use axum::{
    Json,
    http::StatusCode,
    response::{IntoResponse, Response},
};
use serde_json::json;
use thiserror::Error;

#[derive(Error, Debug)]
pub enum AppError {
    #[error("Not Found: {0}")]
    NotFound(String),

    #[error("Forbidden: {0}")]
    Forbidden(String),

    #[error("Internal Server Error: {0}")]
    Internal(String),

    #[error("Bad Request: {0}")]
    BadRequest(String),
}

impl IntoResponse for AppError {
    fn into_response(self) -> Response {
        let (status, error_message) = match &self {
            AppError::NotFound(msg) => (StatusCode::NOT_FOUND, msg.clone()),
            AppError::Forbidden(msg) => (StatusCode::FORBIDDEN, msg.clone()),
            AppError::Internal(msg) => (StatusCode::INTERNAL_SERVER_ERROR, msg.clone()),
            AppError::BadRequest(msg) => (StatusCode::BAD_REQUEST, msg.clone()),
        };

        let body = Json(json!({
            "error": error_message,
        }));

        (status, body).into_response()
    }
}