const { hairlineWidth, platformSelect } = require('nativewind/theme');
const tokens = require('./design-tokens.json');

const toKebabCase = (value) =>
  value.replace(/[A-Z]/g, (match) => `-${match.toLowerCase()}`);
const px = (value) => `${value}px`;
const fontConfig = (fontKey) => {
  const font = tokens.fonts[fontKey];

  return platformSelect(font);
};

const typographyVarName = (key) => {
  const kebab = toKebabCase(key);
  return key.startsWith('lineHeight')
    ? `--line-height-${kebab.replace('line-height-', '')}`
    : `--font-size-${kebab}`;
};

const typographyVars = (mode) =>
  Object.fromEntries(
    Object.entries(tokens.typography[mode]).map(([key, value]) => [
      typographyVarName(key),
      px(value),
    ]),
  );

// Use default theme for Tailwind base (runtime theme switch via ThemeProvider)
const defaultLight = tokens.colors.default.light;
const defaultDark = tokens.colors.default.dark;

const rootVariables = Object.fromEntries([
  ...Object.entries(defaultLight).map(([key, value]) => [
    `--${toKebabCase(key)}`,
    value,
  ]),
  ['--radius', px(tokens.radius.default)],
  ...Object.entries(typographyVars('normal')),
]);

const darkVariables = Object.fromEntries(
  Object.entries(defaultDark).map(([key, value]) => [
    `--${toKebabCase(key)}`,
    value,
  ]),
);

// Mobile-first breakpoints for native (phone/tablet) and web
const breakpoints = Object.fromEntries(
  Object.entries(tokens.layout.breakpoints).map(([key, value]) => [
    key,
    `${value}px`,
  ]),
);

/** @type {import('tailwindcss').Config} */
module.exports = {
  darkMode: 'class',
  content: [
    './src/app/**/*.{ts,tsx}',
    './src/components/**/*.{ts,tsx}',
    './src/core/**/*.{ts,tsx}',
    './src/hooks/**/*.{ts,tsx}',
    './src/lib/**/*.{ts,tsx}',
  ],
  presets: [require('nativewind/preset')],
  theme: {
    screens: breakpoints,
    extend: {
      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))',
        },
        success: {
          DEFAULT: 'hsl(var(--success))',
          foreground: 'hsl(var(--success-foreground))',
        },
        warning: {
          DEFAULT: 'hsl(var(--warning))',
          foreground: 'hsl(var(--warning-foreground))',
        },
        info: {
          DEFAULT: 'hsl(var(--info))',
          foreground: 'hsl(var(--info-foreground))',
        },
      },
      fontFamily: {
        sans: fontConfig('sans'),
        display: fontConfig('display'),
        rounded: fontConfig('rounded'),
        serif: fontConfig('serif'),
        mono: fontConfig('mono'),
      },
      fontSize: {
        headingLarge: 'var(--font-size-heading-large)',
        headingMedium: 'var(--font-size-heading-medium)',
        headingSmall: 'var(--font-size-heading-small)',
        titleLarge: 'var(--font-size-title-large)',
        titleMedium: 'var(--font-size-title-medium)',
        titleSmall: 'var(--font-size-title-small)',
        bodyLarge: 'var(--font-size-body-large)',
        bodyMedium: 'var(--font-size-body-medium)',
        bodySmall: 'var(--font-size-body-small)',
        captionLarge: 'var(--font-size-caption-large)',
        captionMedium: 'var(--font-size-caption-medium)',
        captionSmall: 'var(--font-size-caption-small)',
        sectionTitle: 'var(--font-size-section-title)',
        badge: 'var(--font-size-badge)',
      },
      lineHeight: {
        normal: 'var(--line-height-normal)',
        tight: 'var(--line-height-tight)',
        loose: 'var(--line-height-loose)',
        xLoose: 'var(--line-height-x-loose)',
      },
      borderRadius: {
        lg: 'var(--radius)',
        md: 'calc(var(--radius) - 2px)',
        sm: 'calc(var(--radius) - 4px)',
        xl: px(tokens.radius.xl),
      },
      spacing: {
        'screen-gutter': px(tokens.layout.screenGutter),
      },
      borderWidth: {
        hairline: hairlineWidth(),
      },
      maxWidth: {
        content: px(tokens.layout.contentMaxWidth),
      },
      keyframes: {
        'accordion-down': {
          from: { height: '0' },
          to: { height: 'var(--radix-accordion-content-height)' },
        },
        'accordion-up': {
          from: { height: 'var(--radix-accordion-content-height)' },
          to: { height: '0' },
        },
      },
      animation: {
        'accordion-down': 'accordion-down 0.2s ease-out',
        'accordion-up': 'accordion-up 0.2s ease-out',
      },
    },
  },
  future: {
    hoverOnlyWhenSupported: true,
  },
  plugins: [
    require('tailwindcss-animate'),
    ({ addBase }) => {
      addBase({
        ':root': rootVariables,
        '.dark:root': darkVariables,
      });
    },
  ],
};