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

#[derive(Error, Debug)]
pub enum AppError {
    #[error("Unauthorized")]
    Unauthorized,

    #[error("Not found")]
    NotFound,

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

    #[error("Internal error: {0}")]
    Internal(#[from] anyhow::Error),
}

impl IntoResponse for AppError {
    fn into_response(self) -> Response {
        let (status, message) = match &self {
            AppError::Unauthorized    => (StatusCode::UNAUTHORIZED, self.to_string()),
            AppError::NotFound        => (StatusCode::NOT_FOUND, self.to_string()),
            AppError::BadRequest(msg) => (StatusCode::BAD_REQUEST, msg.clone()),
            AppError::Internal(_)     => {
                tracing::error!("{}", self);
                (StatusCode::INTERNAL_SERVER_ERROR, "Internal server error".into())
            }
        };
        (status, Json(serde_json::json!({ "error": message }))).into_response()
    }
}

impl From<sqlx::Error> for AppError {
    fn from(e: sqlx::Error) -> Self {
        AppError::Internal(anyhow::anyhow!(e))
    }
}

impl From<jsonwebtoken::errors::Error> for AppError {
    fn from(_e: jsonwebtoken::errors::Error) -> Self {
        AppError::Unauthorized
    }
}