import { ref, computed } from 'vue';
import { 
  getRegionTree,
  getCustomerIntentDict,
  getCustomerIntentLevelDict,
  getCustomerSourceDict,
  getCustomerTypeDict,
  getCustomerStatusDict,
  getWechatList
} from '@/common/api';

/**
 * 客户表单共享逻辑
 */
export function useCustomerForm() {
  // 字典数据
  const customerTypeOptions = ref([]);
  const sourceOptions = ref([]);
  const intentOptions = ref([]);
  const intentLevelOptions = ref([]);
  const customerStatusOptions = ref([]);
  const workWechatOptions = ref([]);

  // 地区数据
  const provinces = ref([]);
  const citys = ref([]);
  const areas = ref([]);
  const regionLoading = ref(true);

  // 计算属性：返回地址列表
  const addressList = computed(() => {
    return [provinces.value, citys.value, areas.value];
  });

  // 加载字典数据
  const loadDictData = async () => {
    try {
      const [typeRes, sourceRes, intentRes, intentLevelRes, statusRes] = await Promise.all([
        getCustomerTypeDict(),
        getCustomerSourceDict(),
        getCustomerIntentDict(),
        getCustomerIntentLevelDict(),
        getCustomerStatusDict()
      ]);
      
      customerTypeOptions.value = (typeRes || []).map(item => ({
        label: item.dictLabel,
        value: item.dictValue
      }));
      
      sourceOptions.value = (sourceRes || []).map(item => ({
        label: item.dictLabel,
        value: item.dictValue
      }));
      
      intentOptions.value = (intentRes || []).map(item => ({
        label: item.dictLabel,
        value: item.dictValue
      }));
      
      intentLevelOptions.value = (intentLevelRes || []).map(item => ({
        label: item.dictLabel,
        value: item.dictValue
      }));
      
      customerStatusOptions.value = (statusRes || []).map(item => ({
        label: item.dictLabel,
        value: item.dictValue
      }));
    } catch (err) {
      console.error('加载字典数据失败:', err);
      uni.showToast({
        title: '加载字典数据失败',
        icon: 'none'
      });
    }
  };

  // 加载微信列表数据
  const loadWechatList = async () => {
    try {
      const res = await getWechatList();
      const rows = res?.rows || [];
      
      workWechatOptions.value = rows.map(item => ({
        label: item.nickName ? `${item.nickName} (${item.wechatId})` : item.wechatId,
        value: String(item.id),
        id: item.id,
        wechatId: item.wechatId
      }));
    } catch (err) {
      console.error('加载微信列表失败:', err);
      uni.showToast({
        title: '加载微信列表失败',
        icon: 'none'
      });
    }
  };

  // 加载地区树数据
  const loadRegionTree = async () => {
    try {
      const res = await getRegionTree();
      const regionTree = res;
      
      provinces.value = regionTree.sort((left, right) => 
        (Number(left.code || left.id) > Number(right.code || right.id) ? 1 : -1)
      );
      
      if (provinces.value.length > 0) {
        citys.value = provinces.value[0]?.children || [];
        if (citys.value.length > 0) {
          areas.value = citys.value[0]?.children || [];
        }
      }
      
      setTimeout(() => {
        regionLoading.value = false;
      }, 200);
    } catch (err) {
      console.error('加载地区树失败:', err);
      regionLoading.value = false;
      uni.showToast({
        title: '加载地区数据失败',
        icon: 'none'
      });
    }
  };

  // 根据已选择的ID设置默认选中项
  const handlePickValueDefault = (formData, pickersRef) => {
    if (!formData.regionIds || formData.regionIds.length === 0) {
      return;
    }
    
    const [provinceId, cityId, districtId] = formData.regionIds;
    
    const provinceIndex = provinces.value.findIndex(item => Number(item.id) === Number(provinceId));
    if (provinceIndex >= 0) {
      citys.value = provinces.value[provinceIndex]?.children || [];
      const cityIndex = citys.value.findIndex(item => Number(item.id) === Number(cityId));
      if (cityIndex >= 0) {
        areas.value = citys.value[cityIndex]?.children || [];
        const districtIndex = areas.value.findIndex(item => Number(item.id) === Number(districtId));
        if (districtIndex >= 0 && pickersRef) {
          pickersRef.setRegionIndexs([provinceIndex, cityIndex, districtIndex]);
        }
      }
    }
  };

  // 处理地区选择器change事件
  const handleRegionChange = (e, pickersRef) => {
    if (regionLoading.value) return;
    
    const { columnIndex, index, indexs } = e;
    
    if (columnIndex === 0) {
      citys.value = provinces.value[index]?.children || [];
      areas.value = citys.value[0]?.children || [];
      if (pickersRef) {
        pickersRef.setRegionIndexs([index, 0, 0]);
      }
    } else if (columnIndex === 1) {
      areas.value = citys.value[index]?.children || [];
      if (pickersRef) {
        pickersRef.setRegionIndexs(indexs);
      }
    }
  };

  // 处理地区选择器confirm事件
  const handleRegionConfirm = (e, formData) => {
    const { value } = e;
    
    if (value && value.length > 0) {
      const province = value[0];
      const city = value[1];
      const district = value[2];
      
      const regionNames = [];
      const regionIds = [];
      
      if (province) {
        regionNames.push(province.name);
        regionIds.push(province.id);
        
        if (city) {
          regionNames.push(city.name);
          regionIds.push(city.id);
          
          if (district) {
            regionNames.push(district.name);
            regionIds.push(district.id);
          }
        }
      }
      
      formData.region = regionNames.join('/');
      formData.regionIds = regionIds;
    } else {
      formData.region = '';
      formData.regionIds = [];
    }
  };

  // 打开地区选择器
  const openRegionPicker = (formData, pickersRef) => {
    if (regionLoading.value || provinces.value.length === 0) {
      uni.showToast({
        title: '地区数据加载中，请稍候',
        icon: 'none'
      });
      return;
    }
    
    if (formData.regionIds && formData.regionIds.length > 0) {
      handlePickValueDefault(formData, pickersRef);
    } else {
      if (citys.value.length === 0 && provinces.value.length > 0) {
        citys.value = provinces.value[0]?.children || [];
        if (citys.value.length > 0) {
          areas.value = citys.value[0]?.children || [];
        }
      }
    }
    
    if (pickersRef) {
      pickersRef.openRegionPicker();
      if (!formData.regionIds || formData.regionIds.length === 0) {
        setTimeout(() => {
          if (pickersRef) {
            pickersRef.setRegionIndexs([0, 0, 0]);
          }
        }, 100);
      }
    }
  };

  return {
    // 数据
    customerTypeOptions,
    sourceOptions,
    intentOptions,
    intentLevelOptions,
    customerStatusOptions,
    workWechatOptions,
    provinces,
    citys,
    areas,
    regionLoading,
    addressList,
    // 方法
    loadDictData,
    loadWechatList,
    loadRegionTree,
    handlePickValueDefault,
    handleRegionChange,
    handleRegionConfirm,
    openRegionPicker
  };
}