var flowy = function (canvas, grab, release, snapping, rearrange, spacing_x, spacing_y) {
    try {
        if (!grab) {
            grab = function () { };
        }
        if (!release) {
            release = function () { };
        }
        if (!snapping) {
            snapping = function () {
                return true;
            }
        }
        if (!rearrange) {
            rearrange = function () {
                return false;
            }
        }
        if (!spacing_x) {
            spacing_x = 20;
        }
        if (!spacing_y) {
            spacing_y = 80;
        }
        if (!Element.prototype.matches) {

            Element.prototype.matches = Element.prototype.msMatchesSelector ||
                Element.prototype.webkitMatchesSelector;
        }
        if (!Element.prototype.closest) {

            Element.prototype.closest = function (s) {
                var el = this;
                do {
                    if (Element.prototype.matches.call(el, s)) return el;
                    el = el.parentElement || el.parentNode;
                } while (el !== null && el.nodeType === 1);
                return null;
            };
        }
        var loaded = false;
        flowy.load = function () {
            if (!loaded)
                loaded = true;
            else
                return;
            var blocks = [];
            var blockstemp = [];
            var canvas_div = canvas;
            var absx = 0;
            var absy = 0;
            if (window.getComputedStyle(canvas_div).position == "absolute" || window.getComputedStyle(canvas_div).position == "fixed") {
                absx = canvas_div.getBoundingClientRect().left;
                absy = canvas_div.getBoundingClientRect().top;
            }
            var active = false;
            var paddingx = spacing_x;
            var paddingy = spacing_y;
            var offsetleft = 0;
            var rearrange = false;
            var drag, dragx, dragy, original;
            var mouse_x, mouse_y;
            var dragblock = false;
            var prevblock = 0;
            var el = document.createElement("DIV");
            el.classList.add('indicator');
            el.classList.add('invisible');
            canvas_div.appendChild(el);
            flowy.import = function (output) {
                debugger
                canvas_div.innerHTML = output.html;
                for (var a = 0; a < output.blockarr.length; a++) {
                    blocks.push({
                        childwidth: parseFloat(output.blockarr[a].childwidth),
                        parent: parseFloat(output.blockarr[a].parent),
                        id: parseFloat(output.blockarr[a].id),
                        x: parseFloat(output.blockarr[a].x),
                        y: parseFloat(output.blockarr[a].y),
                        width: parseFloat(output.blockarr[a].width),
                        height: parseFloat(output.blockarr[a].height)
                    })
                }
                if (blocks.length > 1) {
                    rearrangeMe();
                    checkOffset();
                }
            }
            flowy.output = function () {
                var html_ser = canvas_div.innerHTML;
                var json_data = {
                    html: html_ser,
                    blockarr: blocks,
                    blocks: []
                };
                if (blocks.length > 0) {
                    for (var i = 0; i < blocks.length; i++) {
                        json_data.blocks.push({
                            id: blocks[i].id,
                            parent: blocks[i].parent,
                            data: [],
                            attr: []
                        });
                        var blockParent = document.querySelector(".blockid[value='" + blocks[i].id + "']").parentNode;
                        blockParent.querySelectorAll("input").forEach(function (block) {
                            var json_name = block.getAttribute("name");
                            var json_value = block.value;
                            json_data.blocks[i].data.push({
                                name: json_name,
                                value: json_value
                            });
                        });
                        //Customized To Get Block Id of Class .blockyinfo
                        blockParent.querySelectorAll(".blockyinfo").forEach(function (block) {
                            var json_name = block.innerHTML;
                            var json_value = block.id;
                            json_data.blocks[i].data.push({
                                name: json_name,
                                value: json_value
                            });
                        });
                        Array.prototype.slice.call(blockParent.attributes).forEach(function (attribute) {
                            var jsonobj = {};
                            jsonobj[attribute.name] = attribute.value;
                            json_data.blocks[i].attr.push(jsonobj);
                        });
                    }
                    return json_data;
                }
            }
            //flowy.deleteBlocks = function () {
            //    blocks = [];
            //    canvas_div.innerHTML = "<div class='indicator invisible'></div>";
            //}
            flowy.deleteBlock = function (id, removeChildren) {
                //Track orginal parent
                let newParentId;

                if (!Number.isInteger(id)) {
                    id = parseInt(id);
                }
                for (var i = 0; i < blocks.length; i++) {
                    if (blocks[i].id === id) {
                        newParentId = blocks[i].parent;
                        removeBlockEls(blocks[i].id, blocks[i].parent);
                        blocks.splice(i, 1);
                        modifyChildBlocks(id);
