from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse
from fastapi.exceptions import HTTPException, RequestValidationError
from starlette.exceptions import HTTPException as StarletteHTTPException
from config.settings import get_settings
from config.database import init_db
from src.routes import auth_router, users_router, projects_router

settings = get_settings()

app = FastAPI(
    title=settings.APP_NAME,
    version=settings.APP_VERSION,
    description="海洋项目管理系统后端API",
    docs_url="/docs",
    redoc_url="/redoc",
)

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

app.include_router(auth_router, prefix="/api/v1")
app.include_router(users_router, prefix="/api/v1")
app.include_router(projects_router, prefix="/api/v1")


@app.exception_handler(StarletteHTTPException)
async def http_exception_handler(request: Request, exc: StarletteHTTPException):
    if isinstance(exc.detail, dict):
        return JSONResponse(
            status_code=exc.status_code,
            content=exc.detail,
        )
    return JSONResponse(
        status_code=exc.status_code,
        content={
            "success": False,
            "message": exc.detail,
            "data": None,
            "error_code": None,
        },
    )


@app.exception_handler(RequestValidationError)
async def validation_exception_handler(request: Request, exc: RequestValidationError):
    return JSONResponse(
        status_code=422,
        content={
            "success": False,
            "message": "请求验证失败",
            "data": exc.errors(),
            "error_code": "1001",
        },
    )


@app.on_event("startup")
async def startup_event():
    await init_db()


@app.get("/")
async def root():
    return {
        "app": settings.APP_NAME,
        "version": settings.APP_VERSION,
        "status": "running",
    }


@app.get("/health")
async def health():
    return {"status": "healthy"}


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(
        "main:app",
        host="0.0.0.0",
        port=5000,
        reload=settings.DEBUG,
    )