var recordsBuffer = [];
var availableZones = [];
var currentZone;

function addRecord(record) {
    recordsBuffer.push(record);
    refreshRecordsList();
}

function delRecord(index) {
    recordsBuffer.splice(index, 1);
    refreshRecordsList();
}

function refreshRecordsList() {
    var buf = "";
    if (recordsBuffer.length > 0) {
        buf = "<label class=\"label\">Records:</label>\n";
    }
    function getInput(text) {
        if (typeof text === "string"){
            // TODO sanitize
        }
        return '<input class="input" type="text" value="' + text + '" readonly>';
    }

    function makeRecord(value, index, array) {
        var data = value.addr;
        if (value.type == "MX") {
            data = value.priority + " " + value.host;
        } else if (value.type == "CNAME") {
            data = value.host;
        } else if (value.type == "TXT") {
            data = value.data;
        } else if (value.type == "SRV") {
            data = value.priority + " " + value.weight + " " + value.port + " " + value.host;
        }

        var text = "<div class=\"field is-grouped\">" +
               "<input class=\"input\" type=\"text\" value=\"{1}\" readonly>" +
               "<input class=\"input ml-3 has-text-centered\" type=\"text\" size=\"6\" style=\"width: 20%;\" value=\"{2}\" readonly>" +
               "<input class=\"input ml-3 has-text-centered\" type=\"text\" size=\"6\" style=\"width: 20%;\" value=\"{3}\" readonly>" +
               "<input class=\"input ml-3\" type=\"text\" value=\"{4}\" readonly>" +
               "<button class=\"button is-danger is-outlined ml-3\" id=\"record_delete\" onclick=\"delRecord({5});\">" +
               "  <span class=\"icon is-small\">" +
               "    <svg viewBox=\"0 0 24 24\" style=\"width: 20px; height: 20px;\"><path d=\"M22.54 16.88L20.41 19L22.54 21.12L21.12 22.54L19 20.41L16.88 22.54L15.47 21.12L17.59 19L15.47 16.88L16.88 15.47L19 17.59L21.12 15.46L22.54 16.88M12 13C10.9 13 10 13.9 10 15S10.9 17 12 17 14 16.1 14 15 13.1 13 12 13M13.35 21H5.5C4.58 21 3.81 20.38 3.58 19.54L1.04 10.27C1 10.18 1 10.09 1 10C1 9.45 1.45 9 2 9H6.79L11.17 2.45C11.36 2.16 11.68 2 12 2S12.64 2.16 12.83 2.44L17.21 9H22C22.55 9 23 9.45 23 10L22.97 10.27L22 13.81C21.43 13.5 20.79 13.24 20.12 13.11L20.7 11H3.31L5.5 19H13C13 19.7 13.13 20.37 13.35 21M9.2 9H14.8L12 4.8L9.2 9Z\"></path></svg>" +
               "  </span>" +
               "</button>" +
               "</div>";
        buf += text.replace("{1}", value.domain)
                   .replace("{2}", value.type)
                   .replace("{3}", value.ttl)
                   .replace("{4}", data)
                   .replace("{5}", index);
    }

    recordsBuffer.forEach(makeRecord);
    document.getElementById("domain_records").innerHTML = buf;
}

function showNewRecordDialog() {
    var button_positive = document.getElementById("new_record_positive_button");
    button_positive.onclick = function() {
        checkRecord(get_record_from_dialog());
    };

    var button_negative = document.getElementById("new_record_negative_button");
    button_negative.onclick = function() {
        var dialog = document.getElementById("new_record_dialog");
        dialog.className = "modal";
        refreshRecordsList();
    }

    var dialog = document.getElementById("new_record_dialog");
    dialog.className = "modal is-active";
}