                        break;
                    }
                }
                rearrangeMe();
                function modifyChildBlocks(parentId) {
                    let children = [];
                    for (var i = blocks.length - 1; i >= 0; i--) {
                        if (blocks[i].parent === parentId) {
                            children.push(blocks[i].id);
                            if (removeChildren === true) {
                                removeBlockEls(blocks[i].id, blocks[i].parent);
                                blocks.splice(i, 1);
                            } else {
                                blocks[i].parent = newParentId;
                                rearrange = true;
                                document.querySelector(".arrowid[value='" + blocks[i].id + "']").parentNode.remove();
                                blockstemp = [];
                                blockstemp.push(blocks.filter(a => a.id == blocks[i].id)[0]);
                                snap(document.querySelector(".blockid[value='" + blocks[i].id + "']").parentNode, newParentId, blocks.map(a => a.id));
                                rearrange = false;
                            }
                        }
                    }
                    //Only call repeat of function if removing children
                    if (removeChildren === true) {
                        for (var i = 0; i < children.length; i++) {
                            modifyChildBlocks(children[i]);
                        }
                    }
                }
                function removeBlockEls(id, parentid) {
                    if (parentid == -1) {
                        document.querySelector(".blockid[value='" + id + "']").parentNode.remove();
                    }
                    else {
                        document.querySelector(".blockid[value='" + id + "']").parentNode.remove();
                        document.querySelector(".arrowid[value='" + id + "']").parentNode.remove();
                    }
                }
            };
            flowy.beginDrag = function (event) {
                if (window.getComputedStyle(canvas_div).position == "absolute" || window.getComputedStyle(canvas_div).position == "fixed") {
                    absx = canvas_div.getBoundingClientRect().left;
                    absy = canvas_div.getBoundingClientRect().top;
                }
                if (event.targetTouches) {
                    mouse_x = event.changedTouches[0].clientX;
                    mouse_y = event.changedTouches[0].clientY;
                } else {
                    mouse_x = event.clientX;
                    mouse_y = event.clientY;
                }
                if (event.which != 3 && event.target.closest(".create-flowy")) {
                    original = event.target.closest(".create-flowy");
                    var newNode = event.target.closest(".create-flowy").cloneNode(true);
                    event.target.closest(".create-flowy").classList.add("dragnow");
                    newNode.classList.add("block");
                    newNode.classList.remove("create-flowy");
                    if (blocks.length === 0) {
                        newNode.innerHTML += "<input type='hidden' name='blockid' class='blockid' value='" + blocks.length + "'>";
                        //document.body.appendChild(newNode);
                        $('._bizgaze_popup_container').append(newNode);
                        drag = document.querySelector(".blockid[value='" + blocks.length + "']").parentNode;
                    } else {
                        newNode.innerHTML += "<input type='hidden' name='blockid' class='blockid' value='" + (Math.max.apply(Math, blocks.map(a => a.id)) + 1) + "'>";
                        //document.body.appendChild(newNode);
                        $('._bizgaze_popup_container').append(newNode);
                        drag = document.querySelector(".blockid[value='" + (parseInt(Math.max.apply(Math, blocks.map(a => a.id))) + 1) + "']").parentNode;
                    }
                    blockGrabbed(event.target.closest(".create-flowy"));
                    drag.classList.add("dragging");
                    active = true;
                    dragx = mouse_x - (event.target.closest(".create-flowy").getBoundingClientRect().left);
                    dragy = mouse_y - (event.target.closest(".create-flowy").getBoundingClientRect().top);
                    drag.style.left = mouse_x - dragx + "px";
                    drag.style.top = mouse_y - dragy + "px";
                }
            }
            flowy.endDrag = function (event) {
                if (event.which != 3 && (active || rearrange)) {
                    dragblock = false;
                    blockReleased(event);
                    if (!document.querySelector(".indicator").classList.contains("invisible")) {
                        document.querySelector(".indicator").classList.add("invisible");
                    }
                    if (active) {
                        original.classList.remove("dragnow");
                        drag.classList.remove("dragging");
                    }
                    if (parseInt(drag.querySelector(".blockid").value) === 0 && rearrange) {
                        firstBlock("rearrange")
                    } else if (active && blocks.length == 0 && (drag.getBoundingClientRect().top + window.scrollY) > (canvas_div.getBoundingClientRect().top + window.scrollY) && (drag.getBoundingClientRect().left + window.scrollX) > (canvas_div.getBoundingClientRect().left + window.scrollX)) {
                        firstBlock("drop");
                    } else if (active && blocks.length == 0) {
                        removeSelection();
                    } else if (active) {
                        var blocko = blocks.map(a => a.id);
                        for (var i = 0; i < blocks.length; i++) {
