#!/usr/bin/env node
/**
 * test_verify.mjs - Extension badge count verification test using Selenium WebDriver
 *
 * Verifies Rentgen's core functionality: counting third-party domains.
 * Tests two scenarios:
 * 1. Site without third-party domains (news.ycombinator.com) → badge = 0
 * 2. Site with third-party domains (pudelek.pl) → badge > 0
 */

import { Builder } from 'selenium-webdriver';
import firefox from 'selenium-webdriver/firefox.js';
import { readFileSync } from 'fs';
import { fileURLToPath } from 'url';
import { dirname, join } from 'path';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// Load test library once
const testLibPath = join(__dirname, 'test-lib.js');
const testLib = readFileSync(testLibPath, 'utf-8');

/**
 * Test badge count for a specific URL
 * @param {WebDriver} driver - Selenium WebDriver instance
 * @param {string} url - URL to test
 * @param {number} waitMs - How long to wait after page load
 * @returns {Promise<number|null>} Badge count or null on failure
 */
async function testUrl(driver, url, waitMs = 5000) {
    await driver.get(url);
    await driver.sleep(waitMs);

    const badgeCount = await driver.executeAsyncScript(`
        const testLibCode = arguments[0];
        const callback = arguments[1];

        eval(testLibCode);
        testBadgeCount().then(callback).catch(err => callback(null));
    `, testLib);

    return badgeCount;
}

/**
 * Verify badge count matches expected value
 * @param {number|null} actual - Actual badge count
 * @param {number|string} expected - Expected value (number or '>0')
 * @returns {boolean} Whether assertion passed
 */
function assertBadgeCount(actual, expected) {
    if (actual === null) return false;
    if (expected === '>0') return actual > 0;
    return actual === expected;
}

async function testBadgeCount() {
    let driver = null;

    try {
        const extensionPath = join(__dirname, '..');

        console.log('  Launching Firefox with extension...');

        const options = new firefox.Options();
        if (process.env.HEADLESS !== 'false') {
            options.addArguments('-headless');
        }

        driver = await new Builder()
            .forBrowser('firefox')
            .setFirefoxOptions(options)
            .build();

        console.log('  Installing extension...');
        await driver.installAddon(extensionPath, true);

        // Test cases: [url, expectedBadgeCount, waitMs, name]
        const testCases = [
            ['https://news.ycombinator.com', 0, 5000, 'news.ycombinator.com'],
            ['https://pudelek.pl', '>0', 10000, 'pudelek.pl']
        ];

        const results = {};

        for (const [url, expected, waitMs, name] of testCases) {
            console.log(`  Testing ${name} (expected: ${expected === '>0' ? '>0' : expected} third-party domains)...`);
            const badgeCount = await testUrl(driver, url, waitMs);
            results[name] = badgeCount;
            console.log(`    → Badge count: ${badgeCount}`);

            if (!assertBadgeCount(badgeCount, expected)) {
                await driver.quit();
                return {
                    success: false,
                    error: `${name}: expected ${expected}, got ${badgeCount}`
                };
            }
        }

        await driver.quit();
        return { success: true, results };

    } catch (error) {
        if (driver) {
            await driver.quit();
        }
        return { success: false, error: error.message };
    }
}

async function main() {
    console.log('Starting Rentgen badge count verification test...');
    console.log('');

    const result = await testBadgeCount();

    console.log('');
    if (!result.success) {
        console.log(`FAIL: ${result.error}`);
        process.exit(1);
    }

    console.log('PASS: Badge count test succeeded!');
    const resultNames = Object.keys(result.results);
    for (const name of resultNames) {
        console.log(`  - ${name}: ${result.results[name]} third-party domains`);
    }
    process.exit(0);
}

// Handle signals
process.on('SIGINT', () => process.exit(130));
process.on('SIGTERM', () => process.exit(143));

main().catch(error => {
    console.error(`ERROR: ${error.message}`);
    process.exit(1);
});