<template>
  <Dialog :title="dialogTitle" v-model="dialogVisible" width="80%">
    <el-form
      ref="formRef"
      :model="formData"
      :rules="formRules"
      label-width="80px"
      v-loading="formLoading"
    >
      <el-form-item label="模板名称" prop="name">
        <el-input v-model="formData.name" placeholder="请输入模板名称" />
      </el-form-item>
      <el-form-item label="计费方式" prop="chargeMode">
        <el-radio-group v-model="formData.chargeMode" @change="changeChargeMode">
          <el-radio
            v-for="dict in getIntDictOptions(DICT_TYPE.EXPRESS_CHARGE_MODE)"
            :key="dict.value"
            :label="dict.value"
          >
            {{ dict.label }}
          </el-radio>
        </el-radio-group>
      </el-form-item>
      <el-form-item label="运费" prop="templateCharge">
        <el-table border style="width: 100%" :data="formData.templateCharge">
          <el-table-column align="center" label="区域" width="180">
            <template #default="{ row }">
              <!--   区域数据太多，用赖加载方式，要不然性能有问题 -->
              <el-tree-select
                v-model="row.areaIds"
                :load="loadChargeArea"
                :props="defaultProps"
                node-key="id"
                multiple
                check-strictly
                show-checkbox
                lazy
                check-on-click-node
                :render-after-expand="false"
                :cache-data="areaCache"
              />
            </template>
          </el-table-column>
          <el-table-column
            align="center"
            :label="columnTitle.startCountTitle"
            width="180"
            prop="startCount"
          >
            <template #default="{ row }">
              <el-input-number v-model="row.startCount" :min="1" />
            </template>
          </el-table-column>
          <el-table-column width="180" align="center" label="运费(元)" prop="startPrice">
            <template #default="{ row }">
              <el-input-number v-model="row.startPrice" :min="1" />
            </template>
          </el-table-column>
          <el-table-column
            width="180"
            align="center"
            :label="columnTitle.extraCountTitle"
            prop="extraCount"
          >
            <template #default="{ row }">
              <el-input-number v-model="row.extraCount" :min="1" />
            </template>
          </el-table-column>
          <el-table-column width="180" align="center" label="续费(元)" prop="extraPrice">
            <template #default="{ row }">
              <el-input-number v-model="row.extraPrice" :min="1" />
            </template>
          </el-table-column>
          <el-table-column label="操作" align="center">
            <template #default="scope">
              <el-button link type="danger" @click="deleteChargeArea(scope.$index)">
                删除
              </el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" plain @click="addChargeArea()">
          <Icon icon="ep:plus" class="mr-5px" /> 添加区域
        </el-button>
      </el-form-item>
      <el-form-item label="包邮区域" prop="templateFree">
        <el-table border style="width: 100%" :data="formData.templateFree">
          <el-table-column align="center" label="区域">
            <template #default="{ row }">
              <!-- 区域数据太多，用赖加载方式，要不然性能有问题 -->
              <el-tree-select
                v-model="row.areaIds"
                multiple
                lazy
                :load="loadFreeArea"
                :props="defaultProps"
                node-key="id"
                check-strictly
                show-checkbox
                check-on-click-node
                :render-after-expand="true"
                :cache-data="areaCache"
              />
            </template>
          </el-table-column>
          <el-table-column align="center" :label="columnTitle.freeCountTitle" prop="freeCount">
            <template #default="{ row }">
              <el-input-number v-model="row.freeCount" :min="1" />
            </template>
          </el-table-column>
          <el-table-column align="center" label="包邮金额（元）" prop="freePrice">
            <template #default="{ row }">
              <el-input-number v-model="row.freePrice" :min="1" />
            </template>
          </el-table-column>
          <el-table-column label="操作" align="center">
            <template #default="scope">
              <el-button link type="danger" @click="deleteFreeArea(scope.$index)"> 删除 </el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" plain @click="addFreeArea()">
          <Icon icon="ep:plus" class="mr-5px" /> 添加区域
        </el-button>
      </el-form-item>
      <el-form-item label="排序" prop="sort">
        <el-input-number v-model="formData.sort" controls-position="right" :min="0" />
      </el-form-item>
    </el-form>
    <template #footer>
      <el-button @click="submitForm" type="primary" :disabled="formLoading">确 定</el-button>
      <el-button @click="dialogVisible = false">取 消</el-button>
    </template>
  </Dialog>
</template>
<script lang="ts" setup>
import { DICT_TYPE, getIntDictOptions } from '@/utils/dict'
import * as DeliveryExpressTemplateApi from '@/api/mall/trade/delivery/expressTemplate'
import { defaultProps } from '@/utils/tree'
import { yuanToFen, fenToYuan } from '@/utils'
import { getChildrenArea, getAreaListByIds } from '@/api/system/area'
import { cloneDeep } from 'lodash-es'
const { t } = useI18n() // 国际化
const message = useMessage() // 消息弹窗

