// ==UserScript==
// @name         NodeSeek自动上传到屋舍图床并插入md链接
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  在nodeseek.com的论坛中自动上传图片到屋舍图床并插入Markdown链接
// @author       WiseScripts
// @match        https://www.nodeseek.com/*
// @grant        GM_xmlhttpRequest
// @downloadURL none
// ==/UserScript==

(function() {
  'use strict';

  document.addEventListener('paste', (event) => handlePaste(event));

  async function handlePaste(event) {
    const items = (event.clipboardData || event.originalEvent.clipboardData).items;
    let imageFiles = [];

    for (let item of items) {
      if (item.kind === 'file' && item.type.indexOf('image/') !== -1) {
        let blob = item.getAsFile();
        imageFiles.push(blob);
      }
    }

    if (imageFiles.length > 0) {
      event.preventDefault();
      for (let file of imageFiles) {
        let formData = new FormData();
        formData.append('file', file);
        await uploadToImageHost(formData);
      }
    }
  }

  function uploadToImageHost(formData) {
    return new Promise((resolve, reject) => {
      GM_xmlhttpRequest({
        method: 'POST',
        url: 'https://uhsea.com/Frontend/upload',
        data: formData,
        onload: (response) => {
          let jsonResponse = JSON.parse(response.responseText);
          if (response.status === 200 && jsonResponse && jsonResponse.data) {
            insertToEditor(jsonResponse.data);
          } else {
            mscAlert('图片上传成功，但未获取到Markdown链接');
          }
          resolve();
        },
        onerror: (error) => {
          mscAlert('图片上传遇到错误，请检查网络或稍后重试。');
          reject(error);
        }
      });
    });
  }

  function insertToEditor(Link) {
    const codeMirrorElement = document.querySelector('.CodeMirror');
    if (codeMirrorElement) {
      const codeMirrorInstance = codeMirrorElement.CodeMirror;
      if (codeMirrorInstance) {
        const cursor = codeMirrorInstance.getCursor();
        let markdownLink = '![](' + Link + ')';
        copyTextToClipboard(markdownLink);
        codeMirrorInstance.replaceRange(markdownLink + '\n', cursor);
      }
    }
  }

function copyTextToClipboard(text) {
    var textArea = document.createElement("textarea");
    textArea.style.position = 'fixed';
    textArea.style.top = 0;
    textArea.style.left = 0;
    textArea.style.width = '2em';
    textArea.style.height = '2em';
    textArea.style.padding = 0;
    textArea.style.border = 'none';
    textArea.style.outline = 'none';
    textArea.style.boxShadow = 'none';
    textArea.style.background = 'transparent';
    textArea.value = text;
    document.body.appendChild(textArea);
    textArea.focus();
    textArea.select();
    try {
      var successful = document.execCommand('copy');
      var msg = successful ? 'successful' : 'unsuccessful';
      console.log('Copying text command was ' + msg);
    } catch (err) {
      console.log('Oops, unable to copy');
    }

    document.body.removeChild(textArea);
  }  
})();