// Generates static TypeScript files with pre-computed theme constants.
// These values are string literals with no runtime imports, so wyw-in-js
// can evaluate them in its restricted sandbox without triggering the
// twenty-ui dist bundle's dependency chain (safe-regex-test / get-intrinsic).
//
// Usage (from workspace root):
//   npx tsx packages/twenty-ui/scripts/generateThemeConstants.ts
//
// Prerequisites: twenty-ui must be built first (npx nx build twenty-ui).

import { createRequire } from 'node:module';
import { writeFileSync, mkdirSync } from 'node:fs';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

const scriptDir = dirname(fileURLToPath(import.meta.url));
const require = createRequire(import.meta.url);

const {
  MOBILE_VIEWPORT,
  THEME_LIGHT,
  THEME_DARK,
  prepareThemeForRootCssVariableInjection,
} = require('../dist/theme.cjs');

const { themeCssVariables: existingThemeCssVariables } =
  require('../dist/theme-constants.cjs');

const themeCssVariables =
  existingThemeCssVariables ??
  (() => {
    const { buildThemeReferencingRootCssVariables } =
      require('../dist/theme.cjs');
    return buildThemeReferencingRootCssVariables({
      themeNode: THEME_LIGHT,
      prefix: 't',
    });
  })();

const HEADER = `\
// Auto-generated by scripts/generateThemeConstants.ts — do not edit manually.
// Regenerate: npx tsx packages/twenty-ui/scripts/generateThemeConstants.ts
`;

const serializeObject = (
  obj: Record<string, unknown>,
  indent = 2,
): string => {
  const spaces = ' '.repeat(indent);
  const entries = Object.entries(obj).map(([key, value]) => {
    const safeKey = /^[a-zA-Z_$][a-zA-Z0-9_$]*$/.test(key)
      ? key
      : JSON.stringify(key);

    if (typeof value === 'object' && value !== null) {
      return `${spaces}${safeKey}: ${serializeObject(value as Record<string, unknown>, indent + 2)},`;
    }
    return `${spaces}${safeKey}: ${JSON.stringify(value)},`;
  });

  return `{\n${entries.join('\n')}\n${' '.repeat(indent - 2)}}`;
};

const serializeTupleArray = (entries: [string, string][]): string => {
  const lines = entries.map(
    ([name, value]) => `  [${JSON.stringify(name)}, ${JSON.stringify(value)}],`,
  );
  return `[\n${lines.join('\n')}\n]`;
};

const outputDir = resolve(scriptDir, '../src/theme-constants/generated');
mkdirSync(outputDir, { recursive: true });

// --- themeCssVariables.ts ---

writeFileSync(
  resolve(outputDir, 'themeCssVariables.ts'),
  `${HEADER}
import type { ThemeType } from '@ui/theme/types/ThemeType';

type DeepCSSVariableRefs<T> = {
  [K in keyof T]: T[K] extends (...args: never[]) => unknown
    ? Record<string | number, string>
    : T[K] extends Record<string, unknown>
      ? DeepCSSVariableRefs<T[K]>
      : string;
};

export const themeCssVariables = ${serializeObject(themeCssVariables)} as DeepCSSVariableRefs<ThemeType>;
`,
  'utf-8',
);
console.log('Generated themeCssVariables.ts');

// --- themeLightCssVariableEntries.ts ---

const lightEntries = prepareThemeForRootCssVariableInjection({
  themeNode: THEME_LIGHT,
  prefix: 't',
}) as [string, string][];

writeFileSync(
  resolve(outputDir, 'themeLightCssVariableEntries.ts'),
  `${HEADER}
// CSS custom properties don't work in media queries, so MOBILE_VIEWPORT
// must be a static number rather than a var(--...) reference.
export const MOBILE_VIEWPORT = ${MOBILE_VIEWPORT};

export const THEME_LIGHT_CSS_VARIABLE_ENTRIES: [string, string][] = ${serializeTupleArray(lightEntries)};
`,
  'utf-8',
);
console.log('Generated themeLightCssVariableEntries.ts');

// --- themeDarkCssVariableEntries.ts ---

const darkEntries = prepareThemeForRootCssVariableInjection({
  themeNode: THEME_DARK,
  prefix: 't',
}) as [string, string][];

writeFileSync(
  resolve(outputDir, 'themeDarkCssVariableEntries.ts'),
  `${HEADER}
export const THEME_DARK_CSS_VARIABLE_ENTRIES: [string, string][] = ${serializeTupleArray(darkEntries)};
`,
  'utf-8',
);
console.log('Generated themeDarkCssVariableEntries.ts');