// The Settled Reach - Simulation Server
// Entry point for standalone simulation binary

use bevy_app::prelude::*;
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};

use settled_reach_server::bridge::tcp::TcpBridge;
use settled_reach_server::bridge::{BridgePlugin, BridgeResource, ServerRunning};
use settled_reach_server::knowledge::{KnowledgeGraph, KnowledgePlugin};
use settled_reach_server::perception::vision_cone::Facing;
use settled_reach_server::simulation::movement::{PlayerCharacter, TilePosition, WalkabilityMap};
use settled_reach_server::simulation::SimulationPlugin;

fn main() {
    // Initialize tracing subscriber for logging
    tracing_subscriber::registry()
        .with(
            tracing_subscriber::EnvFilter::try_from_default_env()
                .unwrap_or_else(|_| "settled_reach_server=debug".into()),
        )
        .with(tracing_subscriber::fmt::layer())
        .init();

    let addr = std::env::args()
        .nth(1)
        .or_else(|| std::env::var("SR_ADDR").ok())
        .unwrap_or_else(|| "127.0.0.1:9876".to_string());

    tracing::info!("The Settled Reach - Simulation Server starting");
    tracing::info!("Waiting for client connection on {}", addr);

    let bridge = TcpBridge::accept(&addr).unwrap_or_else(|e| {
        tracing::error!("Failed to accept client connection on {}: {}", addr, e);
        std::process::exit(1);
    });
    tracing::info!("Client connected, initializing simulation");

    // Create the bevy App and add plugins
    let mut app = App::new();
    app.add_plugins(SimulationPlugin);
    app.add_plugins(BridgePlugin);
    app.add_plugins(KnowledgePlugin);
    app.insert_resource(BridgeResource::new(bridge));
    app.insert_resource(WalkabilityMap::new(32, 32, 1));
    app.world_mut().spawn((
        PlayerCharacter,
        TilePosition::new(16, 16, 0),
        Facing::default(),
        KnowledgeGraph::new(),
    ));

    tracing::info!("Simulation initialized, entering game loop");

    // Game loop: run until client disconnects
    loop {
        app.update();
        // Check ServerRunning resource
        if !app.world().resource::<ServerRunning>().0 {
            break;
        }
    }

    tracing::info!("Simulation server shutting down");
}