var submitted = false;
var pricingdata = null;
var _pricingIsLoading = false;

function isPricingLoading() {
    return _pricingIsLoading;
}

function setPricingIsLoading(state) {
    _pricingIsLoading = !!state;

    var loader = document.getElementById("pricingloader");
    if (loader) {
        loader.style = _pricingIsLoading ? "display: block;" : "display: none;"
    }
}

function loadPricingData() {
    var xmlhttp = new XMLHttpRequest();
    var url = "/assets/calculator/pricing.json";

    xmlhttp.onreadystatechange = function () {
        if (xmlhttp.readyState == 4) {
            setPricingIsLoading(false);

            if (xmlhttp.status == 200) {
                var spacedata = JSON.parse(xmlhttp.responseText);
                pricingdata = processData(spacedata);
            }
        }
    }
    setPricingIsLoading(true);
    xmlhttp.open("GET", url, true);
    xmlhttp.send();
}

function validateForm(slotlength, week1, week2, week3, previewwanted) {
    var valid = true;
    var weekcount = week1 + week2 + week3;

    if (slotlength < 60) {
        valid = false;
    }

    if (weekcount == 0) {
        valid = false;
        setResultVisible(false);
        document.getElementById("frmweek1").classList.add("is-invalid")
        document.getElementById("frmweek2").classList.add("is-invalid")
        document.getElementById("frmweek3").classList.add("is-invalid")
    } else {
        document.getElementById("frmweek1").classList.remove("is-invalid")
        document.getElementById("frmweek2").classList.remove("is-invalid")
        document.getElementById("frmweek3").classList.remove("is-invalid")
    }

    if (previewwanted && !week1) {
        valid = false;
    }
    else {
    }

    return valid;
}

function slotFee(spacedata, slotstart, duration, week1, week2, week3) {
    var fee = 0.0;

    var minsleft = duration;

    fee = spacedata['prices'].reduce(function (acc, pricing) {
        console.log(acc, pricing);
        if (slotstart < pricing['end'] && minsleft) {
            console.log('Adding Stuff');
            var pricinglen = pricing['end'] - pricing['start'];
            var startoffset = (pricing['start'] < slotstart) ? slotstart - pricing['start'] : 0;
            var minsrequired = (startoffset + minsleft > pricinglen) ? pricinglen - startoffset : minsleft;

            var hourlyrate = (week1 ? pricing['Week1'] : 0.0) + (week2 ? pricing['Week2'] : 0.0) + (week3 ? pricing['Week3'] : 0.0);

            console.log(slotstart, pricing['start'], pricinglen, startoffset, minsrequired, hourlyrate);

            acc = acc + (hourlyrate * minsrequired / 60);
            minsleft = minsleft - minsrequired;
            console.log(minsleft);
        }
        return acc;
    }, fee);

    return fee;
}

function estimateFee() {
    if (!pricingdata) {
        return false;
    }

    var perfspace = document.getElementById("frmspace").value;
    var performanceduration = parseInt(document.getElementById("frmperformanceduration").value, 10);
    
    
    // var getinduration = parseInt(document.getElementById("frmgetinduration").value, 10);
    // var getoutduration = parseInt(document.getElementById("frmgetoutduration").value, 10);

    // Take minimum in and out times from the space
    var getinduration = pricingdata[perfspace].min_getin
    var getoutduration = pricingdata[perfspace].min_getout

    var duration = performanceduration + getinduration + getoutduration;

    var showstartstr = document.getElementById("frmtime").value;
    var showstart = decodeTime(showstartstr);

    var slotstart = showstart - getinduration;

    var showend = showstart + performanceduration;
    var showendhrs = Math.floor(showend / 60);
    var showendmins = showend - (60 * showendhrs);
    // We do this now so that the minutes calculation is correct.
    if (showendhrs > 23) {
        showendhrs = showendhrs - 24;
    }
    var showendstr = (showendhrs < 10 ? '0' : '') + showendhrs + ':' + (showendmins < 10 ? '0' : '') + showendmins;

