
    return tag


@router.put("/tags/{tag_id}", response_model=MediaTagResponse)
async def update_tag(
    tag_id: int,
    tag_update: MediaTagUpdate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """更新标签"""
    tag = db.query(MediaTag).filter(
        MediaTag.id == tag_id,
        MediaTag.company_code == current_user.company_code
    ).first()
    
    if not tag:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Tag not found"
        )
    
    update_data = tag_update.model_dump(exclude_unset=True)
    for field, value in update_data.items():
        setattr(tag, field, value)
    
    db.commit()
    db.refresh(tag)
    
    return tag


@router.delete("/tags/{tag_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_tag(
    tag_id: int,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """删除标签"""
    tag = db.query(MediaTag).filter(
        MediaTag.id == tag_id,
        MediaTag.company_code == current_user.company_code
    ).first()
    
    if not tag:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Tag not found"
        )
    
    db.delete(tag)
    db.commit()
    
    return None


@router.post("/tags/batch")
async def batch_add_tags(
    batch_tag: MediaBatchTagRequest,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """批量添加标签到素材"""
    # 验证标签是否存在
    for tag_id in batch_tag.tag_ids:
        tag = db.query(MediaTag).filter(
            MediaTag.id == tag_id,
            MediaTag.company_code == current_user.company_code
        ).first()
        
        if not tag:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail=f"Tag {tag_id} not found"
            )
    
    # 更新素材的标签
    media_list = db.query(Media).filter(
        Media.media_id.in_(batch_tag.media_ids),
        Media.company_code == current_user.company_code
    ).all()
    
    if not media_list:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="No media found"
        )
    
    for media in media_list:
        current_tags = media.tags or []
        for tag_id in batch_tag.tag_ids:
            if tag_id not in current_tags:
                current_tags.append(tag_id)
        media.tags = current_tags
    
    db.commit()
    
    return {"message": "Tags added successfully", "count": len(media_list)}


@router.delete("/tags/batch")
async def batch_remove_tags(
    batch_tag: MediaBatchTagRequest,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """批量移除素材的标签"""
    media_list = db.query(Media).filter(
        Media.media_id.in_(batch_tag.media_ids),
        Media.company_code == current_user.company_code
    ).all()
    
    if not media_list:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="No media found"
        )
    
    for media in media_list:
        current_tags = media.tags or []
        media.tags = [tag_id for tag_id in current_tags if tag_id not in batch_tag.tag_ids]
    
    db.commit()
    
    return {"message": "Tags removed successfully", "count": len(media_list)}


# ==================== 批量操作 ====================

@router.post("/batch", response_model=MediaBatchResponse)
async def batch_upload_media(
    files: List[UploadFile] = File(...),
    directory_id: Optional[int] = Form(None),
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """批量上传媒体文件（每 5 张一批次）"""
    logger.info(f"\n{'='*60}")
    logger.info(f"🚀 接收到批量上传请求")
    logger.info(f"{'='*60}")
    logger.info(f"📊 文件数：{len(files)}")
    logger.info(f"📊 directory_id: {directory_id}")
    logger.info(f"👤 用户：{current_user.username}")
    logger.info(f"🏢 公司编码：{current_user.company_code}")
    logger.info(f"📧 邮箱：{current_user.email}")
    logger.info(f"🆔 用户 ID: {current_user.id}")
    
    # 验证文件数量
    if len(files) == 0:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="No files provided"
        )
    
    # 生成批次 ID
    batch_id = generate_media_id()
    logger.info(f"📦 生成批次 ID: {batch_id}")
    
    # 添加调试信息到响应
    debug_info = {
        'company_code': current_user.company_code,
        'username': current_user.username,
        'user_id': current_user.id
    }
    
    # 验证并处理每个文件
    results = []
    successful = 0
    failed = 0
    
    # 收集文件信息
    file_infos = []
    valid_files = []
    
    for idx, file in enumerate(files, 1):
        print(f"\n[{idx}/{len(files)}] 处理文件：{file.filename}")
        
        # 验证文件类型
        content_type = file.content_type or ""
        print(f"  - 文件类型：{content_type}")
        
        if not any(t in content_type for t in ['image', 'video']):
            print(f"  ❌ 文件类型不支持")
            results.append({
                'file_name': file.filename,
                'status': 'failed',
                'error': '仅支持图片和视频文件'
            })
            failed += 1
            continue
        
