"""Common error response schema and exception handlers."""

from datetime import datetime

from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from starlette.exceptions import HTTPException

from app.core.exceptions import AppException


class ErrorResponse(BaseModel):
    """Standard error response format."""

    status_code: int
    message: str
    details: dict | None = None
    timestamp: str


async def app_exception_handler(request: Request, exc: AppException) -> JSONResponse:
    """Handle application exceptions with standard response."""
    return JSONResponse(
        status_code=exc.status_code,
        content={
            "status_code": exc.status_code,
            "message": exc.message,
            "timestamp": datetime.utcnow().isoformat(),
        },
    )


async def http_exception_handler(request: Request, exc: HTTPException) -> JSONResponse:
    """Handle HTTP exceptions with standard response."""
    return JSONResponse(
        status_code=exc.status_code,
        content={
            "status_code": exc.status_code,
            "message": str(exc.detail),
            "timestamp": datetime.utcnow().isoformat(),
        },
    )


def register_exception_handlers(app: FastAPI):
    """Register all exception handlers with FastAPI app."""
    app.add_exception_handler(
        AppException,
        app_exception_handler,  # type: ignore[arg-type]
    )
    app.add_exception_handler(
        HTTPException,
        http_exception_handler,  # type: ignore[arg-type]
    )