use std::{collections::HashMap, thread};

use chrono::{prelude::*, Duration};
use mediawiki::api_sync::ApiSync};

static ISO_8601_FMT: &str = "%Y-%m-%dT%H:%M:%SZ";

fn make_map(params: &[(&str, &str)]) -> HashMap<String, String> {
    params.iter().map(|(k, v)| (k.to_string(), v.to_string())).collect()
}

fn main() {
    let time_90_days_ago = Utc::now() - Duration::days(90);
    let time_str = time_90_days_ago.format(ISO_8601_FMT).to_string();

    for level in &["1", "2", "3", "4", "N"] {
        println!("== sco-{} ==", level);
        let category = format!("Category:User sco-{}", level);
        let users_query = make_map(&[
            ("action", "query"),
            ("list", "categorymembers"),
            ("cmtitle", &category),
            ("cmprop", "title"),
            ("cmnamespace", "2"), // user
        ]);
        let mut api = ApiSync::new("https://en.wikipedia.org/w/api.php").unwrap();
        api.set_user_agent("QueryActiveUsers/0.1 (https://en.wikipedia.org/wiki/User:Enterprisey) mediawiki_rs/0.2.0");
        let users = api.get_query_api_json_limit_iter(&users_query, None)
            .map(|user| user.unwrap())
            .filter_map(|user| user["query"]["categorymembers"][0]["title"].as_str().map(ToString::to_string));
        for user in users {
            let user = user.split_terminator('/').next().unwrap();
            let contribs_query = make_map(&[
                ("action", "query"),
                ("list", "usercontribs"),
                ("ucuser", &user),
                ("uclimit", "1"),
                ("ucprop", "timestamp"),
                ("ucend", &time_str),
            ]);
            let contribs = api.get_query_api_json_all(&contribs_query).unwrap();
            let contribs = contribs["query"]["usercontribs"].as_array().unwrap();
            if let Some(t) = contribs.get(0) {
                println!("* {{{{user|{}}}}} {}", user, t["timestamp"].as_str().unwrap().split_terminator('T').next().unwrap());
            }
            thread::sleep(std::time::Duration::from_millis(500));
        }
    }
}