Number.prototype.pad = function(size) {
    var s = String(this);
    while (s.length < (size || 2)) {s = "0" + s;}
    return s;
}

const Mode = {
    Deposit: 0,
    Buy: 1,
    Transfer: 2,
}

let mode = Mode.Deposit;
let product_id = null;
let target_user = null;
let target_user_li = null;
let deposit = '0';
let button = document.createElement('a');
let button_transfer = document.createElement('a');
let input = document.getElementById('deposit-wrapper');
let amount = document.getElementById('deposit-amount');
let title = document.getElementById('deposit-title');
let userlist = document.getElementById('transfer-userlist');
let userlist_list = document.getElementById('transfer-userlist-list');
let ok_button = document.getElementById('numpad-ok');
button.classList.add('btn');
button.classList.add('btn-primary');
button.classList.add('me-2');
button.innerText = 'Deposit';
button.onclick = (ev) => {
    mode = Mode.Deposit;
    product_id = null;
    target_user = null;
    deposit = '0';
    title.innerText = 'Deposit';
    amount.innerText = (Math.floor(parseInt(deposit) / 100)) + '.' + (parseInt(deposit) % 100).pad();
    input.classList.add('show');
    userlist.classList.remove('show');
    ok_button.classList.remove('disabled');
};
button_transfer.classList.add('btn');
button_transfer.classList.add('btn-primary');
button_transfer.classList.add('me-2');
button_transfer.innerText = 'Transfer';
button_transfer.onclick = (ev) => {
    mode = Mode.Transfer;
    product_id = null;
    target_user = null;
    deposit = '0';
    title.innerText = 'Transfer';
    amount.innerText = (Math.floor(parseInt(deposit) / 100)) + '.' + (parseInt(deposit) % 100).pad();
    input.classList.add('show');
    userlist.classList.add('show');
    ok_button.classList.add('disabled');
};
setup_custom_price = (pid, pname) => {
    mode = Mode.Buy;
    product_id = pid;
    target_user = null;
    title.innerText = pname;
    deposit = '0';
    amount.innerText = (Math.floor(parseInt(deposit) / 100)) + '.' + (parseInt(deposit) % 100).pad();
    input.classList.add('show');
    userlist.classList.remove('show');
    ok_button.classList.remove('disabled');
};
set_transfer_user = (li, uid) => {
    if (target_user_li != null) {
	target_user_li.classList.remove('active');
    }
    target_user = uid;
    target_user_li = li;
    ok_button.classList.remove('disabled');
    target_user_li.classList.add('active');

}
scrollUserlist = (delta) => {
    userlist_list.scrollBy(0, delta);
}
deposit_key = (k) => {
    if (k == 'ok') {
	switch (mode) {
	    case Mode.Deposit:
		window.location.href = '/deposit?n=' + parseInt(deposit) + append_query_string;
		break;
	    case Mode.Buy:
		window.location.href = '/buy?pid=' + product_id + '&price=' + parseInt(deposit) + append_query_string;
		break;
	    case Mode.Transfer:
		if (target_user == null) {
		    return;
		}
		window.location.href = '/transfer?target=' + target_user + '&n=' + parseInt(deposit) + append_query_string;
		break;
	}
	mode = Mode.Deposit;
	deposit = '0';
	product_id = null;
	target_user = null;
	if (target_user_li != null) {
	    target_user_li.classList.remove('active');
	}
	input.classList.remove('show');
	userlist.classList.remove('show');
    } else if (k == 'del') {
	if (deposit == '0') {
	    product_id = null;
	    target_user = null;
	    if (target_user_li != null) {
		target_user_li.classList.remove('active');
	    }
	    userlist.classList.remove('show');
	    input.classList.remove('show');
	}
	deposit = deposit.substr(0, deposit.length - 1);
	if (deposit.length == 0) {
	    deposit = '0';
	}
	amount.innerText = (Math.floor(parseInt(deposit) / 100)) + '.' + (parseInt(deposit) % 100).pad();
    } else {
	if (deposit == '0') {
	    deposit = k;
	} else {
	    deposit += k;
	}
	amount.innerText = (Math.floor(parseInt(deposit) / 100)) + '.' + (parseInt(deposit) % 100).pad();
    }
};

let oldbuttons = document.getElementsByClassName("deposit-to-remove");
while (oldbuttons.length > 0) {
    oldbuttons[0].remove();
}
let list = document.getElementById("depositlist");
list.insertBefore(button_transfer, list.children[0]);
list.insertBefore(button, list.children[0]);