let area = document.querySelector('#grid');
let group = document.querySelector('#group');

let mpos = [window.innerWidth / 2, window.innerHeight / 2];
let translate = "";
let width = 0;
let height = 0;
let center = [0, 0];
let lastPos = [0, 0];
let isMouse = false;
let zoom = 0.8;

genTrans();

function mouseMove(e) {
    lastPos = [e.clientX, e.clientY];
    if (!isMouse) return;
    mpos[0] += e.clientX - center[0];
    mpos[1] += e.clientY - center[1];
    center = lastPos;

    genTrans();
}

function mouseUp(e) {
    isMouse = false;
}

function mouseDown(e) {
    isMouse = true;
    center = [e.clientX, e.clientY];
}

function wheel(e) {
    mpos[0] -= lastPos[0];
    mpos[1] -= lastPos[1];

    mpos[0] *= 1.005 ** -e.deltaY;
    mpos[1] *= 1.005 ** -e.deltaY;

    mpos[0] += lastPos[0];
    mpos[1] += lastPos[1];

    zoom *= 1.005 ** -e.deltaY;

    genTrans();
}

function genTrans() {
    group.setAttribute('transform', `translate(${mpos[0]},${mpos[1]}), scale(${zoom},${zoom})`);
}

window.onwheel = wheel;
window.onmousemove = mouseMove;
window.onmouseup = mouseUp;
window.onmousedown = mouseDown;
window.ondblclick = doubleClick;

let tiles = {};
let colors = {
    '!nobody': 'rgb(255,255,255)'
};

let amounts = {
    '!nobody': -1
};

let areas = {};

function doubleClick(e) {
    if (!token) {
         window.location.href = 'https://nbg.dervland.net/login.php?next=' + encodeURIComponent(window.location.href);
    }

    let data = e.target.id.split('|').pop();

    data = data.split('_');

    if (e.target.id.startsWith('grid-claimed')) {
        socket.emit('conquer', { x: data[0], y: data[1] })
    } else if (e.target.id.startsWith('grid-select')) {
        socket.emit('claim', { x: data[0], y: data[1] })
    }
}

function getCookie(name) {
    const value = `; ${document.cookie}`;
    const parts = value.split(`; ${name}=`);
    if (parts.length === 2) return parts.pop().split(';').shift();
}

function renderRect(x, y, h, w) {
    let elem = document.createElementNS("http://www.w3.org/2000/svg", 'rect');
    elem.setAttribute('x', x);
    elem.setAttribute('y', y);
    elem.setAttribute('width', w);
    elem.setAttribute('height', h);
    elem.setAttribute('fill', 'white');
    elem.setAttribute('stroke', 'black');
    elem.setAttribute('stroke-width', '3.5');

    group.appendChild(elem);

    return elem;
}

function renderSelect(key, val) {
    let elem = renderRect(key[0] * 125, key[1] * 125, 125, 125);

    elem.id = `grid-select|${key[0]}_${key[1]}`;
}

function renderClaimed(key, val, data2) {
    for (let i in val.data) {
        if (i.startsWith('_')) continue;

        let space = val.data[i];

        let innerGroup = (space != '!nobody') ? [...document.querySelectorAll(`g`)].filter(x => x.id == space)[0] : false;

        let userData = data2[`_user_${space}`];

        colors[space] = userData ? userData.color : colors[space];

        if (space == '!nobody') {
            colors[space] = 'rgb(255,255,255)';
        }

        if (!colors[space]) {
            colors[space] = `hsl(${Math.random() * 360}deg,${Math.random() * 30 + 65}%,${Math.random() * 30 + 60}%)`
        }

        if (!amounts[space]) {
            amounts[space] = 0;
            areas[space] = [];
        }

        let x = i % 5;
        let y = Math.floor(i / 5);

        if (areas[space]) {
            let x2 = key[0] * 125 + x * 25;
            let y2 = key[1] * 125 + y * 25;

            let filter = areas[space].filter((a) => {
                return a.findIndex(([x, y]) => Math.abs(x2 - x) + Math.abs(y2 - y) < 2 * 25) != -1
            });

            let noFilter = areas[space].filter((a) => {
                return a.findIndex(([x, y]) => Math.abs(x2 - x) + Math.abs(y2 - y) < 2 * 25) == -1
            });

