from collections.abc import AsyncGenerator
from contextlib import asynccontextmanager

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

from remodel_api import __version__
from remodel_api.db.session import init_db
from remodel_api.routers import scenarios


@asynccontextmanager
async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:  # pragma: no cover
    await init_db()
    yield


app = FastAPI(
    title="REmodel API",
    version=__version__,
    description="Hybrid RE project finance modeling — Solar + Wind + BESS",
    lifespan=lifespan,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:3000"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(scenarios.router, prefix="/api")


@app.get("/healthz", tags=["ops"])
async def healthz() -> dict[str, str]:
    return {"status": "ok", "version": __version__}