Element.prototype.insertAfter = function(element) {
    element.parentNode.insertBefore(this, element.nextSibling);
};

function get_cookie(cookiestr)
{
    return document.cookie
        .split(';')
        .find(row => row.startsWith(cookiestr+'='))
        .split('=')[1];
}

function construct_quick_reply_form(replyid)
{
    let src = document.createElement("form");
    src.action = "/status/create";
    src.method = "post";
    src.enctype = "multipart/form-data";
    src.className = "statusbox-quickreply";
    let hiddeninput = document.createElement("input");
    hiddeninput.type = "hidden";
    hiddeninput.name = "replyid"
    hiddeninput.value = replyid;
    let statusbox = document.createElement("div");
    statusbox.className = "statusbox statusbox-ani";

    let textarea = document.createElement("textarea");
    textarea.placeholder = "Just landed in N.Y.";
    textarea.rows = 5;
    textarea.tabindex = 1;
    textarea.name = "content";

    let statusfooter = document.createElement("div");
    statusfooter.className = "statusfooter";
    let statusfooter_sides = {
        left: document.createElement("div"),
        right: document.createElement("div"),
    }
    let select = document.createElement("select");
    let files_input = document.createElement("input");
    statusfooter_sides.left.className = "statusfooter-left";
    select.innerHTML = `
          <option value="public">Public</option>
          <option value="unlisted">Unlisted</option>
          <option value="private">Private</option>
          <option value="direct">Direct</option>
          <option value="local">Local</option>
    `.trim();
    files_input.type = "file";
    files_input.name = "file";
    files_input.tabindex = 4;
    files_input.multiple = "";

    statusfooter_sides.right.className = "statusfooter-right";
    let submitbtn = document.createElement("input");
    submitbtn.className = "btn post-btn";
    submitbtn.type = "submit";
    submitbtn.value = "Post";
    submitbtn.tabindex = 2;

    
    statusfooter_sides.left.appendChild(select);
    statusfooter_sides.left.appendChild(files_input);
    statusfooter_sides.right.appendChild(submitbtn);
    statusfooter.appendChild(statusfooter_sides.left);
    statusfooter.appendChild(statusfooter_sides.right);
    statusbox.appendChild(textarea);
    statusbox.appendChild(statusfooter);
    src.appendChild(hiddeninput);
    src.appendChild(statusbox);
    return src;
}

function construct_query(query)
{
    query_string = "";
    let keys = Object.keys(query);
    let vals = Object.values(query);
    const len = keys.length;

    for (let i = 0; i < keys.length; ++i)
    {
        query_string += keys[i] + "=" + vals[i];
        if (i !== keys.length-1)
            query_string += "&";
    }
    return query_string;
}

function send_request(url, query, type, cb, cb_args)
{
    let query_str = construct_query(query);
    let xhr = new XMLHttpRequest();
    xhr.open("POST", url);
    xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    xhr.onreadystatechange = function() {
        if (this.readyState === XMLHttpRequest.DONE)
            cb(this, cb_args);
    };
    xhr.send(query_str);
}

function change_count_text(val, sum)
{
    if (val === "")
        val = 0
    else
        val = parseInt(val);
    val += sum;
    return val > 0 ? val.toString() : "";
}

function interact_action(status, type)
{
    let like = status.querySelector(".like");
    let repeat = status.querySelector(".repeat");
    
    let svg;
    if (type.value === "like" || type.value === "unlike")
        svg = [ like ];
    else if (type.value === "repeat" || type.value === "unrepeat")
        svg = [ repeat ];
    else if (type.value === "likeboost")
        svg = [ like, repeat ];
    
    svg.forEach(that => {
        let label = that.parentNode;
        let counter = label.querySelector(".count");
        
        let is_active = that.classList.contains("active");
        
        that.classList.toggle("active");

        // Flip itype value
        if (type.value.substr(0, 2) === "un")
            type.value = type.value.replace("un", "");
        else
            type.value = "un" + type.value;
        
        counter.innerHTML = change_count_text(counter.innerHTML, is_active ? -1 : 1);
    });
}

function status_interact_props(e)
{
    let interact = e.target.closest(".statbtn");
    let type = interact.parentNode.querySelector(".itype");
    if (type === null)
        return true;
    let status = interact.closest(".status");

    send_request("/treebird_api/v1/interact",
                 {
                     id: status.id,
                     itype: type.value
                 },
                 1,
                 (xhr, args) => {
                     if (xhr.status !== 200)
                     {
                         // Undo action if failure
                         interact_action(status, type);
                     }
                 }, null);

    interact_action(status, type);
    
    e.preventDefault();
    return false;
}

function create_reply_form(e)
{
    e.preventDefault();
    let status = e.target.closest(".status");

    if (status.nextSibling.className === "statusbox-quickreply")
    {
        status.nextSibling.remove();
    }
    else {
        let form = construct_quick_reply_form(status.id);
        form.insertAfter(status);
        
    }
    
    
    return false;
}

// Main
(function() {
    let reply_btn = document.getElementsByClassName("reply-btn");
    let interact_btn = document.getElementsByClassName("statbtn");

    for (let i = 0; i < reply_btn.length; ++i)
    {
        reply_btn[i].addEventListener('click', create_reply_form);
    }

    for (let i = 0; i < interact_btn.length; ++i)
    {
        interact_btn[i].addEventListener('click', status_interact_props);
    }
})();