<template>
  <div class="NCC-common-layout">
    <div class="NCC-common-layout-center">
      <!-- 筛选条件 -->
      <el-row class="NCC-common-search-box" :gutter="16">
        <el-form @submit.native.prevent>
          <!-- <el-col :span="6">
            <el-form-item label="门店">
              <el-select v-model="query.storeId" placeholder="请选择门店" clearable filterable>
                <el-option v-for="store in storeOptions" :key="store.id" :label="store.dm" :value="store.id" />
              </el-select>
            </el-form-item>
          </el-col> -->
          <el-col :span="6">
            <el-form-item label="开始时间">
              <el-date-picker 
                v-model="query.startTime" 
                type="datetime" 
                value-format="yyyy-MM-dd HH:mm:ss" 
                format="yyyy-MM-dd HH:mm:ss" 
                placeholder="开始时间"
              />
            </el-form-item>
          </el-col>
          <el-col :span="6">
            <el-form-item label="结束时间">
              <el-date-picker 
                v-model="query.endTime" 
                type="datetime" 
                value-format="yyyy-MM-dd HH:mm:ss" 
                format="yyyy-MM-dd HH:mm:ss" 
                placeholder="结束时间"
              />
            </el-form-item>
          </el-col>
          <el-col :span="6">
            <el-form-item label="品项">
              <el-select
                v-model="query.itemId"
                placeholder="请选择品项"
                clearable
                filterable
                :style='{"width":"100%"}'>
                <el-option
                  v-for="item in itemOptions"
                  :key="item.id"
                  :label="item.xmmc"
                  :value="item.id">
                </el-option>
              </el-select>
            </el-form-item>
          </el-col>
          <el-col :span="6">
            <el-form-item label="品项分类">
              <el-select
                v-model="query.itemCategory"
                placeholder="请选择品项分类"
                clearable
                filterable
                :style='{"width":"100%"}'>
                <el-option
                  v-for="item in itemCategoryOptions"
                  :key="item.value"
                  :label="item.label"
                  :value="item.value">
                </el-option>
              </el-select>
            </el-form-item>
          </el-col>
          <el-col :span="6">
            <el-form-item>
              <el-button type="primary" icon="el-icon-search" @click="search()">查询</el-button>
              <el-button icon="el-icon-refresh-right" @click="reset()">重置</el-button>
              <el-button icon="el-icon-setting" @click="showColumnDialog = true">字段设置</el-button>
            </el-form-item>
          </el-col>
        </el-form>
      </el-row>

      <!-- 统计卡片 -->
      <div class="statistics-cards" v-if="summaryData">
        <el-row :gutter="16">
          <el-col :span="6">
            <div class="statistics-card">
              <div class="card-icon">
                <i class="el-icon-goods"></i>
              </div>
              <div class="card-content">
                <div class="card-title">品项总数</div>
                <div class="card-value">{{ summaryData.totalItems || 0 }}</div>
              </div>
            </div>
          </el-col>
          <el-col :span="6">
            <div class="statistics-card">
              <div class="card-icon">
                <i class="el-icon-money"></i>
              </div>
              <div class="card-content">
                <div class="card-title">开单金额合计</div>
                <div class="card-value">¥{{ formatMoney(summaryData.totalBillingAmount) }}</div>
              </div>
            </div>
          </el-col>
          <el-col :span="6">
            <div class="statistics-card">
              <div class="card-icon">
                <i class="el-icon-user"></i>
              </div>
              <div class="card-content">
                <div class="card-title">购买人次</div>
                <div class="card-value">{{ summaryData.totalBuyers || 0 }}</div>
              </div>
            </div>
          </el-col>
          <el-col :span="6">
            <div class="statistics-card">
              <div class="card-icon">
                <i class="el-icon-delete"></i>
              </div>
              <div class="card-content">
                <div class="card-title">退款金额</div>
                <div class="card-value">¥{{ formatMoney(summaryData.totalRefundAmount) }}</div>
              </div>
            </div>
          </el-col>
        </el-row>
      </div>