                            if (checkAttach(blocko[i])) {
                                active = false;
                                if (blockSnap(drag, false, document.querySelector(".blockid[value='" + blocko[i] + "']").parentNode)) {
                                    snap(drag, i, blocko);
                                } else {
                                    active = false;
                                    removeSelection();
                                }
                                break;
                            } else if (i == blocks.length - 1) {
                                active = false;
                                removeSelection();
                            }
                        }
                    } else if (rearrange) {
                        var blocko = blocks.map(a => a.id);
                        for (var i = 0; i < blocks.length; i++) {
                            if (checkAttach(blocko[i])) {
                                active = false;
                                drag.classList.remove("dragging");
                                snap(drag, i, blocko);
                                break;
                            } else if (i == blocks.length - 1) {
                                if (beforeDelete(drag, blocks.filter(id => id.id == blocko[i])[0])) {
                                    active = false;
                                    drag.classList.remove("dragging");
                                    snap(drag, blocko.indexOf(prevblock), blocko);
                                    break;
                                } else {
                                    rearrange = false;
                                    blockstemp = [];
                                    active = false;
                                    removeSelection();
                                    break;
                                }
                            }
                        }
                    }
                }
                eval("bizgaze_automation_flow_main.Deleteblock()");
            }
            function checkAttach(id) {
                const xpos = (drag.getBoundingClientRect().left + window.scrollX) + (parseInt(window.getComputedStyle(drag).width) / 2) + canvas_div.scrollLeft - canvas_div.getBoundingClientRect().left;
                const ypos = (drag.getBoundingClientRect().top + window.scrollY) + canvas_div.scrollTop - canvas_div.getBoundingClientRect().top;
                if (xpos >= blocks.filter(a => a.id == id)[0].x - (blocks.filter(a => a.id == id)[0].width / 2) - paddingx && xpos <= blocks.filter(a => a.id == id)[0].x + (blocks.filter(a => a.id == id)[0].width / 2) + paddingx && ypos >= blocks.filter(a => a.id == id)[0].y - (blocks.filter(a => a.id == id)[0].height / 2) && ypos <= blocks.filter(a => a.id == id)[0].y + blocks.filter(a => a.id == id)[0].height) {
                    return true;
                } else {
                    return false;
                }
            }
            function removeSelection() {
                canvas_div.appendChild(document.querySelector(".indicator"));
                drag.parentNode.removeChild(drag);
            }
            function firstBlock(type) {
                if (type == "drop") {
                    blockSnap(drag, true, undefined);
                    active = false;
                    drag.style.top = (drag.getBoundingClientRect().top + window.scrollY) - (absy + window.scrollY) + canvas_div.scrollTop + "px";
                    drag.style.left = (drag.getBoundingClientRect().left + window.scrollX) - (absx + window.scrollX) + canvas_div.scrollLeft + "px";
                    canvas_div.appendChild(drag);
                    blocks.push({
                        parent: -1,
                        childwidth: 0,
                        id: parseInt(drag.querySelector(".blockid").value),
                        x: (drag.getBoundingClientRect().left + window.scrollX) + (parseInt(window.getComputedStyle(drag).width) / 2) + canvas_div.scrollLeft - canvas_div.getBoundingClientRect().left,
                        y: (drag.getBoundingClientRect().top + window.scrollY) + (parseInt(window.getComputedStyle(drag).height) / 2) + canvas_div.scrollTop - canvas_div.getBoundingClientRect().top,
                        width: parseInt(window.getComputedStyle(drag).width),
                        height: parseInt(window.getComputedStyle(drag).height)
                    });
                } else if (type == "rearrange") {
                    drag.classList.remove("dragging");
                    rearrange = false;
                    for (var w = 0; w < blockstemp.length; w++) {
                        if (blockstemp[w].id != parseInt(drag.querySelector(".blockid").value)) {
                            const blockParent = document.querySelector(".blockid[value='" + blockstemp[w].id + "']").parentNode;
                            const arrowParent = document.querySelector(".arrowid[value='" + blockstemp[w].id + "']").parentNode;
                            blockParent.style.left = (blockParent.getBoundingClientRect().left + window.scrollX) - (window.scrollX) + canvas_div.scrollLeft - 1 - absx + "px";
                            blockParent.style.top = (blockParent.getBoundingClientRect().top + window.scrollY) - (window.scrollY) + canvas_div.scrollTop - absy - 1 + "px";
                            arrowParent.style.left = (arrowParent.getBoundingClientRect().left + window.scrollX) - (window.scrollX) + canvas_div.scrollLeft - absx - 1 + "px";
                            arrowParent.style.top = (arrowParent.getBoundingClientRect().top + window.scrollY) + canvas_div.scrollTop - 1 - absy + "px";
                            canvas_div.appendChild(blockParent);
                            canvas_div.appendChild(arrowParent);
