"""FastAPI application for component detection."""

import logging
from contextlib import asynccontextmanager

from fastapi import FastAPI

from component_detection.models.schemas import HealthResponse
from component_detection.routes.detection import router as detection_router
from component_detection.services.dependencies import get_detection_service

logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(name)s - %(levelname)s - %(message)s")
logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Ensure model is loaded on startup, cleanup on shutdown."""
    service = get_detection_service()
    if not service.is_loaded:
        service.load_model()
    logger.info("Application started - model ready for inference.")
    yield
    logger.info("Application shutting down.")


app = FastAPI(
    title="Component Detection API",
    description="Detect solar panel components (Lfoot, microinverter, rail, solar panel) using RF-DETR.",
    version="0.1.0",
    lifespan=lifespan,
)

app.include_router(detection_router)


@app.get("/health", response_model=HealthResponse)
async def health_check() -> HealthResponse:
    """Health check endpoint."""
    service = get_detection_service()
    return HealthResponse(status="ok", model_loaded=service.is_loaded)