      <!-- 数据表格 -->
      <div class="NCC-common-layout-main NCC-flex-main table-wrapper">
        <el-table 
          v-loading="listLoading" 
          :data="list" 
          border
          class="NCC-common-table"
          :height="tableHeight"
          @sort-change="handleSortChange">
          <el-table-column 
            v-for="col in visibleColumns" 
            :key="col.prop"
            :prop="col.prop" 
            :label="col.label" 
            :width="col.width"
            :min-width="col.minWidth"
            :sortable="col.sortable ? 'custom' : false"
            :align="col.align || 'left'">
            <template slot-scope="scope">
              <span v-if="col.prop === 'ItemName'" class="item-name-link" @click="handleItemNameClick(scope.row)">
                <i class="el-icon-goods" style="margin-right: 4px; color: #409EFF;"></i>
                {{ scope.row.ItemName || '无' }}
              </span>
              <el-tag v-else-if="col.prop === 'ItemCategory'" 
                :type="getItemCategoryType(scope.row.ItemCategory)" 
                size="small">
                {{ scope.row.ItemCategory || '无' }}
              </el-tag>
              <span v-else-if="col.prop === 'BillingAmount'" class="amount-value">
                ¥{{ formatMoney(scope.row.BillingAmount) }}
              </span>
              <span v-else-if="col.prop === 'BillingAmountRatio'">
                {{ formatPercent(scope.row.BillingAmountRatio) }}%
              </span>
              <span v-else-if="col.prop === 'ItemRatio'">
                {{ formatPercent(scope.row.ItemRatio) }}%
              </span>
              <span v-else-if="col.prop === 'RepeatBuyRate'">
                {{ formatPercent(scope.row.RepeatBuyRate) }}%
              </span>
              <span v-else-if="col.prop === 'ConsumeAmount'" class="amount-paid">
                ¥{{ formatMoney(scope.row.ConsumeAmount) }}
              </span>
              <span v-else-if="col.prop === 'ConsumeAmountRatio'">
                {{ formatPercent(scope.row.ConsumeAmountRatio) }}%
              </span>
              <span v-else-if="col.prop === 'RefundAmount'" class="amount-debt">
                ¥{{ formatMoney(scope.row.RefundAmount) }}
              </span>
              <span v-else-if="col.prop === 'RefundCount'">
                {{ scope.row.RefundCount || 0 }}
              </span>
              <span v-else-if="col.prop === 'DeductAmount'" class="amount-debt">
                ¥{{ formatMoney(scope.row.DeductAmount) }}
              </span>
              <span v-else-if="col.prop === 'DeductCount'">
                {{ scope.row.DeductCount || 0 }}
              </span>
              <span v-else>
                {{ scope.row[col.prop] !== null && scope.row[col.prop] !== undefined ? scope.row[col.prop] : '无' }}
              </span>
            </template>
          </el-table-column>
          <template slot="empty">
            <el-empty description="暂无数据" :image-size="120"></el-empty>
          </template>
        </el-table>
      </div>
    </div>

    <!-- 门店统计详情弹窗 -->
    <store-statistics-dialog
      :visible="dialogVisible"
      :item-id="currentItemId"
      :start-time="query.startTime"
      :end-time="query.endTime"
      @close="dialogVisible = false"
    />

    <!-- 字段设置弹窗 -->
    <el-dialog title="字段设置" :visible.sync="showColumnDialog" width="500px" append-to-body>
      <div class="column-settings">
        <div class="column-actions" style="margin-bottom: 15px;">
          <el-button size="small" @click="selectAllColumns">全选</el-button>
          <el-button size="small" @click="clearAllColumns">清空</el-button>
        </div>
        <el-checkbox-group v-model="selectedColumns">
          <el-checkbox 
            v-for="col in columnOptions" 
            :key="col.prop" 
            :label="col.prop"
            style="display: block; margin-bottom: 10px;">
            {{ col.label }}
          </el-checkbox>
        </el-checkbox-group>
      </div>
      <div slot="footer" class="dialog-footer">
        <el-button @click="showColumnDialog = false">取消</el-button>
        <el-button type="primary" @click="saveColumnSettings">确定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import request from '@/utils/request'
import StoreStatisticsDialog from './components/store-statistics-dialog.vue'

