from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from sqlalchemy import func, select

from app.config import settings
from app.database import async_session, engine
from app.models import Base, Program
from app.api import programs, events, tiers


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Create tables on startup
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)

    # Auto-seed if database is empty
    async with async_session() as session:
        result = await session.execute(select(func.count(Program.id)))
        count = result.scalar()
        if count == 0:
            print("  → Database is empty — running seed...")
            from seed import seed as run_seed
            await run_seed()

    yield


app = FastAPI(
    title="KMountain Flower Radio API",
    description="Backend API for the KMountain Flower Radio Station website.",
    version="1.0.0",
    lifespan=lifespan,
)

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

# Register routers
app.include_router(programs.router, prefix="/api/programs", tags=["programs"])
app.include_router(events.router, prefix="/api/events", tags=["events"])
app.include_router(tiers.router, prefix="/api/tiers", tags=["tiers"])

# Dev-only admin router (disabled in production)
if settings.ENV != "production":
    from app.api import admin
    app.include_router(admin.router, prefix="/api/admin", tags=["admin"])