use axum::http::StatusCode;
use axum::response::{IntoResponse, Response};
use std::error::Error;
use std::fmt;
use std::io;

pub type Result<T> = std::result::Result<T, ServerError>;

#[derive(Debug)]
pub enum ServerError {
    IO(io::Error),
    Axum(axum::Error),
    Db(sea_orm::DbErr),
    Status(StatusCode),
}

impl fmt::Display for ServerError {
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ServerError::IO(err) => write!(fmt, "{}", err),
            ServerError::Axum(err) => write!(fmt, "{}", err),
            ServerError::Status(status) => write!(fmt, "{}", status),
            ServerError::Db(err) => write!(fmt, "{}", err),
        }
    }
}

impl Error for ServerError {}

impl IntoResponse for ServerError {
    fn into_response(self) -> Response {
        tracing::error!("{:?}", self);

        match self {
            ServerError::IO(_) => StatusCode::INTERNAL_SERVER_ERROR.into_response(),
            ServerError::Axum(_) => StatusCode::INTERNAL_SERVER_ERROR.into_response(),
            ServerError::Status(status) => status.into_response(),
            ServerError::Db(sea_orm::DbErr::RecordNotFound(_)) => {
                StatusCode::NOT_FOUND.into_response()
            }
            ServerError::Db(_) => StatusCode::INTERNAL_SERVER_ERROR.into_response(),
        }
    }
}

impl From<io::Error> for ServerError {
    fn from(err: io::Error) -> Self {
        ServerError::IO(err)
    }
}

impl From<axum::Error> for ServerError {
    fn from(err: axum::Error) -> Self {
        ServerError::Axum(err)
    }
}

impl From<tokio::task::JoinError> for ServerError {
    fn from(err: tokio::task::JoinError) -> Self {
        ServerError::IO(err.into())
    }
}

impl From<StatusCode> for ServerError {
    fn from(status: StatusCode) -> Self {
        Self::Status(status)
    }
}

impl From<sea_orm::DbErr> for ServerError {
    fn from(err: sea_orm::DbErr) -> Self {
        ServerError::Db(err)
    }
}