// ==UserScript==
// @name        [包子漫畫]快速前往下一話
// @namespace    http://tampermonkey.net/
// @version      0.52
// @description  按下N鍵 直接前往下一話，不用滾到最底下
// @author       dpes5407
// @match        *://*.webmota.com/comic/chapter*
// @match        *://*.baozimanhua.net/chapter*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=phpied.com
// @grant        none
// @noframes
// @supportURL  https://home.gamer.com.tw/profile/index.php?owner=dpes5407
// @license MIT
// @downloadURL none
// ==/UserScript==

(function () {
  "use strict";
  var baseUrl = window.location.href;
  generateBtn("copy", copyImgSrc);

  function getNextChapterUrl() {
    var arr = baseUrl.split("_");
    if (arr.length === 3) {
      arr[2] = arr[2].split(".")[0];
    }
    arr[2] = `${Number(arr[2]) + 1}`;
    return `${arr[0]}_${arr[1]}_${arr[2]}.html`
  }

  if (baseUrl.includes("baozimanhua")) {
    generateBtn("next", function () {
      window.location.href = getNextChapterUrl();
    });
  }
  if (baseUrl.includes("webmota")) {
    generateBtn("next", function () {
      window.location.href = getNextChapterUrl();
    });
  }

  function baozimanhua() {
    var elms = document.querySelectorAll(".j-rd-next");
    if (!elms) return;
    else {
      var urlArr = elms[1].outerHTML.replaceAll('"', " ").split(" ");
      var url = urlArr.filter((el) => el.indexOf("chapter") > -1).toString();
      document.onkeydown = function (e) {
        keyEvent(e, url);
      };
      return url;
    }
  }
  function webmota() {
    var elm = document.querySelector(".next_chapter");
    if (!elm) return;
    else {
      var url = elm.children[0].href;
      document.onkeydown = function (e) {
        keyEvent(e, url);
      };
      return url;
    }
  }
  function keyEvent(e, link) {
    var keyNum = window.event ? e.keyCode : e.which;
    if (keyNum == 78) {
      if (link) {
        window.location.href = link;
      } else {
        alert("已經是最後一話了!");
      }
    }
  }

  function generateBtn(text = "", func) {
    var el = document.createElement("button");
    el.innerHTML = text;
    el.style.color = "#ffffff";
    el.style.backgroundColor = "#000000";
    el.onclick = func;
    var nav = document.querySelector(".l-content");
    if (nav) {
      nav.append(el);
    } else {
      el.style.position = "fixed";
      el.style.right = 0;
      el.style.zIndex = 99999;
      document.body.append(el);
    }
  }
  function copyImgSrc(value) {
    var textarea = document.createElement("textarea");
    textarea.id = "temp_textarea";
    document.body.append(textarea);
    textarea.value = getImgSrc();
    textarea.select();
    textarea.setSelectionRange(0, 99999);
    document.execCommand("copy");
    document.getElementById("temp_textarea").remove();

    function getImgSrc() {
      var imgSrc = document.querySelector("img[src]").src || "";
      return imgSrc;
    }
  }
})();