export default {
  name: 'ItemStatistics',
  components: {
    StoreStatisticsDialog
  },
  data() {
    return {
      query: {
        storeId: undefined,
        startTime: undefined,
        endTime: undefined,
        itemId: undefined,
        itemCategory: undefined
      },
      storeOptions: [],
      itemOptions: [],
      itemCategoryOptions: [],
      summaryData: null,
      list: [],
      listLoading: false,
      dialogVisible: false,
      currentItemId: null,
      showColumnDialog: false,
      selectedColumns: [],
      sortInfo: {
        prop: '',
        order: ''
      },
      // 所有列配置
      columnOptions: [
        { prop: 'ItemNumber', label: '品项编号', width: 120, sortable: true, align: 'left' },
        { prop: 'ItemName', label: '品项名称', minWidth: 150, sortable: true, align: 'left', slot: true },
        { prop: 'ItemCategory', label: '品项分类', width: 100, sortable: true, align: 'left', slot: true },
        { prop: 'BillingAmount', label: '开单金额', width: 120, sortable: true, align: 'right', slot: true },
        { prop: 'BillingAmountRatio', label: '开单占比', width: 110, sortable: true, align: 'right', slot: true },
        { prop: 'TotalBuyers', label: '购买人数', width: 100, sortable: true, align: 'right' },
        { prop: 'ItemRatio', label: '人次占比', width: 110, sortable: true, align: 'right', slot: true },
        { prop: 'RepeatBuyers', label: '复购人数', width: 100, sortable: true, align: 'right' },
        { prop: 'RepeatBuyRate', label: '复购率', width: 100, sortable: true, align: 'right', slot: true },
        { prop: 'ConsumeAmount', label: '耗卡金额', width: 120, sortable: true, align: 'right', slot: true },
        { prop: 'ConsumeAmountRatio', label: '耗卡占比', width: 110, sortable: true, align: 'right', slot: true },
        { prop: 'ConsumePurchaseCount', label: '购买耗卡次数', width: 140, sortable: true, align: 'right' },
        { prop: 'ConsumeGiftCount', label: '赠送耗卡次数', width: 140, sortable: true, align: 'right' },
        { prop: 'ConsumeExperienceCount', label: '体验耗卡次数', width: 140, sortable: true, align: 'right' },
        { prop: 'RefundAmount', label: '退款金额', width: 120, sortable: true, align: 'right', slot: true },
        { prop: 'RefundCount', label: '退款次数', width: 100, sortable: true, align: 'right', slot: true },
        { prop: 'DeductAmount', label: '储扣金额', width: 120, sortable: true, align: 'right', slot: true },
        { prop: 'DeductCount', label: '储扣次数', width: 100, sortable: true, align: 'right', slot: true }
      ]
    }
  },
  computed: {
    // 可见的列
    visibleColumns() {
      return this.columnOptions.filter(col => this.selectedColumns.includes(col.prop))
    },
    // 计算表格高度
    tableHeight() {
      // 根据视口高度动态计算，减去筛选条件、统计卡片等的高度
      return 'calc(100vh - 400px)'
    }
  },
  created() {
    this.setDefaultTimeRange()
    this.initStoreOptions()
    this.initItemOptions()
    this.initItemCategoryOptions()
    this.initColumnSettings()
    this.search()
  },
  methods: {
    // 设置默认时间范围（本月1号到现在）
    setDefaultTimeRange() {
      const now = new Date()
      const firstDayOfMonth = new Date(now.getFullYear(), now.getMonth(), 1)
      
      this.query.startTime = this.formatDateTime(firstDayOfMonth.getTime())
      this.query.endTime = this.formatDateTime(now.getTime())
    },

    // 初始化门店选项
    initStoreOptions() {
      request({
        url: '/api/Extend/LqMdxx',
        method: 'GET',
        data: {
          currentPage: 1,
          pageSize: 1000
        }
      }).then(res => {
        this.storeOptions = res.data.list || []
      }).catch(err => {
        console.error('获取门店列表失败:', err)
      })
    },

    // 初始化品项选项
    initItemOptions() {
      request({
        url: '/api/Extend/LqXmzl',
        method: 'GET',
        data: {
          currentPage: 1,
          pageSize: 1000
        }
      }).then(res => {
        this.itemOptions = res.data.list || []
      }).catch(err => {
        console.error('获取品项列表失败:', err)
      })
    },

    // 初始化品项分类选项（使用项目资料表 qt2 字段）
    initItemCategoryOptions() {
      request({
        url: '/api/Extend/lqxmzl/GetDistinctFieldData?fieldName=qt2',
        method: 'GET'
      }).then(res => {
        if (res.code === 200 && res.data && res.data.values) {
          this.itemCategoryOptions = res.data.values.map(item => ({
            label: item,
            value: item
          }))
        } else {
          this.itemCategoryOptions = []
        }
      }).catch(err => {
        console.error('获取品项分类列表失败:', err)
        this.itemCategoryOptions = []
      })
    },

