from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.openapi.docs import get_swagger_ui_html, get_swagger_ui_oauth2_redirect_html

from app.api.router import api_router
from app.core.config import get_settings

settings = get_settings()

app = FastAPI(
    title=settings.app_name,
    version="0.1.0",
    description="面向五金加工企业的流程化、工序化、成本化 ERP API 服务",
    docs_url=None,
    redoc_url=None,
    openapi_url="/openapi.json",
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.cors_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
    expose_headers=["Content-Disposition"],
)

app.include_router(api_router, prefix=settings.api_prefix)


@app.get("/docs", include_in_schema=False)
def custom_swagger_ui_html():
    return get_swagger_ui_html(
        openapi_url=app.openapi_url,
        title=f"{app.title} - API 文档",
        oauth2_redirect_url=app.swagger_ui_oauth2_redirect_url,
        swagger_js_url="https://cdn.staticfile.net/swagger-ui/5.1.0/swagger-ui-bundle.js",
        swagger_css_url="https://cdn.staticfile.net/swagger-ui/5.1.0/swagger-ui.css",
    )


@app.get(app.swagger_ui_oauth2_redirect_url, include_in_schema=False)
def swagger_ui_redirect():
    return get_swagger_ui_oauth2_redirect_html()


@app.get("/")
def root() -> dict[str, str]:
    return {
        "name": settings.app_name,
        "env": settings.app_env,
        "message": "Baihua Hardware ERP API is running.",
    }