from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from .core.config import settings
from .database import Base, engine
from .routes import auth, apikey, chat, about

def run_migrations():
    try:
        from alembic import command
        from alembic.config import Config
        import os
        cfg = Config(os.path.join(os.path.dirname(__file__), "migrations", "alembic.ini"))
        cfg.set_main_option("script_location", os.path.join(os.path.dirname(__file__), "migrations"))
        cfg.set_main_option("sqlalchemy.url", settings.DATABASE_URL)
        command.upgrade(cfg, "head")
    except Exception as e:
        print("Alembic migration error:", e)

def create_app() -> FastAPI:
    app = FastAPI(title=settings.APP_NAME)

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

    Base.metadata.bind = engine

    app.include_router(auth.router)
    app.include_router(apikey.router)
    app.include_router(chat.router)
    app.include_router(about.router)
    return app