    // 查询数据
    search() {
      this.listLoading = true

      const params = {}

      if (this.query.storeId) {
        params.storeId = this.query.storeId
      }
      
      if (this.query.startTime) {
        params.startTime = this.query.startTime
      }
      
      if (this.query.endTime) {
        params.endTime = this.query.endTime
      }

      if (this.query.itemId) {
        params.itemId = this.query.itemId
      }

      if (this.query.itemCategory) {
        params.itemCategory = this.query.itemCategory
      }

      request({
        url: '/api/Extend/lqxmzl/GetItemStatistics',
        method: 'POST',
        data: params
      }).then(res => {
        if (res.data && res.data.data) {
          this.list = res.data.data
          this.calculateSummary()
        } else {
          this.list = []
          this.summaryData = null
        }
        this.listLoading = false
      }).catch(err => {
        console.error('查询失败:', err)
        this.$message({
          type: 'error',
          message: '查询失败，请重试',
          duration: 1500
        })
        this.listLoading = false
      })
    },

    // 计算汇总数据
    calculateSummary() {
      if (!this.list || this.list.length === 0) {
        this.summaryData = null
        return
      }

      const summary = {
        totalItems: this.list.length,
        totalBillingAmount: this.list.reduce((sum, item) => sum + (item.BillingAmount || 0), 0),
        totalBuyers: this.list.reduce((sum, item) => sum + (item.TotalBuyers || 0), 0),
        totalRefundAmount: this.list.reduce((sum, item) => sum + (item.RefundAmount || 0), 0)
      }

      this.summaryData = summary
    },

    // 重置查询条件
    reset() {
      this.query = {
        storeId: undefined,
        startTime: undefined,
        endTime: undefined,
        itemId: undefined,
        itemCategory: undefined
      }
      this.setDefaultTimeRange()
      this.summaryData = null
      this.list = []
      this.search()
    },

    // 格式化金额
    formatMoney(amount) {
      if (!amount && amount !== 0) return '0.00'
      return Number(amount).toFixed(2)
    },

    // 格式化百分比
    formatPercent(ratio) {
      if (!ratio && ratio !== 0) return '0.00'
      return (Number(ratio) * 100).toFixed(2)
    },

    // 格式化日期时间（用于API传参）
    formatDateTime(timestamp) {
      if (!timestamp) return ''
      const date = new Date(timestamp)
      const year = date.getFullYear()
      const month = String(date.getMonth() + 1).padStart(2, '0')
      const day = String(date.getDate()).padStart(2, '0')
      const hours = String(date.getHours()).padStart(2, '0')
      const minutes = String(date.getMinutes()).padStart(2, '0')
      const seconds = String(date.getSeconds()).padStart(2, '0')
      return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`
    },

    // 点击品项名称
    handleItemNameClick(row) {
      if (!row.ItemId) {
        this.$message({
          type: 'warning',
          message: '品项ID不存在',
          duration: 1500
        })
        return
      }

      if (!this.query.startTime || !this.query.endTime) {
        this.$message({
          type: 'warning',
          message: '请先选择开始时间和结束时间',
          duration: 1500
        })
        return
      }

      this.currentItemId = row.ItemId
      this.dialogVisible = true
    },

    // 初始化列设置
    initColumnSettings() {
      // 默认显示所有列
      const allColumns = this.columnOptions.map(col => col.prop)
      // 尝试从本地存储读取
      const savedColumns = localStorage.getItem('form4_column_settings')
      if (savedColumns) {
        try {
          const columns = JSON.parse(savedColumns)
          if (Array.isArray(columns) && columns.length > 0) {
            // 合并本地存储的列和新添加的列（确保新字段也被包含）
            const newFields = ['ItemCategory', 'DeductAmount', 'DeductCount']
            const mergedColumns = [...columns]
            // 添加新字段（如果不存在）
            newFields.forEach(field => {
              if (!mergedColumns.includes(field)) {
                mergedColumns.push(field)
              }
            })
            // 过滤掉不存在的列（兼容性处理）
            this.selectedColumns = mergedColumns.filter(col => allColumns.includes(col))
            // 如果过滤后为空，使用默认所有列
            if (this.selectedColumns.length === 0) {
              this.selectedColumns = allColumns
            }
          } else {
            this.selectedColumns = allColumns
          }
        } catch (e) {
          console.error('读取列设置失败:', e)
          this.selectedColumns = allColumns
        }
      } else {
        this.selectedColumns = allColumns
      }
    },

