from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel, HttpUrl, conint
from typing import List

from main import get_images

app = FastAPI(title="Images API", version="1.0.0")

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"], allow_credentials=True, allow_methods=["*"], allow_headers=["*"],
)

class ImageItem(BaseModel):
    ref_url: HttpUrl
    num: conint(ge=1)

class GenerateRequest(BaseModel):
    items: List[ImageItem]

class ImageResult(BaseModel):
    ref_url: HttpUrl
    urls: List[HttpUrl]

class GenerateResponse(BaseModel):
    urls: List[ImageResult]

@app.get("/health")
def health():
    return {"ok": True}

def _generate_impl(req: GenerateRequest):
    try:
        urls = get_images(req.dict())  # get_images expects {"items":[...]}
        if not isinstance(urls, list):
            raise ValueError("get_images must return a List[ImageResult-like dicts]")
        return {"urls": urls}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

@app.post("/generate", response_model=GenerateResponse)
def generate(req: GenerateRequest):
    return _generate_impl(req)