// packages/components/src/theme/color-algorithms.ts
import { colord, extend } from "colord";
import a11yPlugin from "colord/plugins/a11y";
import namesPlugin from "colord/plugins/names";
import warning from "@wordpress/warning";
import { COLORS } from "../utils/index.js";
extend([namesPlugin, a11yPlugin]);
function generateThemeVariables(inputs) {
  validateInputs(inputs);
  const generatedColors = {
    ...generateAccentDependentColors(inputs.accent),
    ...generateBackgroundDependentColors(inputs.background)
  };
  warnContrastIssues(checkContrasts(inputs, generatedColors));
  return {
    colors: generatedColors
  };
}
function validateInputs(inputs) {
  for (const [key, value] of Object.entries(inputs)) {
    if (typeof value !== "undefined" && !colord(value).isValid()) {
      globalThis.SCRIPT_DEBUG === true ? warning(`wp.components.Theme: "${value}" is not a valid color value for the '${key}' prop.`) : void 0;
    }
  }
}
function checkContrasts(inputs, outputs) {
  const background = inputs.background || COLORS.white;
  const accent = inputs.accent || "#3858e9";
  const foreground = outputs.foreground || COLORS.gray[900];
  const gray = outputs.gray || COLORS.gray;
  return {
    accent: colord(background).isReadable(accent) ? void 0 : `The background color ("${background}") does not have sufficient contrast against the accent color ("${accent}").`,
    foreground: colord(background).isReadable(foreground) ? void 0 : `The background color provided ("${background}") does not have sufficient contrast against the standard foreground colors.`,
    grays: colord(background).contrast(gray[600]) >= 3 && colord(background).contrast(gray[700]) >= 4.5 ? void 0 : `The background color provided ("${background}") cannot generate a set of grayscale foreground colors with sufficient contrast. Try adjusting the color to be lighter or darker.`
  };
}
function warnContrastIssues(issues) {
  for (const error of Object.values(issues)) {
    if (error) {
      globalThis.SCRIPT_DEBUG === true ? warning("wp.components.Theme: " + error) : void 0;
    }
  }
}
function generateAccentDependentColors(accent) {
  if (!accent) {
    return {};
  }
  return {
    accent,
    accentDarker10: colord(accent).darken(0.1).toHex(),
    accentDarker20: colord(accent).darken(0.2).toHex(),
    accentInverted: getForegroundForColor(accent)
  };
}
function generateBackgroundDependentColors(background) {
  if (!background) {
    return {};
  }
  const foreground = getForegroundForColor(background);
  return {
    background,
    foreground,
    foregroundInverted: getForegroundForColor(foreground),
    gray: generateShades(background, foreground)
  };
}
function getForegroundForColor(color) {
  return colord(color).isDark() ? COLORS.white : COLORS.gray[900];
}
function generateShades(background, foreground) {
  const SHADES = {
    100: 0.06,
    200: 0.121,
    300: 0.132,
    400: 0.2,
    600: 0.42,
    700: 0.543,
    800: 0.821
  };
  const limit = 0.884;
  const direction = colord(background).isDark() ? "lighten" : "darken";
  const range = Math.abs(colord(background).toHsl().l - colord(foreground).toHsl().l) / 100;
  const result = {};
  Object.entries(SHADES).forEach(([key, value]) => {
    result[parseInt(key)] = colord(background)[direction](value / limit * range).toHex();
  });
  return result;
}
export {
  checkContrasts,
  generateShades,
  generateThemeVariables
};
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