import { mount, config } from "@vue/test-utils";
import { describe, expect, test, vi } from "vite-plus/test";
import formatter, { POWER_UNIT } from "./formatter";
import * as units from "../units";
import { defineComponent } from "vue";
import { CURRENCY } from "@/types/evcc";

const is12hSpy = vi.spyOn(units, "is12hFormat").mockReturnValue(false);

config.global.mocks["$i18n"] = { locale: "de" };
config.global.mocks["$t"] = (a: string) => a;

const fmt = mount(
  defineComponent({
    mixins: [formatter],
    render() {
      return null;
    },
  })
).vm;

describe("fmtW", () => {
  test("should format with units", () => {
    expect(fmt.fmtW(0, POWER_UNIT.AUTO)).eq("0,0 kW");
    expect(fmt.fmtW(1200000, POWER_UNIT.AUTO)).eq("1.200,0 kW");
    expect(fmt.fmtW(0, POWER_UNIT.MW)).eq("0,0 MW");
    expect(fmt.fmtW(1200000, POWER_UNIT.MW)).eq("1,2 MW");
    expect(fmt.fmtW(0, POWER_UNIT.KW)).eq("0,0 kW");
    expect(fmt.fmtW(1200000, POWER_UNIT.KW)).eq("1.200,0 kW");
    expect(fmt.fmtW(0, POWER_UNIT.W)).eq("0 W");
    expect(fmt.fmtW(1200000, POWER_UNIT.W)).eq("1.200.000 W");
  });
  test("should format without units", () => {
    expect(fmt.fmtW(0, POWER_UNIT.AUTO, false)).eq("0,0");
    expect(fmt.fmtW(1200000, POWER_UNIT.AUTO, false)).eq("1.200,0");
    expect(fmt.fmtW(0, POWER_UNIT.MW, false)).eq("0,0");
    expect(fmt.fmtW(1200000, POWER_UNIT.MW, false)).eq("1,2");
    expect(fmt.fmtW(0, POWER_UNIT.KW, false)).eq("0,0");
    expect(fmt.fmtW(1200000, POWER_UNIT.KW, false)).eq("1.200,0");
    expect(fmt.fmtW(0, POWER_UNIT.W, false)).eq("0");
    expect(fmt.fmtW(1200000, POWER_UNIT.W, false)).eq("1.200.000");
  });
  test("should format a given number of digits", () => {
    expect(fmt.fmtW(12345, POWER_UNIT.AUTO, true, 0)).eq("12 kW");
    expect(fmt.fmtW(12345, POWER_UNIT.AUTO, true, 1)).eq("12,3 kW");
    expect(fmt.fmtW(12345, POWER_UNIT.AUTO, true, 2)).eq("12,35 kW");
    expect(fmt.fmtW(12345, POWER_UNIT.MW, true, 0)).eq("0 MW");
    expect(fmt.fmtW(12345, POWER_UNIT.MW, true, 1)).eq("0,0 MW");
    expect(fmt.fmtW(12345, POWER_UNIT.MW, true, 2)).eq("0,01 MW");
    expect(fmt.fmtW(12345, POWER_UNIT.KW, true, 0)).eq("12 kW");
    expect(fmt.fmtW(12345, POWER_UNIT.KW, true, 1)).eq("12,3 kW");
    expect(fmt.fmtW(12345, POWER_UNIT.KW, true, 2)).eq("12,35 kW");
    expect(fmt.fmtW(12345, POWER_UNIT.W, true, 0)).eq("12.345 W");
    expect(fmt.fmtW(12345, POWER_UNIT.W, true, 1)).eq("12.345,0 W");
    expect(fmt.fmtW(12345, POWER_UNIT.W, true, 2)).eq("12.345,00 W");
  });
});

