<template>
  <div class="avue-tags"
       v-if="showTag">
    <!-- tag盒子 -->
    <div v-if="contextmenuFlag"
         class="avue-tags__contentmenu"
         :style="{left:contentmenuX+'px',top:contentmenuY+'px'}">
      <div class="item"
           @click="clearCacheTags">{{$t('tagsView.clearCache')}}
      </div>
      <div class="item"
           @click="closeOthersTags">{{$t('tagsView.closeOthers')}}
      </div>
      <div class="item"
           @click="closeAllTags">{{$t('tagsView.closeAll')}}
      </div>
    </div>
    <div class="avue-tags__box"
         :class="{'avue-tags__box--close':!website.isFirstPage}">
      <el-tabs v-model="active"
               type="card"
               @contextmenu.native="handleContextmenu"
               :closable="tagLen!==1"
               @tab-click="openTag"
               @edit="menuTag">
        <el-tab-pane :key="item.value"
                     v-for="item in tagList"
                     :label="generateTitle(item)"
                     :name="item.value">
        </el-tab-pane>

      </el-tabs>
      <el-dropdown class="avue-tags__menu">
        <el-button type="primary"
                   size="mini">
          {{$t('tagsView.menu')}}
          <i class="el-icon-arrow-down el-icon--right"></i>
        </el-button>
        <el-dropdown-menu slot="dropdown">
          <el-dropdown-item @click.native="$parent.isSearch=true">{{$t('tagsView.search')}}</el-dropdown-item>
          <el-dropdown-item @click.native="closeOthersTags">{{$t('tagsView.closeOthers')}}</el-dropdown-item>
          <el-dropdown-item @click.native="closeAllTags">{{$t('tagsView.closeAll')}}</el-dropdown-item>
          <el-dropdown-item @click.native="clearCacheTags">{{$t('tagsView.clearCache')}}</el-dropdown-item>
        </el-dropdown-menu>
      </el-dropdown>
    </div>

  </div>
</template>
<script>
  import {mapGetters, mapState} from "vuex";
  import {clearCache} from "@/api/user";

  export default {
    name: "tags",
    data() {
      return {
        active: "",
        contentmenuX: "",
        contentmenuY: "",
        contextmenuFlag: false
      };
    },
    created() {
    },
    mounted() {
      this.setActive();
    },
    watch: {
      tag() {
        this.setActive();
      },
      contextmenuFlag() {
        window.addEventListener("mousedown", this.watchContextmenu);
      }
    },
    computed: {
      ...mapGetters(["tagWel", "tagList", "tag", "website"]),
      ...mapState({
        showTag: state => state.common.showTag
      }),
      tagLen() {
        return this.tagList.length || 0;
      }
    },
    methods: {
      generateTitle(item) {
        return this.$router.$avueRouter.generateTitle(
          item.label,
          (item.meta || {}).i18n
        );
      },
      watchContextmenu(event) {
        if (!this.$el.contains(event.target) || event.button !== 0) {
          this.contextmenuFlag = false;
        }
        window.removeEventListener("mousedown", this.watchContextmenu);
      },
      handleContextmenu(event) {
        let target = event.target;
        // 解决 https://github.com/d2-projects/d2-admin/issues/54
        let flag = false;
        if (target.className.indexOf("el-tabs__item") > -1) flag = true;
        else if (target.parentNode.className.indexOf("el-tabs__item") > -1) {
          target = target.parentNode;
          flag = true;
        }
        if (flag) {
          event.preventDefault();
          event.stopPropagation();
          this.contentmenuX = event.clientX;
          this.contentmenuY = event.clientY;
          this.tagName = target.getAttribute("aria-controls").slice(5);
          this.contextmenuFlag = true;
        }
      },
      //激活当前选项
      setActive() {
        this.active = this.tag.value;
      },
      menuTag(value, action) {
        if (action === "remove") {
          let {tag, key} = this.findTag(value);
          this.$store.commit("DEL_TAG", tag);
          if (tag.value === this.tag.value) {
            tag = this.tagList[key === 0 ? key : key - 1]; //如果关闭本标签让前推一个
            this.openTag(tag);
          }
        }
      },
      openTag(item) {
        let tag;
        if (item.name) {
          tag = this.findTag(item.name).tag;
        } else {
          tag = item;
        }
        this.$router.push({
          path: this.$router.$avueRouter.getPath({
            name: tag.label,
            src: tag.value
          }, tag.meta),
          query: tag.query
        });
      },
      closeOthersTags() {
        this.contextmenuFlag = false;
        this.$store.commit("DEL_TAG_OTHER");
      },
      findTag(value) {
        let tag, key;
        this.tagList.map((item, index) => {
          if (item.value === value) {
            tag = item;
            key = index;
          }
        });
        return {tag: tag, key: key};
      },
      closeAllTags() {
        this.contextmenuFlag = false;
        this.$store.commit("DEL_ALL_TAG");
        this.$router.push({
          path: this.$router.$avueRouter.getPath({
            src: this.tagWel.value
          }),
          query: this.tagWel.query
        });
      },
      clearCacheTags() {
        this.$confirm("是否需要清除缓存?", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }).then(() => {
          clearCache().then(() => {
            this.contextmenuFlag = false;
            this.$message.success('清除完毕');
          })
        });
      }
    }
  };
</script>


