/**
 * Quality Label Printing Service - Content Script
 * Simplified injection for extension ID detection
 */

console.log('Quality Label Printing - Content Script Loaded');

// Inject extension ID into DOM for web page detection
function injectExtensionId() {
    // Remove any existing extension ID element
    const existingElement = document.getElementById('chrome-extension-id');
    if (existingElement) {
        existingElement.remove();
    }
    
    // Create new element with extension ID
    const extensionIdElement = document.createElement('div');
    extensionIdElement.id = 'chrome-extension-id';
    extensionIdElement.setAttribute('data-extension-id', chrome.runtime.id);
    extensionIdElement.style.display = 'none';
    
    // Add to document head or body
    (document.head || document.body || document.documentElement).appendChild(extensionIdElement);
    
    console.log('Extension ID injected:', chrome.runtime.id);
}

// Inject extension ID when DOM is ready
if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', injectExtensionId);
} else {
    injectExtensionId();
}

// Also inject when page changes (for SPAs)
if (window.navigation) {
    navigation.addEventListener('navigate', injectExtensionId);
} else {
    // Fallback for older browsers
    let lastUrl = location.href;
    new MutationObserver(() => {
        const url = location.href;
        if (url !== lastUrl) {
            lastUrl = url;
            setTimeout(injectExtensionId, 100);
        }
    }).observe(document, { subtree: true, childList: true });
}