import { expect, test } from "vitest"

import {
  hslColorValueToSrgbColorValue,
  hsvColorValueToSrgbColorValue,
  linearRgbColorValueToSrgbColorValue,
  srgbColorValueToHslColorValue,
  srgbColorValueToHsvColorValue,
  srgbColorValueToLinearRgbColorValue,
} from "#Source/color/index.ts"

test("linearRgbColorValueToSrgbColorValue converts in-gamut linear values to sRGB", () => {
  expect(linearRgbColorValueToSrgbColorValue({ red: 1, green: 0, blue: 0, alpha: 0.5 })).toEqual({
    red: 255,
    green: 0,
    blue: 0,
    alpha: 0.5,
  })

  expect(
    linearRgbColorValueToSrgbColorValue({ red: 0.5, green: 0.5, blue: 0.5, alpha: 0.5 }),
  ).toEqual({ red: 188, green: 188, blue: 188, alpha: 0.5 })

  expect(() =>
    linearRgbColorValueToSrgbColorValue({ red: 1.2, green: 0, blue: 0, alpha: 1 }),
  ).toThrow(RangeError)
})

test("srgbColorValueToLinearRgbColorValue converts sRGB values to linear values", () => {
  expect(srgbColorValueToLinearRgbColorValue({ red: 255, green: 0, blue: 0, alpha: 0.5 })).toEqual({
    red: 1,
    green: 0,
    blue: 0,
    alpha: 0.5,
  })

  expect(
    srgbColorValueToLinearRgbColorValue({ red: 128, green: 128, blue: 128, alpha: 0.5 }),
  ).toEqual({ red: 0.215_861, green: 0.215_861, blue: 0.215_861, alpha: 0.5 })
})

test("srgbColorValueToHslColorValue converts sRGB values to HSL", () => {
  expect(srgbColorValueToHslColorValue({ red: 51, green: 102, blue: 153, alpha: 1 })).toEqual({
    hue: 210,
    saturation: 0.5,
    lightness: 0.4,
    alpha: 1,
  })

  expect(srgbColorValueToHslColorValue({ red: 128, green: 128, blue: 128, alpha: 1 })).toEqual({
    hue: 0,
    saturation: 0,
    lightness: 0.501_961,
    alpha: 1,
  })
})

test("hslColorValueToSrgbColorValue converts HSL values to sRGB", () => {
  expect(
    hslColorValueToSrgbColorValue({ hue: 210, saturation: 0.5, lightness: 0.4, alpha: 1 }),
  ).toEqual({ red: 51, green: 102, blue: 153, alpha: 1 })

  expect(
    hslColorValueToSrgbColorValue({ hue: 0, saturation: 0, lightness: 0.501_961, alpha: 1 }),
  ).toEqual({ red: 128, green: 128, blue: 128, alpha: 1 })
})

test("srgbColorValueToHsvColorValue converts sRGB values to HSV", () => {
  expect(srgbColorValueToHsvColorValue({ red: 51, green: 102, blue: 153, alpha: 1 })).toEqual({
    hue: 210,
    saturation: 0.666_667,
    value: 0.6,
    alpha: 1,
  })

  expect(srgbColorValueToHsvColorValue({ red: 128, green: 128, blue: 128, alpha: 1 })).toEqual({
    hue: 0,
    saturation: 0,
    value: 0.501_961,
    alpha: 1,
  })
})

test("hsvColorValueToSrgbColorValue converts HSV values to sRGB", () => {
  expect(
    hsvColorValueToSrgbColorValue({ hue: 210, saturation: 0.666_667, value: 0.6, alpha: 1 }),
  ).toEqual({ red: 51, green: 102, blue: 153, alpha: 1 })

  expect(
    hsvColorValueToSrgbColorValue({ hue: 0, saturation: 0, value: 0.501_961, alpha: 1 }),
  ).toEqual({ red: 128, green: 128, blue: 128, alpha: 1 })
})