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// Copyright 2017 Dmitry Tantsur <divius.inside@gmail.com>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Simple authentication methods.

use reqwest::{Client, IntoUrl, Method, RequestBuilder, Url};

use super::super::Result;
use super::AuthMethod;

/// Authentication method that provides no authentication.
///
/// This method always returns a constant fake token, and a pre-defined
/// endpoint.
#[derive(Clone, Debug)]
pub struct NoAuth {
    client: Client,
    endpoint: Url
}

impl NoAuth {
    /// Create a new fake authentication method using a fixed endpoint.
    ///
    /// This endpoint will be returned in response to all get_endpoint calls
    /// of the [AuthMethod](trait.AuthMethod.html) trait.
    pub fn new<U>(endpoint: U) -> Result<NoAuth> where U: IntoUrl {
        Ok(NoAuth {
            client: Client::new(),
            endpoint: endpoint.into_url()?
        })
    }
}

impl AuthMethod for NoAuth {
    /// Create a request.
    fn request(&self, method: Method, url: Url) -> Result<RequestBuilder> {
        Ok(self.client.request(method, url))
    }

    /// Get a predefined endpoint for all service types
    fn get_endpoint(&self, _service_type: String,
                    _endpoint_interface: Option<String>) -> Result<Url> {
        Ok(self.endpoint.clone())
    }

    fn refresh(&mut self) -> Result<()> { Ok(()) }
}

#[cfg(test)]
pub mod test {
    #![allow(unused_results)]

    use super::super::AuthMethod;
    use super::NoAuth;

    #[test]
    fn test_noauth_new() {
        let a = NoAuth::new("http://127.0.0.1:8080/v1").unwrap();
        let e = a.endpoint;
        assert_eq!(e.scheme(), "http");
        assert_eq!(e.host_str().unwrap(), "127.0.0.1");
        assert_eq!(e.port().unwrap(), 8080u16);
        assert_eq!(e.path(), "/v1");
    }

    #[test]
    fn test_noauth_new_fail() {
        NoAuth::new("foo bar").err().unwrap();
    }

    #[test]
    fn test_noauth_get_endpoint() {
        let a = NoAuth::new("http://127.0.0.1:8080/v1").unwrap();
        let e = a.get_endpoint(String::from("foobar"), None).unwrap();
        assert_eq!(e.scheme(), "http");
        assert_eq!(e.host_str().unwrap(), "127.0.0.1");
        assert_eq!(e.port().unwrap(), 8080u16);
        assert_eq!(e.path(), "/v1");
    }
}