const mysql = require('mysql2/promise')
require('dotenv').config()

module.exports = rewardRedemption = (async (viewer_id, viewer_name) => {
	// Create a connection to the MySQL database
	const connection = await mysql.createConnection({
		host: process.env.MYSQL_HOST,
		port: process.env.MYSQL_PORT,
		user: process.env.MYSQL_USER,
		password: process.env.MYSQL_PASSWORD,
		database: process.env.MYSQL_DATABASE
	})

	const result = {}
	
	// Check if the viewer already exists in the rewards table
	await connection.query('SELECT * FROM rewards WHERE viewer_id = ?', [viewer_id])
		.then(async ([rows, fields]) => {
			if (rows.length === 0) {
				// Viewer doesn't exist, insert a new row

				let sql_data = { viewer_id, viewer_name, count: 1, current_count: 1 }

				await connection.query('INSERT INTO rewards SET ?', sql_data).catch(error => { console.error(error) })
				return result.status = 'insert_entry'
			} else {
				// Viewer exists, update the count
				result.count = rows[0].count + 1
				result.current_count = rows[0].current_count + 1

				let sql_data = { count: result.count, current_count: result.current_count }
				
				await connection.query('UPDATE rewards SET ? WHERE viewer_id = ?', [sql_data, viewer_id]).catch(error => { console.error(error) })
				return result.status = 'update_entry'
			}
		}).catch(error => { console.error(error) })

	// Terminate the connection to the database
	await connection.end()

	//return [newRow.current_count, newRow.count]
	return result
})