    var week1 = document.getElementById("frmweek1").checked;
    var week2 = document.getElementById("frmweek2").checked;
    var week3 = document.getElementById("frmweek3").checked;

    var weekcount = week1 + week2 + week3;

    var previewwanted = document.getElementById("frmpreview").checked;

    if (validateForm(duration, week1, week2, week3, previewwanted)) {
        var fee = slotFee(pricingdata[perfspace], slotstart, duration, week1, week2, week3);
        var discount = calculatediscount(weekcount);
        var previewfee = previewcost(perfspace, duration, previewwanted);

        displayFee(perfspace, week1, week2, week3, showstartstr, showendstr, getinduration, getoutduration, fee, discount, previewfee)
        return true;
    }
    else {
        return false;
    }
}

function displayFee(perfspace, week1, week2, week3, showstart, showend, getinduration, getoutduration, fee, discount, previewfee) {

    var weekcount = week1 + week2 + week3;

    //output performance space
    document.getElementById("performance-space3").innerHTML = perfspace;

    //output performance times (some hackery to pad hours/minutes with zeroes!)
    document.getElementById("performancestart").innerHTML = showstart;
    document.getElementById("performanceend").innerHTML = showend;

    //output get-in/-out durations

    document.getElementById("get-induration").innerHTML = getinduration;
    document.getElementById("get-outduration").innerHTML = getoutduration;

    //output details of weeks
    document.getElementById("weekcount").innerHTML = weekcount;
    document.getElementById("weeklist").innerHTML = weeklist(week1, week2, week3);

    //do some voodoo to ensure that plurals are consistent
    if (weekcount == 1) {
        document.getElementById("weekorweeks1").innerHTML = "week";
        document.getElementById("weekorweeks2").innerHTML = "week";
    }
    else {
        document.getElementById("weekorweeks1").innerHTML = "weeks";
        document.getElementById("weekorweeks2").innerHTML = "weeks";
    }

    if (previewfee > 0)
    //if we're having a preview, display it
    {
        document.getElementById("previewassumption").style.display = "list-item";
        document.getElementById("previewassumption").innerHTML = "You will be staging a preview performance on the Friday before Week 1 begins."
        document.getElementById("previewfee").style.display = "list-item";
        document.getElementById("previewamount").innerHTML = "&pound;" + previewfee.toFixed(0);
    }
    else
    //if not, hide it
    {
        document.getElementById("previewassumption").style.display = "none"
        document.getElementById("previewassumption").innerHTML = "You will not be staging a preview performance on the Friday before Week 1 begins."
        document.getElementById("previewfee").style.display = "none";
        document.getElementById("previewamount").innerHTML = "&pound;0.00";
    }

    //output the slotfee
    document.getElementById("slotamount").innerHTML = "&pound;" + fee.toFixed(0);

    if (discount > 0)
    //if a discount applies, display it
    {
        document.getElementById("discountpercent").innerHTML = discount;
        var discountamount = discount / 100.0 * fee
        document.getElementById("discountamount").innerHTML = "-&pound;" + discountamount.toFixed(0);
        document.getElementById("discount").style.display = "list-item"
    }
    else
    //if not, hide it.
    {
        document.getElementById("discountpercent").innerHTML = 0;
        document.getElementById("discountamount").innerHTML = 0.00;
        document.getElementById("discountamount").innerHTML = "-&pound;0.00";
        document.getElementById("discount").style.display = "none"
    }

    //output total fee
    var totalfee = fee - (discount / 100.0 * fee) + previewfee
    document.getElementById("totalamount").innerHTML = "&pound;" + totalfee.toFixed(0);

    setResultVisible(true);
}

function setResultVisible(visible) {
    document.getElementById("fee").style.display = visible ? "block" : "none"
    document.getElementById("breakdown").style.display = visible ? "block" : "none"
    document.getElementById("getestimatebutton").style.display = visible ? "none" : "block"

