import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

async function main() {
    console.log('🔄 Starting Database Diagnostics...');

    try {
        // 1. Test Connection
        console.log('1️⃣ Testing basic connection...');
        await prisma.$connect();
        console.log('✅ Connected to database successfully.');

        // 2. Test Lead Table Existence
        console.log('2️⃣ Testing Lead table access...');
        try {
            const count = await prisma.lead.count();
            console.log(`✅ Lead table found. Current count: ${count}`);
        } catch (e: any) {
            console.error('❌ FAILED to access Lead table.');
            if (e.code === 'P2021') {
                console.error('   👉 Error P2021: The table "Lead" does not exist in the current database.');
                console.error('   👉 SOLUTION: Run "npx prisma migrate deploy"');
            } else {
                console.error('   👉 Error:', e.message);
            }
            throw e; // rethrow to stop
        }

        // 3. Test Writing a dummy lead (optional, rolling back transaction)
        console.log('3️⃣ Testing write permission...');
        await prisma.$transaction(async (tx) => {
            const lead = await tx.lead.create({
                data: {
                    email: 'test_diagnostic_script@example.com',
                    source: 'diagnostic-script',
                    reprintCost: 0,
                    updatesPerYear: 0,
                    annualSavings: 0
                }
            });
            console.log('✅ Successfully created test lead with ID:', lead.id);
            // We purposefully throw an error to rollback this transaction so we don't dirty the DB
            throw new Error('ROLLBACK_TEST');
        }).catch((e) => {
            if (e.message === 'ROLLBACK_TEST') {
                console.log('✅ Transaction rollback successful (cleaning up test data).');
            } else {
                throw e;
            }
        });

        console.log('\n🎉 ALL CHECKS PASSED! The database is effectively readable and writable.');

    } catch (error) {
        console.error('\n💥 DIAGNOSTICS FAILED');
        console.error(error);
        process.exit(1);
    } finally {
        await prisma.$disconnect();
    }
}

main();