// content.js - Content script that runs on web pages (Chrome-optimized)

function extractSQLQuery() {
  // Look for the specific input element
  const sqlInput = document.getElementById('SQLStatementHide');
  
  if (sqlInput) {
    const sqlQuery = sqlInput.value;
    if (sqlQuery && sqlQuery.trim()) {
      return cleanupSQLQuery(sqlQuery.trim());
    } else {
      return null;
    }
  }
  
  // Fallback: look for any input with name="SQLStatementHide"
  const sqlInputByName = document.querySelector('input[name="SQLStatementHide"]');
  if (sqlInputByName) {
    const sqlQuery = sqlInputByName.value;
    if (sqlQuery && sqlQuery.trim()) {
      return cleanupSQLQuery(sqlQuery.trim());
    }
  }
  
  return null;
}

function cleanupSQLQuery(sqlQuery) {
  // Fix double single quotes around dates/values (''2017-10-23'' becomes '2017-10-23')
  // This handles the common issue where systems incorrectly double-escape quotes
  return sqlQuery.replace(/''/g, "'");
}

// Listen for messages from popup
chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
  if (request.action === "extractSQL") {
    const sqlQuery = extractSQLQuery();
    sendResponse({
      success: sqlQuery !== null,
      sqlQuery: sqlQuery,
      url: window.location.href,
      timestamp: new Date().toISOString()
    });
  }
});

// Optional: Add a visual indicator when SQL is found
function addVisualIndicator() {
  const sqlInput = document.getElementById('SQLStatementHide') || 
                   document.querySelector('input[name="SQLStatementHide"]');
  
  if (sqlInput && sqlInput.value && sqlInput.value.trim()) {
    // Add a small visual indicator that SQL was found
    if (!document.getElementById('sql-extractor-indicator')) {
      const indicator = document.createElement('div');
      indicator.id = 'sql-extractor-indicator';
      indicator.style.cssText = `
        position: fixed;
        top: 10px;
        right: 10px;
        background: #4CAF50;
        color: white;
        padding: 5px 10px;
        border-radius: 3px;
        font-size: 12px;
        z-index: 10000;
        font-family: Arial, sans-serif;
        opacity: 0.8;
        pointer-events: none;
      `;
      indicator.textContent = 'SQL Query Found';
      document.body.appendChild(indicator);
      
      // Remove indicator after 3 seconds
      setTimeout(() => {
        if (document.getElementById('sql-extractor-indicator')) {
          document.body.removeChild(indicator);
        }
      }, 3000);
    }
  }
}

// Run indicator check when page loads
if (document.readyState === 'loading') {
  document.addEventListener('DOMContentLoaded', addVisualIndicator);
} else {
  addVisualIndicator();
}