//! Economy phase plugin — tâtonnement simulation tick and IPC query serving.
//!
//! All systems run in [`TickPhase::Economy`]. Intra-phase ordering:
//! - tick_economy_simulation → serve_econ_state_query (query reads fresh signals)

use bevy_app::prelude::*;
use bevy_ecs::schedule::IntoScheduleConfigs;

use crate::tick_phases::TickPhase;

pub struct EconomyPlugin {
    /// World seed from `StartupMessage` (#826). Passed to `try_load_economy` so the
    /// tâtonnement simulation is seeded deterministically from the client's world seed.
    pub seed: u64,
}

impl Plugin for EconomyPlugin {
    fn build(&self, app: &mut App) {
        // Economy simulation (#821, D-031) — loaded once at startup, no-op when DB absent.
        // Seed comes from StartupMessage.world_seed, threaded via SimulationPlugin (#826).
        if let Some((econ_sim, econ_state)) = super::economy::try_load_economy(self.seed) {
            app.insert_resource(econ_sim).insert_resource(econ_state);
        }
        // EconQueryBuffer: always registered so EconStateQuery PlayerActions are accepted
        // even when the economy DB is absent (queries just produce no response).
        app.init_resource::<super::economy::EconQueryBuffer>()
            .add_systems(
                Update,
                (
                    super::economy::tick_economy_simulation,
                    super::economy::serve_econ_state_query
                        .after(super::economy::tick_economy_simulation),
                )
                    .in_set(TickPhase::Economy),
            );
    }
}