            areas[space] = [];

            areas[space].push(...noFilter);
            filter = [filter.flat(1)];

            areas[space].push(...(filter));

            if (filter.length == 0) {
                areas[space].push([[x2, y2]]);
            } else {
                areas[space][areas[space].length - 1].push([x2, y2]);
            }
        }

        amounts[space]++;

        if (!innerGroup && space != '!nobody') {
            let elem = document.createElementNS("http://www.w3.org/2000/svg", 'g');
            elem.id = space;

            group.appendChild(elem);

            innerGroup = elem;
        }

        let elem = renderRect(key[0] * 125 + x * 25, key[1] * 125 + y * 25, 25, 25);

        if (innerGroup) innerGroup.appendChild(elem);

        elem.setAttribute('fill', colors[space]);

        elem.id = `grid-claimed|${key[0] * 5 + x}_${key[1] * 5 + y}`;
    }

}

let biggestBox = (thing) => {
    let xVal = thing.map(x => Math.min(...x.map(y => y[0])));
    let yVal = thing.map(x => Math.min(...x.map(y => y[1])));

    let wVal = thing.map(x => Math.max(...x.map(y => y[0])) - Math.min(...x.map(y => y[0])));
    let hVal = thing.map(x => Math.max(...x.map(y => y[1])) - Math.min(...x.map(y => y[1])));
    let sVal = thing.map(x => (Math.max(...x.map(y => y[0])) - Math.min(...x.map(y => y[0]))) * ((Math.max(...x.map(y => y[1])) - Math.min(...x.map(y => y[1])))));

    let i = sVal.indexOf(Math.max(...sVal));

    return {
        x: xVal[i],
        y: yVal[i],
        width: wVal[i] + 25,
        height: hVal[i] + 25
    }
}

const socket = io(host);

socket.emit('area', { area: 'grid' });


var token = getCookie('token');
var noauth = false;

setTimeout(() => {
    if (token && window.location.search != '') window.location.href = '/';

    socket.emit('join', { token });
}, 800);

socket.on('data', (data) => {
    if (data == 'noauth') {
        noauth = true;
    }

    group.innerHTML = '';
    for (let key in data) {
        let val = data[key];

        let keyDecomp = key.split(',');

        if (val.type == 'select') {
            renderSelect(keyDecomp, val);
        } else if (val.type == 'claimed') {
            renderClaimed(keyDecomp, val, data);
        }
    }

    let groups = document.querySelectorAll(`g g`);

    for (let group of groups) {
        let box = biggestBox(areas[group.id])

        let id = group.id;

        let elem = document.createElementNS("http://www.w3.org/2000/svg", 'text');
        elem.setAttribute("x", box.x + box.width / 2);
        elem.setAttribute("y", box.y + box.height / 2 - box.width / 4);
        elem.setAttribute("font-size", box.width / 8 + "px");
        elem.setAttribute("stroke", "white");
        elem.setAttribute("stroke-width", box.width / 35)
        elem.setAttribute("paint-order", "stroke")
        elem.setAttribute('text-anchor', 'middle')

        let lines = [id, amounts[id]];

        for (let line of lines) {
            let tspan = document.createElementNS("http://www.w3.org/2000/svg", 'tspan');
            tspan.textContent = line;
            tspan.setAttribute('x', box.x + box.width / 2);
            tspan.setAttribute('dy', box.width / 6);
            elem.appendChild(tspan);
        }

        document.querySelector('svg > g').appendChild(elem);

        amounts[id] = 0;
    }
})

let cooldown = 0;
let lastTurn = 'nobody';

socket.on('cooldown', (cooldownIn) => {
    cooldown = cooldownIn;
})

socket.on('turn', (cooldownIn) => {
    lastTurn = cooldownIn;
})

setInterval(() => {
    let distance = new Date(cooldown) - new Date();

    if (distance < 0) {
        document.querySelector('.info').textContent = `The next turn is now, last turn was by ${lastTurn || 'nobody'}`;
    } else {
        document.querySelector('.info').textContent = `The next turn is in ${Math.floor(distance / 1000)} seconds, last turn was by ${lastTurn || 'nobody'}`;
    }

}, 100);

document.querySelector('#color').onchange = (e) => {
    socket.emit('color', e.target.value)
}