import { message } from "@/utils/message";
import { type Ref, ref, reactive } from "vue";
import type { PaginationProps } from "@pureadmin/table";
import type { QueryCodeResult, QueryResult, QueryResultItem } from "types/code";
import {
  ElMessageBox,
  type UploadProps,
  type UploadUserFile
} from "element-plus";
import {
  getQueryCodeAPI,
  getQueryTemplateAPI,
  postCodeInfoAPI
} from "@/api/code";
import { deleteFileAPI, postUploadFileAPI } from "@/api/file";

export const useIndex = (tableRef: Ref) => {
  /**
   * 查询表单
   */
  const form = reactive({
    query_text: ""
  });
  /**
   * 表单Ref
   */
  // const formRef = ref(null);
  /**
   * 数据列表
   */
  const dataList = ref<QueryResult[]>([]);
  /**
   * 加载状态
   */
  const loading = ref(false);
  /**
   * 已选数量
   */
  const selectedNum = ref<number>(0);
  /**
   * 分页参数
   */
  const pagination = reactive<PaginationProps>({
    total: 0,
    pageSize: 10,
    currentPage: 1,
    background: true,
    pageSizes: [10, 20, 30, 40, 50]
  });
  // 上传文件区域显示状态
  const showUploadArea = ref(false);
  const fileList = ref<UploadUserFile[]>([]);
  /**上传成功后文件列表 */
  const fileIds = ref([]);
  const fileId = ref<string>("");
  /**上传按钮状态 */
  const uploadStatus = ref<boolean>(false);
  /**
   * 查询结果
   */
  const queryResult = ref<QueryCodeResult>();
  const activeCollapse = ref(["baseInfo"]);
  /**列表值 */
  const rowInfo = reactive<QueryResult>({
    query_text: "",
    status: 0,
    id: "",
    result_text: []
  });
  /**抽屉状态 */
  const drawerStatus = ref<boolean>(false);
  /**
   * 表格列设置
   */
  const columns: TableColumnList = [
    {
      label: "勾选列", // 如果需要表格多选，此处label必须设置
      type: "selection",
      fixed: "left",
      reserveSelection: true // 数据刷新后保留选项
    },
    {
      label: "查询ID",
      prop: "id"
    },
    {
      label: "查询文本",
      prop: "query_text"
    },
    {
      label: "操作",
      fixed: "right",
      width: 250,
      slot: "operation"
    }
  ];
  /**
   * 初次查询
   */
  const onSearch = async () => {
    loading.value = true;
    const res = await postCodeInfoAPI({
      query_text: form.query_text
    });
    if (res.success) {
      queryResult.value = res.data;
      dataList.value = res.data.response_result;
      pagination.total = res.data.result_count;
    }
    message(res.msg, {
      type: res.success ? "success" : "error"
    });
    loading.value = false;
  };
  /**
   * 重置表单
   * @param formEl 表单ref
   * @returns
   */
  const resetForm = (formEl: any) => {
    if (!formEl) return;
    formEl.resetFields();
    onSearch();
  };
  /** 当CheckBox选择项发生变化时会触发该事件 */
  const handleSelectionChange = async (val: any) => {
    selectedNum.value = val.length;
    // 重置表格高度
    tableRef.value.setAdaptive();
  };

  /** 取消选择 */
  const onSelectionCancel = async () => {
    selectedNum.value = 0;
    // 用于多选表格，清空用户的选择
    tableRef.value.getTableRef().clearSelection();
  };
  /**下载模版文件 */
  const onDownloadTemplate = async () => {
    try {
      const blob = await getQueryTemplateAPI();

      // 生成下载链接
      // @ts-ignore
      const url = URL.createObjectURL(blob);

      // 创建 <a> 元素并触发下载
      const link = document.createElement("a");
      link.href = url;
      link.download = "上传模版.xlsx"; // 设置下载文件名，确保后缀名正确
      document.body.appendChild(link); // 将 <a> 元素添加到 DOM 中
      link.click(); // 模拟点击下载

      // 清理 URL 对象
      URL.revokeObjectURL(url);
      document.body.removeChild(link); // 移除 <a> 元素
    } catch (error) {
      console.error("下载模板失败:", error);
    }
  };
  /** 上传文件前 */
  const beforeUpload = async file => {
    const isExcel =
      file.type ===
        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" || // xlsx
      file.type === "application/vnd.ms-excel" || // xls
      file.name.endsWith(".xlsx") || // 兼容部分浏览器
      file.name.endsWith(".xls"); // 兼容部分浏览器

    // const maxSize = 20 * 1024 * 1024; // 20MB 限制

    if (!isExcel) {
      message("只能上传 xlsx 或 xls 文件!", { type: "error" });
      return false;
    }
    /*
      if (file.size > maxSize) {
        message("文件大小应在 20MB 以内!", { type: "error" });
        return false;
      }
        */

    return true;
  };

  /**处理文件上传 */
  const handleUpload = async () => {
    if (fileList.value.length === 0) {
      message("请先上传文件！", { type: "error", duration: 5000 });
      return;
    }
    uploadStatus.value = true;
    for (const file of fileList.value) {
      if (file.status === "success") {
        const data = await getQueryCodeAPI(fileId.value);
        if (data.success) {
          message("查询成功！", { type: "success" });
          queryResult.value = data.data;
          dataList.value = data.data.response_result;
          pagination.total = data.data.result_count;
        }
        continue;
      }
      try {
        const res = await postUploadFileAPI({
          file: file.raw
        });
        if (res.success) {
          file.status = "success";
          fileId.value = res.data.id;
          message(`${res.data.name}上传成功！`, { type: "success" });
          fileIds.value.push(res.data);
          const data = await getQueryCodeAPI(fileId.value);
          if (data.success) {
            message(`查询成功！`, { type: "success" });
            queryResult.value = data.data;
            dataList.value = data.data.response_result;
            pagination.total = data.data.result_count;
          }
        } else {
          file.status = "fail";
        }
      } catch (error) {
        console.error(error);
      }
    }
    uploadStatus.value = false;
  };
  /**移除文件 */
  const beforeRemove: UploadProps["beforeRemove"] = async uploadFile => {
    return ElMessageBox.confirm(`是否移除 ${uploadFile.name} ?`).then(
      async () => {
        if (uploadFile.status === "success") {
          const fileId = fileIds.value.filter(
            item => item.filename === uploadFile.name
          )[0]["fileId"];
          const res = await deleteFileAPI(fileId);
          if (res.code === 200) {
            message(res.msg, { type: "success" });
            return true;
          } else {
            message(res.msg, { type: "error" });
            return false;
          }
        } else {
          return true;
        }
      },
      () => false
    );
  };
  const handleDetail = (row: QueryResultItem) => {
    drawerStatus.value = true;
    Object.assign(rowInfo, row);
  };
  return {
    form,
    dataList,
    loading,
    pagination,
    columns,
    queryResult,
    selectedNum,
    showUploadArea,
    fileIds,
    fileList,
    uploadStatus,
    rowInfo,
    drawerStatus,
    activeCollapse,
    beforeUpload,
    handleUpload,
    beforeRemove,
    onSearch,
    resetForm,
    handleSelectionChange,
    onSelectionCancel,
    onDownloadTemplate,
    handleDetail
  };
};