describe("getPowerUnit", () => {
  test("should pick unit based on largest value", () => {
    expect(fmt.getPowerUnit(0)).eq(POWER_UNIT.W);
    expect(fmt.getPowerUnit(999)).eq(POWER_UNIT.W);
    expect(fmt.getPowerUnit(1000)).eq(POWER_UNIT.KW);
    expect(fmt.getPowerUnit(9_999_999)).eq(POWER_UNIT.KW);
    expect(fmt.getPowerUnit(10_000_000)).eq(POWER_UNIT.MW);
  });
});

describe("fmtWh", () => {
  test("should format with units", () => {
    expect(fmt.fmtWh(0, POWER_UNIT.AUTO)).eq("0,0 kWh");
    expect(fmt.fmtWh(1200000, POWER_UNIT.AUTO)).eq("1.200,0 kWh");
    expect(fmt.fmtWh(0, POWER_UNIT.MW)).eq("0,0 MWh");
    expect(fmt.fmtWh(1200000, POWER_UNIT.MW)).eq("1,2 MWh");
    expect(fmt.fmtWh(0, POWER_UNIT.KW)).eq("0,0 kWh");
    expect(fmt.fmtWh(1200000, POWER_UNIT.KW)).eq("1.200,0 kWh");
    expect(fmt.fmtWh(0, POWER_UNIT.W)).eq("0 Wh");
    expect(fmt.fmtWh(1200000, POWER_UNIT.W)).eq("1.200.000 Wh");
  });
  test("should format without units", () => {
    expect(fmt.fmtWh(0, POWER_UNIT.AUTO, false)).eq("0,0");
    expect(fmt.fmtWh(1200000, POWER_UNIT.AUTO, false)).eq("1.200,0");
    expect(fmt.fmtWh(0, POWER_UNIT.MW, false)).eq("0,0");
    expect(fmt.fmtWh(1200000, POWER_UNIT.MW, false)).eq("1,2");
    expect(fmt.fmtWh(0, POWER_UNIT.KW, false)).eq("0,0");
    expect(fmt.fmtWh(1200000, POWER_UNIT.KW, false)).eq("1.200,0");
    expect(fmt.fmtWh(0, POWER_UNIT.W, false)).eq("0");
    expect(fmt.fmtWh(1200000, POWER_UNIT.W, false)).eq("1.200.000");
  });
  test("should format a given number of digits", () => {
    expect(fmt.fmtWh(12345, POWER_UNIT.AUTO, true, 0)).eq("12 kWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.AUTO, true, 1)).eq("12,3 kWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.AUTO, true, 2)).eq("12,35 kWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.MW, true, 0)).eq("0 MWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.MW, true, 1)).eq("0,0 MWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.MW, true, 2)).eq("0,01 MWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.KW, true, 0)).eq("12 kWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.KW, true, 1)).eq("12,3 kWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.KW, true, 2)).eq("12,35 kWh");
    expect(fmt.fmtWh(12345, POWER_UNIT.W, true, 0)).eq("12.345 Wh");
    expect(fmt.fmtWh(12345, POWER_UNIT.W, true, 1)).eq("12.345,0 Wh");
    expect(fmt.fmtWh(12345, POWER_UNIT.W, true, 2)).eq("12.345,00 Wh");
  });
});

describe("fmtPricePerKWh", () => {
  test("should format with units", () => {
    expect(fmt.fmtPricePerKWh(0.2, CURRENCY.EUR)).eq("20,0 ct/kWh");
    expect(fmt.fmtPricePerKWh(0.2, CURRENCY.EUR, true)).eq("20,0 ct");
    expect(fmt.fmtPricePerKWh(0.234, CURRENCY.USD)).eq("23,4 ¢/kWh");
    expect(fmt.fmtPricePerKWh(1234, CURRENCY.SEK)).eq("123.400,0 öre/kWh");
    expect(fmt.fmtPricePerKWh(0.2, CURRENCY.EUR, false, false)).eq("20,0");
    expect(fmt.fmtPricePerKWh(0.123, CURRENCY.CHF)).eq("12,3 Rp./kWh");
  });
});

