first commit

components/iotPanel/chillFactor.ts

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+export const CHICKEN_CHILL_FACTOR_POINTS = [
+  { age: 0, factor: 8 },
+  { age: 1, factor: 8 },
+  { age: 7, factor: 7 },
+  { age: 14, factor: 6 },
+  { age: 21, factor: 4.5 },
+  { age: 28, factor: 3.5 },
+  { age: 35, factor: 3.5 },
+  { age: 42, factor: 3 },
+] as const;
+
+export function chickenChillFactorFromAge(day: number | null | undefined): number | null {
+  const age = Number(day);
+  if (!Number.isFinite(age) || age < 0) return null;
+
+  const firstPoint = CHICKEN_CHILL_FACTOR_POINTS[0]!;
+  if (age <= firstPoint.age) return firstPoint.factor;
+
+  for (let idx = 1; idx < CHICKEN_CHILL_FACTOR_POINTS.length; idx += 1) {
+    const previousPoint = CHICKEN_CHILL_FACTOR_POINTS[idx - 1]!;
+    const nextPoint = CHICKEN_CHILL_FACTOR_POINTS[idx]!;
+    if (age > nextPoint.age) continue;
+
+    const ageRange = nextPoint.age - previousPoint.age;
+    if (ageRange <= 0) return nextPoint.factor;
+
+    const progress = (age - previousPoint.age) / ageRange;
+    return previousPoint.factor + (nextPoint.factor - previousPoint.factor) * progress;
+  }
+
+  return CHICKEN_CHILL_FACTOR_POINTS[CHICKEN_CHILL_FACTOR_POINTS.length - 1]!.factor;
+}
+
+export type ExperienceCalc = {
+  averageTemp: number | null;
+  windSpeed: number | null;
+  humidity: number | null;
+  humidityAdjustment: number | null;
+  chillFactor: number | null;
+  chillEffect: number | null;
+  experienceTemp: number | null;
+};
+
+export function computeExperienceCalc(args: {
+  averageTemp: number | null | undefined;
+  windSpeed: number | null | undefined;
+  humidity: number | null | undefined;
+  dayAge: number | null | undefined;
+}): ExperienceCalc {
+  const toNumber = (value: number | null | undefined): number | null =>
+    value != null && Number.isFinite(Number(value)) ? Number(value) : null;
+
+  const averageTemp = toNumber(args.averageTemp);
+  const windSpeed = toNumber(args.windSpeed);
+  const humidity = toNumber(args.humidity);
+  const chillFactor = chickenChillFactorFromAge(args.dayAge);
+  const humidityAdjustment = humidity === null ? null : (humidity - 70) / 5;
+  const chillEffect =
+    windSpeed !== null && chillFactor !== null && humidityAdjustment !== null
+      ? windSpeed * chillFactor - humidityAdjustment
+      : null;
+  const experienceTemp =
+    averageTemp !== null && chillEffect !== null ? averageTemp - chillEffect : null;
+
+  return {
+    averageTemp,
+    windSpeed,
+    humidity,
+    humidityAdjustment,
+    chillFactor,
+    chillEffect,
+    experienceTemp,
+  };
+}
+
+export function formatChillFactor(value: number | null | undefined): string {
+  if (value === null || value === undefined || !Number.isFinite(Number(value))) return '--';
+  return Number(value).toFixed(3).replace('.', ',').replace(/0+$/, '').replace(/,$/, '');
+}