// 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::registry::EntityRegistry;
use settled_reach_server::knowledge::{KnowledgeGraph, KnowledgePlugin};
use settled_reach_server::npc::relationships::{RelationshipEdge, RelationshipGraph};
use settled_reach_server::npc::{
    Contentment, DailyRoutine, Npc, NpcPlugin, RelationshipKind, RoutineEntry, ToleranceThreshold,
    Want, WantKind,
};
use settled_reach_server::perception::vision_cone::Facing;
use settled_reach_server::simulation::interaction::NearbyInteractionBuffer;
use settled_reach_server::simulation::movement::{PlayerCharacter, TilePosition, WalkabilityMap};
use settled_reach_server::simulation::path_follow::MovementSpeed;
use settled_reach_server::simulation::time::DayPhase;
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.add_plugins(NpcPlugin);
    app.insert_resource(BridgeResource::new(bridge));
    app.insert_resource(WalkabilityMap::new(32, 32, 1));

    // Proof room: wall at (16,14) between player and NPC 1
    {
        let mut wm = app.world_mut().resource_mut::<WalkabilityMap>();
        wm.set_walkable(&TilePosition::new(16, 14, 0), false);
    }

    let mut registry = EntityRegistry::new(0);

    // Player at (16,16)
    let player = app
        .world_mut()
        .spawn((
            PlayerCharacter,
            TilePosition::new(16, 16, 0),
            Facing::default(),
            KnowledgeGraph::new(),
            NearbyInteractionBuffer::default(),
        ))
        .id();
    registry.register(player);

    // NPC 1: Dock worker at (16,13) — behind wall, full routine
    let npc1 = app
        .world_mut()
        .spawn((
            Npc,
            TilePosition::new(16, 13, 0),
            Want {
                primary: WantKind::Wealth,
                intensity: 6,
                description: "Wants a bigger share of docking fees".into(),
            },
            DailyRoutine {
                entries: vec![
                    RoutineEntry {
                        phase: DayPhase::Morning,
                        location: TilePosition::new(16, 13, 0),
                        activity: "Prep cargo bay".into(),
                    },
                    RoutineEntry {
                        phase: DayPhase::Afternoon,
                        location: TilePosition::new(20, 10, 0),
                        activity: "Unload freight".into(),
                    },
                    RoutineEntry {
                        phase: DayPhase::Evening,
                        location: TilePosition::new(10, 20, 0),
                        activity: "Drink at canteen".into(),
                    },
                    RoutineEntry {
                        phase: DayPhase::Night,
                        location: TilePosition::new(16, 13, 0),
                        activity: "Sleep in bunk".into(),
                    },
                ],
                description: "Dock worker shift pattern".into(),
            },
            Contentment { level: 20 },
            ToleranceThreshold {
                current_stress: 30,
                threshold: 70,
            },
            MovementSpeed::new(2),
        ))
        .id();
    let npc1_sid = registry.register(npc1);

    // NPC 2: Field tech at (14,18) — visible to player, has routine
    let npc2 = app
        .world_mut()
        .spawn((
            Npc,
            TilePosition::new(14, 18, 0),
            Want {
                primary: WantKind::Knowledge,
                intensity: 8,
                description: "Obsessed with pre-Collapse sensor arrays".into(),
            },
            DailyRoutine {
                entries: vec![
                    RoutineEntry {
                        phase: DayPhase::Morning,
                        location: TilePosition::new(14, 18, 0),
                        activity: "Calibrate instruments".into(),
                    },
                    RoutineEntry {
                        phase: DayPhase::Afternoon,
                        location: TilePosition::new(22, 22, 0),
                        activity: "Field survey".into(),
                    },
                ],
                description: "Field tech survey pattern".into(),
            },
            Contentment { level: 45 },
            ToleranceThreshold {
                current_stress: 10,
                threshold: 60,
            },
            MovementSpeed::default(),
        ))
        .id();
    let npc2_sid = registry.register(npc2);

    // NPC 3: Guard at (18,14) — stationary, no routine
    let npc3 = app
        .world_mut()
        .spawn((
            Npc,
            TilePosition::new(18, 14, 0),
            Want {
                primary: WantKind::Safety,
                intensity: 4,
                description: "Wants a quiet shift".into(),
            },
            Contentment { level: -5 },
            ToleranceThreshold {
                current_stress: 45,
                threshold: 55,
            },
        ))
        .id();
    let npc3_sid = registry.register(npc3);

    // Populate RelationshipGraph with a few edges
    {
        let mut rel_graph = app.world_mut().resource_mut::<RelationshipGraph>();
        // Dock worker and guard are colleagues with moderate trust
        rel_graph.set_relationship(
            npc1_sid,
            npc3_sid,
            RelationshipEdge {
                kind: RelationshipKind::Colleague,
                trust: 3,
                history: vec![],
                last_interaction_tick: 0,
            },
        );
        // Guard distrusts the field tech (rival for resources)
        rel_graph.set_relationship(
            npc3_sid,
            npc2_sid,
            RelationshipEdge {
                kind: RelationshipKind::Rival,
                trust: -4,
                history: vec![],
                last_interaction_tick: 0,
            },
        );
    }

    app.insert_resource(registry);

    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");
}