        # 验证文件大小
        file_content = await file.read()
        file_size = len(file_content)
        print(f"  - 文件大小：{file_size} 字节 ({file_size / 1024:.2f} KB)")
        
        if file_size > 5 * 1024 * 1024:
            print(f"  ❌ 文件大小超过限制")
            results.append({
                'file_name': file.filename,
                'status': 'failed',
                'error': '文件大小超过 5MB 限制'
            })
            failed += 1
            continue
        
        # 生成文件名（MD5）
        file_hash = hashlib.md5(file_content).hexdigest()
        file_extension = os.path.splitext(file.filename)[1]
        r2_key = f"{file_hash}{file_extension}"
        print(f"  - 文件哈希：{file_hash}")
        print(f"  - R2 Key: {r2_key}")
        
        # 生成media_id
        media_id = generate_media_id()
        
        # 收集文件信息
        file_info = {
            'media_id': media_id,
            'file_name': file.filename,
            'file_content': file_content,
            'file_size': file_size,
            'content_type': content_type,
            'r2_key': r2_key,
            'directory_id': directory_id
        }
        
        file_infos.append(file_info)
        valid_files.append(file_info)
    
    # 批量检查数据库中是否存在相同文件
    existing_r2_keys = set()
    existing_media_map = {}
    
    if valid_files:
        # 提取所有r2_key
        r2_keys = [f['r2_key'] for f in valid_files]
        
        # 批量查询数据库，只查询r2_url有值的记录
        existing_medias = db.query(Media).filter(
            Media.r2_key.in_(r2_keys),
            Media.r2_url.isnot(None),
            Media.r2_url != ''
        ).all()
        
        # 构建映射
        for media in existing_medias:
            existing_r2_keys.add(media.r2_key)
            existing_media_map[media.r2_key] = media
        
        print(f"  📊 数据库中已存在 {len(existing_r2_keys)} 个文件")
    
    # 按MD5分组文件，相同MD5的文件只上传一次到R2
    md5_groups = {}
    
    for file_info in valid_files:
        r2_key = file_info['r2_key']
        
        if r2_key in existing_r2_keys:
            # 文件已存在，复用R2文件信息
            existing_media = existing_media_map[r2_key]
            print(f"  ⚠️  文件已存在，复用R2文件但创建新记录")
            print(f"    - 复用R2 Key：{existing_media.r2_key}")
            print(f"    - 复用R2 URL：{existing_media.r2_url}")
            print(f"    - 目标目录：{file_info['directory_id']}")
            
            # 创建新的数据库记录，复用R2文件信息
            new_media = Media(
                media_id=file_info['media_id'],
                file_name=file_info['file_name'],
                r2_key=existing_media.r2_key,
                r2_url=existing_media.r2_url,
                thumbnail_r2_key=existing_media.thumbnail_r2_key,
                thumbnail_r2_url=existing_media.thumbnail_r2_url,
                media_type=existing_media.media_type,
                mime_type=existing_media.mime_type,
                file_size=existing_media.file_size,
                directory_id=file_info['directory_id'],
                batch_id=batch_id,
                status=MediaStatus.SUCCESS,
                company_code=current_user.company_code
            )
            
            db.add(new_media)
            db.commit()
            db.refresh(new_media)
            
            print(f"  ✅ 新记录创建成功 - media_id: {file_info['media_id']}")
            
            results.append({
                'file_name': file_info['file_name'],
                'media_id': file_info['media_id'],
                'status': 'success',
                'r2_url': existing_media.r2_url,
                'thumbnail_r2_url': existing_media.thumbnail_r2_url,
                'info': '复用R2文件，创建新记录'
            })
            successful += 1
        else:
            # 文件不存在，添加到上传列表
            if r2_key not in md5_groups:
                md5_groups[r2_key] = {
                    'file_content': file_info['file_content'],
                    'file_size': file_info['file_size'],
                    'content_type': file_info['content_type'],
                    'files': []
                }
            
            # 添加文件信息到分组
            md5_groups[r2_key]['files'].append({
                'media_id': file_info['media_id'],
                'file_name': file_info['file_name'],
                'directory_id': file_info['directory_id']
            })
    
    # 获取 R2 配置
    r2_config = get_r2_config(db, current_user.company_code)
    
    if not r2_config:
        print(f"  ❌ R2 配置未找到")
        for r2_key, group in md5_groups.items():
            for file_info in group['files']:
                results.append({
                    'file_name': file_info['file_name'],
                    'status': 'failed',
                    'error': 'R2 配置未找到'
                })
                failed += 1
    else:
        print(f"  ✅ R2 配置已加载：{r2_config.bucket_name}")
        
