#!/usr/bin/env node

/**
 * Post-Migration Script: Update documentation and references
 * 
 * This script handles post-migration tasks:
 * 1. Update Swagger YAML documentation files
 * 2. Update app.js if needed
 * 3. Update Postman collection files
 * 4. Update other references to v1/v2/v3
 * 
 * Usage: node scripts/update-references-post-migration.js
 */

const fs = require('fs');
const path = require('path');
const { execSync } = require('child_process');

const colors = {
  reset: '\x1b[0m',
  green: '\x1b[32m',
  yellow: '\x1b[33m',
  red: '\x1b[31m',
  cyan: '\x1b[36m',
  blue: '\x1b[34m',
};

const log = {
  info: (msg) => console.log(`${colors.cyan}ℹ${colors.reset} ${msg}`),
  success: (msg) => console.log(`${colors.green}✓${colors.reset} ${msg}`),
  warn: (msg) => console.log(`${colors.yellow}⚠${colors.reset} ${msg}`),
  error: (msg) => console.log(`${colors.red}✗${colors.reset} ${msg}`),
  section: (msg) => console.log(`\n${colors.blue}━━━ ${msg} ━━━${colors.reset}\n`),
};

const projectRoot = path.resolve(__dirname, '..');
const swaggerDir = path.join(projectRoot, 'src/swagger');

/**
 * Phase 1: Update Swagger YAML files
 */
function updateSwaggerYaml() {
  log.section('Phase 1: Updating Swagger YAML files');

  const pathMappings = {
    '/api/v1': '/api/skydive',
    '/api/v2': '/api/cms',
    '/api/v3': '/api/herowars',
  };

  if (!fs.existsSync(swaggerDir)) {
    log.warn(`Swagger directory not found: ${swaggerDir}`);
    return;
  }

  const yamlFiles = fs.readdirSync(swaggerDir).filter((f) => f.endsWith('.yaml'));

  yamlFiles.forEach((file) => {
    const filePath = path.join(swaggerDir, file);
    let content = fs.readFileSync(filePath, 'utf8');
    let modified = false;

    Object.entries(pathMappings).forEach(([oldPath, newPath]) => {
      if (content.includes(oldPath)) {
        const regex = new RegExp(oldPath, 'g');
        content = content.replace(regex, newPath);
        modified = true;
      }
    });

    if (modified) {
      fs.writeFileSync(filePath, content);
      log.success(`Updated: ${file}`);
    } else {
      log.info(`No changes needed: ${file}`);
    }
  });
}

/**
 * Phase 2: Update Postman collection and environment
 */
function updatePostmanFiles() {
  log.section('Phase 2: Updating Postman files');

  const testsDir = path.join(projectRoot, 'tests');
  const collectionPath = path.join(testsDir, 'adastra-api-tests.postman_collection.json');
  const environmentPath = path.join(testsDir, 'adastra-api-tests.postman_environment.json');

  const updateJsonFile = (filePath, description) => {
    if (!fs.existsSync(filePath)) {
      log.warn(`File not found: ${description}`);
      return;
    }

    let content = fs.readFileSync(filePath, 'utf8');
    let modified = false;

    const pathMappings = [
      { old: '/api/v1/', new: '/api/skydive/' },
      { old: '/api/v2/', new: '/api/cms/' },
      { old: '/api/v3/', new: '/api/herowars/' },
    ];

    pathMappings.forEach(({ old, new: newPath }) => {
      if (content.includes(old)) {
        const regex = new RegExp(old, 'g');
        content = content.replace(regex, newPath);
        modified = true;
      }
    });

    if (modified) {
      fs.writeFileSync(filePath, content);
      log.success(`Updated: ${description}`);
    } else {
      log.info(`No changes needed: ${description}`);
    }
  };

  updateJsonFile(collectionPath, 'Postman collection');
  updateJsonFile(environmentPath, 'Postman environment');
}

/**
 * Phase 3: Check and report other references
 */
function findRemainingReferences() {
  log.section('Phase 3: Scanning for remaining v1/v2/v3 references');

  const patterns = ['/api/v1', '/api/v2', '/api/v3', 'routes.use(\'/v1', 'routes.use(\'/v2', 'routes.use(\'/v3'];
  const ignorePatterns = ['node_modules', '.git', 'dist', 'build', 'v1/', 'v2/', 'v3/'];

  const filesToCheck = [
    'app.js',
    'src/config/swagger.js',
    'README.md',
    'src/app.js',
    '.env*',
  ];

  log.info('Checking key files for old path references...\n');

  let foundReferences = false;

  filesToCheck.forEach((filePattern) => {
    // Handle glob patterns like .env*
    let filePaths = [];

    if (filePattern.includes('*')) {
      const glob = path.basename(filePattern);
      const dir = path.dirname(filePattern);
      const basePath = dir === '.' ? projectRoot : path.join(projectRoot, dir);

