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

// Get the root directory of the git repository
function getGitRoot() {
  try {
    return execSync('git rev-parse --show-toplevel').toString().trim();
  } catch (error) {
    console.error('Error finding git root:', error.message);
    return null;
  }
}

function getLastCommitDate(filePath) {
  try {
    const gitRoot = getGitRoot();
    if (!gitRoot) {
      console.error('Could not find git repository root');
      return null;
    }

    // Get the relative path from git root
    const relativePath = path.relative(gitRoot, path.resolve(process.cwd(), filePath));
    console.log(`Checking git history for: ${relativePath}`);
    
    // Check if the file is tracked by git
    const isTracked = execSync(`git ls-files --error-unmatch "${relativePath}" 2>/dev/null || echo ""`).toString().trim();
    if (!isTracked) {
      console.log('File is not tracked by git, using current date');
      return new Date().toISOString();
    }

    // Get the last commit date for the file
    const lastCommitDate = execSync(
      `git log -1 --format="%ad" --date=iso -- "${relativePath}"`,
      { cwd: gitRoot }
    ).toString().trim();

    return lastCommitDate || new Date().toISOString();
  } catch (error) {
    console.error('Error getting last commit date:', error.message);
    return new Date().toISOString();
  }
}

function updateLastModified() {
  const privacyPagePath = path.join(process.cwd(), 'src/app/privacy/page.tsx');
  
  try {
    let content = fs.readFileSync(privacyPagePath, 'utf8');
    const lastCommitDate = getLastCommitDate(privacyPagePath);
    
    if (!lastCommitDate) {
      console.log('Using current date as fallback');
      return;
    }

    const formattedDate = new Date(lastCommitDate).toLocaleDateString('en-US', {
      year: 'numeric',
      month: 'long',
      day: 'numeric'
    });

    const lastUpdatedText = `Last updated: ${formattedDate}`;
    
    // Check if we need to add or update the last updated line
    if (content.includes('LAST_UPDATED_PLACEHOLDER')) {
      // Replace the placeholder with the actual date
      const updatedContent = content.replace(
        /\{\/\*\s*LAST_UPDATED_PLACEHOLDER\s*\*\/\}/,
        `<p className="text-sm text-muted-foreground mb-4">
          ${lastUpdatedText}
        </p>`
      );
      
      if (updatedContent !== content) {
        fs.writeFileSync(privacyPagePath, updatedContent, 'utf8');
        console.log('✅ Updated last modified date in privacy policy');
      }
    } else {
      console.log('ℹ️ Last modified date is up to date');
    }
  } catch (error) {
    console.error('Error updating last modified date:', error.message);
  }
}

updateLastModified();