/**
 * jKanban
 * Vanilla Javascript plugin for manage kanban boards
 *
 * @site: http://www.riccardotartaglia.it/jkanban/
 * @author: Riccardo Tartaglia
 */

//Require dragula
var dragula = require("dragula");

(function () {
    
    this.jKanban = function () {
        
        var self = this;
        var __DEFAULT_ITEM_HANDLE_OPTIONS = {
            enabled: false
        }
        this._disallowedItemProperties = [
            "id",
            "title",
            "click",
            "drag",
            "dragend",
            "drop",
            "order"
        ];
        this.element = "";
        this.container = "";
        this.boardContainer = [];
        this.handlers = [];
        this.dragula = dragula;
        this.drake = "";
        this.drakeBoard = "";
        this.addItemButton = false;
        this.buttonContent = "+";
        this.itemHandleOptions = __DEFAULT_ITEM_HANDLE_OPTIONS;
        var defaults = {
            element: "",
            gutter: "15px",
            widthBoard: "250px",
            responsive: "700",
            responsivePercentage: false,
            boards: [],
            dragBoards: true,
            dragItems: true, //whether can drag cards or not, useful when set permissions on it.
            addItemButton: false,
            buttonContent: "+",
            itemHandleOptions: __DEFAULT_ITEM_HANDLE_OPTIONS,
            dragEl: function (el, source) { },
            dragendEl: function (el) { },
            dropEl: function (el, target, source, sibling) { },
            dragBoard: function (el, source) { },
            dragendBoard: function (el) { },
            dropBoard: function (el, target, source, sibling) { },
            click: function (el) { },
            buttonClick: function (el, boardId) { }
        };

        if (arguments[0] && typeof arguments[0] === "object") {
            this.options = __extendDefaults(defaults, arguments[0]);
        }

        this.__getCanMove = function (handle) {
            if (!self.options.itemHandleOptions.enabled) {
                return !!self.options.dragItems;
            }

            if (self.options.itemHandleOptions.handleClass) {
                return handle.classList.contains(self.options.itemHandleOptions.handleClass);
            }

            return handle.classList.contains("item_handle")
        }

        this.init = function () {
            //set initial boards
            __setBoard();
            //set drag with dragula
            if (window.innerWidth > self.options.responsive) {
                //Init Drag Board
                self.drakeBoard = self
                    .dragula([self.container], {
                        moves: function (el, source, handle, sibling) {
                            if (!self.options.dragBoards) return false;
                            return (
                                handle.classList.contains("kanban-board-header") ||
                                handle.classList.contains("kanban-title-board")
                            );
                        },
                        accepts: function (el, target, source, sibling) {
                            return target.classList.contains("kanban-container");
                        },
                        revertOnSpill: true,
                        direction: "horizontal"
                    })
                    .on("drag", function (el, source) {
                        el.classList.add("is-moving");
                        self.options.dragBoard(el, source);
                        if (typeof el.dragfn === "function") el.dragfn(el, source);
                    })
                    .on("dragend", function (el) {
                        __updateBoardsOrder();
                        el.classList.remove("is-moving");
                        self.options.dragendBoard(el);
                        if (typeof el.dragendfn === "function") el.dragendfn(el);
                    })
                    .on("drop", function (el, target, source, sibling) {
                        el.classList.remove("is-moving");
                        self.options.dropBoard(el, target, source, sibling);
                        if (typeof el.dropfn === "function")
                            el.dropfn(el, target, source, sibling);
                    });

                //Init Drag Item
                self.drake = self
                    .dragula(self.boardContainer, {
                        moves: function (el, source, handle, sibling) {
                            return self.__getCanMove(handle);
                        },
                        revertOnSpill: true
                    })
                    .on("cancel", function (el, container, source) {
                        self.enableAllBoards();
                    })
                    .on("drag", function (el, source) {
                        var elClass = el.getAttribute("class");
                        if (elClass !== "" && elClass.indexOf("not-draggable") > -1) {
                            self.drake.cancel(true);
                            return;
                        }

