from fastapi import FastAPI, File, HTTPException, UploadFile
from fastapi.responses import Response

from modules.api_service import initialize_runtime, swap_face_from_uploads


app = FastAPI(title="Deep Live Cam Face Swap API", version="1.0.0")


@app.on_event("startup")
def startup_event() -> None:
    initialize_runtime()


@app.get("/health")
def health() -> dict[str, str]:
    return {"status": "ok"}


@app.post("/face-swap")
async def face_swap(
    source_image: UploadFile = File(...),
    target_image: UploadFile = File(...),
) -> Response:
    try:
        content, media_type = swap_face_from_uploads(
            await source_image.read(),
            await target_image.read(),
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    except Exception as exc:
        raise HTTPException(status_code=500, detail=str(exc)) from exc

    return Response(content=content, media_type=media_type)