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'use strict';

const mysql = require('mysql2');
const flags = require('mysql2/lib/constants/client.js');
const auth = require('mysql2/lib/auth_41.js');

function authenticate(params, cb) {
console.log(params);
const doubleSha = auth.doubleSha1('pass123');
const isValid = auth.verifyToken(
params.authPluginData1,
params.authPluginData2,
params.authToken,
doubleSha
);
if (isValid) {
cb(null);
} else {
// for list of codes lib/constants/errors.js
cb(null, { message: 'wrong password dude', code: 1045 });
}
}

const server = mysql.createServer();
server.listen(3333);
server.on('connection', (conn) => {
// we can deny connection here:
// conn.writeError({ message: 'secret', code: 123 });
// conn.close();
conn.serverHandshake({
protocolVersion: 10,
serverVersion: '5.6.10', // 'node.js rocks',
connectionId: 1234,
statusFlags: 2,
characterSet: 8,
// capabilityFlags: 0xffffff,
// capabilityFlags: -2113931265,
capabilityFlags: 2181036031,
authCallback: authenticate,
});

conn.on('field_list', (table, fields) => {
console.log('FIELD LIST:', table, fields);
conn.writeEof();
});

conn.on('query', (query) => {
conn.writeColumns([
{
catalog: 'def',
schema: 'test',
table: 'test_table',
orgTable: 'test_table',
name: 'beta',
orgName: 'beta',
characterSet: 33,
columnLength: 384,
columnType: 253,
flags: 0,
decimals: 0,
},
]);
conn.writeTextRow(['test тест テスト փորձարկում পরীক্ষা kiểm tra ']);
conn.writeTextRow(['ტესტი પરીક્ષણ מבחן פּרובירן اختبار परीक्षण']);
conn.writeEof();
conn.close();
});
});