import os
from pathlib import Path
from typing import List

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

from backend.app.routers import customers, projects, finance


def create_app() -> FastAPI:
    app = FastAPI(
        title="Ops-Core",
        description="Monolithic automation & business ops platform",
        version="0.1.0",
    )

    # CORS
    raw_origins = os.getenv("CORS_ORIGINS")
    if raw_origins:
        origins: List[str] = [o.strip() for o in raw_origins.split(",") if o.strip()]
    else:
        origins = ["*"]

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

    # Routers
    app.include_router(customers.router)
    app.include_router(projects.router)
    app.include_router(finance.router)

    # Static data mount (for quotes, contracts, finance archives, etc.)
    data_dir = Path("data")
    data_dir.mkdir(parents=True, exist_ok=True)
    app.mount("/data", StaticFiles(directory=str(data_dir)), name="data")

    return app


app = create_app()