// SPDX-FileCopyrightText: 2022 Matteo Settenvini <matteo.settenvini@montecristosoftware.eu>
// SPDX-License-Identifier: AGPL-3.0-or-later

use {
    crate::config::Config, crate::constants, anyhow::anyhow,
    base64::write::EncoderWriter as Base64Encoder, reqwest::Url, std::io::Write,
};

pub struct ApiClient {
    pub base_url: Url,
    pub username: String,
    pub rest: reqwest::Client,
}

impl ApiClient {
    pub fn new(server_name: &str, configuration: &Config) -> anyhow::Result<Self> {
        let server = configuration
            .credentials
            .servers
            .get(server_name)
            .ok_or_else(|| {
                anyhow!(
                    "Unknown server {}. Did you use '{} init' first? Known servers: {:#?}",
                    server_name,
                    env!("CARGO_BIN_NAME"),
                    configuration.credentials.servers.keys().collect::<Vec<_>>()
                )
            })?;

        use reqwest::header;
        let mut default_headers = header::HeaderMap::new();
        let mut auth_header = b"Basic ".to_vec();
        {
            let mut encoder = Base64Encoder::new(&mut auth_header, base64::STANDARD);
            write!(encoder, "{}:{}", server.login_name, server.password).unwrap();
        }
        let mut auth_header = header::HeaderValue::from_bytes(&auth_header)?;
        auth_header.set_sensitive(true);
        default_headers.insert(header::AUTHORIZATION, auth_header);

        let rest_client = reqwest::Client::builder()
            .user_agent(constants::USER_AGENT)
            .default_headers(default_headers)
            .build()?;

        Ok(ApiClient {
            base_url: Url::parse(&server.url)?,
            username: server.login_name.clone(),
            rest: rest_client,
        })
    }
}