        # 准备批量上传文件
        files_to_upload = []
        thumbnails_to_upload = []
        
        for r2_key, group in md5_groups.items():
            # 添加到文件上传列表
            files_to_upload.append({
                'file_buffer': group['file_content'],
                'file_name': r2_key,
                'content_type': group['content_type']
            })
            
            # 如果是图片，添加到缩略图上传列表
            if 'image' in group['content_type']:
                thumbnails_to_upload.append({
                    'file_buffer': group['file_content'],
                    'file_name': f"thumb_{r2_key}",
                    'width': 200,
                    'height': 200
                })
        
        # 批量上传文件
        upload_results = {}
        thumbnail_results = {}
        
        if files_to_upload:
            print(f"  📤 开始批量上传 {len(files_to_upload)} 个唯一文件到 R2...")
            r2_uploader = R2Uploader(r2_config, company_code=current_user.company_code)
            upload_results = await r2_uploader.batch_upload_files(files_to_upload, max_concurrency=5)
            
            # 批量上传缩略图
            if thumbnails_to_upload:
                print(f"  🖼️  开始批量上传 {len(thumbnails_to_upload)} 个缩略图到 R2...")
                thumbnail_results = await r2_uploader.batch_upload_thumbnails(thumbnails_to_upload, max_concurrency=5)
        
        # 处理上传结果
        for r2_key, group in md5_groups.items():
            r2_url = upload_results.get(r2_key, '')
            thumbnail_r2_url = thumbnail_results.get(f"thumb_{r2_key}", '')
            
            if r2_url:
                # 为该MD5分组中的每个文件创建数据库记录
                for file_info in group['files']:
                    # 保存到数据库
                    print(f"  💾 保存到数据库...")
                    media = Media(
                        media_id=file_info['media_id'],
                        file_name=file_info['file_name'],
                        r2_key=r2_key,
                        r2_url=r2_url,
                        thumbnail_r2_key=f"thumb_{r2_key}" if 'image' in group['content_type'] else None,
                        thumbnail_r2_url=thumbnail_r2_url if 'image' in group['content_type'] else None,
                        media_type='image' if 'image' in group['content_type'] else 'video',
                        mime_type=group['content_type'] or "",
                        file_size=group['file_size'],
                        directory_id=file_info['directory_id'],
                        batch_id=batch_id,
                        status=MediaStatus.SUCCESS,
                        company_code=current_user.company_code
                    )
                    
                    db.add(media)
                    db.commit()
                    db.refresh(media)
                    
                    print(f"  ✅ 数据库保存成功 - media_id: {file_info['media_id']}")
                    
                    results.append({
                        'file_name': file_info['file_name'],
                        'media_id': file_info['media_id'],
                        'status': 'success',
                        'r2_url': r2_url,
                        'thumbnail_r2_url': thumbnail_r2_url,
                        'info': '复用R2文件，创建新记录' if len(group['files']) > 1 else ''
                    })
                    successful += 1
            else:
                # 上传失败，为该MD5分组中的每个文件添加失败记录并写入数据库
                for file_info in group['files']:
                    print(f"  ❌ 文件上传失败：{file_info['file_name']}")
                    
                    # 创建失败的数据库记录，以便后续可以重新上传
                    failed_media = Media(
                        media_id=file_info['media_id'],
                        file_name=file_info['file_name'],
                        r2_key=r2_key,
                        r2_url='',
                        thumbnail_r2_key=f"thumb_{r2_key}" if 'image' in group['content_type'] else None,
                        thumbnail_r2_url='',
                        media_type='image' if 'image' in group['content_type'] else 'video',
                        mime_type=group['content_type'] or "",
                        file_size=group['file_size'],
                        directory_id=file_info['directory_id'],
                        batch_id=batch_id,
                        status=MediaStatus.FAILED,
                        company_code=current_user.company_code
                    )
                    
                    db.add(failed_media)
                    db.commit()
                    db.refresh(failed_media)
                    
                    print(f"  💾 失败记录已保存到数据库 - media_id: {file_info['media_id']}")
                    
                    results.append({
                        'file_name': file_info['file_name'],
                        'media_id': file_info['media_id'],
                        'status': 'failed',
                        'error': '文件上传失败'
                    })
                    failed += 1
    
    logger.info(f"\n📊 批量上传完成 - 总计：{len(files)}, 成功：{successful}, 失败：{failed}")
    
