use axum::{
    http::StatusCode,
    response::{IntoResponse, Response},
};
use sqlx::Error as SqlxError;
use thiserror::Error;

#[derive(Error, Debug)]
pub(crate) enum AppError {
    #[error("Account not found: {0}")]
    AccountNotFound(i64),
    #[error("Account already exists")]
    AccountAlreadyExists,
    #[error("Insufficient funds")]
    InsufficientFunds,
    #[error("Database error: {0}")]
    DatabaseError(#[from] SqlxError),
    #[error("Invalid input: {0}")]
    InvalidInput(String),
}

impl IntoResponse for AppError {
    fn into_response(self) -> Response {
        let status = match self {
            AppError::AccountNotFound(_) => StatusCode::NOT_FOUND,
            AppError::InsufficientFunds => StatusCode::BAD_REQUEST,
            AppError::AccountAlreadyExists => StatusCode::BAD_REQUEST,
            AppError::DatabaseError(_) => StatusCode::INTERNAL_SERVER_ERROR,
            AppError::InvalidInput(_) => StatusCode::BAD_REQUEST,
        };

        (status, self.to_string()).into_response()
    }
}