const wordCountOfTestText = 779;
resultButtonPoints = [
    {"name" : "question-points-1", "points" : 0},
    {"name" : "question-points-2", "points" : 0},
    {"name" : "question-points-3", "points" : 0},
    {"name" : "question-points-4", "points" : 0},
    {"name" : "question-points-5", "points" : 0},
    {"name" : "question-points-6", "points" : 0},
    {"name" : "question-points-7", "points" : 0},
];

const classifications = [
    {"sum":373,"rank":"1","points":23},
    {"sum":397,"rank":"1","points":22},
    {"sum":421,"rank":"1","points":21},
    {"sum":445,"rank":"1","points":20},
    {"sum":469,"rank":"1","points":19},
    {"sum":493,"rank":"1","points":18},
    {"sum":517,"rank":"1","points":17},
    {"sum":541,"rank":"1","points":16},
    {"sum":565,"rank":"1","points":15},
    {"sum":589,"rank":"1","points":14},
    {"sum":613,"rank":"1","points":13},
    {"sum":637,"rank":"1","points":12},
    {"sum":661,"rank":"1","points":11},
    {"sum":685,"rank":"1","points":10},
    {"sum":709,"rank":"1","points":9},
    {"sum":733,"rank":"1","points":8},
    {"sum":757,"rank":"1","points":7},
    {"sum":781,"rank":"1","points":6},
    {"sum":805,"rank":"1","points":5},
    {"sum":829,"rank":"1","points":4},
    {"sum":853,"rank":"1","points":3},
    {"sum":877,"rank":"1","points":2},
    {"sum":901,"rank":"1","points":1},
    {"sum":925,"rank":"1","points":0},
    {"sum":323,"rank":"2","points":23},
    {"sum":347,"rank":"2","points":22},
    {"sum":371,"rank":"2","points":21},
    {"sum":395,"rank":"2","points":20},
    {"sum":419,"rank":"2","points":19},
    {"sum":443,"rank":"2","points":18},
    {"sum":467,"rank":"2","points":17},
    {"sum":491,"rank":"2","points":16},
    {"sum":515,"rank":"2","points":15},
    {"sum":539,"rank":"2","points":14},
    {"sum":563,"rank":"2","points":13},
    {"sum":587,"rank":"2","points":12},
    {"sum":611,"rank":"2","points":11},
    {"sum":635,"rank":"2","points":10},
    {"sum":659,"rank":"2","points":9},
    {"sum":683,"rank":"2","points":8},
    {"sum":707,"rank":"2","points":7},
    {"sum":731,"rank":"2","points":6},
    {"sum":755,"rank":"2","points":5},
    {"sum":779,"rank":"2","points":4},
    {"sum":803,"rank":"2","points":3},
    {"sum":827,"rank":"2","points":2},
    {"sum":851,"rank":"2","points":1},
    {"sum":875,"rank":"2","points":0},
    {"sum":273,"rank":"3","points":23},
    {"sum":297,"rank":"3","points":22},
    {"sum":321,"rank":"3","points":21},
    {"sum":345,"rank":"3","points":20},
    {"sum":369,"rank":"3","points":19},
    {"sum":393,"rank":"3","points":18},
    {"sum":417,"rank":"3","points":17},
    {"sum":441,"rank":"3","points":16},
    {"sum":465,"rank":"3","points":15},
    {"sum":489,"rank":"3","points":14},
    {"sum":513,"rank":"3","points":13},
    {"sum":537,"rank":"3","points":12},
    {"sum":561,"rank":"3","points":11},
    {"sum":585,"rank":"3","points":10},
    {"sum":609,"rank":"3","points":9},
    {"sum":633,"rank":"3","points":8},
    {"sum":657,"rank":"3","points":7},
    {"sum":681,"rank":"3","points":6},