const dialogVisible = ref(false) // 弹窗的是否展示
const dialogTitle = ref('') // 弹窗的标题
const formLoading = ref(false) // 表单的加载中：1）修改时的数据加载；2）提交的按钮禁用
const formType = ref('') // 表单的类型：create - 新增；update - 修改
const formData = ref({
  id: undefined,
  name: '',
  chargeMode: 1,
  sort: 0,
  templateCharge: [],
  templateFree: []
})
const columnTitleMap = new Map()
const columnTitle = ref({
  startCountTitle: '首件',
  extraCountTitle: '续件',
  freeCountTitle: '包邮件数'
})
const formRules = reactive({
  name: [{ required: true, message: '模板名称不能为空', trigger: 'blur' }],
  chargeMode: [{ required: true, message: '配送计费方式不能为空', trigger: 'blur' }],
  sort: [{ required: true, message: '分类排序不能为空', trigger: 'blur' }]
})
const formRef = ref() // 表单 Ref
const areaCache = ref([]) // 由于区域节点懒加载，已选区域节点需要缓存展示
// TODO @jason：配送的时候，只允许选择省市级别，不允许选择区；如果这样的话，是不是打开弹窗，直接把城市都请求过来；
// TODO @jaosn：因为只有省市两级，感觉就不用特殊做全国逻辑；选择全国，就默认把子节点都选择上；另外，选择父节点，要把子节点选中哈；

/** 打开弹窗 */
const open = async (type: string, id?: number) => {
  dialogVisible.value = true
  dialogTitle.value = t('action.' + type)
  formType.value = type
  resetForm()
  try {
    // 修改时，设置数据
    if (id) {
      formLoading.value = true
      formData.value = await DeliveryExpressTemplateApi.getDeliveryExpressTemplate(id)
      columnTitle.value = columnTitleMap.get(formData.value.chargeMode)
      const chargeAreaIds = []
      const freeAreaIds = []
      formData.value.templateCharge.forEach((item) => {
        for (let i = 0; i < item.areaIds.length; i++) {
          if (!chargeAreaIds.includes(item.areaIds[i])) {
            chargeAreaIds.push(item.areaIds[i])
          }
        }
        //前端价格以元展示
        item.startPrice = fenToYuan(item.startPrice)
        item.extraPrice = fenToYuan(item.extraPrice)
      })
      formData.value.templateFree.forEach((item) => {
        for (let i = 0; i < item.areaIds.length; i++) {
          if (!chargeAreaIds.includes(item.areaIds[i]) && !freeAreaIds.includes(item.areaIds[i])) {
            freeAreaIds.push(item.areaIds[i])
          }
        }
        item.freePrice = fenToYuan(item.freePrice)
      })
      // 已选的区域节点
      const areaIds = chargeAreaIds.concat(freeAreaIds)
      // 区域节点，懒加载方式。已选节点需要缓存展示
      areaCache.value = await getAreaListByIds(areaIds.join(','))
    }
  } finally {
    formLoading.value = false
  }
}
defineExpose({ open }) // 提供 open 方法，用于打开弹窗

/** 提交表单 */
const emit = defineEmits(['success']) // 定义 success 事件，用于操作成功后的回调
const submitForm = async () => {
  // 校验表单
  if (!formRef) return
  const valid = await formRef.value.validate()
  if (!valid) return
  // 提交请求
  formLoading.value = true
  try {
    const data = formData.value as DeliveryExpressTemplateApi.DeliveryExpressTemplateVO
    // 前端价格以元展示，提交到后端。用分计算
    // TODO @jason：不能直接这样改，要复制出来改。不然后端操作失败，数据已经被改了
    data.templateCharge.forEach((item) => {
      item.startPrice = yuanToFen(item.startPrice)
      item.extraPrice = yuanToFen(item.extraPrice)
    })
    data.templateFree.forEach((item) => {
      item.freePrice = yuanToFen(item.freePrice)
    })
    if (formType.value === 'create') {
      await DeliveryExpressTemplateApi.createDeliveryExpressTemplate(data)
      message.success(t('common.createSuccess'))
    } else {
      await DeliveryExpressTemplateApi.updateDeliveryExpressTemplate(data)
      message.success(t('common.updateSuccess'))
    }
    dialogVisible.value = false
    // 发送操作成功的事件
    emit('success')
  } finally {
    formLoading.value = false
  }
}

/** 重置表单 */
const resetForm = () => {
  formData.value = {
    id: undefined,
    name: '',
    chargeMode: 1,
    templateCharge: [
      {
        areaIds: [1],
        startCount: 2,
        startPrice: 5,
        extraCount: 5,
        extraPrice: 10
      }
    ],
    templateFree: [],
    sort: 0
  }
  columnTitle.value = columnTitleMap.get(1)
  formRef.value?.resetFields()
}