                            blockstemp[w].x = (blockParent.getBoundingClientRect().left + window.scrollX) + (parseInt(blockParent.offsetWidth) / 2) + canvas_div.scrollLeft - canvas_div.getBoundingClientRect().left - 1;
                            blockstemp[w].y = (blockParent.getBoundingClientRect().top + window.scrollY) + (parseInt(blockParent.offsetHeight) / 2) + canvas_div.scrollTop - canvas_div.getBoundingClientRect().top - 1;
                        }
                    }
                    blockstemp.filter(a => a.id == 0)[0].x = (drag.getBoundingClientRect().left + window.scrollX) + (parseInt(window.getComputedStyle(drag).width) / 2) + canvas_div.scrollLeft - canvas_div.getBoundingClientRect().left;
                    blockstemp.filter(a => a.id == 0)[0].y = (drag.getBoundingClientRect().top + window.scrollY) + (parseInt(window.getComputedStyle(drag).height) / 2) + canvas_div.scrollTop - canvas_div.getBoundingClientRect().top;
                    blocks = blocks.concat(blockstemp);
                    blockstemp = [];
                }
            }
            function drawArrow(arrow, x, y, id) {
                if (x < 0) {
                    canvas_div.innerHTML += '<div class="arrowblock"><input type="hidden" class="arrowid" value="' + drag.querySelector(".blockid").value + '"><svg preserveaspectratio="none" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M' + (blocks.filter(a => a.id == id)[0].x - arrow.x + 5) + ' 0L' + (blocks.filter(a => a.id == id)[0].x - arrow.x + 5) + ' ' + (paddingy / 2) + 'L5 ' + (paddingy / 2) + 'L5 ' + y + '" stroke="#C5CCD0" stroke-width="2px"/><path d="M0 ' + (y - 5) + 'H10L5 ' + y + 'L0 ' + (y - 5) + 'Z" fill="#C5CCD0"/></svg></div>';
                    document.querySelector('.arrowid[value="' + drag.querySelector(".blockid").value + '"]').parentNode.style.left = (arrow.x - 5) - (absx + window.scrollX) + canvas_div.scrollLeft + canvas_div.getBoundingClientRect().left + "px";
                } else {
                    canvas_div.innerHTML += '<div class="arrowblock"><input type="hidden" class="arrowid" value="' + drag.querySelector(".blockid").value + '"><svg preserveaspectratio="none" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M20 0L20 ' + (paddingy / 2) + 'L' + (x) + ' ' + (paddingy / 2) + 'L' + x + ' ' + y + '" stroke="#C5CCD0" stroke-width="2px"/><path d="M' + (x - 5) + ' ' + (y - 5) + 'H' + (x + 5) + 'L' + x + ' ' + y + 'L' + (x - 5) + ' ' + (y - 5) + 'Z" fill="#C5CCD0"/></svg></div>';
                    document.querySelector('.arrowid[value="' + parseInt(drag.querySelector(".blockid").value) + '"]').parentNode.style.left = blocks.filter(a => a.id == id)[0].x - 20 - (absx + window.scrollX) + canvas_div.scrollLeft + canvas_div.getBoundingClientRect().left + "px";
                }
                document.querySelector('.arrowid[value="' + parseInt(drag.querySelector(".blockid").value) + '"]').parentNode.style.top = blocks.filter(a => a.id == id)[0].y + (blocks.filter(a => a.id == id)[0].height / 2) + canvas_div.getBoundingClientRect().top - absy + "px";
            }
            function updateArrow(arrow, x, y, children) {
                if (x < 0) {
                    document.querySelector('.arrowid[value="' + children.id + '"]').parentNode.style.left = (arrow.x - 5) - (absx + window.scrollX) + canvas_div.getBoundingClientRect().left + "px";
                    document.querySelector('.arrowid[value="' + children.id + '"]').parentNode.innerHTML = '<input type="hidden" class="arrowid" value="' + children.id + '"><svg preserveaspectratio="none" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M' + (blocks.filter(id => id.id == children.parent)[0].x - arrow.x + 5) + ' 0L' + (blocks.filter(id => id.id == children.parent)[0].x - arrow.x + 5) + ' ' + (paddingy / 2) + 'L5 ' + (paddingy / 2) + 'L5 ' + y + '" stroke="#C5CCD0" stroke-width="2px"/><path d="M0 ' + (y - 5) + 'H10L5 ' + y + 'L0 ' + (y - 5) + 'Z" fill="#C5CCD0"/></svg>';
                } else {
                    document.querySelector('.arrowid[value="' + children.id + '"]').parentNode.style.left = blocks.filter(id => id.id == children.parent)[0].x - 20 - (absx + window.scrollX) + canvas_div.getBoundingClientRect().left + "px";
                    document.querySelector('.arrowid[value="' + children.id + '"]').parentNode.innerHTML = '<input type="hidden" class="arrowid" value="' + children.id + '"><svg preserveaspectratio="none" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M20 0L20 ' + (paddingy / 2) + 'L' + (x) + ' ' + (paddingy / 2) + 'L' + x + ' ' + y + '" stroke="#C5CCD0" stroke-width="2px"/><path d="M' + (x - 5) + ' ' + (y - 5) + 'H' + (x + 5) + 'L' + x + ' ' + y + 'L' + (x - 5) + ' ' + (y - 5) + 'Z" fill="#C5CCD0"/></svg>';
                }
            }
            function snap(drag, i, blocko) {
                if (!rearrange) {
                    canvas_div.appendChild(drag);
                }
                var totalwidth = 0;
                var totalremove = 0;
                var maxheight = 0;
                for (var w = 0; w < blocks.filter(id => id.parent == blocko[i]).length; w++) {
                    var children = blocks.filter(id => id.parent == blocko[i])[w];
                    if (children.childwidth > children.width) {
                        totalwidth += children.childwidth + paddingx;
                    } else {
                        totalwidth += children.width + paddingx;
                    }
                }
                totalwidth += parseInt(window.getComputedStyle(drag).width);
                for (var w = 0; w < blocks.filter(id => id.parent == blocko[i]).length; w++) {
                    var children = blocks.filter(id => id.parent == blocko[i])[w];
                    if (children.childwidth > children.width) {
                        document.querySelector(".blockid[value='" + children.id + "']").parentNode.style.left = blocks.filter(a => a.id == blocko[i])[0].x - (totalwidth / 2) + totalremove + (children.childwidth / 2) - (children.width / 2) + "px";
