/*
 * Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
 *
 * This program 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 Affero 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/>.
 */

use std::convert::From;

use actix_web::http;
use actix_web::http::StatusCode;
use actix_web::HttpResponse;
use actix_web::HttpResponseBuilder;
use actix_web::ResponseError;
use derive_more::{Display, Error};
use serde::{Deserialize, Serialize};
use url::ParseError;

#[derive(Debug, Display, PartialEq, Eq, Error)]
#[cfg(not(tarpaulin_include))]
#[allow(dead_code)]
pub enum ServiceError {
    #[display(fmt = "unauthorized")]
    Unauthorized,

    #[display(fmt = "internal server error")]
    InternalServerError,

    #[display(
        fmt = "This server is is closed for registration. Contact admin if this is unexpecter"
    )]
    ClosedForRegistration,

    #[display(fmt = "The value you entered for URL is not a URL")] //405j
    NotAUrl,

    #[display(fmt = "Wrong password")]
    WrongPassword,
}

#[derive(Serialize, Deserialize)]
#[cfg(not(tarpaulin_include))]
pub struct ErrorToResponse {
    pub error: String,
}

#[cfg(not(tarpaulin_include))]
impl ResponseError for ServiceError {
    #[cfg(not(tarpaulin_include))]
    fn error_response(&self) -> HttpResponse {
        HttpResponseBuilder::new(self.status_code())
            .append_header((
                http::header::CONTENT_TYPE,
                "application/json; charset=UTF-8",
            ))
            .body(
                serde_json::to_string(&ErrorToResponse {
                    error: self.to_string(),
                })
                .unwrap(),
            )
    }

    #[cfg(not(tarpaulin_include))]
    fn status_code(&self) -> StatusCode {
        match self {
            ServiceError::ClosedForRegistration => StatusCode::FORBIDDEN,
            ServiceError::InternalServerError => StatusCode::INTERNAL_SERVER_ERROR,
            ServiceError::NotAUrl => StatusCode::BAD_REQUEST,
            ServiceError::WrongPassword => StatusCode::UNAUTHORIZED,
            ServiceError::Unauthorized => StatusCode::UNAUTHORIZED,
        }
    }
}

impl From<ParseError> for ServiceError {
    #[cfg(not(tarpaulin_include))]
    fn from(_: ParseError) -> ServiceError {
        ServiceError::NotAUrl
    }
}

#[cfg(not(tarpaulin_include))]
pub type ServiceResult<V> = std::result::Result<V, ServiceError>;