describe("pricePerKWhUnit", () => {
  test("should return correct unit", () => {
    expect(fmt.pricePerKWhUnit(CURRENCY.EUR)).eq("ct/kWh");
    expect(fmt.pricePerKWhUnit(CURRENCY.EUR, true)).eq("ct");
    expect(fmt.pricePerKWhUnit(CURRENCY.USD)).eq("¢/kWh");
    expect(fmt.pricePerKWhUnit(CURRENCY.SEK)).eq("öre/kWh");
    expect(fmt.pricePerKWhUnit(CURRENCY.SEK, true)).eq("öre");
    expect(fmt.pricePerKWhUnit(CURRENCY.CHF)).eq("Rp./kWh");
  });
});

describe("energyPriceSubunit", () => {
  test("should return subunit or undefined", () => {
    expect(fmt.energyPriceSubunit(CURRENCY.EUR)).eq("ct");
    expect(fmt.energyPriceSubunit(CURRENCY.CNY)).eq(undefined);
  });
  test("should handle CHF locale-specific logic", () => {
    config.global.mocks["$i18n"].locale = "de";
    expect(fmt.energyPriceSubunit(CURRENCY.CHF)).eq("Rp.");
    config.global.mocks["$i18n"].locale = "fr";
    expect(fmt.energyPriceSubunit(CURRENCY.CHF)).eq("ct.");
    config.global.mocks["$i18n"].locale = "de";
  });
});

describe("fmtDuration", () => {
  test("should format zero duration", () => {
    expect(fmt.fmtDuration(0)).eq("—");
    expect(fmt.fmtDuration(-100)).eq("—");
  });
  test("should format seconds", () => {
    expect(fmt.fmtDuration(1)).eq("1\u202Fs");
    expect(fmt.fmtDuration(59)).eq("59\u202Fs");
    expect(fmt.fmtDuration(59, false)).eq("59");
    expect(fmt.fmtDuration(59, true, "m")).eq("0:59\u202Fm");
    expect(fmt.fmtDuration(59, true, "h")).eq("0:00\u202Fh");
  });
  test("should format minutes", () => {
    expect(fmt.fmtDuration(60)).eq("1:00\u202Fm");
    expect(fmt.fmtDuration(150)).eq("2:30\u202Fm");
    expect(fmt.fmtDuration(150, false)).eq("2:30");
    expect(fmt.fmtDuration(150, true, "h")).eq("0:02\u202Fh");
  });
  test("should format hours", () => {
    expect(fmt.fmtDuration(60 * 60)).eq("1:00\u202Fh");
    expect(fmt.fmtDuration(60 * 60 * 2.5)).eq("2:30\u202Fh");
    expect(fmt.fmtDuration(60 * 60 * 2.5, false)).eq("2:30");
  });
  test("should format internationalized", () => {
    config.global.mocks["$i18n"].locale = "ar-EG";
    expect(fmt.fmtDuration(30, false)).eq("٣٠");
    expect(fmt.fmtDuration(90, false)).eq("١:٣٠");
    expect(fmt.fmtDuration(60 * 100, false)).eq("١:٤٠");
    config.global.mocks["$i18n"].locale = "de-DE";
  });
});

describe("getWeekdaysList", () => {
  test("should return the correct weekday-order", () => {
    expect(fmt.getWeekdaysList("long")).toEqual([
      { name: "Montag", value: 1 },
      { name: "Dienstag", value: 2 },
      { name: "Mittwoch", value: 3 },
      { name: "Donnerstag", value: 4 },
      { name: "Freitag", value: 5 },
      { name: "Samstag", value: 6 },
      { name: "Sonntag", value: 0 },
    ]);
  });
});