                        children.x = blocks.filter(id => id.parent == blocko[i])[0].x - (totalwidth / 2) + totalremove + (children.childwidth / 2);
                        totalremove += children.childwidth + paddingx;
                    } else {
                        document.querySelector(".blockid[value='" + children.id + "']").parentNode.style.left = blocks.filter(a => a.id == blocko[i])[0].x - (totalwidth / 2) + totalremove + "px";
                        children.x = blocks.filter(id => id.parent == blocko[i])[0].x - (totalwidth / 2) + totalremove + (children.width / 2);
                        totalremove += children.width + paddingx;
                    }
                }
                drag.style.left = blocks.filter(id => id.id == blocko[i])[0].x - (totalwidth / 2) + totalremove - (window.scrollX + absx) + canvas_div.scrollLeft + canvas_div.getBoundingClientRect().left + "px";
                drag.style.top = blocks.filter(id => id.id == blocko[i])[0].y + (blocks.filter(id => id.id == blocko[i])[0].height / 2) + paddingy - (window.scrollY + absy) + canvas_div.getBoundingClientRect().top + "px";
                if (rearrange) {
                    blockstemp.filter(a => a.id == parseInt(drag.querySelector(".blockid").value))[0].x = (drag.getBoundingClientRect().left + window.scrollX) + (parseInt(window.getComputedStyle(drag).width) / 2) + canvas_div.scrollLeft - canvas_div.getBoundingClientRect().left;
                    blockstemp.filter(a => a.id == parseInt(drag.querySelector(".blockid").value))[0].y = (drag.getBoundingClientRect().top + window.scrollY + absy) + (parseInt(window.getComputedStyle(drag).height) / 2) + canvas_div.scrollTop - canvas_div.getBoundingClientRect().top;
                    blockstemp.filter(a => a.id == drag.querySelector(".blockid").value)[0].parent = blocko[i];
                    for (var w = 0; w < blockstemp.length; w++) {
                        if (blockstemp[w].id != parseInt(drag.querySelector(".blockid").value)) {
                            const blockParent = document.querySelector(".blockid[value='" + blockstemp[w].id + "']").parentNode;
                            const arrowParent = document.querySelector(".arrowid[value='" + blockstemp[w].id + "']").parentNode;
                            blockParent.style.left = (blockParent.getBoundingClientRect().left + window.scrollX) - (window.scrollX + canvas_div.getBoundingClientRect().left) + canvas_div.scrollLeft + "px";
                            blockParent.style.top = (blockParent.getBoundingClientRect().top + window.scrollY) - (window.scrollY + canvas_div.getBoundingClientRect().top) + canvas_div.scrollTop + "px";
                            arrowParent.style.left = (arrowParent.getBoundingClientRect().left + window.scrollX) - (window.scrollX + canvas_div.getBoundingClientRect().left) + canvas_div.scrollLeft + 20 + "px";
                            arrowParent.style.top = (arrowParent.getBoundingClientRect().top + window.scrollY) - (window.scrollY + canvas_div.getBoundingClientRect().top) + canvas_div.scrollTop + "px";
                            canvas_div.appendChild(blockParent);
                            canvas_div.appendChild(arrowParent);

                            blockstemp[w].x = (blockParent.getBoundingClientRect().left + window.scrollX) + (parseInt(window.getComputedStyle(blockParent).width) / 2) + canvas_div.scrollLeft - canvas_div.getBoundingClientRect().left;
                            blockstemp[w].y = (blockParent.getBoundingClientRect().top + window.scrollY) + (parseInt(window.getComputedStyle(blockParent).height) / 2) + canvas_div.scrollTop - canvas_div.getBoundingClientRect().top;
                        }
                    }
                    blocks = blocks.concat(blockstemp);
                    blockstemp = [];
                } else {
                    blocks.push({
                        childwidth: 0,
                        parent: blocko[i],
                        id: parseInt(drag.querySelector(".blockid").value),
                        x: (drag.getBoundingClientRect().left + window.scrollX) + (parseInt(window.getComputedStyle(drag).width) / 2) + canvas_div.scrollLeft - canvas_div.getBoundingClientRect().left,
                        y: (drag.getBoundingClientRect().top + window.scrollY) + (parseInt(window.getComputedStyle(drag).height) / 2) + canvas_div.scrollTop - canvas_div.getBoundingClientRect().top,
                        width: parseInt(window.getComputedStyle(drag).width),
                        height: parseInt(window.getComputedStyle(drag).height)
                    });
                }
                var arrowblock = blocks.filter(a => a.id == parseInt(drag.querySelector(".blockid").value))[0];
                var arrowx = arrowblock.x - blocks.filter(a => a.id == blocko[i])[0].x + 20;
                var arrowy = paddingy;
                drawArrow(arrowblock, arrowx, arrowy, blocko[i]);
                if (blocks.filter(a => a.id == blocko[i])[0].parent != -1) {
                    var flag = false;
                    var idval = blocko[i];
                    while (!flag) {
                        if (blocks.filter(a => a.id == idval)[0].parent == -1) {
                            flag = true;
                        } else {
                            var zwidth = 0;
                            for (var w = 0; w < blocks.filter(id => id.parent == idval).length; w++) {
                                var children = blocks.filter(id => id.parent == idval)[w];
                                if (children.childwidth > children.width) {
                                    if (w == blocks.filter(id => id.parent == idval).length - 1) {
                                        zwidth += children.childwidth;
                                    } else {
                                        zwidth += children.childwidth + paddingx;
                                    }
                                } else {
