"""FastAPI application factory.

Run with uvicorn's factory mode (no import-time DB side effects):

    uvicorn ams.api.app:create_app --factory --reload
"""

from __future__ import annotations

from fastapi import FastAPI

from .. import __version__
from .db import configure, init_db
from .routes import diff, games, snapshots


def create_app(database_url: str | None = None) -> FastAPI:
    configure(database_url)
    init_db()

    app = FastAPI(title="ams — engine surface catalog", version=__version__)
    app.include_router(games.router)
    app.include_router(snapshots.router)
    app.include_router(diff.router)

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

    return app