describe("getMonthsList", () => {
  test("should return the correct month-order", () => {
    expect(fmt.getMonthsList("long")).toEqual([
      { name: "Januar", value: 0 },
      { name: "Februar", value: 1 },
      { name: "März", value: 2 },
      { name: "April", value: 3 },
      { name: "Mai", value: 4 },
      { name: "Juni", value: 5 },
      { name: "Juli", value: 6 },
      { name: "August", value: 7 },
      { name: "September", value: 8 },
      { name: "Oktober", value: 9 },
      { name: "November", value: 10 },
      { name: "Dezember", value: 11 },
    ]);
  });
  test("should return short month names", () => {
    const shortMonths = fmt.getMonthsList("short");
    expect(shortMonths).toHaveLength(12);
    expect(shortMonths[0]).toEqual({ name: "Jan", value: 0 });
    expect(shortMonths[11]).toEqual({ name: "Dez", value: 11 });
  });
});

describe("fmtWeekdaysRange", () => {
  test("should format single days", () => {
    expect(fmt.fmtWeekdaysRange([0])).eq("So");
    expect(fmt.fmtWeekdaysRange([0, 2, 4, 6])).eq("Di, Do, Sa, So");
    expect(fmt.fmtWeekdaysRange([6])).eq("Sa");
    expect(fmt.fmtWeekdaysRange([3, 6])).eq("Mi, Sa");
  });
  test("should format ranges", () => {
    expect(fmt.fmtWeekdaysRange([1, 2])).eq("Mo, Di");
    expect(fmt.fmtWeekdaysRange([0, 1, 2, 3, 4, 5, 6])).eq("Mo – So");
    expect(fmt.fmtWeekdaysRange([0, 1, 3, 4, 5])).eq("Mo, Mi – Fr, So");
  });
  test("should format single days and ranges", () => {
    expect(fmt.fmtWeekdaysRange([0, 1, 3, 5, 6])).eq("Mo, Mi, Fr – So");
    expect(fmt.fmtWeekdaysRange([0, 2, 3, 5, 6])).eq("Di, Mi, Fr – So");
  });
});

describe("fmtMonthsRange", () => {
  test("should format single months", () => {
    expect(fmt.fmtMonthsRange([0])).eq("Jan");
    expect(fmt.fmtMonthsRange([0, 3, 6, 9])).eq("Jan, Apr, Jul, Okt");
    expect(fmt.fmtMonthsRange([11])).eq("Dez");
    expect(fmt.fmtMonthsRange([2, 8])).eq("Mär, Sep");
  });
  test("should format ranges", () => {
    expect(fmt.fmtMonthsRange([0, 1])).eq("Jan, Feb");
    expect(fmt.fmtMonthsRange([0, 1, 2])).eq("Jan – Mär");
    expect(fmt.fmtMonthsRange([9, 10, 11])).eq("Okt – Dez");
    expect(fmt.fmtMonthsRange([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])).eq("Jan – Dez");
  });
  test("should format single months and ranges", () => {
    expect(fmt.fmtMonthsRange([0, 1, 2, 5, 9, 10, 11])).eq("Jan – Mär, Jun, Okt – Dez");
    expect(fmt.fmtMonthsRange([0, 3, 4, 5, 8])).eq("Jan, Apr – Jun, Sep");
  });
  test("should handle empty array", () => {
    expect(fmt.fmtMonthsRange([])).eq("–");
  });
});

describe("fmtPercentage", () => {
  test("should format percentage", () => {
    expect(fmt.fmtPercentage(0)).eq("0 %");
    expect(fmt.fmtPercentage(100)).eq("100 %");
    expect(fmt.fmtPercentage(100, 1)).eq("100,0 %");
  });
  test("should force signed", () => {
    expect(fmt.fmtPercentage(100, 0, true)).eq("+100 %");
    expect(fmt.fmtPercentage(100, 0, false)).eq("100 %");
    expect(fmt.fmtPercentage(-100, 0, true)).eq("-100 %");
    expect(fmt.fmtPercentage(-100, 0, false)).eq("-100 %");
  });
});