      if (fs.existsSync(basePath)) {
        const files = fs.readdirSync(basePath);
        files.forEach((f) => {
          if (new RegExp(`^${glob.replace(/\*/g, '.*')}$`).test(f)) {
            filePaths.push(path.join(basePath, f));
          }
        });
      }
    } else {
      const fullPath = filePattern.startsWith('/') 
        ? filePattern 
        : path.join(projectRoot, filePattern);
      if (fs.existsSync(fullPath)) {
        filePaths.push(fullPath);
      }
    }

    filePaths.forEach((filePath) => {
      try {
        const content = fs.readFileSync(filePath, 'utf8');
        const lines = content.split('\n');

        patterns.forEach((pattern) => {
          lines.forEach((line, index) => {
            if (line.includes(pattern)) {
              foundReferences = true;
              const relativePath = path.relative(projectRoot, filePath);
              log.warn(`Found in [${relativePath}:${index + 1}]: ${line.trim()}`);
            }
          });
        });
      } catch (err) {
        // Silently skip files that can't be read
      }
    });
  });

  if (!foundReferences) {
    log.success('No remaining v1/v2/v3 references found in key files!');
  }
}

/**
 * Phase 4: Generate update checklist
 */
function generateUpdateChecklist() {
  log.section('Phase 4: Final checklist');

  const checklist = `
# Post-Migration Update Checklist

## Files Updated by Script ✓
- [x] Swagger YAML files (/api/v1 → /api/skydive, etc.)
- [x] Postman collection and environment files
- [x] API routes structure (new domains created)

## Manual Verification Required

### 1. Test API Endpoints
\`\`\`bash
npm run local                    # Start the server
# In another terminal:
curl http://localhost:3200/api-docs   # Check Swagger UI
\`\`\`

### 2. Verify Routes
- [ ] GET /api/skydive/jumps
- [ ] GET /api/cms/articles
- [ ] GET /api/herowars/clans
- [ ] Other domain-specific endpoints

### 3. Frontend Updates Required (if applicable)
- [ ] Update Angular environment files (environment.ts, environment.development.ts, etc.)
- [ ] Replace all API calls from /api/v1, /api/v2, /api/v3 to new domains
- [ ] Update service layer URLs
- [ ] Update HTTP interceptors if needed

### 4. Documentation Updates
- [ ] Update README.md with new API structure
- [ ] Update API documentation (if any)
- [ ] Update deployment/infrastructure docs
- [ ] Update team wiki/documentation

### 5. CI/CD Pipeline (if applicable)
- [ ] Update build/deployment scripts referencing v1/v2/v3
- [ ] Update any health checks pointing to old paths
- [ ] Update monitoring/alerting rules

### 6. Client Applications
- [ ] Update all client libraries/SDKs
- [ ] Update mobile app API endpoints
- [ ] Update third-party integrations

### 7. Database/Caching (if applicable)
- [ ] Clear any cached references to old endpoints
- [ ] Update API documentation in databases
- [ ] Check for hardcoded URLs in configuration

## Git Operations
\`\`\`bash
# View the migration commits
git log --oneline -5

# If rollback needed:
git revert <commit-hash>

# Push changes
git push origin develop
\`\`\`

## Optional: Cleanup Old Directories
\`\`\`bash
# After thorough testing, remove old v1/v2/v3 directories:
rm -rf src/routes/api/v1
rm -rf src/routes/api/v2
rm -rf src/routes/api/v3
git add -A
git commit -m "chore: remove old v1/v2/v3 route directories"
\`\`\`

## Rollback Procedure
If issues arise, rollback with:
\`\`\`bash
git reset --hard HEAD~2  # Adjust commit count if needed
\`\`\`

---
Document generated: ${new Date().toISOString()}
`;

  const checklistPath = path.join(projectRoot, 'POST_MIGRATION_CHECKLIST.md');
  fs.writeFileSync(checklistPath, checklist);
  log.success(`Created: POST_MIGRATION_CHECKLIST.md`);
}

/**
 * Main execution
 */
function main() {
  console.clear();
  console.log(`
${colors.cyan}╔══════════════════════════════════════════════════════════╗
║       POST-MIGRATION: Update References & Documentation         ║
║           Domain-Based API Structure (skydive/cms/herowars)      ║
╚══════════════════════════════════════════════════════════════════╝${colors.reset}
  `);

  try {
    updateSwaggerYaml();
    updatePostmanFiles();
    findRemainingReferences();
    generateUpdateChecklist();

    log.success(`\n✓ Post-migration updates completed!\n`);
    log.info(`Next steps:
  1. Review POST_MIGRATION_CHECKLIST.md
  2. Run the server: npm run local
  3. Test endpoints in Swagger UI
  4. Update frontend API calls
  5. Run tests and verify everything works
    \n`);
  } catch (error) {
    log.error(`Post-migration update failed: ${error.message}`);
    process.exit(1);
  }
}

main();