                        el.classList.add("is-moving");
                        var boardJSON = __findBoardJSON(source.parentNode.dataset.id);
                        if (boardJSON.dragTo !== undefined) {
                            self.options.boards.map(function (board) {
                                if (
                                    boardJSON.dragTo.indexOf(board.id) === -1 &&
                                    board.id !== source.parentNode.dataset.id
                                ) {
                                    self.findBoard(board.id).classList.add("disabled-board");
                                }
                            });
                        }

                        self.options.dragEl(el, source);
                        if (el !== null && typeof el.dragfn === "function")
                            el.dragfn(el, source);
                    })
                    .on("dragend", function (el) {
                        self.options.dragendEl(el);
                        if (el !== null && typeof el.dragendfn === "function")
                            el.dragendfn(el);
                    })
                    .on("drop", function (el, target, source, sibling) {
                        self.enableAllBoards();

                        var boardJSON = __findBoardJSON(source.parentNode.dataset.id);
                        if (boardJSON.dragTo !== undefined) {
                            if (
                                boardJSON.dragTo.indexOf(target.parentNode.dataset.id) === -1 &&
                                target.parentNode.dataset.id !== source.parentNode.dataset.id
                            ) {
                                self.drake.cancel(true);
                            }
                        }
                        if (el !== null) {
                            var result = self.options.dropEl(el, target, source, sibling);
                            if (result === false) {
                                self.drake.cancel(true);
                            }
                            el.classList.remove("is-moving");
                            if (typeof el.dropfn === "function")
                                el.dropfn(el, target, source, sibling);
                        }
                    });
            }
        };

        this.enableAllBoards = function () {
            var allB = document.querySelectorAll(".kanban-board");
            if (allB.length > 0 && allB !== undefined) {
                for (var i = 0; i < allB.length; i++) {
                    allB[i].classList.remove("disabled-board");
                }
            }
        };

        this.addElement = function (boardID, element) {
            var board = self.element.querySelector(
                '[data-id="' + boardID + '"] .kanban-drag'
            );
            var nodeItem = document.createElement("div");
            nodeItem.classList.add("kanban-item");
            if (typeof element.id !== "undefined" && element.id !== "") {
                nodeItem.setAttribute("data-eid", element.id);
            }
            if (element.class && Array.isArray(element.class)) {
                element.class.forEach(function (cl) {
                    nodeItem.classList.add(cl);
                })
            }
            nodeItem.innerHTML = __buildItemTitle(element.title);
            //add function
            nodeItem.clickfn = element.click;
            nodeItem.dragfn = element.drag;
            nodeItem.dragendfn = element.dragend;
            nodeItem.dropfn = element.drop;
            __appendCustomProperties(nodeItem, element);
            __onclickHandler(nodeItem);
            if (self.options.itemHandleOptions.enabled) {
                nodeItem.style.cursor = "default";
            }
            board.appendChild(nodeItem);
            return self;
        };

        this.addForm = function (boardID, formItem) {
            var board = self.element.querySelector(
                '[data-id="' + boardID + '"] .kanban-drag'
            );
            var _attribute = formItem.getAttribute("class");
            formItem.setAttribute("class", _attribute + " not-draggable");
            board.appendChild(formItem);
            return self;
        };

        this.addBoards = function (boards, isInit) {
            if (self.options.responsivePercentage) {
                self.container.style.width = "100%";
                self.options.gutter = "1%";
                if (window.innerWidth > self.options.responsive) {
                    var boardWidth = (100 - boards.length * 2) / boards.length;
                } else {
                    var boardWidth = 100 - boards.length * 2;
                }
            } else {
                var boardWidth = self.options.widthBoard;
            }
            var addButton = self.options.addItemButton;
            var buttonContent = self.options.buttonContent;

