"use strict";

// Layer: simulation/system-environment
// Owns frame time, world clock, frame signals, weather/terrain preparation,
// phase-change notification, and diagnostics publication.
(function (global) {
  function normalizeDelta(worldRef, dt) {
    if (!worldRef || worldRef.paused) return null;
    let frameDt = dt * worldRef.speed;
    frameDt = Math.min(frameDt, 0.12 * worldRef.speed);
    return frameDt;
  }

  function updateClock(worldRef, dt) {
    const prevTime = worldRef.time;
    worldRef.time += dt;
    const previousDay = worldRef.day || 1;
    worldRef.day = Math.floor(worldRef.time / CONFIG.dayLength) + 1;
    const prevHour = worldRef.hourOfDay ? worldRef.hourOfDay(prevTime) : 0;
    const nowHour = worldRef.hourOfDay ? worldRef.hourOfDay(worldRef.time) : 0;
    const crossedColonyEvalHour = (worldRef.day !== previousDay) ? (nowHour >= 6) : (prevHour < 6 && nowHour >= 6);
    const pendingColonyMoodEvaluation = crossedColonyEvalHour && worldRef.lastColonyMoodDay !== worldRef.day;
    if (worldRef.day !== previousDay) {
      for (const t of worldRef.tarinai || []) if (t) t.personalityDaily = { day: worldRef.day, total: 0, byKey: {}, byCause: {} };
    }
    return { prevTime, previousDay, prevHour, nowHour, crossedColonyEvalHour, pendingColonyMoodEvaluation };
  }

  function updateFrameSignals(worldRef, dt) {
    if (worldRef.pointer) worldRef.pointer.motion = Math.max(0, (worldRef.pointer.motion || 0) - dt * 2.4);
    worldRef.shakeTimer = Math.max(0, (worldRef.shakeTimer || 0) - dt);
    if ((worldRef.shakeTimer || 0) <= 0) { worldRef.shakeDuration = 0; worldRef.shakeStrength = 0; }
  }

  function updateEnvironment(worldRef, dt) {
    worldRef.updateWeather(dt);
    worldRef.foodSpoilagePenalty = Math.max(0, (worldRef.foodSpoilagePenalty || 0) - dt * 0.010);
    worldRef.updateTerrainDirtyState?.(dt);
  }

  function prepareSpatialFrame(worldRef) {
    worldRef.spatialRebuildsThisFrame = 0;
    worldRef.spatialDirtyMarksThisFrame = 0;
    worldRef.ensureSpatial?.("update-start");
    worldRef.beginFramePerformanceBudgets?.();
  }

  function emitPhaseChange(worldRef) {
    const phase = worldRef.phaseName();
    if (phase !== worldRef.lastPhase) {
      worldRef.lastPhase = phase;
      worldRef.emit("world:phase", { world: worldRef, phase });
    }
  }

  function finalizeDiagnostics(worldRef) {
    worldRef.lastRuntimeDiagnostics = worldRef.runtimeDiagnostics?.() || null;
  }

  const phases = Object.freeze({
    normalizeDelta,
    updateClock,
    updateFrameSignals,
    updateEnvironment,
    prepareSpatialFrame,
    emitPhaseChange,
    finalizeDiagnostics,
  });

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