class Utils {
  constructor() {
  }

  query(name) {
    var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
    var r = window.location.search.substr(1).match(reg);
    if(r!=null)return  unescape(r[2]); return null;
  }

  footer() {
    var footerList = [
      { title: '首页', img: 'icon-home', isActve: true, url: './index.html' },
      { title: '机构', img: 'icon-jigou', isActve: false, url: './mechanism.html' },
      { title: '模特', img: 'icon-me', isActve: false, url: './model.html' },
      { title: '我的', img: 'icon-wo', isActve: true, url: './me.html' },
    ];

    // 当前访问的页面地址
    var currentUrl = location.href.match(/page\/([\s\S]*?).html/)[1]

    $("body").append(`
      <ul class="footer">
        ${
      footerList.map((v,i) => {
        return `<li class="${ v.url.includes(currentUrl) ? 'footer_active': '' }">
                <a href="${v.url}">
                  <i class="iconfont ${v.img}"></i>
                  <p>${v.title}</p>
                </a>
            </li>`
      }).toString().replaceAll(",","")
    }
      </ul>
    `)
  }


  item(father, data) {
    var li = ""
    data.forEach(v => {
      li+= `
         <li>
          <div class="newest_img">
            <a href="./info.html?id=${v.id}">
              <img src="${v.preview}" alt="">
              <span>${v.total}</span>
            </a>
          </div>
          <div class="newest_text">
            <div class="t">${v.title}</div>
            ${
                v.user.length != 0 
                  ? `<div class="source">${v.user}</div>`
                  : ''
              }
            
            ${
                v.source.length != 0
                  ? `<div class="source">${v.source}</div>`
                  : ''
              }
          </div>
         
          <div class="tags">
           ${
              v?.tags.map((item) => {
                return ` <a class="tags_item" href="">${item.title}</a>`
              }).toString().replaceAll(",","")
            }
          </div>
        </li>
      `
    })
    $(father).append(li)
  }

  pHeader(title, right_action = "") {
    $("body").prepend(`
        <div class="pub_header themeColor padding_16">
           <div class="back">
             <i class="iconfont icon-back1"></i>
             <span>${title}</span>
           </div>
      
           <div class="right_action">
              ${right_action}
           </div>
      
         </div>
    `);

    $(".pub_header .icon-back1").click(() => history.back())

    if ($(".icon-home").length != 0) {
      $(".icon-home").click(() => location.href = "./index.html" )
    }
  }

  initPhotoSwipeFromDOM(gallerySelector) {
    // parse slide data (url, title, size ...) from DOM elements
    // (children of gallerySelector)
    var parseThumbnailElements = function(el) {
      var thumbElements = el.childNodes,
        numNodes = thumbElements.length,
        items = [],
        figureEl,
        linkEl,
        size,
        item;

      for(var i = 0; i < numNodes; i++) {

        figureEl = thumbElements[i]; // <figure> element

        // include only element nodes
        if(figureEl.nodeType !== 1) {
          continue;
        }

        linkEl = figureEl.children[0]; // <a> element

        size = linkEl.getAttribute('data-size').split('x');

        // create slide object
        item = {
          src: linkEl.getAttribute('href'),
          w: parseInt(size[0], 10),
          h: parseInt(size[1], 10)
        };



        if(figureEl.children.length > 1) {
          // <figcaption> content
          item.title = figureEl.children[1].innerHTML;
        }

        if(linkEl.children.length > 0) {
          // <img> thumbnail element, retrieving thumbnail url
          item.msrc = linkEl.children[0].getAttribute('src');
        }

        item.el = figureEl; // save link to element for getThumbBoundsFn
        items.push(item);
      }

      return items;
    };

    // find nearest parent element
    var closest = function closest(el, fn) {
      return el && ( fn(el) ? el : closest(el.parentNode, fn) );
    };

