from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
from sqlalchemy import text

from app.core.database import engine, AsyncSessionLocal, Base
from app.core.config import settings
from app.api import auth, activities, routes, health, records, upload


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

        # Try to enable TimescaleDB hypertable for data points
        try:
            await conn.execute(text(
                "SELECT create_hypertable('activity_data_points', 'timestamp', "
                "if_not_exists => TRUE, migrate_data => TRUE)"
            ))
        except Exception:
            pass  # Already exists or TimescaleDB not available

    # Seed admin user
    async with AsyncSessionLocal() as db:
        from sqlalchemy import select
        from app.models.user import User
        from app.core.security import hash_password

        result = await db.execute(
            select(User).where(User.username == settings.admin_username)
        )
        if not result.scalar_one_or_none():
            admin = User(
                username=settings.admin_username,
                hashed_password=hash_password(settings.admin_password),
                is_admin=True,
            )
            db.add(admin)
            await db.commit()

    yield


app = FastAPI(
    title="FitTracker",
    version="1.0.0",
    lifespan=lifespan,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"] if settings.environment == "development" else [],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(auth.router, prefix="/api/auth", tags=["auth"])
app.include_router(activities.router, prefix="/api/activities", tags=["activities"])
app.include_router(routes.router, prefix="/api/routes", tags=["routes"])
app.include_router(health.router, prefix="/api/health-metrics", tags=["health"])
app.include_router(records.router, prefix="/api/records", tags=["records"])
app.include_router(upload.router, prefix="/api/upload", tags=["upload"])


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