import { describe, expect, it } from "vitest";

import { getEffectiveHourlyWeatherCode, getForecastConditionKey, isForecastNight } from "@/lib/forecast-utils";

describe("forecast utilities", () => {
  it("promotes dry weather code to rain when precipitation probability is high", () => {
    expect(
      getEffectiveHourlyWeatherCode({
        weatherCode: 0,
        precipitation: 0,
        precipitationProbability: 100,
      }),
    ).toBe(61);
  });

  it("keeps clear weather code when there is no precipitation signal", () => {
    expect(
      getEffectiveHourlyWeatherCode({
        weatherCode: 0,
        precipitation: 0,
        precipitationProbability: 10,
      }),
    ).toBe(0);
  });

  it("recognizes night hours from sunrise and sunset", () => {
    const day = {
      sunrise: "2026-06-15T05:00",
      sunset: "2026-06-15T21:00",
    };

    expect(isForecastNight("2026-06-15T03:00", day)).toBe(true);
    expect(isForecastNight("2026-06-15T12:00", day)).toBe(false);
    expect(isForecastNight("2026-06-15T22:00", day)).toBe(true);
  });

  it("maps storm and rain weather codes to condition keys", () => {
    expect(getForecastConditionKey(61)).toBe("forecast.condition.rain");
    expect(getForecastConditionKey(95)).toBe("forecast.condition.thunderstorm");
  });
});