// Canvas board game
// Global variables
var ctx = null;
var tileW = 100, tileH = 100;
var mapW = 10, mapH = 10;

var tileMap = [
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 2, 1, 3, 1, 2, 1, 0, 0,
    0, 0, 1, 2, 1, 2, 1, 3, 0, 0,
    0, 0, 2, 1, 3, 1, 2, 1, 0, 0,
    0, 0, 1, 2, 1, 2, 1, 2, 0, 0,
    0, 0, 3, 1, 2, 1, 3, 1, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
];

// Left andright positions of beads, traps and text
var tiles = [
    {left: 220, bottom: 715},
    {left: 320, bottom: 715},
    {left: 420, bottom: 715, data: {type: "TRAP", move: "BACKWARDS", steps: 1, instruction: "Move back 1 step.", text: "A camp of evil thieves lays ahead of you, they are too many to confront and you decide to walk around them."}},
    {left: 520, bottom: 715},
    {left: 620, bottom: 715},
    {left: 720, bottom: 715},
    {left: 720, bottom: 615, data: {type: "TRAP", move: "FORWARDS", steps: 3, instruction: "Move forwards 3 steps.", text: "A friendly looking dragon is ahead of you and you decide to hitch a ride."}},
    {left: 620, bottom: 615},
    {left: 520, bottom: 615},
    {left: 420, bottom: 615},
    {left: 320, bottom: 615},
    {left: 220, bottom: 615},
    {left: 220, bottom: 515},
    {left: 320, bottom: 515},
    {left: 420, bottom: 515, data: {type: 'TRAP', move: "GAMBLE", instruction: "Roll 2, 4 or 6 to move forward or roll 1, 3 and 5 to move backwards.", text: "You are robbed of your travel supplies and continuing the journey may be dangerous. You decide to gamble on continuing the journey(roll: 2, 4, 6) or go back to get new supplies(roll: 1, 3, 5)."}},
    {left: 520, bottom: 515},
    {left: 620, bottom: 515},
    {left: 720, bottom: 515},
    {left: 720, bottom: 415},
    {left: 620, bottom: 415},
    {left: 520, bottom: 415},
    {left: 420, bottom: 415},
    {left: 320, bottom: 415},
    {left: 220, bottom: 415},
    {left: 220, bottom: 315, data: {type: 'TRAP', move: "BACKWARDS", steps: 3, instruction: "Move backwards 3 steps.", text: "A group of nightwalkers see you an you have to run!"}},
    {left: 320, bottom: 315},
    {left: 420, bottom: 315},
    {left: 520, bottom: 315},
    {left: 620, bottom: 315, data: {type: 'TRAP', move: "ROLLHIGH" , steps: 1, instruction: "Roll a 3 or above to win or move backwards 1 step.", text: "A war is being faught and you have to assist."}},
    {left: 720, bottom: 315}
];

// Draw canvas when window has loaded
window.onload = function() {
    ctx = document.querySelector(".canvas").getContext("2d");
    this.requestAnimationFrame(drawGame);
    ctx.font = 'bold 16px "Open Sans", sans-serif';
};

function drawGame() {
    if(ctx == null) {
        alert("Your browser does not support HTML canvas. Upgrade it to play the game.");
        return;
    }

    for(var y = 0; y < mapH; y++) {
        for(var x = 0; x < mapW; x++) {

            switch(tileMap[((y*mapW)+x)]) {
                case 1:
                    ctx.fillStyle = "#FFFFFF";
                    break;
                case 2:
                    ctx.fillStyle = "#5A6C7A";
                    break;
                case 3:
                    ctx.fillStyle = "#D3A52F";
                    break;
                default:
                    ctx.fillStyle = "#FFFFFF";
            }
            ctx.fillRect(x*tileW, y*tileH, tileW, tileH);
        }
    }