    {"sum":705,"rank":"3","points":5},
    {"sum":729,"rank":"3","points":4},
    {"sum":753,"rank":"3","points":3},
    {"sum":777,"rank":"3","points":2},
    {"sum":801,"rank":"3","points":1},
    {"sum":825,"rank":"3","points":0},
    {"sum":223,"rank":"4","points":23},
    {"sum":247,"rank":"4","points":22},
    {"sum":271,"rank":"4","points":21},
    {"sum":295,"rank":"4","points":20},
    {"sum":319,"rank":"4","points":19},
    {"sum":343,"rank":"4","points":18},
    {"sum":367,"rank":"4","points":17},
    {"sum":391,"rank":"4","points":16},
    {"sum":415,"rank":"4","points":15},
    {"sum":439,"rank":"4","points":14},
    {"sum":463,"rank":"4","points":13},
    {"sum":487,"rank":"4","points":12},
    {"sum":511,"rank":"4","points":11},
    {"sum":535,"rank":"4","points":10},
    {"sum":559,"rank":"4","points":9},
    {"sum":583,"rank":"4","points":8},
    {"sum":607,"rank":"4","points":7},
    {"sum":631,"rank":"4","points":6},
    {"sum":655,"rank":"4","points":5},
    {"sum":679,"rank":"4","points":4},
    {"sum":703,"rank":"4","points":3},
    {"sum":727,"rank":"4","points":2},
    {"sum":751,"rank":"4","points":1},
    {"sum":775,"rank":"4","points":0},
    {"sum":173,"rank":"5","points":23},
    {"sum":197,"rank":"5","points":22},
    {"sum":221,"rank":"5","points":21},
    {"sum":245,"rank":"5","points":20},
    {"sum":269,"rank":"5","points":19},
    {"sum":293,"rank":"5","points":18},
    {"sum":317,"rank":"5","points":17},
    {"sum":341,"rank":"5","points":16},
    {"sum":365,"rank":"5","points":15},
    {"sum":389,"rank":"5","points":14},
    {"sum":413,"rank":"5","points":13},
    {"sum":437,"rank":"5","points":12},
    {"sum":461,"rank":"5","points":11},
    {"sum":485,"rank":"5","points":10},
    {"sum":509,"rank":"5","points":9},
    {"sum":533,"rank":"5","points":8},
    {"sum":557,"rank":"5","points":7},
    {"sum":581,"rank":"5","points":6},
    {"sum":605,"rank":"5","points":5},
    {"sum":629,"rank":"5","points":4},
    {"sum":653,"rank":"5","points":3},
    {"sum":677,"rank":"5","points":2},
    {"sum":701,"rank":"5","points":1},
    {"sum":725,"rank":"5","points":0},
    {"sum":123,"rank":"6","points":23},
    {"sum":147,"rank":"6","points":22},
    {"sum":171,"rank":"6","points":21},
    {"sum":195,"rank":"6","points":20},
    {"sum":219,"rank":"6","points":19},
    {"sum":243,"rank":"6","points":18},
    {"sum":267,"rank":"6","points":17},
    {"sum":291,"rank":"6","points":16},
    {"sum":315,"rank":"6","points":15},
    {"sum":339,"rank":"6","points":14},
    {"sum":363,"rank":"6","points":13},
    {"sum":387,"rank":"6","points":12},
    {"sum":411,"rank":"6","points":11},
    {"sum":435,"rank":"6","points":10},
    {"sum":459,"rank":"6","points":9},
    {"sum":483,"rank":"6","points":8},
    {"sum":507,"rank":"6","points":7},
    {"sum":531,"rank":"6","points":6},
    {"sum":555,"rank":"6","points":5},
    {"sum":579,"rank":"6","points":4},
    {"sum":603,"rank":"6","points":3},
    {"sum":627,"rank":"6","points":2},
    {"sum":651,"rank":"6","points":1},
    {"sum":675,"rank":"6","points":0}

