import { readdirSync, readFileSync } from 'node:fs';
import { join } from 'node:path';

import { describe, expect, test } from 'bun:test';

const SHOWCASE_ROOT = join(process.cwd(), 'examples', 'expo-showcase');

const IGNORED_DIRECTORY_NAMES = new Set([
  '.expo',
  '.git',
  '.turbo',
  '.vercel',
  'coverage',
  'dist',
  'node_modules',
]);

const REQUIRED_SHOWCASE_COVERAGE = {
  components: [
    'Accordion',
    'AccordionItem',
    'AppBar',
    'Avatar',
    'AvatarGroup',
    'Badge',
    'Button',
    'ButtonGroup',
    'Card',
    'Checkbox',
    'CheckboxGroup',
    'Chip',
    'ChipGroup',
    'Dialog',
    'Form',
    'FormActions',
    'FormError',
    'Field',
    'Heading',
    'Icon',
    'IconButton',
    'Image',
    'KeyboardAvoidingView',
    'TextInput',
    'MediaCard',
    'MetricCard',
    'Pagination',
    'Progress',
    'ProgressRing',
    'Radio',
    'RadioGroup',
    'Rating',
    'SearchInput',
    'Select',
    'Switch',
    'Tab',
    'TabList',
    'TabPanel',
    'Tabs',
    'Text',
    'Toolbar',
  ],
  foundation: ['Divider', 'Grid', 'Surface', 'View'],
  features: ['Uploader', 'BottomSheet', 'FlatList', 'SectionList'],
  layouts: ['AppShell', 'Screen', 'ScreenSection', 'ScrollView'],
  patterns: [
    'ForgotPasswordForm',
    'OtpForm',
    'SignInForm',
    'SignUpForm',
    'CollectionEditor',
    'EmptyState',
    'SelectableItem',
    'SelectionProvider',
    'useSelection',
    'List',
    'ListItem',
    'ListSection',
    'ReaderSurface',
    'SectionHeader',
    'Timeline',
    'PaletteItem',
    'TreeItem',
    'TreeView',
  ],
} as const;

function listFiles(root: string): string[] {
  return readdirSync(root, { withFileTypes: true }).flatMap((entry) => {
    if (entry.isDirectory() && IGNORED_DIRECTORY_NAMES.has(entry.name)) {
      return [];
    }

    const absolutePath = join(root, entry.name);
    if (entry.isDirectory()) {
      return listFiles(absolutePath);
    }

    return entry.isFile() && /\.[cm]?tsx?$/.test(entry.name) ? [absolutePath] : [];
  });
}

function readShowcaseSource(): string {
  return listFiles(SHOWCASE_ROOT)
    .map((filePath) => readFileSync(filePath, 'utf8'))
    .join('\n');
}

describe('expo showcase coverage policy', () => {
  test('does not import Surface directly from the showcase app', () => {
    for (const filePath of listFiles(SHOWCASE_ROOT)) {
      const source = readFileSync(filePath, 'utf8');
      expect(source).not.toContain("from '@ankhorage/surface'");
      expect(source).not.toContain('from "@ankhorage/surface"');
    }
  });

  test('documents public ZORA API coverage in the showcase source', () => {
    const source = readShowcaseSource();
    const requiredNames = Object.values(REQUIRED_SHOWCASE_COVERAGE).flat();

    for (const requiredName of requiredNames) {
      expect(source).toContain(requiredName);
    }
  });
});