from fastapi import APIRouter, Depends, HTTPException, UploadFile, File, Query
from sqlalchemy.orm import Session
from app.database import get_db
from app.services.config_service import ConfigService
from app.schemas.config_schema import (
    ConfigBatchUpdate, ConfigListResponse, ConfigResponse
)
from app.dependencies.auth import get_current_admin

router = APIRouter(prefix="/api/admin", tags=["系统配置"])

@router.get("/config", response_model=ConfigListResponse)
def get_all_configs(
    db: Session = Depends(get_db),
    admin = Depends(get_current_admin)
):
    """获取所有配置项"""
    service = ConfigService(db)
    configs = service.get_all_configs()
    return ConfigListResponse(data=configs)

@router.put("/config", response_model=ConfigResponse)
def update_configs(
    update_data: ConfigBatchUpdate,
    db: Session = Depends(get_db),
    admin = Depends(get_current_admin)
):
    """批量更新配置项"""
    service = ConfigService(db)
    try:
        service.update_configs(update_data.configs, admin.id)
        return ConfigResponse(message="配置更新成功", data=None)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))

@router.get("/config/{config_key}/history", response_model=ConfigResponse)
def get_config_history(
    config_key: str,
    page: int = 1,
    size: int = 20,
    db: Session = Depends(get_db),
    admin = Depends(get_current_admin)
):
    """获取配置修改历史"""
    service = ConfigService(db)
    history = service.get_config_history(config_key, page, size)
    return ConfigResponse(data=history)

@router.post("/config/{config_key}/reset", response_model=ConfigResponse)
def reset_config(
    config_key: str,
    db: Session = Depends(get_db),
    admin = Depends(get_current_admin)
):
    """重置配置为默认值"""
    service = ConfigService(db)
    try:
        service.reset_config(config_key, admin.id)
        return ConfigResponse(message="配置重置成功", data=None)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.post("/oss/upload")
async def admin_upload_file(
    file: UploadFile = File(...),
    prefix: str = Query(default="uploads"),
    admin = Depends(get_current_admin)
):
    """管理员上传文件到 OSS"""
    from app.services.oss_service import get_oss_service
    content = await file.read()
    if len(content) > 10 * 1024 * 1024:
        raise HTTPException(status_code=400, detail="文件大小不能超过 10MB")
    oss_service = get_oss_service()
    try:
        url = oss_service.upload_file(content, prefix, file.filename)
        return {"code": 200, "data": {"url": url, "filename": file.filename}}
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"上传失败: {str(e)}")