import axios from 'axios';

// Test the new trends implementation
async function testNewTrends() {
    console.log('🧪 Testing new trends implementation...\n');
    
    // Test Reddit trending
    try {
        console.log('📊 Testing Reddit trending...');
        const redditTrends = await getRedditTrending();
        
        if (redditTrends && Object.keys(redditTrends).length > 0) {
            console.log('✅ Reddit trending works!');
            console.log(`Found ${Object.keys(redditTrends).length} subreddits with trends`);
            
            // Show first trend
            const firstSubreddit = Object.keys(redditTrends)[0];
            const firstTrend = redditTrends[firstSubreddit][0];
            console.log(`Example: ${firstSubreddit} - "${firstTrend.title}"`);
        } else {
            console.log('❌ Reddit trending returned no data');
        }
    } catch (error) {
        console.log('❌ Reddit trending failed:', error.message);
    }
    
    console.log('\n' + '='.repeat(50) + '\n');
    
    // Test news headlines
    try {
        console.log('📰 Testing news headlines...');
        const newsTrends = await getNewsHeadlines('US');
        
        if (newsTrends && Object.keys(newsTrends).length > 0) {
            console.log('✅ News headlines work!');
            console.log(`Found ${Object.keys(newsTrends).length} news sources`);
            
            // Show first headline
            const firstSource = Object.keys(newsTrends)[0];
            const firstHeadline = newsTrends[firstSource][0];
            console.log(`Example: ${firstSource} - "${firstHeadline.title}"`);
        } else {
            console.log('❌ News headlines returned no data');
        }
    } catch (error) {
        console.log('❌ News headlines failed:', error.message);
    }
    
    console.log('\n' + '='.repeat(50) + '\n');
    
    // Test mock data
    try {
        console.log('🎭 Testing mock trends...');
        const mockTrends = getMockTrends('US');
        
        if (mockTrends && Object.keys(mockTrends).length > 0) {
            console.log('✅ Mock trends work!');
            console.log(`Found ${Object.keys(mockTrends).length} mock categories`);
            
            // Show first mock trend
            const firstCategory = Object.keys(mockTrends)[0];
            const firstMockTrend = mockTrends[firstCategory][0];
            console.log(`Example: ${firstCategory} - "${firstMockTrend.title}"`);
        } else {
            console.log('❌ Mock trends returned no data');
        }
    } catch (error) {
        console.log('❌ Mock trends failed:', error.message);
    }
    
    console.log('\n' + '='.repeat(50) + '\n');
    
    // Test main getTrends function
    try {
        console.log('🔄 Testing main getTrends function...');
        const allTrends = await getTrends('US');
        
        if (allTrends && Object.keys(allTrends).length > 0) {
            console.log('✅ Main getTrends function works!');
            console.log(`Found ${Object.keys(allTrends).length} trend categories`);
            
            // Show summary
            for (const [category, trends] of Object.entries(allTrends)) {
                console.log(`  📂 ${category}: ${trends.length} trends`);
            }
        } else {
            console.log('❌ Main getTrends function returned no data');
        }
    } catch (error) {
        console.log('❌ Main getTrends function failed:', error.message);
    }
}

// Reddit trending function
async function getRedditTrending() {
    try {
        const response = await axios.get('https://www.reddit.com/r/popular.json?limit=15', {
            headers: {
                'User-Agent': 'TrendBot/1.0'
            },
            timeout: 10000
        });

        const posts = response.data.data.children;
        const groupedTrends = {};

        posts.forEach(post => {
            const data = post.data;
            const subreddit = `r/${data.subreddit}`;
            
            if (!groupedTrends[subreddit]) {
                groupedTrends[subreddit] = [];
            }

            groupedTrends[subreddit].push({
                title: data.title,
                traffic: `${data.score} upvotes`,
                url: `https://reddit.com${data.permalink}`,
                snippet: data.selftext ? data.selftext.substring(0, 100) + '...' : 'Click to view discussion'
            });
        });

        return groupedTrends;
    } catch (error) {
        console.error('Reddit trending error:', error.message);
        throw error;
    }
}

// News headlines function
async function getNewsHeadlines(country) {
    try {
        const countryMap = {
            'US': 'us',
            'GB': 'gb', 
            'FR': 'fr',
            'DE': 'de',
            'ES': 'es',
            'JP': 'jp',
            'BR': 'br'
        };

        const region = countryMap[country] || 'us';
        
        const response = await axios.get(`https://saurav.tech/NewsAPI/top-headlines/category/general/${region}.json`, {
            timeout: 10000
        });

        const articles = response.data.articles.slice(0, 12);
        const groupedTrends = {};

        articles.forEach(article => {
            const source = article.source?.name || 'News Source';
            
            if (!groupedTrends[source]) {
                groupedTrends[source] = [];
            }

            groupedTrends[source].push({
                title: article.title,
                traffic: 'Breaking News',
                url: article.url,
                snippet: article.description || 'Latest news headline'
            });
        });

        return groupedTrends;
    } catch (error) {
        console.error('News headlines error:', error.message);
        throw error;
    }
}

// Mock trends function
function getMockTrends(country) {
    const mockData = {
        'TechCrunch': [
            {
                title: 'AI Development Trends 2024',
                traffic: '50K+ searches',
                url: 'https://techcrunch.com',
                snippet: 'Latest developments in artificial intelligence and machine learning'
            }
        ],
        'BBC News': [
            {
                title: 'Global Market Updates',
                traffic: '25K+ searches', 
                url: 'https://bbc.com/news',
                snippet: 'Latest financial and economic news from around the world'
            }
        ],
        'Reddit Discussions': [
            {
                title: 'Technology Innovations',
                traffic: '15K+ upvotes',
                url: 'https://reddit.com/r/technology',
                snippet: 'Community discussions about emerging technologies'
            }
        ]
    };

    console.log(`📋 Using mock trends data for ${country}`);
    return mockData;
}

// Main getTrends function
async function getTrends(country = 'US') {
    try {
        console.log(`📊 Fetching trends for ${country}...`);
        
        // Try Reddit trending first (most reliable)
        try {
            const redditTrends = await getRedditTrending();
            if (redditTrends && Object.keys(redditTrends).length > 0) {
                return redditTrends;
            }
        } catch (error) {
            console.log('Reddit trending failed, trying news...');
        }

        // Fallback to news headlines
        try {
            const newsTrends = await getNewsHeadlines(country);
            if (newsTrends && Object.keys(newsTrends).length > 0) {
                return newsTrends;
            }
        } catch (error) {
            console.log('News headlines failed, using mock data...');
        }

        // Final fallback - mock trending data
        return getMockTrends(country);
        
    } catch (error) {
        console.error('❌ Error fetching trends:', error.message);
        throw error;
    }
}

// Run the test
testNewTrends().catch(console.error);