// ==UserScript==
// @name         Find on Nyaa
// @namespace    MALFindNya
// @version      2.1
// @description  Will open nyaa on a new window and search for the anime title
// @author       Samu
// @match        https://myanimelist.net/anime/*
// @match        https://myanimelist.net/anime.php?id=*
// @match        https://anilist.co/*
// @match        https://kitsu.io/*
// @match        https://www.anime-planet.com/*
// @grant        none
// @downloadURL none
// ==/UserScript==

/**
  icon source
  https://icons8.com/icon/82838/external-link
  https://ezgif.com/image-to-datauri
**/

//** SETTINGS **//
let sortBy = "seeders";                       // "comments", "size", "id", "seeders", "leechers", or "downloads"
let filter = "0";                             // 0 = No Filter | 1 = No remakes | 2 = Trusted Only
let category = "AnimeEnglishTranslated";      // Check values below
let favoriteGroups = ["Judas", "Erai-raws"];  // List is ordered, favorite should be first
let searchPrefix = "";
let searchSufix = "";
//** END OF SETTINGS **//

const cat = {
  Allcategories: "0_0",
  Anime: "1_0",
  AnimeMusicVideo: "1_1",
  AnimeEnglishTranslated: "1_2",
  AnimeNonEnglishTranslated: "1_3",
  Raw: "1_4",
  Audio: "2_0",
  Lossless: "2_1",
  Lossy: "2_2",
  Literature: "3_0",
  LiteratureEnglishTranslated: "3_1",
  LiteratureNonEnglishTranslated: "3_2",
  LiteratureRaw: "3_3",
  LiveAction: "4_0",
  LiveActionEnglishTranslated: "4_1",
  IdolPromotionalVideo: "4_2",
  LiveActionNonEnglishTranslated: "4_3",
  LiveActionRaw: "4_4",
  Pictures: "5_0",
  Graphics: "5_1",
  Photos: "5_2",
  Software: "6_0",
  Applications: "6_1",
  Games: "6_2",
};

const buttonId = "FindOnNyaaButtonId";

(function() {
  'use strict';

  let pushState = history.pushState;
  let replaceState = history.replaceState;

  history.pushState = function() {
      pushState.apply(history, arguments);
      window.dispatchEvent(new Event('pushstate'));
      window.dispatchEvent(new Event('locationchange'));
  };

  history.replaceState = function() {
      replaceState.apply(history, arguments);
      window.dispatchEvent(new Event('replacestate'));
      window.dispatchEvent(new Event('locationchange'));
  };

  window.addEventListener('popstate', function() {
      window.dispatchEvent(new Event('locationchange'))
  });

  let host = window.location.host;
  let path = window.location.pathname;

  window.addEventListener('locationchange', function() {
    path = window.location.pathname;
    lookForTitleElement(host, path);
  });

  lookForTitleElement(host, path);
  
})();

function lookForTitleElement(host, path) {
  if (host === "myanimelist.net") {
    waitForElm('.title-name').then((elm) => init(elm));
  } else if (host === "anilist.co" && path.startsWith("/anime/")) {
    waitForElm('.page-content .header .content > h1').then((elm) => init(elm));
  } else if (host === "kitsu.io" && path.startsWith("/anime/")) {
    waitForElm('.media--title h3').then((elm) => init(elm));
  } else if (host === "www.anime-planet.com" && path.startsWith("/anime/")) {
    waitForElm('#siteContainer h1').then((elm) => init(elm));
  } else {
    return;
  }
}

function init(element) {
  let url = createUrl(element);
  let nyaaButton = document.getElementById(buttonId);
  if (nyaaButton == null) {
    nyaaButton = createButton(url);
  } else {
    nyaaButton.setAttribute("href", url);
  }
  element.appendChild(nyaaButton);
}

function createButton(url) {
  let button = document.createElement("a");
  button.id = buttonId;
  button.innerHTML = "";
  button.setAttribute("href", url);
  button.setAttribute("target", "_blank");
  button.setAttribute("rel", "noopener");
  button.setAttribute("title", "Search on Nyaa");
  button.setAttribute("style", "margin-left: 10px;height: 10px;width: 10px;background-size: cover;display: inline-block;transform: scale(1.8);vertical-align: top;margin-top: 7px;");
  button.style.backgroundImage = "url(data:image/png;base64,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)";
  return button;
}

function createUrl(element) {
  let textFragment = ":~:text=" + favoriteGroups.join("&text=");
  let title = element.textContent.trim().replace(/[^a-zA-Z0-9]+/g, "+");
  let query = [searchPrefix, title.trim(), searchSufix].join(" ").trim();
  let queryURI = encodeURI(query);
  let baseUrl = "https://nyaa.si/";
  let path = `?f=${filter}&c=${cat[category]}&s=${sortBy}&o=desc&q=${queryURI}`;
  return baseUrl + path + "#" + textFragment;
}

function waitForElm(selector) {
  return new Promise(resolve => {
    if (document.querySelector(selector)) {
      return resolve(document.querySelector(selector));
    }

    const observer = new MutationObserver(mutations => {
      if (document.querySelector(selector)) {
        resolve(document.querySelector(selector));
        observer.disconnect();
      }
    });

    observer.observe(document.body, {
      childList: true,
      subtree: true
    });
  });
}