const puppeteer = require('puppeteer');
const AuthHelper = require('./auth_helper');
const { getPuppeteerLaunchOptions } = require('./puppeteer_config');

async function testResearchResults() {
    console.log('🔍 Testing research results error handling and structure...');

    // Skip this test in CI if it's known to be unstable
    if (process.env.CI && process.env.SKIP_FLAKY_TESTS) {
        console.log('⚠️  Skipping flaky test in CI environment');
        return true;
    }

    // CI runners can be slow; align navigation timeouts with other UI tests.
    const navTimeout = process.env.CI ? 30000 : 10000;

    const browser = await puppeteer.launch(getPuppeteerLaunchOptions());

    const page = await browser.newPage();
    const baseUrl = 'http://127.0.0.1:5000';
    const authHelper = new AuthHelper(page, baseUrl);
    await page.setViewport({ width: 1400, height: 900 });

    // Set default timeout for page operations
    page.setDefaultTimeout(60000); // 60 seconds default timeout

    // Listen to console errors
    page.on('console', msg => {
        if (msg.type() === 'error') {
            console.log(`  Browser error: ${msg.text()}`);
        }
    });

    // Listen to JavaScript errors
    page.on('pageerror', error => {
        console.log(`❌ [JS ERROR] ${error.message}`);
    });

    // Track network responses
    const responses = [];
    page.on('response', response => {
        responses.push({
            url: response.url(),
            status: response.status()
        });
    });

    try {
        // First check if server is reachable
        try {
            await page.goto(baseUrl, { waitUntil: 'domcontentloaded', timeout: navTimeout });
        } catch (connError) {
            if (connError.message.includes('ERR_CONNECTION_REFUSED')) {
                console.log('❌ Server is not running on port 5000. Please start the server first.');
                await browser.close();
                return false;
            }
            throw connError;
        }

        // Authenticate first
        await authHelper.ensureAuthenticatedWithTimeout();
        console.log('✅ Logged in');

        console.log('📄 Testing non-existent research ID (expecting proper error handling)...');
        await page.goto(`${baseUrl}/results/99999`, {
            waitUntil: 'domcontentloaded',
            timeout: navTimeout
        });

        console.log('✅ Page loaded, checking error handling...');

        // Wait for page to fully load
        await new Promise(resolve => setTimeout(resolve, 2000));

        // Check page structure and error handling
        const pageInfo = await page.evaluate(() => {
            const title = document.title;
            const body = document.body;
            const errorElements = document.querySelectorAll('.error, .alert-danger, [class*="error"], .error-message');
            const loadingElements = document.querySelectorAll('.loading, .spinner, [class*="loading"]');
            const pageStructure = document.querySelector('.container, .main-content, main');
            const sidebar = document.querySelector('.sidebar, nav');

            // Get any error messages
            let errorMessage = '';
            if (errorElements.length > 0) {
                errorMessage = Array.from(errorElements).map(el => el.textContent.trim()).join('; ');
            }

            return {
                title,
                hasBody: !!body,
                bodyVisible: body ? window.getComputedStyle(body).display !== 'none' : false,
                hasErrorHandling: errorElements.length > 0 || document.body.textContent.includes('not found') || document.body.textContent.includes('404'),
                errorMessage,
                hasLoadingIndicators: loadingElements.length > 0,
                hasPageStructure: !!pageStructure,
                hasSidebar: !!sidebar,
                httpStatus: window.performance.getEntriesByType('navigation')[0]?.responseStatus || 'unknown'
            };
        });

        // Check if we got a 404 response
        const mainPageResponse = responses.find(r => r.url.includes('/results/'));
        const got404 = mainPageResponse && mainPageResponse.status === 404;

        console.log('🔍 Error Handling Analysis:');
        console.log(`   Title: ${pageInfo.title}`);
        console.log(`   HTTP Status: ${got404 ? '404 (as expected)' : mainPageResponse?.status || 'unknown'}`);
        console.log(`   Has proper error handling: ${pageInfo.hasErrorHandling}`);
        console.log(`   Error message: ${pageInfo.errorMessage || 'No error message displayed'}`);
        console.log(`   Has page structure: ${pageInfo.hasPageStructure}`);
        console.log(`   Has sidebar/navigation: ${pageInfo.hasSidebar}`);

        // Take screenshot (skip in CI — diagnostic only)
        if (!process.env.CI) {
            await page.screenshot({ path: 'research_results_error_test.png', fullPage: true });
            console.log('📸 Screenshot saved as research_results_error_test.png');
        }

        // Now test the research results template structure by going to results listing
        console.log('\n📄 Testing research results listing page...');
        await page.goto(`${baseUrl}/history/`, {
            waitUntil: 'domcontentloaded',
            timeout: navTimeout
        });

        await new Promise(resolve => setTimeout(resolve, 2000));

        const historyPageInfo = await page.evaluate(() => {
            const hasHistoryContainer = !!document.querySelector('.ldr-history-container, .research-history, [class*="history"]');
            const hasSearchBox = !!document.querySelector('input[type="search"], input[placeholder*="search" i]');
            const hasResultsList = !!document.querySelector('.results-list, .ldr-history-list, ul, table');

            return {
                hasHistoryContainer,
                hasSearchBox,
                hasResultsList,
                pageTitle: document.title
            };
        });

        console.log('\n🔍 History Page Analysis:');
        console.log(`   Title: ${historyPageInfo.pageTitle}`);
        console.log(`   Has history container: ${historyPageInfo.hasHistoryContainer}`);
        console.log(`   Has search functionality: ${historyPageInfo.hasSearchBox}`);
        console.log(`   Has results list structure: ${historyPageInfo.hasResultsList}`);

        // Test is successful if:
        // 1. Error page shows proper error handling for non-existent research
        // 2. History page has proper structure
        const isWorking = pageInfo.hasErrorHandling &&
                         pageInfo.hasPageStructure &&
                         (historyPageInfo.hasHistoryContainer || historyPageInfo.hasResultsList);

        if (isWorking) {
            console.log('\n🎉 Research results error handling and structure test passed!');
        } else {
            console.log('\n💥 Research results test failed!');
            if (!pageInfo.hasErrorHandling) console.log('   - Missing proper error handling for non-existent research');
            if (!pageInfo.hasPageStructure) console.log('   - Missing basic page structure');
            if (!historyPageInfo.hasHistoryContainer && !historyPageInfo.hasResultsList) {
                console.log('   - History page missing expected structure');
            }
        }

        await browser.close();
        return isWorking;

    } catch (error) {
        console.log(`❌ Test failed: ${error.message}`);
        await browser.close();
        return false;
    }
}

testResearchResults().then(success => {
    process.exit(success ? 0 : 1);
}).catch(console.error);
