var express = require("express");
var cookieParser = require("cookie-parser");
var app = express();

app.use(cookieParser());

var uuid = require("uuid/v4");
var mysql = require("mysql");

var con = mysql.createConnection({
    host: "localhost",
    user: "minis",
    password: "asIt90@6",
    database: "minis"
});

con.connect(err => {
    if (err) {
        console.log("Cant connect to MySQL database");
        throw err;
    }
    console.log("Connected to database!");
});


app.get('/', (req, res) => {
    res.send("Welcome to the miniplan api!");
});

app.get('/login', (req, res) => {
    var username = req.query.username;
    var password = req.query.password;


    if(username == undefined || password == undefined){
        res.send({success: false, error: "Missing parameters"});
        return;
    }

    username = username.toLowerCase();

    con.query("SELECT UserToken FROM ministranten WHERE Username='" + username + "'", (err, result) => {
        if(result[0]["UserToken"] == req.cookies.loginToken){
            res.send({success: true});
        }else{
            con.query("SELECT Passwort FROM ministranten WHERE Username='" + username + "'", (err, result) => {
                if (err) throw err;
                if(password == result[0]["Passwort"]){
                    var usertoken = uuid();
                    res.cookie("loginToken", usertoken);
                    con.query("UPDATE `ministranten` SET `UserToken` = '" + usertoken + "' WHERE `ministranten`.`Username` = '" + username + "';");
                    res.send({success: true, token: usertoken});
                }else{
                    res.send({success: false});
                }
            });
        }
    });
});

app.get("/user/:user/update", (req, res) => {

});


app.get("/gottesdienste", (req, res) => {
    var groupid = req.params.groupid;
    con.query("SELECT ID from gottesdienstgruppe ORDER BY ID DESC LIMIT 1", (err, result) => {
        if (err) throw err;
        con.query("SELECT * from gottesdienste WHERE GruppeID='" + result[0]["ID"] + "' ORDER BY `gottesdienste`.`Datum` ASC LIMIT 0 , 30 ", (err, result) => {
            if (err) throw err;
            res.send(JSON.stringify(result));
        });
    });

});

app.get("/gottesdienste/:groupid", (req, res) => {
    var groupid = req.params.groupid;
    con.query("SELECT * from gottesdienste WHERE GruppeID='" + groupid + "' ORDER BY  `gottesdienste`.`Datum` ASC LIMIT 0 , 30", (err, result) => {
        if (err) throw err;
        res.send(JSON.stringify(result));
    });
});

app.get("/groups", (req, res) => {
    con.query("SELECT * from gottesdienstgruppe ORDER BY  `gottesdienstGruppe`.`ID` DESC  LIMIT 0, 5", (err, result) => {
        if (err) throw err;
        res.send(JSON.stringify(result));
    });
});

app.get("/ministranten", (req, res) =>{
    
    con.query("SELECT UserToken FROM ministranten WHERE UserToken='" + req.cookies.loginToken + "'", (err, result) => {
        var loggedIn = result.length == 1;
        con.query("SELECT Name, Username FROM `ministranten`", (err, result) => {
            if (err) throw err;
            var minis = result;
            if(!loggedIn){
                for(var i = 0; i < minis.length; i++){
                    if(minis[i]["Name"] == "admin"){
                        minis.splice(0, 1);
                        i--;
                        continue;
                    }
                    minis[i]["Name"] = minis[i]["Name"].split(" ")[0].substring(0, 1) + ". " + minis[i]["Name"].split(" ")[1];
                }
            }else{
                minis.splice(0, 1);
            }

            for(var i = 0; i < minis.length; i++){
                attachToMini(minis[i])
            }

            res.send(JSON.stringify(minis));
        });
    });
});

var attachToMini = function(mini){
    mini.registered = [];
    con.query("SELECT * FROM `" + mini.Name.toLowerCase() + "` LIMIT 0 , 30", (err, data) => {
        for(var j = 0; j < data.length; j++){
            mini.registered[data[j]["GottesdienstIDs"]] = data[j]["Anwesend"];
        }
        console.log(JSON.stringify(mini));
    });
}


app.listen(3000, () => {
    console.log("API started!");
});



function removeFromArrayByValue(value, array) {
    var index = array.indexOf(value);
    if(index > -1){
        array.splice(index, 1);
    }
}

function removeFromArray(index, array) {
    var index = array.indexOf(value);
    if(index > -1){
        array.splice(index, 1);
    }
}