]

var startTime = null;
var wordsPerMinute = 0;


function startReadingTest() {
    document.getElementById("reading-text").style.display='block';
    startTime = new Date();
}

function stopReadingTest() {
    var endTime = new Date();
    var seconds = (endTime.getTime() - startTime.getTime()) / 1000;
    wordsPerMinute = calculateWordsPerTime(seconds)
    document.getElementById("reading-speed").innerHTML = wordsPerMinute
    document.getElementById("reading-result").style.display='block';
}

function showCorrectAnswers() {
    for (i = 1; i<8; i++) {
        try {
            document.getElementById("correct-answers-" + i).style.display='block';
        } catch (e) {
            // the hardcoed index could be wrong
        }
    }

    document.getElementById("show-correct-answers-button").style.display='none';
    document.getElementById("show-result-button").style.display='block';
    document.getElementById("question-1").scrollIntoView();
}

function showResult() {
    result = document.getElementById("result");
    result.style.display='inline';
    testresult = document.getElementById("test-result");
    testresult.style.display='block';
    var reachedPoints = calculateTestPoints()
    testresult.innerHTML = reachedPoints + " von 23";
    var rank = getReadingClassification(wordsPerMinute, reachedPoints)

    for (i = 1; i<7; i++) {
        document.getElementById("potential-" + i).className = "wrapper-ergebnis-1-col trans"; // set to transparent
        document.getElementById("potential-text-" + i).innerHTML = ""; // empty innerhtml
    }

    if (rank == 1) {
        document.getElementById("potential-" + rank).className = "wrapper-ergebnis-1-col orange"; // set to transparent
        document.getElementById("potential-text-" + rank).innerHTML = "<div class=\"text-ergebnis-1-col\">Ihre momentane Kompetenzstufe<br></div>";
    } else {
        step = rank == 2 ? 1 : 2;
        document.getElementById("potential-" + rank).className = "wrapper-ergebnis-1-col orange"; // set to transparent
        document.getElementById("potential-text-" + rank).innerHTML = "<div class=\"text-ergebnis-1-col\">Ihre momentane Kompetenzstufe<br></div>";

        var potential = rank - step;
        document.getElementById("potential-" + potential).className = "wrapper-ergebnis-1-col"; // set to transparent
        document.getElementById("potential-text-" + potential).innerHTML = "<div class=\"text-ergebnis-1-col\">Ihr Potenzial durch Deep Reading Training<br></div>";
    }

}

function addPoints(btn) {
    btnId = btn.id
    btnId = btnId.substring(0, btnId.length - 2);
    console.log(btnId)
    for( var i = 0, l = resultButtonPoints.length; i < l; i++ ) {
        idx = resultButtonPoints[i];
        if (idx.name == btnId) {
            var p = btn.id.substring(btn.id.length-1);
            idx.points = p;
        }
    }

    for (var i = 0; i < 10; i++) {
        try {
            document.getElementById(btnId + "-" + i).className = "point"
        } catch (e) {
            break
        }
    }
    for (var i = 0; i < 10; i++) {
        currentBtnId = btnId + "-" + i
        if (currentBtnId == btn.id) {
            try {
                document.getElementById(currentBtnId).className = "point point_selected"
            } catch (e) {
                break
            }
        }
    }
}

function calculateTestPoints() {
    points = 0;
    for( var i = 0, l = resultButtonPoints.length; i < l; i++ ) {
        idx = resultButtonPoints[i];
        points += parseInt(idx.points);
    }
    return points;
}

function calculateWordsPerTime(seconds) {
    minutes = (seconds % 3600) / 60
    return Math.round(wordCountOfTestText / minutes);
}

function displayTime (seconds) {
    const format = val => `0${Math.floor(val)}`.slice(-2)
    const minutes = (seconds % 3600) / 60
    return [minutes, seconds % 60].map(format).join(':')
}

function getReadingClassification(wpm, points) {
    let sum = wpm + points;
    var obj = null;
    var results = [];
    for (i = 0; i < classifications.length; i++) {
        if (classifications[i].points == points) {
            results.push(classifications[i].sum);
        }
    }

    var closest = results.reduce(function(prev, curr) {
        return (Math.abs(curr - sum) < Math.abs(prev - sum) ? curr : prev);
    });

    for (i = 0; i < classifications.length; i++) {
        if (classifications[i].sum == closest) {
            obj = classifications[i];
        }
    }

    if (obj == null) {
        //fallback
        return 6; // the last rank
    }

    return parseInt(obj.rank);
}