use axum::{response::Html, routing::get, Router};
use std::{
    collections::HashSet,
    sync::{Arc, Mutex},
};
use std::{error::Error, fs, result::Result};
use tokio::sync::broadcast;
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};

pub mod gamemaster;
use crate::gamemaster::*;

pub mod api;
use crate::api::*;

/// Parse json for card data
fn load_json(path: &str) -> Result<Vec<CAHCardSet>, Box<dyn Error>> {
    let data: String = fs::read_to_string(path).expect("Error reading file");
    let jayson: Vec<CAHCardSet> = serde_json::from_str(&data)?;

    Ok(jayson)
}

#[allow(dead_code)]
fn test() -> Result<(), Box<dyn Error>> {
    // choose decks
    let cards_input_path: &str = "data/cah-cards-full.json";

    // TODO: this should be a master card database and pointers
    // to the cards should be passed to the game instead of actual cards
    let chosen_packs: Vec<CAHCardSet> = load_json(cards_input_path)?;
    println!("{}", &chosen_packs.len());

    let test_player0 = CAHPlayer {
        name: "Adam".to_string(),
        role: PlayerRole::Host,
        white: vec![],
        black: vec![],
    };

    let test_player1 = CAHPlayer {
        name: "Ferris".to_string(),
        role: PlayerRole::Player,
        white: vec![],
        black: vec![],
    };

    // make some games
    // use hashmap?
    let mut games: Vec<CAHGame> = vec![];

    // create game with/for player 0
    let test_game0 = NewGameRequest {
        name: "Test0".to_string(),
        host: test_player0,
        // packs: chosen_packs,
        packs: vec![0],
    };

    games.push(CAHGame::new(test_game0)?);

    // a new game request struct but this player is a player
    games[0].create_player(test_player1)?;

    // start round
    games[0].game_start()?;

    println!("----------------------");
    for card in &games[0].players[0].white {
        println!("{}", card.text);
    }
    Ok(())
}

// Our shared state
pub struct AppState {
    // We require unique usernames. This tracks which usernames have been taken.
    user_set: Mutex<HashSet<String>>,
    // Channel used to send messages to all connected clients.
    tx: broadcast::Sender<String>,
    // Master card decks
    all_cards: Mutex<Vec<CAHCardSet>>,
    // Games list
    games: Mutex<Vec<CAHGame>>,
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    tracing_subscriber::registry()
        .with(
            tracing_subscriber::EnvFilter::try_from_default_env()
                .unwrap_or_else(|_| "cards=trace".into()),
        )
        .with(tracing_subscriber::fmt::layer())
        .init();

    // Set up application state for use with with_state().
    let user_set = Mutex::new(HashSet::new());
    let (tx, _rx) = broadcast::channel(100);

    // choose decks
    let cards_input_path: &str = "data/cah-cards-full.json";

    // TODO: this should be a master card database and pointers
    // to the cards should be passed to the game instead of actual cards
    let all_cards = Mutex::new(load_json(cards_input_path)?);
    let games = Mutex::new(vec![]);
    let app_state = Arc::new(AppState {
        user_set,
        tx,
        all_cards,
        games,
    });

    let app = Router::new()
        .route("/", get(index))
        .route("/test", get(spawnclients))
        .route("/websocket", get(websocket_handler))
        .with_state(app_state);

    let listener = tokio::net::TcpListener::bind("0.0.0.0:3030").await?;
    tracing::debug!("listening on {}", listener.local_addr()?);
    axum::serve(listener, app).await?;

    Ok(())
}

// Include utf-8 file at **compile** time.
async fn index() -> Html<&'static str> {
    Html(std::include_str!("../test_client.html"))
}

async fn spawnclients() -> Html<&'static str> {
    Html(std::include_str!("../spawnclients.html"))
}