from fastapi import APIRouter, UploadFile, File, HTTPException, Request
from fastapi.responses import StreamingResponse, JSONResponse
from service import AddBgService
from utils import jingrow_api_verify_and_billing
from settings import settings
import json
import asyncio

router = APIRouter(prefix=settings.router_prefix)
service = AddBgService()

@router.post(settings.batch_route)
@jingrow_api_verify_and_billing(api_name=settings.api_name)
async def add_background_batch(data: dict, request: Request):
    """
    批量处理多个URL图片
    
    Args:
        data: 包含图片URL列表和配置参数的字典
        request: FastAPI 请求对象
        
    Returns:
        流式响应，包含每个图片的处理结果
    """
    if "urls" not in data:
        raise HTTPException(status_code=400, detail="缺少urls参数")
    
    config = data.get("config", {})
    
    async def process_and_stream():
        total = len(data["urls"])
        for index, url in enumerate(data["urls"], 1):
            try:
                result = await service.add_background(url, config)
                result.update({
                    "index": index,
                    "total": total,
                    "original_url": url
                })
                yield json.dumps(result) + "\n"
            except Exception as e:
                yield json.dumps({
                    "status": "error",
                    "message": str(e),
                    "index": index,
                    "total": total,
                    "original_url": url
                }) + "\n"
    
    return StreamingResponse(
        process_and_stream(),
        media_type="application/x-ndjson"
    )

@router.post(settings.file_route)
@jingrow_api_verify_and_billing(api_name=settings.api_name)
async def add_background_file(file: UploadFile = File(...), config: str = None, request: Request = None):
    """
    为上传的文件添加背景
    
    Args:
        file: 上传的图片文件
        config: JSON格式的配置参数
        request: FastAPI 请求对象
        
    Returns:
        处理后的图片内容
    """
    content = await file.read()
    
    # 解析配置参数
    config_dict = {}
    if config:
        try:
            config_dict = json.loads(config)
        except json.JSONDecodeError:
            raise HTTPException(status_code=400, detail="配置参数格式错误")
    
    result = await service.add_background_from_file(content, config_dict)
    return result