// ==UserScript==
// @name        Disable YouTube Video Ads
// @namespace   DisableYouTubeVideoAds
// @version     1.2.12
// @license     AGPLv3
// @author      jcunews
// @website     https://greasyfork.org/en/users/85671-jcunews
// @description Disable YouTube video & screen based ads at home page, and right before or in the middle of the main video playback. For new YouTube layout (Polymer) only.
// @include     https://www.youtube.com/*
// @grant       unsafeWindow
// @run-at      document-start
// @downloadURL none
// ==/UserScript==

((window, fn, ipse, haia, hca) => {

  fn = (a, et) => {

    if ((a = document.scripts[document.scripts.length - 1]) && (a.id === "dyvaUjs")) a.remove();

    et = window.InstallTrigger ? "beforescriptexecute" : "message"; //Firefox workaround

    window.XMLHttpRequest.prototype.open_dyva = window.XMLHttpRequest.prototype.open;
    window.XMLHttpRequest.prototype.open = function(mtd, url) {
      if (!(/get_midroll_info|get_video_info/).test(url)) {
        this.url_dyva = url;
        return this.open_dyva.apply(this, arguments);
      }
    };
    window.XMLHttpRequest.prototype.addEventListener_dyva = window.XMLHttpRequest.prototype.addEventListener;
    window.XMLHttpRequest.prototype.zaddEventListener = function(typ, fn) {
      if (typ === "readystatechange") {
        var f = fn;
        fn = function() {
          if ((this.readyState === 4) && (/\/watch\?/).test(this.url_dyva)) {
            var a = JSON.parse(this.responseText);
            a.forEach((p, a) => {
              if (p.player && p.player.args && p.player.args.player_response) {
                a = JSON.parse(p.player_response);
                patchPlayerResponse(a);
                p.player_response = JSON.stringify(a);
              } else if (p = p.playerResponse) {
                patchPlayerResponse(p);
              }
            });
            Object.defineProperty(this, "responseText", {writable: false, value: JSON.stringify(a)});
          }
          return f.apply(this, arguments);
        };
      }
      return this.addEventListener_dyva.apply(this, arguments);
    };
    
    window.Node.prototype.appendChild_dyva = window.Node.prototype.appendChild;
    window.Node.prototype.appendChild = function(node) {
      var a;
      if (!ipse && (a = document.querySelector('ytd-watch-flexy')) && (a = a.constructor.prototype) && a.isPlaShelfEnabled_) {
        a.isPlaShelfEnabled_ = () => false;
        ipse = true;
      }
      if ((!hca || !haia) && (a = document.querySelector('ytd-watch-next-secondary-results-renderer')) && (a = a.constructor.prototype)) {
        if (a.hasAllowedInstreamAd_ && !haia) {
          a.hasAllowedInstreamAd_ = () => false;
          haia = true;
        }
        if (a.hasCompanionAds_ && !hca) {
          a.hasCompanionAds_ = () => false;
          hca = true;
        }
      }
      if ((node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) && Array.from(node.childNodes).some((n, i) => {
        if (n.id === "masthead-ad") {
          n.remove();
          return true;
        }
      })) window.Node.prototype.appendChild = window.Node.prototype.appendChild_dyva;
      return this.appendChild_dyva.apply(this, arguments);
    };

    function patchPlayerResponse(playerResponse) {
      if (playerResponse.adPlacements) playerResponse.adPlacements = [];
      if (playerResponse.playerAds) playerResponse.playerAds = [];
    }

    function patchPlayerArgs(args, a) {
      if (args.ad_device) {
        args.ad_device = "0";
      }
      if (args.ad_flags) {
        args.ad_flags = 0;
      }
      if (args.ad_logging_flag) {
        args.ad_logging_flag = "0";
      }
      if (args.ad_preroll) {
        args.ad_preroll = "0";
      }
      if (args.ad_slots) {
        delete args.ad_slots;
      }
      if (args.ad_tag) {
        delete args.ad_tag;
      }
      if (args.ad3_module) {
        args.ad3_module = "0";
      }
      if (args.adsense_video_doc_id) {
        delete args.adsense_video_doc_id;
      }
      if (args.afv) {
        args.afv = false;
      }
      if (args.afv_ad_tag) {
        delete args.afv_ad_tag;
      }
      if (args.allow_html5_ads) {
        args.allow_html5_ads = 0;
      }
      if (args.csi_page_type) {
        args.csi_page_type = args.csi_page_type.replace(/watch7ad/, "watch7");
      }
      if (args.enable_csi) {
        args.enable_csi = "0";
      }
      if (args.pyv_ad_channel) {
        delete args.pyv_ad_channel;
      }
      if (args.show_pyv_in_related) {
        args.show_pyv_in_related = false;
      }
      if (args.vmap) {
        delete args.vmap;
      }
      if (args.player_response) {
        a = JSON.parse(args.player_response);
        patchPlayerResponse(a);
        args.player_response = JSON.stringify(a);
      }
    }

