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//  ------------------------------------------------------------------
//  Airone
//  is a Rust library which provides a simple in-memory,
//  write-on-update database that is persisted
//  to an append-only transaction file.
//
//  Copyright © 2022 Massimo Gismondi
//
//  This file is part of Airone.
//  Airone is free software: you can redistribute it and/or
//  modify it under the terms of the GNU Affero General Public License
//  as published by the Free Software Foundation, either version 3
//  of the License, or (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//  GNU General Public License for more details.

//  You should have received a copy of the GNU Affero General Public License
//  along with this program. If not, see <https://www.gnu.org/licenses/>.
//  ------------------------------------------------------------------

#[cfg(feature = "rocket")]
use rocket::http::{ContentType, Status};
#[cfg(feature = "rocket")]
use rocket::request::Request;
#[cfg(feature = "rocket")]
use rocket::response;
#[cfg(feature = "rocket")]
use rocket::response::{Responder, Response};
#[cfg(feature = "rocket")]
use std::io::Cursor;
use std::{error::Error, fmt};

/// An type representing the Error situations
/// Airone can return
#[derive(Debug, PartialEq)]
pub enum AironeError
{
    OutOfBound,
    ListAlreadyEmpty,
    ParseFailed,
    IOError
}

#[cfg(feature = "rocket")]
impl<'r> Responder<'r, 'static> for AironeError
{
    fn respond_to(self, _: &'r Request<'_>) -> response::Result<'static>
    {
        let st = format!("{:?}", self);
        Response::build()
            .header(ContentType::Plain)
            .status(Status::ImATeapot)
            .sized_body(st.len(), Cursor::new(st))
            .ok()
    }
}

impl Error for AironeError {}
impl fmt::Display for AironeError
{
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result
    {
        write!(f, "Error type: {}", format!("{:?}", self))
    }
}