    response_data = {
        'batch_id': batch_id,
        'total': len(files),
        'successful': successful,
        'failed': failed,
        'results': results,
        'debug': debug_info
    }
    
    logger.info(f"📥 返回响应：{response_data}")
    
    return response_data


@router.post("/batch/delete", status_code=status.HTTP_204_NO_CONTENT)
async def batch_delete_media(
    batch_delete: MediaBatchDeleteRequest,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """批量删除媒体素材（软删除）"""
    media_list = db.query(Media).filter(
        Media.media_id.in_(batch_delete.media_ids),
        Media.company_code == current_user.company_code,
        Media.is_deleted == False
    ).all()
    
    if not media_list:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="No media found"
        )
    
    print(f"\n📤 批量软删除 {len(media_list)} 个媒体文件")
    
    now = datetime.now()
    for idx, media in enumerate(media_list, 1):
        print(f"\n  [{idx}/{len(media_list)}] 软删除: {media.file_name}")
        print(f"     - R2 Key: {media.r2_key}")
        
        # 软删除：标记为已删除，不删除R2文件
        media.is_deleted = True
        media.deleted_at = now
    
    db.commit()
    print(f"\n✅ 批量软删除完成\n")
    
    return None


@router.post("/batch/update", response_model=List[MediaResponse])
async def batch_update_media(
    batch_update: MediaBatchUpdateRequest,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """批量更新媒体素材（设置目录、标签）"""
    media_list = db.query(Media).filter(
        Media.media_id.in_(batch_update.media_ids),
        Media.company_code == current_user.company_code
    ).all()
    
    if not media_list:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="No media found"
        )
    
    if batch_update.directory_id is not None:
        if batch_update.directory_id != 0:
            directory = db.query(MediaDirectory).filter(
                MediaDirectory.id == batch_update.directory_id,
                MediaDirectory.company_code == current_user.company_code
            ).first()
            
            if not directory:
                raise HTTPException(
                    status_code=status.HTTP_404_NOT_FOUND,
                    detail="Directory not found"
                )
    
    for media in media_list:
        if batch_update.directory_id is not None:
            media.directory_id = batch_update.directory_id if batch_update.directory_id > 0 else None
        
        if batch_update.tags is not None:
            media.tags = batch_update.tags
    
    db.commit()
    
    for media in media_list:
        db.refresh(media)
    
    return media_list


# ==================== 基础媒体操作（最后排，避免与其他路由冲突） ====================

@router.get("/", response_model=dict)
async def get_media_list(
    page: int = 1,
    page_size: int = 20,
    media_type: Optional[str] = None,
    status: Optional[str] = None,
    directory_id: Optional[int] = None,
    keyword: Optional[str] = None,
    tag_ids: Optional[List[int]] = None,
    start_date: Optional[str] = None,
    end_date: Optional[str] = None,
    min_size: Optional[int] = None,
    max_size: Optional[int] = None,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """获取媒体素材列表（支持搜索筛选）"""
    query = db.query(Media).filter(
        Media.company_code == current_user.company_code,
        Media.is_deleted == False
    )
    
    if keyword:
        query = query.filter(
            Media.file_name.contains(keyword) |
            Media.media_id.contains(keyword)
        )
    
    if media_type:
        query = query.filter(Media.media_type == media_type)
    
    if status:
        query = query.filter(Media.status == status)
    
    if directory_id is not None:
        query = query.filter(Media.directory_id == directory_id)
    
    if tag_ids:
        query = query.filter(
            Media.tags.contains(tag_ids)
        )
    
    if start_date:
        query = query.filter(Media.created_at >= start_date)
    
    if end_date:
        query = query.filter(Media.created_at <= end_date)
    
    if min_size is not None:
        query = query.filter(Media.file_size >= min_size)
    
    if max_size is not None:
        query = query.filter(Media.file_size <= max_size)
    
    total = query.count()
    
    # 计算 skip
    skip = (page - 1) * page_size
    media_list = query.offset(skip).limit(page_size).all()
    
    # 转换为 MediaResponse 对象
    items = []
    for media in media_list:
        item = MediaResponse(
            id=media.id,
            media_id=media.media_id,
            file_name=media.file_name,
            file_path="",
            file_size=media.file_size,
            media_type=media.media_type,
            content_type=media.mime_type,
            r2_key=media.r2_key,
            r2_url=media.r2_url,
            thumbnail_r2_key=media.thumbnail_r2_key,
            thumbnail_r2_url=media.thumbnail_r2_url,
            width=media.width,
            height=media.height,
            duration=media.duration,
            status=media.status,
            error_message=media.error_message,
            directory_id=media.directory_id,
            tags=media.tags or [],
            metadata=media.metadata or {},
            company_code=media.company_code,
            created_at=media.created_at,
            updated_at=media.updated_at
        )
        items.append(item)
    
    return {
        'items': items,
        'total': total,
        'page': page,
        'page_size': page_size
    }