/** 配送计费方法改变 */
const changeChargeMode = (chargeMode: number) => {
  columnTitle.value = columnTitleMap.get(chargeMode)
}
const defaultArea = [{ id: 1, name: '全国', disabled: false }]

/** 初始化数据 */
// TODO @jason：是不是不用写这样一个初始化方法，columnTitleMap 直接就可以了呀
// const columnTitleMap = {
//   '1': {
//     startCountTitle: '首件',
//     extraCountTitle: '续件',
//     freeCountTitle: '包邮件数'
//   },
//   '2': {
//     startCountTitle: '首件重量(kg)',
//     extraCountTitle: '续件重量(kg)',
//     freeCountTitle: '包邮重量(kg)'
//   },
//   '3': {
//     startCountTitle: '首件体积(m³)',
//     extraCountTitle: '续件体积(m³)',
//     freeCountTitle: '包邮体积(m³)'
//   }
// }
const initData = async () => {
  // TODO 从服务端全量加载数据， 后面看懒加载是不是可以从前端获取数据。 目前从后端获取数据
  // formLoading.value = true
  // try {
  //   const data = await getAreaTree()
  //   areaTree = data
  //   console.log('areaTree', areaTree)
  // } finally {
  //   formLoading.value = false
  // }
  // 表头标题和计费方式的映射
  columnTitleMap.set(1, {
    startCountTitle: '首件',
    extraCountTitle: '续件',
    freeCountTitle: '包邮件数'
  })
  columnTitleMap.set(2, {
    startCountTitle: '首件重量(kg)',
    extraCountTitle: '续件重量(kg)',
    freeCountTitle: '包邮重量(kg)'
  })
  columnTitleMap.set(3, {
    startCountTitle: '首件体积(m³)',
    extraCountTitle: '续件体积(m³)',
    freeCountTitle: '包邮体积(m³)'
  })
}

/** 懒加载运费区域树 */
const loadChargeArea = async (node, resolve) => {
  //已选区域需要禁止再次选择
  const areaIds = []
  formData.value.templateCharge.forEach((item) => {
    if (item.areaIds.length > 0) {
      item.areaIds.forEach((areaId) => areaIds.push(areaId))
    }
  })
  if (node.isLeaf) return resolve([])
  const length = node.data.length
  if (length === 0) {
    const data = cloneDeep(defaultArea)
    const item = data[0]
    if (areaIds.includes(item.id)) {
      // TODO 禁止选中的区域有些问题， 导致修改时候不能重新选择 不知道如何处理。 暂时注释掉 @芋艿 有空瞅瞅
      // TODO @jason：先不做这个功能哈。
      //item.disabled = true
    }
    resolve(data)
  } else {
    const id = node.data.id
    const data = await getChildrenArea(id)
    data.forEach((item) => {
      if (areaIds.includes(item.id)) {
        //item.disabled = true
      }
    })
    resolve(data)
  }
}

/** 懒加载包邮区域树 */
const loadFreeArea = async (node, resolve) => {
  if (node.isLeaf) return resolve([])
  //已选区域需要禁止再次选择
  const areaIds = []
  formData.value.templateFree.forEach((item) => {
    if (item.areaIds.length > 0) {
      item.areaIds.forEach((areaId) => areaIds.push(areaId))
    }
  })
  const length = node.data.length
  if (length === 0) {
    // 为空，从全国开始选择。全国 id == 1
    const data = cloneDeep(defaultArea)
    const item = data[0]
    if (areaIds.includes(item.id)) {
      //item.disabled = true
    }
    resolve(data)
  } else {
    const id = node.data.id
    const data = await getChildrenArea(id)
    // 已选区域需要禁止再次选择
    data.forEach((item) => {
      if (areaIds.includes(item.id)) {
        // TODO 禁止选中的区域有些问题， 导致修改时候不能重新选择 不知道如何处理。 暂时注释掉 @芋艿 有空瞅瞅
        // TODO @jason：先不做这个功能哈。
        //item.disabled = true
      }
    })
    resolve(data)
  }
}
/** 添加计费区域 */
const addChargeArea = () => {
  const data = formData.value
  data.templateCharge.push({
    areaIds: [],
    startCount: 1,
    startPrice: 1,
    extraCount: 1,
    extraPrice: 1
  })
}

/** 删除计费区域 */
const deleteChargeArea = (index) => {
  const data = formData.value
  data.templateCharge.splice(index, 1)
}

/** 添加包邮区域 */
const addFreeArea = () => {
  const data = formData.value
  data.templateFree.push({
    areaIds: [],
    freeCount: 1,
    freePrice: 1
  })
}

/** 删除包邮区域 */
const deleteFreeArea = (index) => {
  const data = formData.value
  data.templateFree.splice(index, 1)
}

/** 初始化 **/
onMounted(() => {
  initData()
})
</script>
