"""FastAPI routes for CALY food image analysis."""

from __future__ import annotations

import logging

from fastapi import APIRouter, File, HTTPException, UploadFile

from api.schemas import FoodAnalysisResponse
from main_pipeline import analyze_food_image
from utils.image_utils import decode_image_bytes

LOGGER = logging.getLogger(__name__)

router = APIRouter(tags=["camera"])


@router.post("/analyze-food", response_model=FoodAnalysisResponse)
async def analyze_food(image: UploadFile = File(...)) -> FoodAnalysisResponse:
    """Accept a meal image and return food names, grams, and calibration method."""

    if image.content_type and not image.content_type.startswith("image/"):
        raise HTTPException(status_code=415, detail="Uploaded file must be an image")

    try:
        content = await image.read()
        image_bgr = decode_image_bytes(content)
        result = analyze_food_image(image_bgr)
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    except Exception as exc:
        LOGGER.exception("Unhandled API analysis error")
        raise HTTPException(status_code=500, detail="Food analysis failed") from exc

    return FoodAnalysisResponse(**result)