<template>
  <el-form size="small">
    <el-form-item>
      <el-radio v-model="radioValue" :label="1">
        不填，允许的通配符[, - * /]
      </el-radio>
    </el-form-item>

    <el-form-item>
      <el-radio v-model="radioValue" :label="2">
        每年
      </el-radio>
    </el-form-item>

    <el-form-item>
      <el-radio v-model="radioValue" :label="3">
        周期从
        <el-input-number v-model="cycle01" :max="2098" :min="fullYear"/>
        -
        <el-input-number v-model="cycle02" :max="2099" :min="cycle01 ? cycle01 + 1 : fullYear + 1"/>
      </el-radio>
    </el-form-item>

    <el-form-item>
      <el-radio v-model="radioValue" :label="4">
        从
        <el-input-number v-model="average01" :max="2098" :min="fullYear"/>
        年开始，每
        <el-input-number v-model="average02" :max="2099 - average01 || fullYear" :min="1"/>
        年执行一次
      </el-radio>

    </el-form-item>

    <el-form-item>
      <el-radio v-model="radioValue" :label="5">
        指定
        <el-select v-model="checkboxList" clearable multiple placeholder="可多选">
          <el-option v-for="item in 9" :key="item" :label="item -1 + fullYear" :value="item - 1 + fullYear"/>
        </el-select>
      </el-radio>
    </el-form-item>
  </el-form>
</template>

<script>
export default {
  data() {
    return {
      fullYear: 0,
      radioValue: 1,
      cycle01: 0,
      cycle02: 0,
      average01: 0,
      average02: 1,
      checkboxList: [],
      checkNum: this.$options.propsData.check
    }
  },
  name: 'crontab-year',
  props: ['check', 'month', 'cron'],
  methods: {
    // 单选按钮值变化时
    radioChange() {
      switch (this.radioValue) {
        case 1:
          this.$emit('update', 'year', '')
          break
        case 2:
          this.$emit('update', 'year', '*')
          break
        case 3:
          this.$emit('update', 'year', this.cycleTotal)
          break
        case 4:
          this.$emit('update', 'year', this.averageTotal)
          break
        case 5:
          this.$emit('update', 'year', this.checkboxString)
          break
      }
    },
    // 周期两个值变化时
    cycleChange() {
      if (this.radioValue == '3') {
        this.$emit('update', 'year', this.cycleTotal)
      }
    },
    // 平均两个值变化时
    averageChange() {
      if (this.radioValue == '4') {
        this.$emit('update', 'year', this.averageTotal)
      }
    },
    // checkbox值变化时
    checkboxChange() {
      if (this.radioValue == '5') {
        this.$emit('update', 'year', this.checkboxString)
      }
    }
  },
  watch: {
    'radioValue': 'radioChange',
    'cycleTotal': 'cycleChange',
    'averageTotal': 'averageChange',
    'checkboxString': 'checkboxChange'
  },
  computed: {
    // 计算两个周期值
    cycleTotal: function() {
      const cycle01 = this.checkNum(this.cycle01, this.fullYear, 2098)
      const cycle02 = this.checkNum(this.cycle02, cycle01 ? cycle01 + 1 : this.fullYear + 1, 2099)
      return cycle01 + '-' + cycle02
    },
    // 计算平均用到的值
    averageTotal: function() {
      const average01 = this.checkNum(this.average01, this.fullYear, 2098)
      const average02 = this.checkNum(this.average02, 1, 2099 - average01 || this.fullYear)
      return average01 + '/' + average02
    },
    // 计算勾选的checkbox值合集
    checkboxString: function() {
      let str = this.checkboxList.join()
      return str
    }
  },
  mounted: function() {
    // 仅获取当前年份
    this.fullYear = Number(new Date().getFullYear())
    this.cycle01 = this.fullYear
    this.average01 = this.fullYear
  }
}
</script>
