from contextlib import asynccontextmanager
from datetime import datetime
from typing import AsyncGenerator

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from app.database import init_db
from app.scheduler import start_scheduler, stop_scheduler, scheduler
from app.routers import devices, portfolio, recommendations, positions, signals, alerts
from app.models.schemas import HealthResponse


@asynccontextmanager
async def lifespan(app: FastAPI) -> AsyncGenerator:
    # Startup
    init_db()
    start_scheduler()
    yield
    # Shutdown
    stop_scheduler()


app = FastAPI(
    title="Options Sidekick",
    description="Covered call and cash-secured put recommendation engine",
    version="1.0.0",
    lifespan=lifespan,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_methods=["*"],
    allow_headers=["*"],
)

# Routers
app.include_router(devices.router, prefix="/api/v1")
app.include_router(portfolio.router, prefix="/api/v1")
app.include_router(recommendations.router, prefix="/api/v1")
app.include_router(positions.router, prefix="/api/v1")
app.include_router(signals.router, prefix="/api/v1")
app.include_router(alerts.router, prefix="/api/v1")


@app.get("/api/v1/health", response_model=HealthResponse, tags=["health"])
def health():
    from app.services.position_monitor import last_run
    return HealthResponse(
        status="ok",
        scheduler_running=scheduler.running,
        last_run=last_run,
    )