    // Draw board border
    ctx.beginPath();
    ctx.rect(200, 100, 600, 500);
    ctx.lineWidth = "2";
    ctx.strokeStyle = "#5A6C7A";
    ctx.stroke();

    // Draw board seperation lines
    ctx.beginPath();
    ctx.moveTo(200, 204);
    ctx.lineTo(700, 204);

    ctx.moveTo(300, 304);
    ctx.lineTo(800, 304);

    ctx.moveTo(200, 404);
    ctx.lineTo(700, 404);

    ctx.moveTo(300, 504);
    ctx.lineTo(800, 504);

    ctx.lineWidth = "8";
    ctx.strokeStyle = "#000000";
    ctx.stroke();

    // Draw images
    var throneImg = new Image();
    var warningImg = new Image();

    throneImg.onload = function (){
        ctx.drawImage(throneImg, 640, 620);

        ctx.drawImage(warningImg, 427, 125);
        ctx.drawImage(warningImg, 627, 225);
        ctx.drawImage(warningImg, 427, 325);
        ctx.drawImage(warningImg, 627, 525);
        ctx.drawImage(warningImg, 227, 525);
    }
    throneImg.src = "images/iron_throne_small.png";
    warningImg.src = "images/warning.png";

    // Draw text
    ctx.fillStyle = "#000000";
    ctx.fillText("GOAL", 727, 525);
    ctx.fillText("Who can reach the Iron Throne first?", 300, 700);
    ctx.fillText("Watch out for the yellow tiles, danger may be lurking!", 200, 70);
    ctx.fillText("If you roll a 6, you can roll again to avoid them!", 200, 90);

    ctx.fillStyle = "#FFFFFF";
    ctx.fillText("START", 223, 120);
};

// Function to spin dice on click
(function(){
    var div = document.querySelector('.dice-container');
    var dice = document.querySelector('#dice');
    var open = false;

    div.addEventListener('click', function(){
      if(open){
        dice.className = 'icon-dice';
      } else{
        dice.className = 'icon-dice rotate';
      }
      open = !open;
    });
})();

// Function to generate a number from 1-6
function rollDice() {
    var playerRoll = document.querySelector(".player-roll");
    var roll = Math.floor(Math.random() * 6) + 1;
    playerRoll.innerHTML = "You rolled a " + roll + ".";

    return roll;
};

// Move bead based on roll
// ...code
class Player{
    constructor(index, left_offset)
    {
        this.name = localStorage.getItem("player" + index);
        this.image = document.querySelector(".bead" + index);
        this.currentPosition = 0; // starting positon
        this.left_offset = left_offset;
        this.gambling = false;
        this.rollHigh = false;
        this.lastRoll = 0;

        if (this.image !== undefined)
        {
            var playerFN = this.name.split(' ', 1)[0];
            this.image.src = "images/" + playerFN + "_small.png";
        }
    }
}

var players = [
    new Player(1, 0.0),
    new Player(2, 30.0)
];
var currentPlayerIndex = 0;

var button = document.getElementById("dice");
var trapContainer = document.querySelector(".message-trap");
var playerTurnContainer = document.querySelector(".player-turn");
playerTurnContainer.innerHTML = players[0].name;

function updateBeadPosition() {
    var currentPosition = players[currentPlayerIndex].currentPosition;
    var leftOffset = players[currentPlayerIndex].left_offset;
    var bead = players[currentPlayerIndex].image;

    bead.style.left = (tiles[currentPosition].left + leftOffset) + 'px';
    bead.style.bottom = tiles[currentPosition].bottom + 'px';
};

function moveBead(amount) {
    // Set current position
    var currentPosition = players[currentPlayerIndex].currentPosition;
    currentPosition += amount;
    if (currentPosition < 0) currentPosition = 0;
    if (currentPosition >= tiles.length) currentPosition = tiles.length - 1;
    players[currentPlayerIndex].currentPosition = currentPosition;

    updateBeadPosition();

