let table = document.getElementById("table");
let param = document.getElementById("param");
const pass = document.getElementById("pass");
const revo = document.getElementById("revo");
let sovi = false;
let htable = "";

//[left, botleft, bottom, botright, right, topright, top, topleft]
const movec = [[0,-1],[1,-1],[1,0],[1,1],[0,1],[-1,1],[-1,0],[-1,-1]];

//0->nill, 1->yellow, 2->blue
let turn = 1
param.innerText = (turn == 1 ? "yellow" : "blue") + "man's turn" ;

let stone = new Array(8);
for(let i = 0; i < 8; i++) {
    stone[i] = new Array(8).fill(0);
}

for (let i = 0; i < 8; ++i){
    htable += `<tr id="tr-${i}">`;
    for (let j = 0; j < 8; ++j){
        htable += `<td id="td-${i}-${j}"></td>`;
    }
    htable += "</tr>";
}
table.innerHTML = htable;

stone[3][3] = 1; stone[4][4] = 1;
stone[4][3] = 2; stone[3][4] = 2;
document.getElementById("td-3-3").innerHTML = "<div class=\"stone yellow\"></div>";
document.getElementById("td-4-4").innerHTML = "<div class=\"stone yellow\"></div>";
document.getElementById("td-4-3").innerHTML = "<div class=\"stone blue\"></div>";
document.getElementById("td-3-4").innerHTML = "<div class=\"stone blue\"></div>";

table.addEventListener('click', e =>{
    let coord = document.elementFromPoint(e.clientX, e.clientY);
    if(coord.tagName != "TD")return;
    
    const stonegen = coord.id.split("-");
    //position of the stone to put right now
    let x = Number(stonegen[1]);
    let y = Number(stonegen[2]);
    
    if(stone[x][y] == 0/*nill stone*/){
        let canPlace = false;
        for(let i = 0; i < 8; i++){
            let moved = 0;
            let doFlip = new Array();
            while(true){
                ++moved
                //stone[x-position + x-move (<- x-move-amount * x-move-counter)]
                const nowX = x + movec[i][0] * moved;
                const nowY = y + movec[i][1] * moved;
                if(nowX < 0 || nowX > 7 || nowY < 0 || nowY > 7) break;//change vector because there's wall!
                let nowStone = stone[nowX][nowY];
                if(nowStone !=turn && nowStone != 0){
                    doFlip.push([x + movec[i][0] * moved, y + movec[i][1] * moved]);
                    }else if(nowStone == turn && moved > 1){
                        canPlace = true;
                        for(let i = 0; i < doFlip.length; i++){
                            stone[doFlip[i][0]][doFlip[i][1]] = turn;
                            const doFlipCell = document.getElementById(`td-${doFlip[i][0]}-${doFlip[i][1]}`).children[0]; 
                            doFlipCell.classList.remove(turn != 1 ? "yellow" : "blue");
                            doFlipCell.classList.add(turn == 1 ? "yellow" : "blue");
                        }
                        break;
                    }else{
                        break;
                }
            }
        }
        if(!canPlace)return;
        stone[x][y] = turn
        coord.innerHTML = `<div class="stone ${turn == 1 ? "yellow" : "blue"}"></div>`;
        turnchange();
    }
});

pass.addEventListener('click', e=>{
    if(sovi){
        leaderchange()
    }else{
        turnchange()
    }
});

function leaderchange(){
    turn = turn==1 ? 2 : 1;
    param.innerText = (turn == 1 ? "Stalin" : "Lenin") + "'s turn";
}
function turnchange(){
    turn = turn==1 ? 2 : 1;
    param.innerText = (turn == 1 ? "yellow" : "blue") + "man's turn";
}

revo.addEventListener('click', e=>{
    if(sovi)return;
    sovi = true;
        /*stone = stone.map(line=>{
            return line.map(cell=>{
                return 0;
            });
        });*/
        for(let i = 0; i < 8; i++){
            for(let j = 0; j < 8; j++){
                stone[i][j] = 0;
                document.getElementById(`td-${i}-${j}`).innerHTML = `<div class="flag"></div>`;
                turn = 2;
                param.innerText = "Lenin's turn";
            }
        }
    }
);