    // 全选列
    selectAllColumns() {
      this.selectedColumns = this.columnOptions.map(col => col.prop)
    },

    // 清空列
    clearAllColumns() {
      this.selectedColumns = []
    },

    // 保存列设置
    saveColumnSettings() {
      if (this.selectedColumns.length === 0) {
        this.$message({
          type: 'warning',
          message: '至少需要显示一列',
          duration: 1500
        })
        return
      }
      // 保存到本地存储
      localStorage.setItem('form4_column_settings', JSON.stringify(this.selectedColumns))
      this.showColumnDialog = false
      this.$message({
        type: 'success',
        message: '字段设置已保存',
        duration: 1500
      })
    },

    // 排序变化
    handleSortChange({ column, prop, order }) {
      this.sortInfo = {
        prop: prop || '',
        order: order || ''
      }
      this.sortList()
    },

    // 排序列表
    sortList() {
      if (!this.sortInfo.prop || !this.sortInfo.order) {
        return
      }

      const prop = this.sortInfo.prop
      const order = this.sortInfo.order
      const isAsc = order === 'ascending'

      // 字符串类型字段（如品项分类）使用字符串比较
      const stringFields = ['ItemCategory', 'ItemName', 'ItemNumber']
      const isStringField = stringFields.includes(prop)

      this.list.sort((a, b) => {
        let aVal = a[prop]
        let bVal = b[prop]

        // 字符串字段处理
        if (isStringField) {
          aVal = aVal !== null && aVal !== undefined ? String(aVal) : ''
          bVal = bVal !== null && bVal !== undefined ? String(bVal) : ''
          if (isAsc) {
            return aVal.localeCompare(bVal)
          } else {
            return bVal.localeCompare(aVal)
          }
        }

        // 数字字段处理
        // 处理空值
        if (aVal === null || aVal === undefined) aVal = 0
        if (bVal === null || bVal === undefined) bVal = 0

        // 转换为数字进行比较
        aVal = Number(aVal)
        bVal = Number(bVal)

        if (isNaN(aVal)) aVal = 0
        if (isNaN(bVal)) bVal = 0

        if (isAsc) {
          return aVal - bVal
        } else {
          return bVal - aVal
        }
      })
    },

    // 获取品项分类的标签类型
    getItemCategoryType(category) {
      if (!category) {
        return 'info'
      }
      if (category === '医美') {
        return 'danger'
      } else if (category === '科美') {
        return 'warning'
      } else if (category === '生美') {
        return 'success'
      }
      return 'info'
    }
  }
}
</script>

<style lang="scss" scoped>
.statistics-cards {
  margin-bottom: 20px;
}

.statistics-card {
  height: 100px;
  padding: 12px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  
  .card-icon {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    background: linear-gradient(135deg, #409EFF, #67C23A);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 16px;
    
    i {
      font-size: 24px;
      color: #fff;
    }
  }
  
  .card-content {
    flex: 1;
    
    .card-title {
      font-size: 14px;
      color: #909399;
      margin-bottom: 8px;
    }
    
    .card-value {
      font-size: 24px;
      font-weight: bold;
      color: #303133;
    }
  }
}

.amount-value {
  color: #409EFF;
  font-weight: 500;
}

.amount-paid {
  color: #67C23A;
  font-weight: 500;
}

.amount-debt {
  color: #F56C6C;
  font-weight: 500;
}

.item-name-link {
  color: #409EFF;
  cursor: pointer;
  transition: color 0.3s;
  
  &:hover {
    color: #66b1ff;
    text-decoration: underline;
  }
}

.table-wrapper {
  height: 100%;
  overflow: hidden;
  
  ::v-deep .el-table {
    width: 100%;
  }
  
  ::v-deep .el-table__body-wrapper {
    overflow-y: auto;
    overflow-x: auto;
  }
  
  ::v-deep .el-table__header-wrapper {
    overflow-x: auto;
    overflow-y: hidden;
    // 隐藏滚动条但保持滚动功能
    scrollbar-width: none; // Firefox
    -ms-overflow-style: none; // IE 和 Edge
    
    &::-webkit-scrollbar {
      display: none; // Chrome, Safari, Opera
      width: 0;
      height: 0;
    }
  }
}
</style>

