// src/scripts/api-audit.ts
import { execSync } from 'child_process';

interface EndpointUsage { endpoint: string; files: string[]; status: 'current' | 'deprecated'; }

const ENDPOINT_MAP = [
  // Current endpoints
  { pattern: '/mixed_people/api_search', status: 'current' as const },
  { pattern: '/mixed_companies/search', status: 'current' as const },
  { pattern: '/people/match', status: 'current' as const },
  { pattern: '/people/bulk_match', status: 'current' as const },
  { pattern: '/organizations/enrich', status: 'current' as const },
  { pattern: '/contacts/search', status: 'current' as const },
  { pattern: '/emailer_campaigns', status: 'current' as const },
  { pattern: '/email_accounts', status: 'current' as const },
  { pattern: '/opportunities', status: 'current' as const },
  // Deprecated patterns
  { pattern: '/people/search', status: 'deprecated' as const },  // old search endpoint
  { pattern: '/organizations/search', status: 'deprecated' as const },
  { pattern: 'api_key.*=', status: 'deprecated' as const },  // query param auth
  { pattern: 'api.apollo.io/v1', status: 'deprecated' as const },  // old base URL (should be /api/v1)
];

function auditUsage(srcDir: string = 'src'): EndpointUsage[] {
  const results: EndpointUsage[] = [];
  for (const ep of ENDPOINT_MAP) {
    try {
      const files = execSync(
        `grep -rl "${ep.pattern}" ${srcDir} --include="*.ts" --include="*.js" 2>/dev/null`,
        { encoding: 'utf-8' },
      ).trim().split('\n').filter(Boolean);
      if (files.length > 0) results.push({ endpoint: ep.pattern, files, status: ep.status });
    } catch { /* no matches */ }
  }

  console.log('=== Apollo API Usage Audit ===');
  for (const r of results) {
    const icon = r.status === 'deprecated' ? 'WARN' : 'OK';
    console.log(`${icon} ${r.endpoint} (${r.files.length} files)`);
    r.files.forEach((f) => console.log(`     ${f}`));
  }
  const deprecated = results.filter((r) => r.status === 'deprecated');
  if (deprecated.length > 0) {
    console.log(`\n${deprecated.length} deprecated pattern(s) found — migration needed`);
  }
  return results;
}

// src/migration/apollo-migration-map.ts
interface MigrationRule {
  description: string;
  find: string | RegExp;
  replace: string;
  breaking: boolean;
}

const MIGRATION_RULES: MigrationRule[] = [
  // Auth: query param -> header
  {
    description: 'Move API key from query param to x-api-key header',
    find: /params:\s*\{[^}]*api_key[^}]*\}/g,
    replace: "headers: { 'x-api-key': process.env.APOLLO_API_KEY! }",
    breaking: true,
  },
  // Base URL
  {
    description: 'Update base URL from /v1 to /api/v1',
    find: 'api.apollo.io/v1',
    replace: 'api.apollo.io/api/v1',
    breaking: true,
  },
  // People Search endpoint
  {
    description: 'Migrate people search to new endpoint',
    find: '/people/search',
    replace: '/mixed_people/api_search',
    breaking: true,
  },
  // People Search parameters
  {
    description: 'Rename q_organization_domains to q_organization_domains_list',
    find: 'q_organization_domains:',
    replace: 'q_organization_domains_list:',
    breaking: false,
  },
  // Organization Search endpoint
  {
    description: 'Migrate org search to new endpoint',
    find: '/organizations/search',
    replace: '/mixed_companies/search',
    breaking: true,
  },
];

// src/migration/feature-flags.ts
const flags = {
  useNewSearchEndpoint: process.env.FF_NEW_SEARCH === 'true',
  useHeaderAuth: process.env.FF_HEADER_AUTH === 'true',
  useNewBaseUrl: process.env.FF_NEW_BASE_URL === 'true',
};

export function getSearchEndpoint(): string {
  return flags.useNewSearchEndpoint ? '/mixed_people/api_search' : '/people/search';
}

export function getBaseUrl(): string {
  return flags.useNewBaseUrl ? 'https://api.apollo.io/api/v1' : 'https://api.apollo.io/v1';
}

export function getAuthConfig(): Record<string, any> {
  if (flags.useHeaderAuth) {
    return { headers: { 'x-api-key': process.env.APOLLO_API_KEY! } };
  }
  return { params: { api_key: process.env.APOLLO_API_KEY! } };
}

async function shadowTest(searchParams: Record<string, any>) {
  const oldClient = axios.create({ baseURL: 'https://api.apollo.io/v1', params: { api_key: process.env.APOLLO_API_KEY } });
  const newClient = axios.create({ baseURL: 'https://api.apollo.io/api/v1', headers: { 'x-api-key': process.env.APOLLO_API_KEY! } });

  const [oldResult, newResult] = await Promise.allSettled([
    oldClient.post('/people/search', searchParams),
    newClient.post('/mixed_people/api_search', searchParams),
  ]);

  console.log('Shadow test results:');
  console.log(`  Old: ${oldResult.status === 'fulfilled' ? oldResult.value.status : 'FAIL'}`);
  console.log(`  New: ${newResult.status === 'fulfilled' ? newResult.value.status : 'FAIL'}`);

  if (oldResult.status === 'fulfilled' && newResult.status === 'fulfilled') {
    const oldCount = oldResult.value.data.people?.length ?? 0;
    const newCount = newResult.value.data.people?.length ?? 0;
    console.log(`  Results match: ${oldCount === newCount} (old: ${oldCount}, new: ${newCount})`);
  }
}

# Find remaining deprecated patterns
grep -rn "api.apollo.io/v1[^/]" src/ --include="*.ts" || echo "No old base URL found"
grep -rn "api_key.*=" src/ --include="*.ts" | grep -v "x-api-key" || echo "No query param auth found"
grep -rn "/people/search" src/ --include="*.ts" | grep -v "mixed_people" || echo "No old search endpoint found"

echo "Cleanup complete. Remove feature flags: FF_NEW_SEARCH, FF_HEADER_AUTH, FF_NEW_BASE_URL"