// zotapi - Rust wrapper for Sot API as implemented by Hubzilla
// Copyright (C) 2018  Harald Eilertsen <haraldei@anduin.net>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU 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 General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

use reqwest;
use std::fmt::Display;

#[derive(Debug)]
pub enum Error {
    APIError(String),
    Http(reqwest::Error),
    Io(std::io::Error),
    Json(serde_json::Error),
    ParseError(url::ParseError),
    Qs(serde_qs::Error),
    Unauthorized,
    Unknown,
}

impl Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::APIError(s) => write!(f, "APIError: {}", s)?,
            Self::Http(e) => write!(f, "Http: {}", e.to_string())?,
            Self::Io(e) => write!(f, "Io: {}", e.to_string())?,
            Self::Json(e) => write!(f, "Json: {}", e.to_string())?,
            Self::ParseError(e) => write!(f, "URL: {}", e.to_string())?,
            Self::Qs(e) => write!(f, "Qs: {}", e.to_string())?,
            Self::Unauthorized => write!(f, "unauthorized")?,
            _ => write!(f, "unknown error")?,
        };

        Ok(())
    }
}

impl std::error::Error for Error {}

impl From<reqwest::Error> for Error {
    fn from(e: reqwest::Error) -> Error {
        Error::Http(e)
    }
}

impl From<reqwest::StatusCode> for Error {
    fn from(s: reqwest::StatusCode) -> Error {
        match s {
            reqwest::StatusCode::UNAUTHORIZED => Error::Unauthorized,
            _ => Error::Unknown,
        }
    }
}

impl From<std::io::Error> for Error {
    fn from(e: std::io::Error) -> Error {
        Error::Io(e)
    }
}

impl From<serde_json::Error> for Error {
    fn from(e: serde_json::Error) -> Error {
        Error::Json(e)
    }
}

impl From<url::ParseError> for Error {
    fn from(e: url::ParseError) -> Error {
        Error::ParseError(e)
    }
}

impl From<serde_qs::Error> for Error {
    fn from(e: serde_qs::Error) -> Error {
        Error::Qs(e)
    }
}

impl From<&str> for Error {
    fn from(msg: &str) -> Error {
        Error::APIError(msg.to_string())
    }
}