<template>
  <el-breadcrumb class="app-breadcrumb" separator-class="el-icon-arrow-right">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item,index) in levelList" :key="item.path">
        <span v-if="item.redirect==='noRedirect'||index==levelList.length-1" class="no-redirect">
          <!-- {{ item.meta.title }} -->
            {{ item.meta.i18n ? $t(item.meta.i18n) : item.meta.title }}
        </span>
        <span v-else-if="item.name === 'TrialsPanel'" class="no-redirect">
          <!-- {{ item.meta.title }} -->
          {{ item.meta.i18n ? $t(item.meta.i18n) : item.meta.title }}
        </span>
        <a v-else @click.prevent="handleLink(item)">
          {{ item.meta.i18n ? $t(item.meta.i18n) : item.meta.title }}
        </a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
import pathToRegexp from 'path-to-regexp'

export default {
  data() {
    return {
      levelList: null
    }
  },
  watch: {
    $route() {
      this.getBreadcrumb()
    }
  },
  created() {
    this.getBreadcrumb()
  },
  methods: {
    getBreadcrumb() {
      const matched = this.$route.matched.filter(item => item.meta && item.meta.title)
      matched.map(item => {
        if (item.name === 'TrialsPanel') {
          item.meta.title = this.$route.query.trialCode // 暂时处理
        }
      })
      
      this.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
    },
    isDashboard(route) {
      const name = route && route.name
      if (!name) {
        return false
      }
      return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
    },
    pathCompile(path) {
      const { params } = this.$route
      var toPath = pathToRegexp.compile(path)
      return toPath(params)
    },
    handleLink(item) {
      const { redirect, path } = item
      if (redirect) {
        this.$router.push(redirect)
        return
      }
      this.$router.push(this.pathCompile(path))
    }
  }
}
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 14px;
  line-height: 50px;
  margin-left: 8px;

  .no-redirect {
    color: #97a8be;
    cursor: text;
  }
}
</style>