    // If on last, win!
    if (currentPosition === tiles.length - 1) {
        setTimeout(() => alert('You win!'), 1); // Temporary


        // localStorage.removeItem("player1");
        // localStorage.removeItem("player2");
        localStorage.setItem("winner", currentPlayerIndex); // Add winner to local storage for finale page
        // Disabled for testing: When a bead lands on the last tile go to window.location = "file:///F:/School_Noroff/2019_Year2_Semester1/2020-01-27_Semester-Project2_Lisa-Ingemann/WF/Web/finale.html";
    }
};

function swapPlayer() {
    currentPlayerIndex = (currentPlayerIndex == 0) ? 1 : 0;
    playerTurnContainer.innerHTML = players[currentPlayerIndex].name;
}

button.addEventListener("click", (e) => {
    var roll = rollDice();
    players[currentPlayerIndex].lastRoll = roll;
    console.log("roll " + roll);

    // TRAPS
    var trapInfo = document.querySelector(".text-trap");
    var trapInstructions = document.querySelector(".instruction");
    var trapH3 = document.querySelector(".message-trap h3");

    trapContainer.style.display = "none";

    var desiredMove = roll;
    if (players[currentPlayerIndex].gambling)
    {
        if ((roll % 2) == 1)
        {
            desiredMove = -roll;
        }
        players[currentPlayerIndex].gambling = false;
    }
    else if (players[currentPlayerIndex].rollHigh)
    {
        if (roll <= 3)
        {
            roll = -roll;
        }
        players[currentPlayerIndex].rollHigh = false;
    }

    console.log("Old Position " + players[currentPlayerIndex].currentPosition);
    moveBead(desiredMove);
    console.log("New Position " + players[currentPlayerIndex].currentPosition);

    if(desiredMove != 6)
    {
        // Traps go into esle statement if 6 is rolled conditonal - to avoid the traps
        // If bead lands on yellow tile, activate trap
        if(tiles[players[currentPlayerIndex].currentPosition].data == undefined){
            trapContainer.style.display = "none";
            swapPlayer();

        } else if(tiles[players[currentPlayerIndex].currentPosition].data.type == "TRAP") {
            // Display trap message and instructions if bead has landed on a trap
            trapContainer.style.display = "block";
            trapInfo.innerHTML = tiles[players[currentPlayerIndex].currentPosition].data.text;
            trapInstructions.innerHTML = tiles[players[currentPlayerIndex].currentPosition].data.instruction;
            dice.style.display = "none";
        }
    }
    else
    {
        dice.style.display = "none";
        trapInfo.innerHTML = "You rolled a 6 and skip any traps and get to roll again.";
        trapInstructions.innerHTML = "Roll again.";
        trapH3.innerHTML = "You Rolled a 6";
        trapContainer.style.display = "block";
    }
});

var trapOkBtn = document.querySelector(".accept-trap");
trapOkBtn.addEventListener("click", (e) => {
    var currentPosition = players[currentPlayerIndex].currentPosition;
    if (players[currentPlayerIndex].lastRoll !== 6)
    {
        var isTrap = tiles[currentPosition] !== undefined && tiles[currentPosition].data !== undefined;
        if (isTrap)
        {
            if(tiles[currentPosition].data.move == "BACKWARDS") {
                var backwards = tiles[currentPosition].data.steps;
                moveBead(-backwards);
            } else if(tiles[currentPosition].data.move == "FORWARDS") {
                var forwards = tiles[currentPosition].data.steps;
                moveBead(forwards)
            } else if(tiles[currentPosition].data.move == "GAMBLE") {
                // Wait for current player to roll again;
                players[currentPlayerIndex].gambling = true;
            } else if(tiles[currentPosition].data.move == "ROLLHIGH") {
                players[currentPlayerIndex].rollHigh = true;
            }
        }
        swapPlayer();
    }

    trapContainer.style.display = "none";
    dice.style.display = "block";
}); // Event listener to process traps