                                    if (w == blocks.filter(id => id.parent == idval).length - 1) {
                                        zwidth += children.width;
                                    } else {
                                        zwidth += children.width + paddingx;
                                    }
                                }
                            }
                            blocks.filter(a => a.id == idval)[0].childwidth = zwidth;
                            idval = blocks.filter(a => a.id == idval)[0].parent;
                        }
                    }
                    blocks.filter(id => id.id == idval)[0].childwidth = totalwidth;
                }
                if (rearrange) {
                    rearrange = false;
                    drag.classList.remove("dragging");
                }
                rearrangeMe();
                checkOffset();
            }
            function touchblock(event) {
                dragblock = false;
                if (hasParentClass(event.target, "block")) {
                    var theblock = event.target.closest(".block");
                    if (event.targetTouches) {
                        mouse_x = event.targetTouches[0].clientX;
                        mouse_y = event.targetTouches[0].clientY;
                    } else {
                        mouse_x = event.clientX;
                        mouse_y = event.clientY;
                    }
                    if (event.type !== "mouseup" && hasParentClass(event.target, "block")) {
                        if (event.which != 3) {
                            if (!active && !rearrange) {
                                dragblock = true;
                                drag = theblock;
                                dragx = mouse_x - (drag.getBoundingClientRect().left + window.scrollX);
                                dragy = mouse_y - (drag.getBoundingClientRect().top + window.scrollY);
                            }
                        }
                    }
                }
            }
            function hasParentClass(element, classname) {
                if (element.className) {
                    if (element.className.split(' ').indexOf(classname) >= 0) return true;
                }
                return element.parentNode && hasParentClass(element.parentNode, classname);
            }
            flowy.moveBlock = function (event) {
                if (event.targetTouches) {
                    mouse_x = event.targetTouches[0].clientX;
                    mouse_y = event.targetTouches[0].clientY;
                } else {
                    mouse_x = event.clientX;
                    mouse_y = event.clientY;
                }
                if (dragblock) {
                    rearrange = true;
                    drag.classList.add("dragging");
                    var blockid = parseInt(drag.querySelector(".blockid").value);
                    prevblock = blocks.filter(a => a.id == blockid)[0].parent;
                    blockstemp.push(blocks.filter(a => a.id == blockid)[0]);
                    blocks = blocks.filter(function (e) {
                        return e.id != blockid
                    });
                    if (blockid != 0) {
                        document.querySelector(".arrowid[value='" + blockid + "']").parentNode.remove();
                    }
                    var layer = blocks.filter(a => a.parent == blockid);
                    var flag = false;
                    var foundids = [];
                    var allids = [];
                    while (!flag) {
                        for (var i = 0; i < layer.length; i++) {
                            if (layer[i] != blockid) {
                                blockstemp.push(blocks.filter(a => a.id == layer[i].id)[0]);
                                const blockParent = document.querySelector(".blockid[value='" + layer[i].id + "']").parentNode;
                                const arrowParent = document.querySelector(".arrowid[value='" + layer[i].id + "']").parentNode;
                                blockParent.style.left = (blockParent.getBoundingClientRect().left + window.scrollX) - (drag.getBoundingClientRect().left + window.scrollX) + "px";
                                blockParent.style.top = (blockParent.getBoundingClientRect().top + window.scrollY) - (drag.getBoundingClientRect().top + window.scrollY) + "px";
                                arrowParent.style.left = (arrowParent.getBoundingClientRect().left + window.scrollX) - (drag.getBoundingClientRect().left + window.scrollX) + "px";
                                arrowParent.style.top = (arrowParent.getBoundingClientRect().top + window.scrollY) - (drag.getBoundingClientRect().top + window.scrollY) + "px";
                                drag.appendChild(blockParent);
                                drag.appendChild(arrowParent);
                                foundids.push(layer[i].id);
                                allids.push(layer[i].id);
                            }
                        }
                        if (foundids.length == 0) {
                            flag = true;
                        } else {
                            layer = blocks.filter(a => foundids.includes(a.parent));
                            foundids = [];
                        }
                    }
                    for (var i = 0; i < blocks.filter(a => a.parent == blockid).length; i++) {
                        var blocknumber = blocks.filter(a => a.parent == blockid)[i];
                        blocks = blocks.filter(function (e) {
                            return e.id != blocknumber
                        });
                    }
                    for (var i = 0; i < allids.length; i++) {
                        var blocknumber = allids[i];
                        blocks = blocks.filter(function (e) {
                            return e.id != blocknumber
