// Before running this, run:
// 1. rdsys
// 2. lox-distributor
// 3. troll-patrol with the feature "simulation"

use troll_patrol::{
    extra_info::ExtraInfo,
    increment_simulated_date,
    simulation::{bridge::Bridge, censor::Censor, extra_infos_server, state::State, user::User},
};

use clap::Parser;
use lox_cli::{networking::*, *};
use rand::Rng;
use serde::Deserialize;
use std::{
    collections::{HashMap, HashSet},
    fs::File,
    io::BufReader,
    path::PathBuf,
};
use tokio::spawn;

#[derive(Parser, Debug)]
#[command(author, version, about, long_about = None)]
struct Args {
    /// Name/path of the configuration file
    #[arg(short, long, default_value = "simulation_config.json")]
    config: PathBuf,
}

#[derive(Debug, Deserialize)]
pub struct Config {
    pub la_port: u16,
    pub la_test_port: u16,
    pub tp_port: u16,
    pub tp_test_port: u16,
    pub min_new_users_per_day: u32,
    pub max_new_users_per_day: u32,
    // How many days to simulate
    pub num_days: u32,
    pub prob_connection_fails: f64,
    pub prob_friend_in_same_country: f64,
    pub prob_user_invites_friend: f64,
    pub prob_user_is_censor: f64,
    pub prob_user_submits_reports: f64,
    pub probs_user_in_country: Vec<(String, f64)>,
    pub sharing: bool,
}

#[tokio::main]
pub async fn main() {
    let args: Args = Args::parse();

    let config: Config = serde_json::from_reader(BufReader::new(
        File::open(&args.config).expect("Could not read config file"),
    ))
    .expect("Reading config file from JSON failed");

    let la_net = HyperNet {
        hostname: format!("http://localhost:{}", config.la_port),
    };
    let la_net_test = HyperNet {
        hostname: format!("http://localhost:{}", config.la_test_port),
    };
    let tp_net = HyperNet {
        hostname: format!("http://localhost:{}", config.tp_port),
    };
    let tp_net_test = HyperNet {
        hostname: format!("http://localhost:{}", config.tp_test_port),
    };
    let extra_infos_net = HyperNet {
        hostname: "http://localhost:8003".to_string(),
    };

    let la_pubkeys = get_lox_auth_keys(&la_net).await;

    let state = State {
        la_net,
        tp_net,
        la_pubkeys,
        prob_connection_fails: config.prob_connection_fails,
        prob_friend_in_same_country: config.prob_friend_in_same_country,
        prob_user_invites_friend: config.prob_user_invites_friend,
        prob_user_is_censor: config.prob_user_is_censor,
        prob_user_submits_reports: config.prob_user_submits_reports,
        probs_user_in_country: config.probs_user_in_country,
        sharing: config.sharing,
    };

    let mut rng = rand::thread_rng();

    // Set up censors
    let mut censors = HashMap::<String, Censor>::new();

    // Set up bridges (no bridges yet)
    let mut bridges = HashMap::<[u8; 20], Bridge>::new();

    // Set up users (no users yet)
    let mut users = Vec::<User>::new();

    // Set up extra-infos server
    spawn(async move {
        extra_infos_server::server().await;
    });

    // Main loop
    for _ in 0..config.num_days {
        // USER TASKS

        // Add some new users
        let num_new_users: u32 =
            rng.gen_range(config.min_new_users_per_day..=config.max_new_users_per_day);
        for _ in 0..num_new_users {
            users.push(User::new(&state).await);
        }

        let mut new_users = Vec::<User>::new();

        // Users do daily actions
        for user in &mut users {
            // TODO: Refactor out connections from return
            let (mut invited_friends, _connections) =
                user.daily_tasks(&state, &mut bridges, &mut censors).await;

            // If this user invited any friends, add them to the list of users
            new_users.append(&mut invited_friends);
        }

        // Add new users
        users.append(&mut new_users);

        // CENSOR TASKS
        for (_, censor) in censors.iter_mut() {
            censor.end_of_day_tasks(&state, &mut bridges).await;
        }

        // BRIDGE TASKS
        let mut new_extra_infos = HashSet::<ExtraInfo>::new();
        for (_, bridge) in bridges.iter_mut() {
            // Bridge reports its connections for the day
            new_extra_infos.insert(bridge.gen_extra_info());

            // Bridge resets for tomorrow
            bridge.reset_for_tomorrow();
        }

        // Publish all the bridges' extra-infos for today
        extra_infos_net
            .request(
                "/add".to_string(),
                serde_json::to_string(&new_extra_infos).unwrap().into(),
            )
            .await;

        // TROLL PATROL TASKS
        let new_blockages_resp = tp_net_test.request("/update".to_string(), vec![]).await;
        let new_blockages: HashMap<String, HashSet<String>> =
            serde_json::from_slice(&new_blockages_resp).unwrap();

        // TODO: Track stats about new blockages

        // LOX AUTHORITY TASKS

        // Advance LA's time to tomorrow
        la_net_test
            .request(
                "/advancedays".to_string(),
                serde_json::to_string(&(1 as u16)).unwrap().into(),
            )
            .await;

        // SIMULATION TASKS

        // Advance simulated time to tomorrow
        increment_simulated_date();
    }
}