import defaultTheme from 'tailwindcss/defaultTheme';
import flattenColorPalette from 'tailwindcss/lib/util/flattenColorPalette';

function rem2px(input, fontSize = 16) {
  if (input == null) {
    return input;
  }

  switch (typeof input) {
    case 'object': {
      if (Array.isArray(input)) {
        return input.map((val) => rem2px(val, fontSize));
      }
      const ret = {};
      for (const key in input) {
        ret[key] = rem2px(input[key]);
      }
      return ret;
    }
    case 'string':
      return input.replace(
        /(\d*\.?\d+)rem$/,
        (_, val) => `${parseFloat(val) * fontSize}px`,
      );
    default:
      return input;
  }
}

/** @type {import('tailwindcss').Config} */
export default {
  content: ['./src/**/*.{js,ts,jsx,tsx,vue}'],
  theme: {
    extend: {
      fontFamily: {
        sans: ['Poppins', ...defaultTheme.fontFamily.sans],
        mono: ['IBM Plex Mono', ...defaultTheme.fontFamily.sans],
      },
      colors: {
        border: 'hsl(var(--border))',
        input: 'hsl(var(--input))',
        ring: 'hsl(var(--ring))',
        background: 'hsl(var(--background))',
        foreground: 'hsl(var(--foreground))',
        primary: {
          DEFAULT: 'hsl(var(--primary))',
          foreground: 'hsl(var(--primary-foreground))',
        },
        secondary: {
          DEFAULT: 'hsl(var(--secondary))',
          foreground: 'hsl(var(--secondary-foreground))',
        },
        destructive: {
          DEFAULT: 'hsl(var(--destructive))',
          foreground: 'hsl(var(--destructive-foreground))',
        },
        muted: {
          DEFAULT: 'hsl(var(--muted))',
          foreground: 'hsl(var(--muted-foreground))',
        },
        accent: {
          DEFAULT: 'hsl(var(--accent))',
          foreground: 'hsl(var(--accent-foreground))',
        },
        popover: {
          DEFAULT: 'hsl(var(--popover))',
          foreground: 'hsl(var(--popover-foreground))',
        },
        card: {
          DEFAULT: 'hsl(var(--card))',
          foreground: 'hsl(var(--card-foreground))',
        },
      },
      borderRadius: {
        lg: 'var(--radius)',
        md: 'calc(var(--radius) - 2px)',
        sm: 'calc(var(--radius) - 4px)',
      },
      columns: rem2px(defaultTheme.columns),
      fontSize: rem2px(defaultTheme.fontSize),
      lineHeight: rem2px(defaultTheme.lineHeight),
      maxWidth: ({ theme, breakpoints }) => ({
        ...rem2px(defaultTheme.maxWidth({ theme, breakpoints })),
      }),
      spacing: rem2px(defaultTheme.spacing),
    },
  },
  plugins: [
    function ({ matchUtilities, theme }) {
      matchUtilities(
        {
          highlight: (value) => ({ boxShadow: `inset 0 1px 0 0 ${value}` }),
        },
        {
          values: flattenColorPalette(theme('backgroundColor')),
          type: 'color',
        },
      );
    },
  ],
};