var itemsList = {},
    clientsList = {},
    prevRow,
    prevCol = 0,
    tableHeader = document.getElementById('table-header'),
    docsWrapper = document.getElementById('docsWrapper'),
    mainWrapper = document.getElementById('main-wrapper'),
    firstDateInput = document.getElementById('firstDate'),
    clientSelect = document.getElementById('clientSelect'),
    secDateInput = document.getElementById('secDate'),
    checkBox = document.getElementById('checkBox'),
    clientsWithDocsBtn = document.getElementById('all-clients-with-docs'),
    table = document.getElementById('table');

//Extract all items and clients from the main JSON and put them into two associative arrays
function generateRef(obj) {
    for (var a = 0; a < obj.length; a++) {
        var currentDate = obj[a].docDate;
        if (checkIfDateIsValid(currentDate.slice(6, currentDate.length), currentDate.slice(4, 6), currentDate.slice(0, 4))) {
            fillclientsList(obj[a].client, obj[a]);
            for (var b = 0; b < obj[a].Items.length; b++) {
                checkItems(obj[a].client, obj[a].Items[b]);
            }
        }
    }
}

//on every merchandise if array fill clients that have it with whole quantity
function checkItems(client, march) {
    if (itemsList[march.name]) {
        if (itemsList[march.name][client]) {
            itemsList[march.name][client] = Number(itemsList[march.name][client]) + Number(march.quantity);
        } else {
            itemsList[march.name][client] = Number(march.quantity);
        }
    } else {
        itemsList[march.name] = {};
        itemsList[march.name][client] = Number(march.quantity);
    }
}

//all clients with theys documents and full info on document
function fillclientsList(name, obj) {
    var Items = {};
    if (clientsList[name]) {
        if (clientsList[name][obj.docNumber]) {
            return;
        } else {
            clientsList[name][obj.docNumber] = {
                docDate: obj.docDate,
            };
        }
    } else {
        clientsList[name] = {};
        clientsList[name][obj.docNumber] = {
            docDate: obj.docDate,
        };
    }
    for (var i = 0; i < obj.Items.length; i++) {
        if (Items[obj.Items[i].name]) {
            Items[obj.Items[i].name].quantity += Number(obj.Items[i].quantity);
        } else {
            Items[obj.Items[i].name] = {};
            Items[obj.Items[i].name].quantity = Number(obj.Items[i].quantity);
        }
    }
    clientsList[name][obj.docNumber]['Items'] = Items;

}

function buildTable(reUse) {
    function fillHeader() {
        var strArray = ['<div class="table-row"><div class="plain-cell">&nbsp;</div><div class="plain-cell">No</div>'],
            docArr = ['<div class="table-row"><div class="plain-cell">Док. номер</div><div class="plain-cell">&nbsp;</div>'],
            docDate = ['<div class="table-row"><div class="plain-cell">Док. дата</div><div class="plain-cell">&nbsp;</div>'];
        for (var key in clientsList) {
            if (reUse) {
                for (var prop in clientsList[key]) {
                    var date = clientsList[key][prop].docDate;
                    strArray.push('<div class="plain-cell no-print">' + key + '</div>')
                    docArr.push('<div class="plain-cell">' + prop + '</div>');
                    docDate.push('<div class="plain-cell">' + date.substr(0, 4) + '.' + date.substr(4, 2) + '.' + date.substr(6, 2) + '</div>');
                }
            }
            else {
                strArray.push('<div class="plain-cell no-print">' + key + '</div>');
            }
        }
        docArr.push('<div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div></div>')
        docDate.push('<div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div></div>')
        strArray.push('<div class="plain-cell">Общо планирани</div><div class="plain-cell">Количество от склад</div><div class="plain-cell">Блокирани</div><div class="plain-cell">Разлика</div></div>');
        if (reUse) {
            docArr.push('</div>');
            docDate.push('</div>');
            docsWrapper.innerHTML = docArr.join('') + docDate.join('');
        }
        tableHeader.innerHTML = strArray.join('');
        resizeConteiners(tableHeader.children[0].children.length * 70 + 150);
    }
    fillHeader();

    function fillRows() {
        var strArray = [],
            counter = 1,
            totalRowItems = 0;

