"use strict";

// Layer: simulation/system-order
// Names the update order in one place. Prefer concrete simulation systems,
// with the phase facade kept as a stable named entry point.
(function (global) {
  function phase(name) {
    return global.TarinaiSimulationSystems.phases?.[name] || null;
  }

  const SYSTEM_ORDER = Object.freeze([
    { id: "clock", run(worldRef, ctx) { phase("updateClock")?.(worldRef, ctx.dt); } },
    { id: "frame_signals", run(worldRef, ctx) { phase("updateFrameSignals")?.(worldRef, ctx.dt); } },
    { id: "environment", run(worldRef, ctx) { phase("updateEnvironment")?.(worldRef, ctx.dt); } },
    { id: "spatial_prepare", run(worldRef) { phase("prepareSpatialFrame")?.(worldRef); } },
    { id: "items_and_ants", run(worldRef, ctx) { ctx.mobile = phase("updateItemsAndAnts")?.(worldRef, ctx.dt) || null; } },
    { id: "effects", run(worldRef, ctx) { phase("updateEffects")?.(worldRef, ctx.dt); } },
    { id: "creatures", run(worldRef, ctx) { phase("updateCreatures")?.(worldRef, ctx.dt); } },
    { id: "seesaws", run(worldRef, ctx) { global.TarinaiSeesawSystem?.updateWorld?.(worldRef, ctx.dt); } },
    { id: "maintenance", run(worldRef, ctx) { phase("runMaintenance")?.(worldRef, ctx.dt, ctx.mobile?.itemCountBefore ?? (worldRef.items || []).length); } },
    { id: "phase_events", run(worldRef) { phase("emitPhaseChange")?.(worldRef); } },
    { id: "ambient_tarinai", run(worldRef, ctx) { phase("spawnAmbientTarinai")?.(worldRef, ctx.dt); } },
    { id: "ambient_grass", run(worldRef, ctx) { phase("spawnAmbientGrass")?.(worldRef, ctx.dt); } },
    { id: "rain_water", run(worldRef, ctx) { phase("spawnRainWater")?.(worldRef, ctx.dt); } },
    { id: "diagnostics", run(worldRef) { phase("finalizeDiagnostics")?.(worldRef); } },
  ]);

  function update(worldRef, dt) {
    const normalize = phase("normalizeDelta");
    if (!normalize) throw new Error("Tarinai simulation normalize phase is not available");
    const frameDt = normalize(worldRef, dt);
    if (frameDt === null) return;
    const ctx = { dt: frameDt, mobile: null };
    const profiler = global.TarinaiPerf;
    for (const system of SYSTEM_ORDER) {
      const end = profiler.begin(`update.phase.${system.id}`) || null;
      try {
        system.run(worldRef, ctx);
      } finally {
        if (end) end();
      }
    }
  }

  global.TarinaiSystemOrder = Object.freeze({ update });
})(typeof window !== "undefined" ? window : globalThis);