function get_record_from_dialog() {
    var record_name = document.getElementById("record_name").value.toLowerCase();
    var record_type = document.getElementById("record_type").value;
    var record_ttl = parseInt(document.getElementById("record_ttl").value);
    var record_data = document.getElementById("record_data").value;
    if (record_type == "CNAME" || record_type == "NS") {
        return { type: record_type, domain: record_name, ttl: record_ttl, host: record_data }
    } else if (record_type == "MX") {
        var record_priority = parseInt(document.getElementById("record_priority").value);
        return { type: record_type, domain: record_name, ttl: record_ttl, priority: record_priority, host: record_data }
    }  else if (record_type == "TXT") {
        return { type: record_type, domain: record_name, ttl: record_ttl, data: record_data }
    } else if (record_type == "SRV") {
        var record_priority = parseInt(document.getElementById("record_priority").value);
        var record_weight = parseInt(document.getElementById("record_weight").value);
        var record_port = parseInt(document.getElementById("record_port").value);
        return { type: record_type, domain: record_name, ttl: record_ttl, priority: record_priority, weight: record_weight, port: record_port, host: record_data }
    }
    return { type: record_type, domain: record_name, ttl: record_ttl, addr: record_data }
}

function onLoad() {
    external.invoke(JSON.stringify({cmd: 'loaded'}));
}

function openTab(element, tabName) {
    // Declare all variables
    var i, tabContent, tabLinks;

    // Get all elements with class="content" and hide them
    tabContent = document.getElementsByClassName("tab content");
    for (i = 0; i < tabContent.length; i++) {
        tabContent[i].className = "tab content is-hidden";
    }

    // Get all elements with class="tab" and remove the class "is-active"
    tabLinks = document.getElementsByClassName("tab is-active");
    for (i = 0; i < tabLinks.length; i++) {
        tabLinks[i].className = "tab";
    }

    // Show the current tab, and add an "is-active" class to the button that opened the tab
    document.getElementById(tabName).className = "tab content";
    element.parentElement.className = "tab is-active";
    refreshRecordsList();
}

function toggle(element, event) {
  event.stopPropagation();
  element.classList.toggle('is-active');
}

function loadKey() {
    external.invoke(JSON.stringify({cmd: 'loadKey'}));
}

function createKey() {
    external.invoke(JSON.stringify({cmd: 'createKey'}));
}

function saveKey() {
    external.invoke(JSON.stringify({cmd: 'saveKey'}));
}

function checkRecord(data) {
    external.invoke(JSON.stringify({cmd: 'checkRecord', data: JSON.stringify(data)}));
}

function recordOkay(okay) {
    if (okay) {
        addRecord(get_record_from_dialog()); // It will refresh list
        var dialog = document.getElementById("new_record_dialog");
        dialog.className = "modal";
    } else {
        showWarning('Record is not valid!');
    }
}

function createDomain() {
    var new_domain = document.getElementById("new_domain").value.toLowerCase();
    var new_dom_records = JSON.stringify(recordsBuffer);
    var domain = new_domain + "." + currentZone.name;
    external.invoke(JSON.stringify({cmd: 'mineDomain', name: domain, records: new_dom_records}));
}

function domainMiningStarted() {
    recordsBuffer = [];
    refreshRecordsList();
}

function createZone() {
    var new_zone = document.getElementById("new_zone").value;
    var difficulty = document.getElementById("new_zone_difficulty").value;
    obj = {};
    obj.name = new_zone;
    obj.difficulty = parseInt(difficulty);
    data = JSON.stringify(obj);
    external.invoke(JSON.stringify({cmd: 'mineZone', name: new_zone, data: data}));
}

function sendAction(param) {
    external.invoke(JSON.stringify(param));
}

function onDomainChange(element) {
    if (typeof currentZone !== 'undefined') {
        var domain = element.value + "." + currentZone.name;
        external.invoke(JSON.stringify({cmd: 'checkDomain', name: domain}));
    }
}

function domainAvailable(available) {
    var input = document.getElementById("new_domain");
    var button = document.getElementById("new_domain_button");
    var button2 = document.getElementById("add_record_button");
    if (available) {
        input.className = "input";
        button.disabled = false
        button2.disabled = false
    } else {
        input.className = "input is-danger";
        button.disabled = true
        button2.disabled = true
    }
}

function onZoneChange() {
    var button = document.getElementById("new_zone_button");
    var diff = document.getElementById("new_zone_difficulty");
    d = parseInt(diff.value);
    // Checking for NaN first
    if (d != d || d < 20 || d > 50) {
        button.disabled = true;
        diff.className = "input is-danger";
    } else {
        diff.className = "input";
        var input = document.getElementById("new_zone");
        external.invoke(JSON.stringify({cmd: 'checkZone', name: input.value}));
    }
}

