// ==UserScript==
// @name        Press Enter / Shift+Enter to navigate episodes
// @description Press Enter to go to next episode, Shift+Enter to go to previous episode
// @match       http://ysjdm6.com/*
// @match       http://agedm6.com/*
// @match       http://yuejuwu.me/*
// @match       http*://agedm1.com/*
// @match       http*://agedm2.com/*
// @match       http://ysjdm2.com/*
// @match       http://acgdmw.com/*
// @match       *://www.yhdm03.com/*
// @match       *://yhdm007.com/*
// @match       *://www.bumimi20.com/*
// @match       https://www.olevod.com/*
// @match       http://100.65.173.16:5244/*
// @match       http://192.168.10.102:5244/*
// @match       http://yhdm.in/*
// @match       http://www.iyinghua.com/*
// @match       https://www.mxdm.xyz/*
// @match       https://yhdm.one/*
// @match       https://yhdm6.top/*
// @version     1.0.2
// @run-at      document-start
// ==/UserScript==

document.addEventListener('keydown', function(event) {
  // 只在按下 Enter 时触发
  if (event.key === 'Enter') {
    const currentURL = window.location.href;
    const direction = event.shiftKey ? -1 : 1; // Shift+Enter → 上一集, Enter → 下一集

    // Pattern 1: /001.html
    let match = currentURL.match(/\/(\d+)\.(\w+)$/);
    if (match) {
      const pageNumber = match[1];
      const extension = match[2];
      const nextPageNumber = String(parseInt(pageNumber, 10) + direction).padStart(pageNumber.length, '0');
      const nextURL = currentURL.replace(`/${pageNumber}.${extension}`, `/${nextPageNumber}.${extension}`);
      window.location.href = nextURL;
      return;
    }

    // Pattern 2: /6467-1.html
    match = currentURL.match(/\/(\d+)-(\d+)\.(\w+)$/);
    if (match) {
      const seriesID = match[1];
      const currentPage = match[2];
      const extension = match[3];
      const nextPage = String(parseInt(currentPage, 10) + direction).padStart(currentPage.length, '0');
      const nextURL = currentURL.replace(`/${seriesID}-${currentPage}.${extension}`, `/${seriesID}-${nextPage}.${extension}`);
      window.location.href = nextURL;
      return;
    }

    // Pattern 3: /9314-2-6.html
    match = currentURL.match(/\/(\d+)-(\d+)-(\d+)\.(\w+)$/);
    if (match) {
      const id1 = match[1];
      const id2 = match[2];
      const page = match[3];
      const extension = match[4];
      const nextPage = String(parseInt(page, 10) + direction).padStart(page.length, '0');
      const currentPart = `/${id1}-${id2}-${page}.${extension}`;
      const nextPart = `/${id1}-${id2}-${nextPage}.${extension}`;
      const nextURL = currentURL.replace(currentPart, nextPart);
      window.location.href = nextURL;
      return;
    }

    // Pattern 4: /nid/X/
    match = currentURL.match(/(\/nid\/)(\d+)(\/?$)/);
    if (match) {
      const prefix = match[1];
      const numStr = match[2];
      const suffix = match[3];
      const nextNum = String(parseInt(numStr, 10) + direction);
      const nextURL = currentURL.replace(`${prefix}${numStr}${suffix}`, `${prefix}${nextNum}${suffix}`);
      window.location.href = nextURL;
      return;
    }

    // 可以继续加更多 pattern
  }
});

/*document.addEventListener('keydown', function(event) {
  if (event.key === 'Enter') {
    const currentURL = window.location.href;

    // General pattern: match any URL ending in .html, find last number before .html
    const match = currentURL.match(/(.*?)(\d+)(\.html)$/);
    if (match) {
      const prefix = match[1];       // Everything before the last number
      const numberStr = match[2];    // The number to increment
      const suffix = match[3];       // Usually ".html"

      const nextNumber = String(parseInt(numberStr, 10) + 1).padStart(numberStr.length, '0');
      const nextURL = `${prefix}${nextNumber}${suffix}`;
      window.location.href = nextURL;
    }
  }
});
*/