/*
    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2025 metamuffin <metamuffin.org>
*/

use reqwest::{
    header::{HeaderMap, HeaderName, HeaderValue},
    Client, ClientBuilder,
};
use std::sync::Arc;
use tokio::sync::Semaphore;
use crate::USER_AGENT;

pub struct MusicBrainz {
    client: Client,
    key: String,
    rate_limit: Arc<Semaphore>,
}

impl MusicBrainz {
    pub fn new(api_key: &str) -> Self {
        let client = ClientBuilder::new()
            .default_headers(HeaderMap::from_iter([
                (
                    HeaderName::from_static("accept"),
                    HeaderValue::from_static("application/json"),
                ),
                (
                    HeaderName::from_static("user-agent"),
                    HeaderValue::from_static(USER_AGENT),
                ),
            ]))
            .build()
            .unwrap();
        Self {
            client,
            // send at most 1 req/s according to musicbrainz docs, each lock is held for 10s
            // this implementation also never sends more than 10 requests in-flight.
            rate_limit: Arc::new(Semaphore::new(10)),
            key: api_key.to_owned(),
        }
    }
}