                        });
                    }
                    if (blocks.length > 1) {
                        rearrangeMe();
                    }
                    dragblock = false;
                }
                if (active) {
                    drag.style.left = mouse_x - dragx + "px";
                    drag.style.top = mouse_y - dragy + "px";
                } else if (rearrange) {
                    drag.style.left = mouse_x - dragx - (window.scrollX + absx) + canvas_div.scrollLeft + "px";
                    drag.style.top = mouse_y - dragy - (window.scrollY + absy) + canvas_div.scrollTop + "px";
                    blockstemp.filter(a => a.id == parseInt(drag.querySelector(".blockid").value)).x = (drag.getBoundingClientRect().left + window.scrollX) + (parseInt(window.getComputedStyle(drag).width) / 2) + canvas_div.scrollLeft;
                    blockstemp.filter(a => a.id == parseInt(drag.querySelector(".blockid").value)).y = (drag.getBoundingClientRect().top + window.scrollY) + (parseInt(window.getComputedStyle(drag).height) / 2) + canvas_div.scrollTop;
                }
                if (active || rearrange) {
                    if (mouse_x > canvas_div.getBoundingClientRect().width + canvas_div.getBoundingClientRect().left - 10 && mouse_x < canvas_div.getBoundingClientRect().width + canvas_div.getBoundingClientRect().left + 10) {
                        canvas_div.scrollLeft += 10;
                    } else if (mouse_x < canvas_div.getBoundingClientRect().left + 10 && mouse_x > canvas_div.getBoundingClientRect().left - 10) {
                        canvas_div.scrollLeft -= 10;
                    } else if (mouse_y > canvas_div.getBoundingClientRect().height + canvas_div.getBoundingClientRect().top - 10 && mouse_y < canvas_div.getBoundingClientRect().height + canvas_div.getBoundingClientRect().top + 10) {
                        canvas_div.scrollTop += 10;
                    } else if (mouse_y < canvas_div.getBoundingClientRect().top + 10 && mouse_y > canvas_div.getBoundingClientRect().top - 10) {
                        canvas_div.scrollLeft -= 10;
                    }
                    var xpos = (drag.getBoundingClientRect().left + window.scrollX) + (parseInt(window.getComputedStyle(drag).width) / 2) + canvas_div.scrollLeft - canvas_div.getBoundingClientRect().left;
                    var ypos = (drag.getBoundingClientRect().top + window.scrollY) + canvas_div.scrollTop - canvas_div.getBoundingClientRect().top;
                    var blocko = blocks.map(a => a.id);
                    for (var i = 0; i < blocks.length; i++) {
                        if (checkAttach(blocko[i])) {
                            document.querySelector(".blockid[value='" + blocko[i] + "']").parentNode.appendChild(document.querySelector(".indicator"));
                            document.querySelector(".indicator").style.left = (document.querySelector(".blockid[value='" + blocko[i] + "']").parentNode.offsetWidth / 2) - 5 + "px";
                            document.querySelector(".indicator").style.top = document.querySelector(".blockid[value='" + blocko[i] + "']").parentNode.offsetHeight + "px";
                            document.querySelector(".indicator").classList.remove("invisible");
                            break;
                        } else if (i == blocks.length - 1) {
                            if (!document.querySelector(".indicator").classList.contains("invisible")) {
                                document.querySelector(".indicator").classList.add("invisible");
                            }
                        }
                    }
                }
            }
            function checkOffset() {
                offsetleft = blocks.map(a => a.x);
                var widths = blocks.map(a => a.width);
                var mathmin = offsetleft.map(function (item, index) {
                    return item - (widths[index] / 2);
                })
                offsetleft = Math.min.apply(Math, mathmin);
                if (offsetleft < (canvas_div.getBoundingClientRect().left + window.scrollX - absx)) {
                    var blocko = blocks.map(a => a.id);
                    for (var w = 0; w < blocks.length; w++) {
                        document.querySelector(".blockid[value='" + blocks.filter(a => a.id == blocko[w])[0].id + "']").parentNode.style.left = blocks.filter(a => a.id == blocko[w])[0].x - (blocks.filter(a => a.id == blocko[w])[0].width / 2) - offsetleft + canvas_div.getBoundingClientRect().left - absx + 20 + "px";
                        if (blocks.filter(a => a.id == blocko[w])[0].parent != -1) {
                            var arrowblock = blocks.filter(a => a.id == blocko[w])[0];
                            var arrowx = arrowblock.x - blocks.filter(a => a.id == blocks.filter(a => a.id == blocko[w])[0].parent)[0].x;
                            if (arrowx < 0) {
                                document.querySelector('.arrowid[value="' + blocko[w] + '"]').parentNode.style.left = (arrowblock.x - offsetleft + 20 - 5) + canvas_div.getBoundingClientRect().left - absx + "px";
                            } else {
                                document.querySelector('.arrowid[value="' + blocko[w] + '"]').parentNode.style.left = blocks.filter(id => id.id == blocks.filter(a => a.id == blocko[w])[0].parent)[0].x - 20 - offsetleft + canvas_div.getBoundingClientRect().left - absx + 20 + "px";
                            }
                        }
                    }
                    for (var w = 0; w < blocks.length; w++) {
                        blocks[w].x = (document.querySelector(".blockid[value='" + blocks[w].id + "']").parentNode.getBoundingClientRect().left + window.scrollX) + (canvas_div.scrollLeft) + (parseInt(window.getComputedStyle(document.querySelector(".blockid[value='" + blocks[w].id + "']").parentNode).width) / 2) - 20 - canvas_div.getBoundingClientRect().left;
                    }
