"use strict";

(function() {
    function generateElement(args) {
        const elementOutput = document.createElement(args.element);
        for (let arg in args) {
            if (typeof arg !== "undefined") {
                if (arg == "_for") {
                    elementOutput.setAttribute("for", args[arg]);
                } else {
                    elementOutput[arg] = args[arg];
                }
            }
        }
        return elementOutput;
    }

    function generateForm() {
        const form = document.createElement("form");
        const player1NameLabel = generateElement({element:"label",_for:"p1name",textContent:"Player 1 name"});
        const player1Name = generateElement({element:"input",type:"text",name:"p1name",placeholder:"p1name",id:"p1name"});
        const markerX = generateElement({element:"input",type:"radio",name:"marker",value:"X",id:"mx"});
        const markerXLabel = generateElement({element:"label",_for:"mx",textContent:"X"});
        const markerO = generateElement({element:"input",type:"radio",name:"marker",value:"O",id:"mo",checked:true,required:true});
        const markerOLabel = generateElement({element:"label",_for:"mo",textContent:"O"});
        const player2NameLabel = generateElement({element:"label",_for:"p2name",textContent:"Player 2 name"});
        const player2Name = generateElement({element:"input",type:"text",name:"p2name",placeholder:"p2name",id:"p2name"});
        const submit = generateElement({element:"button",type:"submit",textContent:"Save"});
        form.append(player1NameLabel, player1Name, player2NameLabel, player2Name,markerO,markerOLabel,markerX,markerXLabel,submit);

        return {form, player1Name, player2Name, markerX, markerXLabel, markerO, markerOLabel, submit};
    }

    function addDismissivePopup(popup) {
        function dismissPopup() {
            popup.remove();
        }
        popup.addEventListener("click", function(event) {
            if (this !== event.target) return;
            dismissPopup();
        }, false);
        function dismissPopupKey(event) {
            if (event.key.toLowerCase() == "escape") {
                popup.remove();
                document.body.removeEventListener("keydown", dismissPopupKey);
            }
        }

        const dismissBtn = document.createElement("button");
        dismissBtn.setAttribute("type", "button");
        dismissBtn.classList.add("dismiss-button");
        dismissBtn.textContent = "Dismiss";
        dismissBtn.addEventListener("click", dismissPopup);
        document.body.addEventListener("keydown", dismissPopupKey);

        return dismissBtn;
    }

    function generatePopup(dismissive) {
        const popup = document.createElement("div");
        popup.classList.add("popup");
        const popupContent = document.createElement("div");
        popupContent.classList.add("popup-content");
        popup.append(popupContent);
        document.body.append(popup);

        if (dismissive) {
            const dismissBtn = addDismissivePopup(popup, popupContent);
            return {popup, popupContent, dismissBtn};
        }
        return {popup, popupContent};
    }
    
    function getFormOutput(event, popup) {
        event.preventDefault();
        const form = event.target;
        const formFetch = new FormData(form);
        let vals = [];
        for (let value of formFetch.values()) {
            vals.push(value);
        }
        popup.remove();
        game({
            player1: {
                name: vals[0],
                marker: vals[2],
            },
            player2: {
                name: vals[1],
                marker: vals[2] == "O" ? "X" : "O",
            },
        })
    }

    (function popupStartInput() {
        const {popup, popupContent} = generatePopup(false);
        const {form, player1Name, player2Name,markerX,markerO,submit} = generateForm();
        popupContent.append(form);
        form.addEventListener("submit", function(event) {getFormOutput(event, popup)});
    })()

    const game = function(playersInput) {
        const mainGameDiv = document.querySelector("#main-game");
        let gameboard = new Array(9);
        gameboard.fill(null);

        // -----------------

        function checkWin() {
            const combinations = [
                "123", "456", "789",
                "147", "258", "369",
                "159", "357",
            ];

            let combinationsValidate = {};
            const allEqualInArray = arr => arr.every( v => v === arr[0] )

            const player = activePlayer.player;
            let win = false;
            combinations.forEach(combination => {
                combinationsValidate[combination] = [];
                combination.split('').forEach(box => {
                    combinationsValidate[combination].push(gameboard[+box - 1] == player.marker);
                })
                if (allEqualInArray(combinationsValidate[combination]) && combinationsValidate[combination][0]) {
                    player.addPoint();
                    console.log(`${JSON.stringify({name:player.name, marker:player.marker, points:player.points})} won`);
                    pubsub.publish("winTrue");
                    return;
                }
            });
            if (!win) {
                if (gameboard.find(field => field === null) === null) {
                    pubsub.publish("continueGame");
                } else {
                    pubsub.publish("draw");
                }
            }
        }

        // -----------------


        function popupWin() {
            const {popup, popupContent, dismissBtn} = generatePopup(true);
            popupContent.textContent = `${activePlayer.player.name} (${activePlayer.player.marker}) won!`;
            popupContent.append(dismissBtn);
        }
        function popupDraw() {
            const {popup, popupContent, dismissBtn} = generatePopup(true);
            popupContent.textContent = `It's a draw!`;
            popupContent.append(dismissBtn);
        }

        // -----------------

        function clearController() {
            while(mainGameDiv.lastElementChild) {
                mainGameDiv.lastElementChild.remove();
            }
        }
        function displayController() {
            clearController();
            let boxes = [];
            for (let i = 0; i < 9; i++) {
                let boxDiv = document.createElement("div");
                boxDiv.classList.add("box");
                boxDiv.setAttribute("data-id", i);
                boxDiv.textContent = gameboard[boxDiv.getAttribute("data-id")];
                boxDiv.addEventListener("click", function(event) {
                    changeField(boxDiv.getAttribute("data-id"));
                });
                boxes.push(boxDiv);
            }
            boxes.forEach(box => mainGameDiv.appendChild(box));
        }

        // -----------------

        class Player {
            constructor(name, marker) {
                this.name = name;
                this.marker = marker;
                this.points = 0;
            }
            changeName(newName) {
                this.name = newName;
            }
            changeMarker(newMarker) {
                this.marker = newMarker;
            }
            addPoint() {
                this.points++;
            }
        }
        let players = {
            player1: new Player(playersInput.player1.name, playersInput.player1.marker),
            player2: new Player(playersInput.player2.name, playersInput.player2.marker),
        }
        let activePlayer = Object.create({
            change() {
                this.player == players.player1
                    ? this.player = players.player2
                    : this.player = players.player1;
            },
            set(player) {
                if (player instanceof Player) {
                    this.player = player;
                } else {
                    throw new Error("No such player exists");
                }
            }
        });

        // -----------------

        function changeField(field) {

            if (gameboard[field] === null) {
                gameboard[field] = activePlayer.player.marker;
                pubsub.publish("fieldChange");
            } else if (gameboard[field] === undefined) {
                console.warn("No such field exists");
            } else {
                console.warn("Value already set");
            }
        }

        // -----------------

        pubsub.subscribe("fieldChange", displayController);
        pubsub.subscribe("fieldChange", checkWin);
        pubsub.subscribe("continueGame", () => {activePlayer.change()});
        pubsub.subscribe("draw", popupDraw);
        pubsub.subscribe("winTrue", popupWin);
        pubsub.subscribe("draw", () => {gameboard.fill(null);})
        pubsub.subscribe("winTrue", () => {gameboard.fill(null);})
        displayController();
        activePlayer.change()
    }
})()