<template>
  <ElDialog v-model="showDialog"
    :close-on-click-modal="false"
    destroy-on-close
    width="25vw"
  >
    <ElForm :model="menuForm"
      class="menu-form"
      label-width="auto">
      <ElFormItem label="上级">
        <ElTreeSelect
          v-model="menuForm.pid"
          :data="menuTreeDataSource"
          :default-expanded-keys="['0']"
          :disabled="status === 'view'"
          :render-after-expand="false"
          check-strictly
          placeholder="选择上级菜单"
        />
      </ElFormItem>
      <ElFormItem label="类型">
        <ElSelect
          v-model="menuForm.menuCategory"
          :data="menuCategoryData"
          :disabled="status === 'view'"
          placeholder="选择类型"
        >
          <ElOption v-for="menuCategory in menuCategoryData" :key="menuCategory.key" :label="menuCategory.label" :value="menuCategory.key"/>
        </ElSelect>
      </ElFormItem>

      <ElFormItem label="名称">
        <ElInput
          v-model="menuForm.title"
          :disabled="status === 'view'"
          placeholder="名称"
        />
      </ElFormItem>

      <ElFormItem
        v-if="menuForm.menuCategory === MenuCategory.Page || menuForm.menuCategory === MenuCategory.SubPage"
        :disabled="status === 'view'"
        label="路由名称">
        <ElInput v-model="menuForm.routeName" :min="0" placeholder="路由名称"/>
      </ElFormItem>
      <ElFormItem
        v-if="menuForm.menuCategory === MenuCategory.Page || menuForm.menuCategory === MenuCategory.SubPage"
        :disabled="status === 'view'"
        label="路由地址">
        <ElInput v-model="menuForm.routePath" :min="0" placeholder="路由地址"/>
      </ElFormItem>
      <ElFormItem

        label="编码">
        <ElInput v-model="menuForm.sn"
          :disabled="status === 'view'"
          :min="0" placeholder="编码"/>
      </ElFormItem>
      <ElFormItem

        label="图标">
        <ElDropdown closable header="图标列表"
          placement="bottom"
          style="width: 100%" trigger="click">
          <ElInput v-model="menuForm.icon"
            :disabled="status === 'view'"
            placeholder="选择图标"/>
          <template #dropdown>
            <ElTable
              :data="iconTableDataSource"
              empty-text="暂无数据"
              style="width: 324px;"
            >
              <ElTableColumn label="图标" prop="name"/>
              <ElTableColumn label="名称" prop="name"/>
            </ElTable>
          </template>
        </ElDropdown>
      </ElFormItem>
      <ElFormItem label="排序">
        <ElInputNumber
          v-model="menuForm.sort"
          :disabled="status === 'view'"
          :min="0"
          placeholder="排序"
          style="width: 100%"
        />
      </ElFormItem>

    </ElForm>
    <template #footer>
      <ElButton @click="showDialog = false">{{ status === 'view' ? '关闭' : '取消' }}</ElButton>
      <ElButton v-if="status !== 'view'" :loading="submiting" type="primary" @click="submitHandler">提交</ElButton>
    </template>
  </ElDialog>
</template>

<script lang="ts" setup>
import { ref } from 'vue'
import {
  MenuCategory,
  MenuCategoryDict,
} from '@/common/app/constants.ts'
import MenuApi from '@/pages/sys/menus/menu-api.ts'
import Colls from '@/common/utils/colls.ts'
import Strings from '@/common/utils/strings.ts'
import { ElMessage } from 'element-plus'

interface IconData {
  name: string
}

const selectedRowKeys = ref<string[]>([])

const iconTableDataSource = ref<IconData[]>([].filter((_, i) => {
  return i >= 0 && i < 5
}))

const showDialog = ref(false)
const submiting = ref(false)
const status = ref<'add' | 'view' | 'modify'>('add')

const pagination = reactive({
  pageIndex: 1,
  pageSize: 5,
  total: 20,
  size: 'sm',
  showTotal: true,
  onChange(pageIndex: number, pageSize: number) {
    pagination.pageIndex = pageIndex
    pagination.pageSize = pageSize
    iconTableDataSource.value = [].filter((_, i) => {
      return i >= (pageIndex - 1) * pageSize && i < pageIndex * pageSize
    })
  },
})

const menuForm = reactive<MenuTypes.MenuForm>({})

const menuCategoryData = computed(() => {
  const data: { key: string, label: string }[] = []
  for (const key in MenuCategoryDict) {
    data.push({
      key,
      label: MenuCategoryDict[key as keyof typeof MenuCategoryDict],
    })
  }
  return data
})

const menuTreeDataSource = ref<MenuTypes.SysMenu[]>()

function submitHandler() {
  if (status.value === 'view') return
  submiting.value = true
  if (menuForm.id != null) {
    MenuApi.modify(menuForm)
      .then(() => {
        ElMessage.success('修改成功')
      })
      .finally(() => {
        submiting.value = false
      })
  } else {
    MenuApi.add(menuForm)
      .then(() => {
        ElMessage.success('添加成功')
      })
      .finally(() => {
        submiting.value = false
      })
  }
}

defineExpose({
  open(data: MenuTypes.MenuForm = {}) {
    if (!Strings.isBlank(data.id)) {
      status.value = 'modify'
    }
    Object.assign(menuForm, data)
    showDialog.value = true
    if (data.icon != null) {
      selectedRowKeys.value = [ data.icon ]
    }
  }
})

onMounted(() => {
  MenuApi.list()
    .then(({data}) => {
      const nodes = Colls.toTree(data.map(it => ({value: it.id, label: it.title, ...it})))
      menuTreeDataSource.value = [ {value: '0', label: '顶级菜单', id: '0', pid: '0', children: nodes} ]
    })
})

</script>

<style lang="stylus" scoped>
.menu-form {
  padding 20px
}
</style>