            //for on all the boards
            for (var boardkey in boards) {
                // single board
                var board = boards[boardkey];
                if (!isInit) {
                    self.options.boards.push(board);
                }

                if (!self.options.responsivePercentage) {
                    //add width to container
                    if (self.container.style.width === "") {
                        self.container.style.width =
                            parseInt(boardWidth) + parseInt(self.options.gutter) * 2 + "px";
                    } else {
                        self.container.style.width =
                            parseInt(self.container.style.width) +
                            parseInt(boardWidth) +
                            parseInt(self.options.gutter) * 2 +
                            "px";
                    }
                }
                //create node
                var boardNode = document.createElement("div");
                boardNode.dataset.id = board.id;
                boardNode.dataset.order = self.container.childNodes.length + 1;
                boardNode.classList.add("kanban-board");
                //set style
                if (self.options.responsivePercentage) {
                    boardNode.style.width = boardWidth + "%";
                } else {
                    boardNode.style.width = boardWidth;
                }
                boardNode.style.marginLeft = self.options.gutter;
                boardNode.style.marginRight = self.options.gutter;
                // header board
                var headerBoard = document.createElement("header");
                if (board.class !== "" && board.class !== undefined)
                    var allClasses = board.class.split(",");
                else allClasses = [];
                headerBoard.classList.add("kanban-board-header");
                allClasses.map(function (value) {
                    headerBoard.classList.add(value);
                });
                headerBoard.innerHTML =
                    '<div class="kanban-title-board">' + board.title + "</div>";
                // if add button is true, add button to the board
                if (addButton) {
                    var btn = document.createElement("BUTTON");
                    var t = document.createTextNode(buttonContent);
                    btn.setAttribute(
                        "class",
                        "kanban-title-button btn btn-default btn-xs"
                    );
                    btn.appendChild(t);
                    //var buttonHtml = '<button class="kanban-title-button btn btn-default btn-xs">'+buttonContent+'</button>'
                    headerBoard.appendChild(btn);
                    __onButtonClickHandler(btn, board.id);
                }
                //content board
                var contentBoard = document.createElement("main");
                contentBoard.classList.add("kanban-drag");
                if (board.bodyClass !== "" && board.bodyClass !== undefined)
                    var bodyClasses = board.bodyClass.split(",");
                else bodyClasses = [];
                bodyClasses.map(function (value) {
                    contentBoard.classList.add(value);
                });
                //add drag to array for dragula
                self.boardContainer.push(contentBoard);
                for (var itemkey in board.item) {
                    //create item
                    var itemKanban = board.item[itemkey];
                    var nodeItem = document.createElement("div");
                    nodeItem.classList.add("kanban-item");
                    if (itemKanban.id) {
                        nodeItem.dataset.eid = itemKanban.id;
                    }
                    if (itemKanban.class && Array.isArray(itemKanban.class)) {
                        itemKanban.class.forEach(function (cl) {
                            nodeItem.classList.add(cl);
                        })
                    }
                    nodeItem.innerHTML = __buildItemTitle(itemKanban.title);
                    //add function
                    nodeItem.clickfn = itemKanban.click;
                    nodeItem.dragfn = itemKanban.drag;
                    nodeItem.dragendfn = itemKanban.dragend;
                    nodeItem.dropfn = itemKanban.drop;
                    __appendCustomProperties(nodeItem, itemKanban);
                    //add click handler of item
                    __onclickHandler(nodeItem);
                    if (self.options.itemHandleOptions.enabled) {
                        nodeItem.style.cursor = "default";
                    }
                    contentBoard.appendChild(nodeItem);
                }
                //footer board
                var footerBoard = document.createElement("footer");
                //board assembly
                boardNode.appendChild(headerBoard);
                boardNode.appendChild(contentBoard);
                boardNode.appendChild(footerBoard);
                //board add
                self.container.appendChild(boardNode);
            }
            return self;
        };

        this.findBoard = function (id) {
            var el = self.element.querySelector('[data-id="' + id + '"]');
            return el;
        };

        this.getParentBoardID = function (el) {
            if (typeof el === "string") {
                el = self.element.querySelector('[data-eid="' + el + '"]');
            }
            if (el === null) {
                return null;
            }
            return el.parentNode.parentNode.dataset.id;
        };

        this.moveElement = function (targetBoardID, elementID, element) {
            if (targetBoardID === this.getParentBoardID(elementID)) {
                return;
            }

            this.removeElement(elementID);
            return this.addElement(targetBoardID, element);
        };

