let mysql = require('mysql2');

let connection = mysql.createConnection({
    multipleStatements: true,
    host: 'localhost',
    user: 'root',
    password: '',
    database: 'salix'
});

let errorHandler = callback => {
    return error => {
        if (error)
            throw error;
        callback();
    };
};

let insertFixtures = (inserts, callback) => {
    connection.query(inserts[0], errorHandler(callback));
    // connection.query('SET FOREIGN_KEY_CHECKS = 1');
};

let truncate = (tables, callback) => {
    let truncatesSQL = tables.reduce((accumulator, currentValue, i) => {
        let sql = 'TRUNCATE TABLE ' + currentValue + '; ';
        return (`${accumulator}${sql}`);
    }, '');

    connection.query(truncatesSQL.slice(0, -2), errorHandler(callback));
};

connection.connect();

module.exports = function restoreFixtures(fixturesToApply, callback) {
    connection.query('SET FOREIGN_KEY_CHECKS = 0', () => {
        truncate(fixturesToApply.tables, () => {
            insertFixtures(fixturesToApply.inserts, callback);
        });
    });
};