        for (var key in itemsList) {

            strArray.push('<div class="table-row"><div class="plain-cell">' + key + '</div><div class="plain-cell">' + counter + '</div>')
            for (var name in clientsList) {
                if (reUse) {
                    var result = expandedRows(clientsList[name], key);
                    strArray.push(result.html);
                    totalRowItems += result.quantity;
                    continue;
                }
                if (itemsList[key][name]) {
                    strArray.push('<div class="plain-cell no-print">' + itemsList[key][name] + '</div>')
                    totalRowItems += Number(itemsList[key][name]);
                } else {
                    strArray.push('<div class="plain-cell no-print">&nbsp;</div>')
                }
            }
            var calculateQuantity = store[key].quantity - store[key].blocked - totalRowItems;
            strArray.push('<div class="plain-cell">' + totalRowItems + '</div><div class="plain-cell">' + store[key].quantity + '</div>' +
                          '<div class="plain-cell">' + store[key].blocked + '</div>' +
                          '<div class="plain-cell">' + calculateQuantity + '</div></div>');
            counter++;
            totalRowItems = 0;
        }
        while (table.firstChild) {
            table.removeChild(table.firstChild);
        }
        table.innerHTML = strArray.join('');
        if (reUse) {
            printTotalQuantity(clientsList, 1)
        }
        else {
            printTotalQuantity(clientsList, 3);
        }
    }
    fillRows();
}

//expands basic table after click on chechbox
function expandedRows(obj, itemName) {
    var strArray = [];
    totalRowItems = 0;
    for (var key in obj) {
        if (obj[key].Items[itemName]) {
            strArray.push('<div class="plain-cell no-print">' + obj[key].Items[itemName].quantity + '</div>');
            totalRowItems += Number(obj[key].Items[itemName].quantity);
        } else {
            strArray.push('<div class="plain-cell no-print">&nbsp;</div>');
        }
    }
    return {
        html: strArray.join(''),
        quantity: totalRowItems
    }
}


//Visualize all documents from client chosen by click on the header
tableHeader.addEventListener('click', function (e) {
    var target = e.target.innerText,
        checkBiggerWidth = 0;
    if (target == 'No' || target == 'Общо планирани' || target == 'Количество от склад' ||
        target == 'Блокирани' || target == 'Разлика' || target.trim() == '') {
        return;
    }
    docsWrapper.style.display = '';
    changeHeaderAfterClick(target);
    clientsWithDocsBtn.disabled = true;
    resizeConteiners(docsWrapper.childNodes[0].childElementCount * 70 + 150)

    if (target == 'Всички') {
        clientsWithDocsBtn.disabled = false;
        if (!checkBox.checked) {
            checkBox.click();
        }
        if (clientsWithDocsBtn.checked) {
            buildTable(true);
            return;
        }
        docsWrapper.style.display = 'none';
        buildTable();
    }
});

//after click on some cell change color of a cell row and col
table.addEventListener('click', function (ev) {
    if (ev.target.className == 'plain-cell no-print') {
        var currentCellIndex = ev.target.previousSibling,
        rows = table.getElementsByClassName('table-row');


        if (prevCol <= rows[0].children.length) {
            for (var z = 0; z < rows.length; z++) {
                rows[z].children[prevCol].style.backgroundColor = '';
            }
        }
        prevCol = Array.prototype.indexOf.call(ev.target.parentNode.childNodes, ev.target);
        for (var z = 0; z < rows.length; z++) {
            rows[z].children[prevCol].style.backgroundColor = 'lightBlue';
        }

        if (prevRow) {
            prevRow.style.backgroundColor = '';
        }
        prevRow = ev.target.parentNode;
        prevRow.style.backgroundColor = 'lightblue';
        ev.target.style.backgroundColor = '#bde0eb';
    }
});

