// ==UserScript==
// @name        Random Netflix List
// @namespace   https://www.netflix.com/
// @include     https://www.netflix.com/*
// @version     1
// ==/UserScript==

function Go(){
    if(!document.location.href.startsWith("https://www.netflix.com/browse/my-list")){
        //window.location.replace("https://www.netflix.com/browse/my-list");
        document.location.href = "https://www.netflix.com/browse/my-list?random=true";
        return;
    }
    Random();
}

var results = [];
function Random(play)
{
    // Get a list of all titles
    var movies = document.querySelectorAll(".slider-item");

    // pick a random number between 0 and length
    var random = Math.floor(Math.random() * movies.length);

    // this is our movie
    var movie = movies[random];
/*
    var org = movie;
    if(results.length < movies.length){
        while(results.includes(movie)){
            random++;
            if(random == movies.length){
                movie = org;
                break;
            }
            movie = movies[random];
        }
    } else {
        movie = org;
        results = [];
    }*/

    if(!results.includes(movie)){
        results.push(movie);
    }

    // we need to trigger three clicks, each one will make the next possible (due to dynamic rendering)
    if(movie == null){
        return;
    }

    var a = movie.getElementsByClassName("slider-refocus")[0].getAttribute('href');

    CreateButton(": " + random + "/" + movies.length);

    document.location.href = "https://www.netflix.com" + a;

    return;
}

window.onload = Check;

function Check(){
    results = [];
    if(document.location.href.startsWith("https://www.netflix.com/browse/my-list?randomPlay=true")){
        Random(true);
    } else if(document.location.href.startsWith("https://www.netflix.com/browse/my-list?random=true")){
        Random(false);
    } else {
        CreateButton("");
    }
}

function CreateButton(val){
    var input=document.createElement("input");
    input.type="button";
    input.value="Random" + val;
    input.onclick = Go;
    //input.style.position = fixed;
    input.style.bottom = "0px";
    input.style.right = "0px";
    input.style.width = "11%";
    input.style.border = "0px solid #FFFFFF";
    input.style.background = "000000";//"#141414";
    input.style.color = "#e50914";
    input.style.fontFamily = "'Helvetica Neue',Helvetica,Arial,sans-serif";

    //document.body.appendChild(input);
    //document.getElementsByClassName("title").appendChild(input);
    var aTags = document.getElementsByTagName("a");
    var searchText = "My List";
    var found;

    for (var i = 0; i < aTags.length; i++) {
        if (aTags[i].textContent == searchText) {
            found = aTags[i];
            //alert("found: " + found);
            break;
        }
    }

    if(found !== null){
        found.parentNode.parentNode.parentNode.appendChild(input);
    }
}