/**
 * Test script to verify database setup is working correctly
 * This script tests the database connection, schema creation, and basic operations
 */

require('dotenv').config();
const dbConnection = require('./src/database/connection');
const dbInitializer = require('./src/database/init');
const dbUtils = require('./src/database/utils');

async function testDatabaseSetup() {
    console.log('🧪 Testing Database Setup...\n');
    
    let testsPassed = 0;
    let testsTotal = 0;
    
    function test(name, condition) {
        testsTotal++;
        if (condition) {
            console.log(`✅ ${name}`);
            testsPassed++;
        } else {
            console.log(`❌ ${name}`);
        }
    }
    
    try {
        // Test 1: Database Connection
        console.log('1. Testing database connection...');
        await dbConnection.connect();
        test('Database connection established', dbConnection.isConnected);
        
        // Test 2: Health Check
        console.log('\n2. Testing health check...');
        const health = await dbConnection.healthCheck();
        test('Health check returns healthy status', health.healthy);
        test('Connection pool is configured', health.poolSize >= 0);
        
        // Test 3: Database Initialization
        console.log('\n3. Testing database initialization...');
        await dbInitializer.initialize();
        const status = await dbInitializer.getStatus();
        test('Database initialization completed', status.healthy);
        test('Migrations table exists', status.migrations.total >= 0);
        
        // Test 4: Schema Validation
        console.log('\n4. Testing schema validation...');
        const validation = await dbUtils.validateSchema();
        test('Schema validation passes', validation.valid);
        test('Required tables exist', validation.errors.length === 0);
        
        // Test 5: Table Operations
        console.log('\n5. Testing table operations...');
        const usersExist = await dbUtils.tableExists('users');
        const bookmarksExist = await dbUtils.tableExists('bookmarks');
        test('Users table exists', usersExist);
        test('Bookmarks table exists', bookmarksExist);
        
        // Test 6: Basic Query Operations
        console.log('\n6. Testing query operations...');
        const queryResult = await dbConnection.query('SELECT 1 as test');
        test('Basic query execution works', queryResult.rows[0].test === 1);
        
        // Test 7: Transaction Support
        console.log('\n7. Testing transaction support...');
        let transactionWorked = false;
        try {
            await dbConnection.transaction(async (client) => {
                await client.query('SELECT 1');
                transactionWorked = true;
            });
        } catch (error) {
            console.error('Transaction test failed:', error);
        }
        test('Transaction support works', transactionWorked);
        
        // Test 8: Connection Pool Stats
        console.log('\n8. Testing connection pool...');
        const stats = dbConnection.getStats();
        test('Connection pool statistics available', stats.connected);
        test('Pool configuration is correct', stats.config && stats.config.max > 0);
        
        // Summary
        console.log('\n📊 Test Results:');
        console.log(`✅ Passed: ${testsPassed}/${testsTotal}`);
        console.log(`❌ Failed: ${testsTotal - testsPassed}/${testsTotal}`);
        
        if (testsPassed === testsTotal) {
            console.log('\n🎉 All database tests passed! Setup is working correctly.');
        } else {
            console.log('\n⚠️  Some tests failed. Check the output above for details.');
        }
        
        // Display diagnostics
        console.log('\n🔍 Database Diagnostics:');
        const diagnostics = await dbUtils.diagnostics();
        console.log(JSON.stringify(diagnostics, null, 2));
        
    } catch (error) {
        console.error('\n❌ Database test failed:', error.message);
        
        if (error.code === 'ECONNREFUSED') {
            console.log('\n💡 PostgreSQL is not running. To fix this:');
            console.log('1. Install PostgreSQL if not already installed');
            console.log('2. Start PostgreSQL service');
            console.log('3. Create database: createdb bookmark_manager');
            console.log('4. Update .env file with correct credentials');
        }
        
        process.exit(1);
    } finally {
        await dbConnection.close();
    }
}

// Run the test
testDatabaseSetup();