const { Pool } = require('pg');
require('dotenv').config();

const createTableQuery = `
CREATE TABLE IF NOT EXISTS participants (
    id SERIAL PRIMARY KEY,
    user_id INT UNIQUE REFERENCES users(id) ON DELETE SET NULL,
    email VARCHAR(255) UNIQUE NOT NULL,
    participant_name VARCHAR(255) NOT NULL,
    year INT CHECK (year BETWEEN 1 AND 4),
    department VARCHAR(255),
    phone_number VARCHAR(15),
    created_at TIMESTAMP DEFAULT NOW()
);
`;

async function createTable() {
    const pool = new Pool({
        connectionString: process.env.DATABASE_URL,
    });

    try {
        console.log('Connecting to the database...');
        const client = await pool.connect();

        console.log('Creating participants table if it does not exist...');
        await client.query(createTableQuery);

        console.log('Participants table created or already exists.');
        client.release();
    } catch (error) {
        console.error('Error creating participants table:', error);
    } finally {
        await pool.end();
    }
}

createTable();