    function patchSpf() {
      if (window.spf && !spf.request_dyva) {
        spf.request_dyva = spf.request;
        spf.request = function(a, b) {
          if (b && b.onDone) {
            var onDone_ = b.onDone;
            b.onDone = function(response) {
              var a = response;
              if (a && (/\/watch\?/).test(a.url) && (a = a.response) && (a = a.parts)) {
                a.forEach((p, a) => {
                  if (p.player && p.player.args && p.player.args.player_response) {
                    a = JSON.parse((p = p.player.args).player_response);
                    patchPlayerResponse(a);
                    p.player_response = JSON.stringify(a);
                  } else if (p.playerResponse) {
                    patchPlayerResponse(p.playerResponse);
                  }
                });
              }
              return onDone_.apply(this, arguments);
            };
          }
          return this.request_dyva.apply(this, arguments);
        };
        return;
      }
    }
    
    function do2() {
      if (window.ytplayer && window.ytplayer.config && window.ytplayer.config.args && !window.ytplayer.config.args.dvya) {
        window.ytplayer.config.args.dvya = 1;
        patchPlayerArgs(window.ytplayer.config.args);
        removeEventListener(et, do2);
      } else if (et === "message") postMessage({});
    }
    
    function do1() {
      if (window.yt && window.yt.player && window.yt.player.Application && window.yt.player.Application.create && !window.yt.player.Application.dyva) {
        window.yt.player.Application.dyva = 1;
        var ytPlayerApplicationCreate = window.yt.player.Application.create;
        window.yt.player.Application.create = function(id, ytPlayerConfig) {
          if ((id === "player-api") && ytPlayerConfig && ytPlayerConfig.args && ytPlayerConfig.args.vmap) {
            delete ytPlayerConfig.args.vmap;
          }
          return ytPlayerApplicationCreate.apply(this, arguments);
        };
        var ytPlayerApplicationCreateAlternate = window.yt.player.Application.createAlternate;
        window.yt.player.Application.createAlternate = function(id, ytPlayerConfig) {
          if ((id === "player-api") && ytPlayerConfig && ytPlayerConfig.args && ytPlayerConfig.args.vmap) {
            delete ytPlayerConfig.args.vmap;
          }
          return ytPlayerApplicationCreateAlternate.apply(this, arguments);
        };
        var ytSetConfig = window.yt.setConfig;
        window.yt.setConfig = function(ytConfig){
          if (ytConfig) {
            if (ytConfig.ADS_DATA) {
              delete ytConfig.ADS_DATA;
            }
          }
          return ytSetConfig.apply(this, arguments);
        };
        var ytcfgSet = window.ytcfg.set;
        window.ytcfg.set = function(ytConfig){
          if (window.ytInitialPlayerResponse) patchPlayerResponse(window.ytInitialPlayerResponse);
          patchSpf();
          if (ytConfig) {
            if (ytConfig.SKIP_RELATED_ADS === false) {
              ytConfig.SKIP_RELATED_ADS = true;
            }
            if (ytConfig.TIMING_ACTION) {
              ytConfig.TIMING_ACTION = ytConfig.TIMING_ACTION.replace(/watch7ad/, "watch7");
            }
            if (ytConfig.TIMING_INFO) {
              if (ytConfig.TIMING_INFO.yt_ad) {
                ytConfig.TIMING_INFO.yt_ad = 0;
              }
              if (ytConfig.TIMING_INFO.yt_ad_an) {
                delete ytConfig.TIMING_INFO.yt_ad_an;
              }
              if (ytConfig.TIMING_INFO.yt_ad_pr) {
                ytConfig.TIMING_INFO.yt_ad_pr = 0;
              }
            }
          }
          return ytcfgSet.apply(this, arguments);
        };
        removeEventListener(et, do1);
        addEventListener(et, do2);
        do2();
      } else if (et === "message") postMessage({});
    }
    addEventListener(et, do1);
    if (et === "message") postMessage({});
    
    addEventListener("spfpartprocess", function(ev) { //old youtube
      if (ev.detail && ev.detail.part && ev.detail.part.data &&
          ev.detail.part.data.swfcfg && ev.detail.part.data.swfcfg.args) {
        patchPlayerArgs(ev.detail.part.data.swfcfg.args);
      }
    }, true);

  };
  if (this.GM_info && (this.GM_info.scriptHandler === "FireMonkey")) {
    //workaround for FireMonkey's partial compatibility to GreaseMonkey specification.
    let e = document.createElement("SCRIPT");
    e.id = "dyvaUjs";
    e.text = "(" + fn + ")()";
    document.documentElement.appendChild(e);
  } else fn();

})(unsafeWindow);