                }
            }
            function rearrangeMe() {
                var result = blocks.map(a => a.parent);
                for (var z = 0; z < result.length; z++) {
                    if (result[z] == -1) {
                        z++;
                    }
                    var totalwidth = 0;
                    var totalremove = 0;
                    var maxheight = 0;
                    for (var w = 0; w < blocks.filter(id => id.parent == result[z]).length; w++) {
                        var children = blocks.filter(id => id.parent == result[z])[w];
                        if (blocks.filter(id => id.parent == children.id).length == 0) {
                            children.childwidth = 0;
                        }
                        if (children.childwidth > children.width) {
                            if (w == blocks.filter(id => id.parent == result[z]).length - 1) {
                                totalwidth += children.childwidth;
                            } else {
                                totalwidth += children.childwidth + paddingx;
                            }
                        } else {
                            if (w == blocks.filter(id => id.parent == result[z]).length - 1) {
                                totalwidth += children.width;
                            } else {
                                totalwidth += children.width + paddingx;
                            }
                        }
                    }
                    if (result[z] != -1) {
                        blocks.filter(a => a.id == result[z])[0].childwidth = totalwidth;
                    }
                    for (var w = 0; w < blocks.filter(id => id.parent == result[z]).length; w++) {
                        var children = blocks.filter(id => id.parent == result[z])[w];
                        const r_block = document.querySelector(".blockid[value='" + children.id + "']").parentNode;
                        const r_array = blocks.filter(id => id.id == result[z]);
                        r_block.style.top = r_array.y + paddingy + canvas_div.getBoundingClientRect().top - absy + "px";
                        r_array.y = r_array.y + paddingy;
                        if (children.childwidth > children.width) {
                            r_block.style.left = r_array[0].x - (totalwidth / 2) + totalremove + (children.childwidth / 2) - (children.width / 2) - (absx + window.scrollX) + canvas_div.getBoundingClientRect().left + "px";
                            children.x = r_array[0].x - (totalwidth / 2) + totalremove + (children.childwidth / 2);
                            totalremove += children.childwidth + paddingx;
                        } else {
                            r_block.style.left = r_array[0].x - (totalwidth / 2) + totalremove - (absx + window.scrollX) + canvas_div.getBoundingClientRect().left + "px";
                            children.x = r_array[0].x - (totalwidth / 2) + totalremove + (children.width / 2);
                            totalremove += children.width + paddingx;
                        }
                        var arrowblock = blocks.filter(a => a.id == children.id)[0];
                        var arrowx = arrowblock.x - blocks.filter(a => a.id == children.parent)[0].x + 20;
                        var arrowy = paddingy;
                        updateArrow(arrowblock, arrowx, arrowy, children);
                    }
                }
            }
            document.addEventListener("mousedown", flowy.beginDrag);
            document.addEventListener("mousedown", touchblock, false);
            document.addEventListener("touchstart", flowy.beginDrag);
            document.addEventListener("touchstart", touchblock, false);
            document.addEventListener("mouseup", touchblock, false);
            document.addEventListener("mousemove", flowy.moveBlock, false);
            document.addEventListener("touchmove", flowy.moveBlock, false);
            document.addEventListener("mouseup", flowy.endDrag, false);
            document.addEventListener("touchend", flowy.endDrag, false);
            flowy.remove = function () {
               document.removeEventListener("touchstart", touchblock, false);
               document.removeEventListener("mouseup", touchblock, false);
               document.removeEventListener("mousedown", touchblock, false);
            }
        }
        function blockGrabbed(block) {
            grab(block);
        }
        function blockReleased(event) {
            release(event);
        }
        function blockSnap(drag, first, parent) {
            return snapping(drag, first, parent);
        }
        function beforeDelete(drag, parent) {
           return rearrange(drag, parent);
        }
        function addEventListenerMulti(type, listener, capture, selector) {
            var nodes = document.querySelectorAll(selector);
            for (var i = 0; i < nodes.length; i++) {
                nodes[i].addEventListener(type, listener, capture);
            }
        }
        function removeEventListenerMulti(type, listener, capture, selector) {
            var nodes = document.querySelectorAll(selector);
            for (var i = 0; i < nodes.length; i++) {
                nodes[i].removeEventListener(type, listener, capture);
            }
        }
        flowy.load();
        flowy.destroy = function () {
            document.removeEventListener("mousedown", flowy.beginDrag);
            document.removeEventListener("touchstart", flowy.beginDrag);
            document.removeEventListener("mousemove", flowy.moveBlock, false);
            document.removeEventListener("touchmove", flowy.moveBlock, false);
            document.removeEventListener("mouseup", flowy.endDrag, false);
            document.removeEventListener("touchend", flowy.endDrag, false);
            eval("flowy.remove()");
        }
    }
    catch (error) {
        flowy.destroy();
    }
}