var mysql = require('mysql');
var moment = require('moment');
var config = require('./config');
var mongoClient = require('mongodb').MongoClient;

var mysqlClient = mysql.createConnection(config.mysql);

mysqlClient.connect(function(error) {
    if (error) return;
    //console.log("connected to MySQL");
});


var start_date = moment().add(-1, 'days').format('YYYY-MM-DD');//'2017-11-11';
var end_date   = moment().add(-1, 'days').format('YYYY-MM-DD');//'2018-01-03';

console.log(moment().format('YYYY-MM-DD HH:mm:ss') + " => sync minutely data from " + start_date + " to " + end_date);

var days = moment(end_date).diff(moment(start_date), 'days');
for (var i = 0; i <= days; i++) {
    var date_day = moment(start_date).add(i, "days");
    for(var j = 0; j < 24; j++) {
        var date_hour = moment(date_day).add(j, "hours").format("YYYY-MM-DD HH:00:00");
        for(var k = 0; k < 60; k++) {
            var start = moment(date_hour).add(k, 'minutes').format("YYYY-MM-DD HH:mm:00");
            var end = moment(date_hour).add(k+1, 'minutes').format("YYYY-MM-DD HH:mm:00");
            //console.log(start + " : " + end);

            fetchDeviceMinutelyData(start, end);
        }
    }
}

mysqlClient.end();

function fetchDeviceMinutelyData(start, end) {
    var devices = {};
    var sql = "SELECT mac, mac_key, avg(mac_value) as avg_val, min(mac_value) as min_val, max(mac_value) as max_val FROM history WHERE time >= '" + start + "' AND time < '" + end + "' GROUP BY mac, mac_key ORDER BY mac";
    //console.log(sql);
    mysqlClient.query(sql, function (error, results, fields) {
        if (error) throw error;

        results.forEach(function(data) {
            var mac = data.mac;
            var key = data.mac_key;
            var val = data.avg_val;
            if(devices[mac] == null) {
                devices[mac] = {
                    mac: mac,
                    time: moment(moment(start, 'YYYY-MM-DD HH:mm:00').valueOf() + 8*60*60*1000).toDate()
                };
            }
            devices[mac][key] = val;

            if(devices[mac]["ext"] == null) {
                devices[mac]["ext"] = {};
            }
            devices[mac]["ext"][key] = [data.min_val, data.max_val]
        });

        var device_data = [];
        for(var mac in devices) {
            device_data.push(devices[mac]);
        }

        // console.log(JSON.stringify(device_data));
        if(device_data.length > 0) {
            insertDeviceData(device_data);
        }
    });
}

function insertDeviceData(docs) {
    mongoClient.connect(config.mongo, {
        poolSize: 10,
        keepAlive: 300000,
        auto_reconnect: true,
        reconnectTries: 1000,
        reconnectInterval: 5000,
        connectTimeoutMS: 30000
    }, function(err, client) {
        if (err) {
            console.log(err.message);
            return;
        }
        client.db('monitor').collection('data_minutely').insertMany(docs, function(err2, doc2) {
            if (err2) {
                console.log(err2.message);
                return;
            }
            client.close();
        });
    });
}