    // triggers when user clicks on thumbnail
    var onThumbnailsClick = function(e) {
      e = e || window.event;
      e.preventDefault ? e.preventDefault() : e.returnValue = false;

      var eTarget = e.target || e.srcElement;

      // find root element of slide
      var clickedListItem = closest(eTarget, function(el) {
        return (el.tagName && el.tagName.toUpperCase() === 'FIGURE');
      });

      if(!clickedListItem) {
        return;
      }

      // find index of clicked item by looping through all child nodes
      // alternatively, you may define index via data- attribute
      var clickedGallery = clickedListItem.parentNode,
        childNodes = clickedListItem.parentNode.childNodes,
        numChildNodes = childNodes.length,
        nodeIndex = 0,
        index;

      for (var i = 0; i < numChildNodes; i++) {
        if(childNodes[i].nodeType !== 1) {
          continue;
        }

        if(childNodes[i] === clickedListItem) {
          index = nodeIndex;
          break;
        }
        nodeIndex++;
      }



      if(index >= 0) {
        // open PhotoSwipe if valid index found
        openPhotoSwipe( index, clickedGallery );
      }
      return false;
    };

    // parse picture index and gallery index from URL (#&pid=1&gid=2)
    var photoswipeParseHash = function() {
      var hash = window.location.hash.substring(1),
        params = {};

      if(hash.length < 5) {
        return params;
      }

      var vars = hash.split('&');
      for (var i = 0; i < vars.length; i++) {
        if(!vars[i]) {
          continue;
        }
        var pair = vars[i].split('=');
        if(pair.length < 2) {
          continue;
        }
        params[pair[0]] = pair[1];
      }

      if(params.gid) {
        params.gid = parseInt(params.gid, 10);
      }

      return params;
    };

    var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
      var pswpElement = document.querySelectorAll('.pswp')[0],
        gallery,
        options,
        items;

      items = parseThumbnailElements(galleryElement);
      // define options (if needed)
      options = {

        // define gallery index (for URL)
        galleryUID: galleryElement.getAttribute('data-pswp-uid'),

        getThumbBoundsFn: function(index) {
          console.log(items[index])
          // See Options -> getThumbBoundsFn section of documentation for more info
          var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail
            pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
            rect = thumbnail.getBoundingClientRect();

          return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
        }

      };

      // PhotoSwipe opened from URL
      if(fromURL) {
        if(options.galleryPIDs) {
          // parse real index when custom PIDs are used
          // http://photoswipe.com/documentation/faq.html#custom-pid-in-url
          for(var j = 0; j < items.length; j++) {
            if(items[j].pid == index) {
              options.index = j;
              break;
            }
          }
        } else {
          // in URL indexes start from 1
          options.index = parseInt(index, 10) - 1;
        }
      } else {
        options.index = parseInt(index, 10);
      }

      // exit if index not found
      if( isNaN(options.index) ) {
        return;
      }

      if(disableAnimation) {
        options.showAnimationDuration = 0;
      }

      // Pass data to PhotoSwipe and initialize it
      gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
      gallery.init();
    };

    // loop through all gallery elements and bind events
    var galleryElements = document.querySelectorAll( gallerySelector );

    for(var i = 0, l = galleryElements.length; i < l; i++) {
      galleryElements[i].setAttribute('data-pswp-uid', i+1);
      galleryElements[i].onclick = onThumbnailsClick;
    }

    // Parse URL and open gallery if it contains #&pid=3&gid=1
    var hashData = photoswipeParseHash();
    if(hashData.pid && hashData.gid) {
      openPhotoSwipe( hashData.pid ,  galleryElements[ hashData.gid - 1 ], true, true );
    }
  }

  get_storage(name) {
    return JSON.parse(localStorage.getItem(name))
  }

  set_storage(name, value) {
    localStorage.setItem(name, JSON.stringify(value))
  }
}

var {
  footer, query,
  item, pHeader,
  initPhotoSwipeFromDOM, get_storage,
  set_storage
} = new Utils();