//fill table with data for clicked client
function fillTableAfterClick(targetName) {
    var strArray = [],
        invoiceNumber = [],
        invoiceDate = [],
        rowCounter = 1,
        iterationCounter = 0,
        countRowItems = 0,
        allItems = 0;

    invoiceNumber.push('<div class="table-row no-print"><div class="plain-cell">Док.ном</div><div class="plain-cell">&nbsp;</div>')
    invoiceDate.push('<div class="table-row no-print"><div class="plain-cell">Дата</div><div class="plain-cell">&nbsp;</div>')

    var itemsArr = extractItemsFromClient(clientsList[targetName]);
    for (var name in itemsArr) {
        strArray.push('<div class="table-row"><div class="plain-cell">' + name + '</div><div class="plain-cell">' + rowCounter + '</div>');

        for (var key in clientsList[targetName]) {
            if (iterationCounter < Object.keys(clientsList[targetName]).length) {
                var currentDate = clientsList[targetName][key].docDate;
                invoiceNumber.push('<div class="plain-cell">' + key + '</div>')
                invoiceDate.push('<div class="plain-cell">' + currentDate.slice(6, currentDate.length) + '.' + currentDate.slice(4, 6) + '.' + currentDate.slice(0, 4) + '</div>')
            }
            if (clientsList[targetName][key].Items[name]) {
                strArray.push('<div class="plain-cell no-print">' + clientsList[targetName][key].Items[name].quantity + '</div>');
                countRowItems += Number(clientsList[targetName][key].Items[name].quantity);
            } else {
                strArray.push('<div class="plain-cell no-print">&nbsp;</div>');
            }
            iterationCounter++;
        }
        var quantitydifference = Number(store[name].quantity) - Number(store[name].blocked) - countRowItems;
        strArray.push('<div class="plain-cell">' + countRowItems + '</div><div class="plain-cell">' + store[name].quantity + '</div>' +
            '<div class="plain-cell">' + store[name].blocked + '</div><div class="plain-cell">' + quantitydifference + '</div>');
        allItems += countRowItems;
        strArray.push('</div>');
        countRowItems = 0;
        rowCounter++;
    }

    invoiceNumber.push('<div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div></div>')
    invoiceDate.push('<div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div></div>')
    docsWrapper.innerHTML = invoiceNumber.join('') + invoiceDate.join('');
    table.innerHTML = strArray.join('');
    printTotalQuantity(clientsList[targetName], 2);
}

//fill footer with calculated data from colums
function printTotalQuantity(obj, check) {
    var strArray = ['<div class="table-row"><div class="plain-cell">Общо</div><div class="plain-cell">&nbsp;</div>'],
        docQuantity = 0,
        allItems = 0;


    if (check === 1) {
        for (var i in clientsList) {
            getQuantity(clientsList[i], true);
        }
    }
    else if (check === 2) {
        getQuantity(obj, true)
    }

    else if (check === 3) {
        for (var z in obj) {
            getQuantity(obj[z], false)
        }
    }

    function getQuantity(obj, allDocs) {
        for (var prop in obj) {
            for (var item in obj[prop].Items) {
                docQuantity += Number(obj[prop].Items[item].quantity);
            }
            if (allDocs) {
                strArray.push('<div class="plain-cell no-print">' + docQuantity + '</div>');
                allItems += docQuantity;
                docQuantity = 0;
            }
        }
        if (!allDocs) {
            strArray.push('<div class="plain-cell no-print">' + docQuantity + '</div>');
            allItems += docQuantity;
            docQuantity = 0;
        }
    }
    strArray.push('<div class="plain-cell">' + allItems + '</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div><div class="plain-cell">&nbsp;</div></div>');
    table.innerHTML += strArray.join('');
}

//extract only items that are in all clients
function extractItemsFromClient(client) {
    var result = {};
    for (var doc in client) {
        for (var item in client[doc].Items) {
            if (!result[item]) result[item] = {};
        }
    }
    return result;
}

document.getElementById('show-reference').addEventListener('click', checkIfDatesInputAreActive);

document.getElementById('firstDate').addEventListener('change', fillSelectWithClients);

document.getElementById('secDate').addEventListener('change', fillSelectWithClients);


function fillSelectWithClients() {
    var strArray = [];
    if (firstDateInput.value && secDateInput.value) {
        strArray.push('<option>Всички</option>');
        itemsList = {};
        clientsList = {};
        generateRef(json);

        for (var name in clientsList) {
            strArray.push('<option>' + name + '</option>');
        }
    }
    clientSelect.innerHTML = strArray.join('');
}

