from fastapi import FastAPI, Request
from fastapi.exceptions import RequestValidationError
from fastapi.responses import JSONResponse

from app.api.routes import router
from app.core.config import settings


app = FastAPI(
    title=settings.app_name,
    version="1.0.0",
)


@app.exception_handler(RequestValidationError)
async def validation_exception_handler(request: Request, exc: RequestValidationError):
    errors: list[dict[str, str]] = []

    for item in exc.errors():
        loc = [str(part) for part in item.get("loc", []) if part not in ("body", "query", "path")]
        field = ".".join(loc) if loc else "request"
        message = item.get("msg", "Ошибка валидации")
        message = message.replace("Value error, ", "")
        message = message.replace("Value error,", "")
        errors.append({"field": field, "message": message})

    detail = errors[0]["message"] if errors else "Ошибка валидации запроса"

    return JSONResponse(
        status_code=422,
        content={
            "detail": detail,
            "errors": errors,
        },
    )


@app.get("/")
async def root():
    return {
        "service": settings.app_name,
        "env": settings.app_env,
        "status": "ok",
        "port": settings.app_port,
        "api_prefix": settings.api_v1_prefix,
    }


app.include_router(router)