        this.replaceElement = function (el, element) {
            var nodeItem = el;
            if (typeof nodeItem === "string") {
                nodeItem = self.element.querySelector('[data-eid="' + el + '"]');
            }
            nodeItem.innerHTML = element.title;
            // add function
            nodeItem.clickfn = element.click;
            nodeItem.dragfn = element.drag;
            nodeItem.dragendfn = element.dragend;
            nodeItem.dropfn = element.drop;
            __appendCustomProperties(nodeItem, element);
            return self;
        };

        this.findElement = function (id) {
            var el = self.element.querySelector('[data-eid="' + id + '"]');
            return el;
        };

        this.getBoardElements = function (id) {
            var board = self.element.querySelector(
                '[data-id="' + id + '"] .kanban-drag'
            );
            return board.childNodes;
        };

        this.removeElement = function (el) {
            if (typeof el === "string")
                el = self.element.querySelector('[data-eid="' + el + '"]');
            if (el !== null) {
                el.remove();
            }
            return self;
        };

        this.removeBoard = function (board) {
            var boardElement = null;
            if (typeof board === "string")
                boardElement = self.element.querySelector('[data-id="' + board + '"]');
            if (boardElement !== null) {
                boardElement.remove();
            }

            // remove thboard in options.boards
            for (var i = 0; i < self.options.boards.length; i++) {
                if (self.options.boards[i].id === board) {
                    self.options.boards.splice(i, 1);
                    break;
                }
            }

            return self;
        };

        // board button on click function
        this.onButtonClick = function (el) { };
        //PRIVATE FUNCTION
        function __extendDefaults(source, properties) {
            var property;
            for (property in properties) {
                if (properties.hasOwnProperty(property)) {
                    source[property] = properties[property];
                }
            }
            return source;
        }

        function __setBoard() {
            self.element = document.querySelector(self.options.element);
            //create container
            var boardContainer = document.createElement("div");
            boardContainer.classList.add("kanban-container");
            self.container = boardContainer;
            //add boards
            self.addBoards(self.options.boards, true);
            //appends to container
            self.element.appendChild(self.container);
        }

        function __onclickHandler(nodeItem, clickfn) {
            nodeItem.addEventListener("click", function (e) {
                e.preventDefault();
                self.options.click(this);
                if (typeof this.clickfn === "function") this.clickfn(this);
            });
        }

        function __onButtonClickHandler(nodeItem, boardId) {
            nodeItem.addEventListener("click", function (e) {
                e.preventDefault();
                self.options.buttonClick(this, boardId);
                // if(typeof(this.clickfn) === 'function')
                //     this.clickfn(this);
            });
        }

        function __findBoardJSON(id) {
            var el = [];
            self.options.boards.map(function (board) {
                if (board.id === id) {
                    return el.push(board);
                }
            });
            return el[0];
        }

        function __appendCustomProperties(element, parentObject) {
            for (var propertyName in parentObject) {
                if (self._disallowedItemProperties.indexOf(propertyName) > -1) {
                    continue;
                }

                element.setAttribute(
                    "data-" + propertyName,
                    parentObject[propertyName]
                );
            }
        }

        function __updateBoardsOrder() {
            var index = 1;
            for (var i = 0; i < self.container.childNodes.length; i++) {
                self.container.childNodes[i].dataset.order = index++;
            }
        }

        function __buildItemTitle(title) {
            var result = title;
            if (self.options.itemHandleOptions.enabled) {
                if ((self.options.itemHandleOptions.customHandler || undefined) === undefined) {
                    var customCssHandler = self.options.itemHandleOptions.customCssHandler;
                    var customCssIconHandler = self.options.itemHandleOptions.customCssIconHandler;
                    if ((customCssHandler || undefined) === undefined) {
                        customCssHandler = "drag_handler";
                    }
                    if ((customCssIconHandler || undefined) === undefined) {
                        customCssIconHandler = customCssHandler + "_icon";
                    }

                    result = "<div class='item_handle " + customCssHandler + "'><i class='item_handle " + customCssIconHandler + "'></i></div><div>" + result + "</div>";
                } else {
                    result = self.options.itemHandleOptions.customHandler.replace("%s", result);
                }
            }
            return result;
        }

        //init plugin
        this.init();
    };
})();