// Test content script - RUNS INSIDE THE BROWSER EXTENSION
// Only loaded during automated testing (ENABLE_TESTS=true)
// This script proves bidirectional communication between content script and background

// Browser API polyfill for Chrome/Chromium compatibility
if (typeof browser === 'undefined') {
    var browser = chrome;
}

// Set initial DOM marker to prove content script is injected
(function() {
    function setMarker() {
        if (document.body) {
            document.body.setAttribute('data-rentgen-injected', 'true');
        } else {
            // Wait for DOM ready
            if (document.readyState === 'loading') {
                document.addEventListener('DOMContentLoaded', () => {
                    document.body.setAttribute('data-rentgen-injected', 'true');
                });
            }
        }
    }
    setMarker();
})();

// Listen for test request from test script (test-lib.js)
document.addEventListener('DEBUG_rentgen_test_request', async (event) => {
    try {
        // Send message to background script to get badge count for this origin
        // This tests real Rentgen functionality: counting third-party domains
        const response = await browser.runtime.sendMessage({
            type: 'RENTGEN_TEST_VERIFICATION',
            origin: window.location.origin,
            url: window.location.href,
            title: document.title,
            timestamp: event.detail?.timestamp || Date.now()
        });

        // Store the badge count in DOM for the test script to read
        if (response && response.success) {
            document.body.setAttribute('data-rentgen-badge-count', String(response.badgeCount));
        }
    } catch (error) {
        // If there's an error, the test will timeout waiting for badge count
        console.error('Test verification error:', error);
    }
});