// Sector quality drifts toward a target set by the budget ratio (alloc / need).
// Each sector has its own time constant: police reacts in weeks, infrastructure in years.

import { clamp, qualityFromRatio } from "./state.js";
import { biasFor } from "./modifiers.js";

export function stepSectors(state, bal, fiscal) {
  const s = bal.sector;
  for (const [id, sec] of Object.entries(state.sectors)) {
    // Needs grow with population, ageing and prices: standing still buys less each year.
    sec.need *= Math.pow(1 + (bal.needGrowth?.[id] ?? 0), 1 / 365);
    let target = qualityFromRatio(sec.alloc / sec.need, bal) + biasFor(state, "sector", id);
    if (id === "industry" && fiscal.debtRatio > s.industryDebtPenaltyFrom) {
      target -= s.industryDebtPenaltyPerPoint * (fiscal.debtRatio - s.industryDebtPenaltyFrom);
    }
    sec.quality = clamp(sec.quality + (clamp(target, 0, 100) - sec.quality) / bal.sectorTau[id], 0, 100);
  }
}