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

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

@router.post(settings.batch_route)
@jingrow_api_verify_and_billing(api_name=settings.api_name)
async def remove_background_batch(data: dict, request: Request):
    """
    批量处理多个URL图片
    
    Args:
        data: 包含图片URL列表的字典
        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")
    
    async def process_and_stream():
        async for result in service.process_batch(data["urls"]):
            yield json.dumps(result) + "\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 remove_background_file(file: UploadFile = File(...), request: Request = None):
    """
    从上传的文件移除背景（流式返回）
    
    Args:
        file: 上传的图片文件
        request: FastAPI 请求对象
        
    Returns:
        流式响应，包含处理后的图片内容
    """
    content = await file.read()
    
    async def process_and_stream():
        result = await service.remove_background_from_file(content)
        yield json.dumps(result) + "\n"
    
    return StreamingResponse(
        process_and_stream(),
        media_type="application/x-ndjson"
    )