@router.get("/{media_id}", response_model=MediaResponse)
async def get_media(
    media_id: str,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """获取单个媒体素材"""
    media = db.query(Media).filter(
        Media.media_id == media_id,
        Media.company_code == current_user.company_code,
        Media.is_deleted == False
    ).first()
    
    if not media:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Media not found"
        )
    
    return media


@router.post("/", response_model=MediaResponse, status_code=status.HTTP_201_CREATED)
async def create_media(
    file: UploadFile = File(...),
    directory_id: Optional[int] = Form(None),
    description: Optional[str] = Form(None),
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """上传单个媒体文件"""
    # 验证文件类型
    allowed_types = ['image', 'video']
    content_type = file.content_type or ""
    
    if not any(t in content_type for t in allowed_types):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Only image and video files are allowed"
        )
    
    # 验证文件大小（最大5MB）
    file_size = 0
    file_content = await file.read()
    file_size = len(file_content)
    
    if file_size > 5 * 1024 * 1024:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="File size exceeds 5MB limit"
        )
    
    # 生成media_id
    media_id = generate_media_id()
    
    # 生成文件名（MD5）
    file_hash = hashlib.md5(file_content).hexdigest()
    file_extension = os.path.splitext(file.filename)[1]
    r2_key = f"{file_hash}{file_extension}"
    
    # 获取R2配置
    r2_config = get_r2_config(db, current_user.company_code)
    
    if not r2_config:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="R2 configuration not found"
        )
    
    # 上传到R2
    try:
        r2_uploader = R2Uploader(r2_config)
        
        # 上传原图
        file_buffer = file_content
        r2_url = await r2_uploader.upload_file(
            file_buffer=file_buffer,
            file_name=r2_key,
            content_type=content_type
        )
        
        # 生成缩略图（如果是图片）
        thumbnail_r2_key = None
        thumbnail_r2_url = None
        
        if 'image' in content_type:
            thumbnail_r2_key = f"thumb_{r2_key}"
            thumbnail_r2_url = await r2_uploader.upload_thumbnail(
                file_buffer=file_buffer,
                file_name=thumbnail_r2_key,
                width=200,
                height=200
            )
        
        # 保存到数据库
        media = Media(
            media_id=media_id,
            file_name=file.filename,
            r2_key=r2_key,
            r2_url=r2_url,
            thumbnail_r2_key=thumbnail_r2_key,
            thumbnail_r2_url=thumbnail_r2_url,
            media_type='image' if 'image' in content_type else 'video',
            mime_type=file.content_type or "",
            file_size=file_size,
            directory_id=directory_id,
            status=MediaStatus.SUCCESS,
            company_code=current_user.company_code
        )
        
        db.add(media)
        db.commit()
        db.refresh(media)
        
        return media
        
    except Exception as e:
        db.rollback()
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Upload failed: {str(e)}"
        )


@router.put("/{media_id}", response_model=MediaResponse)
async def update_media(
    media_id: str,
    media_update: MediaUpdate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """更新媒体素材"""
    media = db.query(Media).filter(
        Media.media_id == media_id,
        Media.company_code == current_user.company_code
    ).first()
    
    if not media:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Media not found"
        )
    
    update_data = media_update.model_dump(exclude_unset=True)
    for field, value in update_data.items():
        setattr(media, field, value)
    
    db.commit()
    db.refresh(media)
    
    return media


@router.delete("/{media_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_media(
    media_id: str,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """删除媒体素材（软删除）"""
    media = db.query(Media).filter(
        Media.media_id == media_id,
        Media.company_code == current_user.company_code,
        Media.is_deleted == False
    ).first()
    
    if not media:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Media not found"
        )
    
    print(f"\n📤 软删除媒体: {media.file_name} (ID: {media_id})")
    print(f"  - R2 Key: {media.r2_key}")
    
    # 软删除：标记为已删除，不删除R2文件
    media.is_deleted = True
    media.deleted_at = datetime.now()
    
    db.commit()
    print(f"  ✅ 软删除完成\n")
    
    return None