from contextlib import asynccontextmanager

from fastapi import FastAPI, Request
from fastapi.exceptions import HTTPException
from fastapi.responses import JSONResponse

from app.config import get_settings
from app.database import Base, get_engine


@asynccontextmanager
async def lifespan(application: FastAPI):
    get_settings()
    # Verify DB connection and run migrations on startup
    engine = get_engine()
    async with engine.begin() as conn:
        # In production, Alembic handles migrations; this is a dev convenience
        await conn.run_sync(Base.metadata.create_all)
    yield
    await engine.dispose()


app = FastAPI(title="Reactbin API", version="1.0.0", lifespan=lifespan)


@app.exception_handler(HTTPException)
async def http_exception_handler(request: Request, exc: HTTPException):
    if isinstance(exc.detail, dict):
        return JSONResponse(status_code=exc.status_code, content=exc.detail)
    return JSONResponse(status_code=exc.status_code, content={"detail": exc.detail})


@app.get("/api/v1/health")
async def health():
    return {"status": "ok"}


# Routers registered after all modules are defined to avoid circular imports
from app.routers import auth, images, tags  # noqa: E402

app.include_router(auth.router, prefix="/api/v1")
app.include_router(images.router, prefix="/api/v1")
app.include_router(tags.router, prefix="/api/v1")