// Lint rules, kept to the mistakes tests can't catch — chiefly a name that
// doesn't exist, which only shows up when that line finally runs.
const js = require('@eslint/js');
const globals = require('globals');

module.exports = [
  { ignores: ['node_modules/**', 'uploads/**', 'thumbnails/**', 'glb/**', 'extracted/**', 'models/**', 'data/**', 'backups/**', 'tools/venv/**'] },

  // The server: Node, CommonJS.
  {
    files: ['**/*.js'],
    languageOptions: {
      ecmaVersion: 2023,
      sourceType: 'commonjs',
      globals: { ...globals.node },
    },
    rules: {
      ...js.configs.recommended.rules,
      'no-unused-vars': ['error', { argsIgnorePattern: '^_|^next$', caughtErrors: 'none' }],
    },
  },

  // The browser: plain scripts sharing globals across files, plus one module.
  {
    files: ['public/**/*.js'],
    languageOptions: {
      sourceType: 'script',
      globals: {
        ...globals.browser,
        ModelViewer: 'readonly',   // viewer.js hangs it on window
        PRINTER_MODELS: 'readonly', // printer-art.js does the same
      },
    },
  },
  {
    files: ['public/viewer.js'],
    languageOptions: { sourceType: 'module' },
  },

  // Tests.
  {
    files: ['test/**/*.js'],
    languageOptions: { globals: { ...globals.node } },
  },
];