function zoneAvailable(available) {
    var input = document.getElementById("new_zone");
    var button = document.getElementById("new_zone_button");
    if (available) {
        input.className = "input";
        button.disabled = false;
        var diff = document.getElementById("new_zone_difficulty");
        d = parseInt(diff.value);
        // Checking for NaN first
        if (d != d || d < 20 || d > 50) {
            button.disabled = true;
            diff.className = "input is-danger";
        }
    } else {
        input.className = "input is-danger";
        button.disabled = true;
    }
}

function showModalDialog(text, callback) {
    var message = document.getElementById("modal_text");
    message.textContent = text;

    var button_positive = document.getElementById("modal_positive_button");
    button_positive.onclick = function() {
        callback();
        dialog = document.getElementById("modal_dialog");
        dialog.className = "modal";
    };

    var button_negative = document.getElementById("modal_negative_button");
    button_negative.onclick = function() {
        dialog = document.getElementById("modal_dialog");
        dialog.className = "modal";
    }

    var dialog = document.getElementById("modal_dialog");
    dialog.className = "modal is-active";
}

function showWarning(text) {
    var warning = document.getElementById("notification_warning");
    var message = document.getElementById("warning_text");
    message.innerHTML = text;

    warning.className = "notification is-warning";
    var button = document.getElementById("warning_close");
    button.onclick = function() {
        message.value = "";
        warning.className = "notification is-warning is-hidden";
    }
    setTimeout(button.onclick, 5000);
}

function showSuccess(text) {
    var warning = document.getElementById("notification_success");
    var message = document.getElementById("success_text");
    message.innerHTML = text;

    warning.className = "notification is-success";
    var button = document.getElementById("success_close");
    button.onclick = function() {
        message.value = "";
        warning.className = "notification is-success is-hidden";
    }
}

function showMiningIndicator(visible, blue) {
    var indicator = document.getElementById("busy_indicator");
    var parent = document.getElementById("indicator_parent");
    var add = "";
    if (blue) {
        add = " busy_blue";
    }
    if (visible) {
        indicator.className = 'busy_indicator' + add;
        parent.style.display = 'flex';
    } else {
        indicator.className = 'busy_indicator is-hidden';
        parent.style.display = 'none';
    }
}

function miningIndicatorClick(element) {
    showModalDialog("Do you really want to stop mining?", function() {
        external.invoke(JSON.stringify({cmd: 'stopMining'}));
    });
}

function setLeftStatusBarText(text) {
    var bar = document.getElementById("status_bar_left");
    bar.innerHTML = text;
}

function setRightStatusBarText(text) {
    var bar = document.getElementById("status_bar_right");
    bar.innerHTML = text;
}

function keystoreChanged(path, pub_key, hash) {
    if (path == '') {
        path = "In memory";
    }
    var public_key_hash = document.getElementById("public_key_hash");
    public_key_hash.value = hash;

    var save_key = document.getElementById("save_key");
    save_key.disabled = false;

    var new_domain = document.getElementById("new_domain");
    new_domain.disabled = false;

    var new_zone = document.getElementById("new_zone");
    new_zone.disabled = false;
    var new_zone_difficulty = document.getElementById("new_zone_difficulty");
    new_zone_difficulty.disabled = false;
}

function refreshZonesList() {
    var buf = "";
    availableZones.forEach(function(value, index, array) {
        var zone = value.name + " (" + value.difficulty + "🔥)";
        var add_class = "";
        if (typeof currentZone !== 'undefined' && currentZone.name == value.name) {
            add_class = "is-active";
        }
        buf += "<a id=\"zone-{1}\" class=\"dropdown-item {2}\" onclick=\"changeZone('{3}');\">.{4}</a>"
            .replace("{1}", value.name)
            .replace("{2}", add_class)
            .replace("{3}", value.name)
            .replace("{4}", zone);
    });
    var links = document.getElementById("zones-links");
    links.innerHTML = buf;
    if (typeof currentZone !== 'undefined') {
        var cur_name = document.getElementById("zones-current-name");
        cur_name.innerHTML = "." + currentZone.name + " (" + currentZone.difficulty + "🔥)";
    }
}

function zonesChanged(text) {
    availableZones = JSON.parse(text);
    currentZone = availableZones[0];
    refreshZonesList();
}

function changeZone(zone) {
    availableZones.forEach(function(value, index, array) {
        if (value.name == zone) {
            currentZone = value;
        }
    });
    refreshZonesList();
}