const testDate = new Date(2023, 0, 15, 15, 30); // Jan 15, 2023, 15:30 (3:30 PM)

describe("12h/24h time format", () => {
  test("12h format", () => {
    is12hSpy.mockReturnValue(true);
    expect(fmt.fmtHourMinute(testDate)).toBe("3:30 PM");
    expect(fmt.fmtFullDateTime(testDate, false)).toBe("So., 15. Jan., 3:30 PM");
    expect(fmt.fmtWeekdayTime(testDate)).toBe("So. 3:30 PM");
    expect(fmt.fmtAbsoluteDate(testDate)).toBe("So 3:30 PM");
  });

  test("24h format", () => {
    is12hSpy.mockReturnValue(false);
    expect(fmt.fmtHourMinute(testDate)).toBe("15:30");
    expect(fmt.fmtFullDateTime(testDate, false)).toBe("So., 15. Jan., 15:30");
    expect(fmt.fmtWeekdayTime(testDate)).toBe("So., 15:30");
    expect(fmt.fmtAbsoluteDate(testDate)).toBe("So 15:30");
  });
});

describe("fmtTimeRange", () => {
  test("should format time ranges in 24h format", () => {
    is12hSpy.mockReturnValue(false);
    expect(fmt.fmtTimeRange("09:00-17:00")).toBe("9:00 – 17:00");
    expect(fmt.fmtTimeRange("06:00-12:00")).toBe("6:00 – 12:00");
  });

  test("should format time ranges in 12h format", () => {
    is12hSpy.mockReturnValue(true);
    expect(fmt.fmtTimeRange("09:00-17:00")).toBe("9:00 AM – 5:00 PM");
    expect(fmt.fmtTimeRange("00:00-23:59")).toBe("12:00 AM – 11:59 PM");
  });

  test("should always include minutes", () => {
    is12hSpy.mockReturnValue(false);
    expect(fmt.fmtTimeRange("09:00-17:00")).toBe("9:00 – 17:00");
    expect(fmt.fmtTimeRange("09:15-17:45")).toBe("9:15 – 17:45");
  });

  test("should handle empty input", () => {
    expect(fmt.fmtTimeRange("")).toBe("");
  });
});

describe("hourShort", () => {
  const afternoon = new Date(2026, 0, 1, 16);

  test("should strip locale suffixes in 24h format", () => {
    is12hSpy.mockReturnValue(false);
    for (const locale of ["de", "fr", "en", "ja"]) {
      config.global.mocks["$i18n"].locale = locale;
      expect(fmt.hourShort(afternoon)).toBe("16");
    }
    config.global.mocks["$i18n"].locale = "de";
  });

  test("should include day period in 12h format", () => {
    is12hSpy.mockReturnValue(true);
    const expected = { de: "4 PM", fr: "4 PM", en: "4 PM", ja: "午後 4" };
    for (const [locale, value] of Object.entries(expected)) {
      config.global.mocks["$i18n"].locale = locale;
      expect(fmt.hourShort(afternoon)).toBe(value);
    }
    config.global.mocks["$i18n"].locale = "en";
    expect(fmt.hourShort(new Date(2026, 0, 1, 0))).toBe("12 AM");
    is12hSpy.mockReturnValue(false);
    config.global.mocks["$i18n"].locale = "de";
  });
});

describe("relativeDayName", () => {
  const day = (offset: number) => {
    const d = new Date();
    d.setDate(d.getDate() + offset);
    return d;
  };

  test("should name adjacent days", () => {
    expect(fmt.relativeDayName(day(-1))).toBe("gestern");
    expect(fmt.relativeDayName(day(0))).toBe("heute");
    expect(fmt.relativeDayName(day(1))).toBe("morgen");
  });

  test("should return null beyond one day", () => {
    expect(fmt.relativeDayName(day(-2))).toBeNull();
    expect(fmt.relativeDayName(day(2))).toBeNull();
  });
});