    // If we're setting not visible (invalid) then undo the submit state
    submitted = visible
}

function weeklist(week1, week2, week3) {
    var weekarray = [];
    if (week1)
        weekarray.push("1");
    if (week2)
        weekarray.push("2");
    if (week3)
        weekarray.push("3");
    if (weekarray.length == 1)
        return weekarray[0];
    else if (weekarray.length == 2)
        return weekarray[0] + " & " + weekarray[1];
    else
        return weekarray[0] + ", " + weekarray[1] + " & " + weekarray[2];
}

function previewcost(perfspace, showduration, previewwanted) {
    // pricing data will be set by the time this is called.
    if (previewwanted && pricingdata[perfspace] && pricingdata[perfspace]['previews']) {
        console.log(perfspace, pricingdata[perfspace]['previews'], showduration, pricingdata[perfspace]['previews'] * showduration / 60);
        // Per hour
        return pricingdata[perfspace]['previews'] * showduration / 60;
        //2023: Previews are fixed cost and not per hour
        //return pricingdata[perfspace]['previews'];
    }
    return 0.0; //no preview or bad venue!
}

function calculatediscount(weekcount) {
    if (weekcount == 2)			//5% discount for 2-week runs
        return 5;
    else if (weekcount == 3)	//10% discount for 3-week runs
        return 10;
    else						//no discount for 1-week run
        return 0;
}

function formchanged() {
    if (submitted) {
        if (pricingdata) {
            estimateFee();
        } else if (!isPricingLoading()) {
            loadPricingData();
        }
        // If the data is loading it will calculate when it completes because submitted is set.
    }
}

function submitclicked() {
    submitted = true;
    formchanged();

    // var loc = window.location;

    // if (!loc.hash) {
    //     loc.hash = 'estimate';
    //     window.location.replace(loc);
    // }
}

function setSelectedOption(el, value) {
    for (var i = 0; i < el.options.length; i++) {
        el.options[i].selected = (el.options[i].value == value);
    }
}

function decodeTime(timestr) {
    var parts = timestr.split(':');

    var hours = parseInt(parts[0], 10);
    var mins = parseInt(parts[1], 10);

    // Handle entries set for :59
    if (mins == 59) {
        mins = 0;
        hours = hours + 1;
    }

    // Handle fringe time
    if (hours < 6) {
        hours = hours + 24;
    }

    var offsetmins = (hours * 60) + mins;

    return offsetmins;
}

function processData(spacedata) {
    var processed = {};

    for (var space in spacedata) {
        processed[space] = {
            'previews': spacedata[space]['previews'],
            'min_getin': spacedata[space]['min_getin'],
            'min_getout': spacedata[space]['min_getout'],
            'prices': []
        }

        for (var index in spacedata[space]['prices']) {
            var priceinfo = spacedata[space]['prices'][index];

            pricedata = {}
            for (var pricekey in priceinfo) {
                pricedata[pricekey] = priceinfo[pricekey];
            }

            // Decoding the start and end to minutes past midnight makes checks easy
            pricedata['start'] = decodeTime(priceinfo['BlockStart']);
            pricedata['end'] = decodeTime(priceinfo['BlockEnd']);

            processed[space]['prices'].push(pricedata);
        }

        processed[space]['prices'].sort(function (a, b) {
            return a.start - b.start;
        });

        // This resets the first entry to the start of the day
        processed[space]['prices'][0]['start'] = 0;

        // This resets the last entry to the end of the day
        processed[space]['prices'][processed[space]['prices'].length - 1]['end'] = (24 + 6) * 60;
    }

    return processed;
}

function checkPreviewState() {
    if (document.getElementById("frmweek1").checked == true) {
        // If week 1 is ticked, enable the preview option
        document.getElementById("frmpreview").disabled = false
    }
    else {
        // Otherwise disable and clear it
        document.getElementById("frmpreview").disabled = true
        document.getElementById("frmpreview").checked = false
        formchanged();
    }
}

loadPricingData();