//change header with only clicked client name and empty cells; call fillTableAfterClick with client name
function changeHeaderAfterClick(name) {
    tableHeader.innerHTML = '<div class="table-row"><div class="plain-cell">&nbsp;</div><div class="plain-cell">No</div><div class="plain-cell no-print">' + name + '</div><div class="plain-cell no-print" id="empty-cell"></div><div class="plain-cell">Общо планирани</div>' +
                    '<div class="plain-cell">Количество от склад</div><div class="plain-cell">Блокирани</div><div class="plain-cell">Разлика</div></div>';
    fillTableAfterClick(name);
    tableHeader.childNodes[0].firstChild.innerText = 'Всички';
}

function checkIfDatesInputAreActive() {
    var clientSelectValue = clientSelect.options[clientSelect.selectedIndex].innerText;
    if (firstDateInput.value && secDateInput.value) {
        checkBox.disabled = false;
        if (clientSelectValue != 'Всички') {
            docsWrapper.style.display = '';
            changeHeaderAfterClick(clientSelectValue);
            fillTableAfterClick(clientSelectValue);
            if (!checkBox.checked) {
                checkBox.click();
            }
            resizeConteiners(docsWrapper.children[0].childElementCount * 70 + 150)
            return;
        }

        clientsList = {};
        itemsList = {};

        generateRef(json);
        if (!checkBox.checked) {
            checkBox.click();
        }
        if (clientsWithDocsBtn.checked) {
            clientsWithDocsBtn.click();
        }
        if (clientsWithDocsBtn.disabled) {
            clientsWithDocsBtn.disabled = false;
        }
        docsWrapper.style.display = 'none';
        buildTable();
    }
}

//find only dates that are in range
function checkIfDateIsValid(day, month, year) {
    var firstDateInput = document.getElementById('firstDate'),
      secDateInput = document.getElementById('secDate'),
      regEx = /[0-9]+/g,
      firstDateArray,
      secDateArray;

    firstDateArray = firstDateInput.value.match(regEx);
    secDateArray = secDateInput.value.match(regEx);
    if (firstDateArray && secDateArray) {
        var prevDate = new Date(firstDateArray[0], (firstDateArray[1] - 1), firstDateArray[2], 0, 0, 0, 0);
        var currentDate = new Date(secDateArray[0], (secDateArray[1] - 1), secDateArray[2], 0, 0, 0, 0);

        if (prevDate > currentDate) {
            return;
        }

        var productDate = new Date(year, (Number(month) - 1), Number(day), 0, 0, 0, 0);
        if (productDate.valueOf() >= prevDate.valueOf() && productDate.valueOf() <= currentDate.valueOf()) {
            return true;
        } else {
            return false;
        }
    }
}

checkBox.addEventListener('change', function () {
    if (!this.checked) {
        document.head.innerHTML += '<style>.no-print{display:none}</style>';
        resizeConteiners(table.offsetWidth);
        docsWrapper.style.display = 'none';
    }
    else {
        document.head.removeChild(document.getElementsByTagName('style')[0]);
        resizeConteiners(table.childNodes[0].childElementCount * 70 + 150);
        if (clientsWithDocsBtn.checked) {
            docsWrapper.style.display = '';
        } else {
            docsWrapper.style.display = 'none';
        }
    }

});

clientsWithDocsBtn.addEventListener('change', function () {
    if (this.checked) {
        buildTable(true)
        docsWrapper.style.display = '';
        if (!checkBox.checked) checkBox.click();
    }
    else {
        buildTable();
        resizeConteiners(table.offsetWidth);
        docsWrapper.style.display = 'none';
    }
});

function resizeConteiners(size) {
    docsWrapper.style.width = size + 'px';
    mainWrapper.style.width = size + 2 + 'px';
    tableHeader.childNodes[0].style.width = size + 'px';

    if (docsWrapper.childElementCount == 0) {
        return;
    }
    if (document.getElementById('empty-cell') == undefined) {
        return;
    }
    document.getElementById('empty-cell').style.width = (docsWrapper.offsetWidth - 640) + 'px';
    if (docsWrapper.children[0].children.length <= 7) {
        document.getElementById('empty-cell').style.display = 'none'
    }
}