<template>
  <div class="app-container">
    <el-form
      :model="queryParams"
      ref="queryForm"
      :inline="true"
      label-width="68px"
    >
      <el-form-item label="讲师姓名" prop="name">
        <el-input
          v-model="queryParams.name"
          placeholder="请输入讲师姓名"
          clearable
          size="small"
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button
          type="primary"
          icon="el-icon-search"
          size="mini"
          @click="handleQuery"
          >搜索</el-button
        >
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery"
          >重置</el-button
        >
      </el-form-item>
    </el-form>

    <div class="mb8 btn-list">
      <el-button
        type="primary"
        icon="el-icon-plus"
        size="mini"
        @click="handleAdd"
        v-hasPermi="['benyi:lecturer:add']"
        >新增</el-button
      >
      <el-button
        type="success"
        icon="el-icon-edit"
        size="mini"
        :disabled="single"
        @click="handleUpdate"
        v-hasPermi="['benyi:lecturer:edit']"
        >修改</el-button
      >
      <el-button
        type="danger"
        icon="el-icon-delete"
        size="mini"
        :disabled="multiple"
        @click="handleDelete"
        v-hasPermi="['benyi:lecturer:remove']"
        >删除</el-button
      >
      <el-button
        type="warning"
        icon="el-icon-download"
        size="mini"
        @click="handleExport"
        v-hasPermi="['benyi:lecturer:export']"
        >导出</el-button
      >
    </div>

    <el-table
      v-loading="loading"
      :data="lecturerList"
      @selection-change="handleSelectionChange"
    >
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="编号" width="80" align="center" prop="id" />
      <el-table-column label="讲师姓名" align="center" prop="name" />
      <el-table-column label="讲师简介" align="center" prop="information" />
      <el-table-column
        label="创建时间"
        align="center"
        prop="createtime"
        width="180"
      >
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.createtime) }}</span>
        </template>
      </el-table-column>
      <el-table-column
        label="操作"
        align="center"
        width="150"
        class-name="small-padding fixed-width"
      >
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['benyi:lecturer:edit']"
            >修改</el-button
          >
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['benyi:lecturer:remove']"
            >删除</el-button
          >
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total > 0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改讲师对话框 -->
    <el-dialog :title="title" :visible.sync="open" class="v-dialog">
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="讲师姓名" prop="name">
          <el-input v-model="form.name" placeholder="请输入姓名" />
        </el-form-item>
        <el-form-item label="讲师简介" prop="information">
          <el-input
            v-model="form.information"
            type="textarea"
            placeholder="请输入内容"
          />
          <el-input v-model="form.imgurl" v-if="false" />
        </el-form-item>
        <el-form-item label="选择照片" prop="imgurl">
          <el-upload
            class="avatar-uploader"
            :action="uploadImgUrl"
            :headers="headers"
            :show-file-list="false"
            :on-success="handleAvatarSuccess"
            :before-upload="beforeAvatarUpload"
            accept=".jpg"
          >
            <img v-if="imageUrl" :src="imageUrl" class="avatar" />
            <i v-else class="el-icon-plus avatar-uploader-icon"></i>
          </el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import {
  listLecturer,
  getLecturer,
  delLecturer,
  addLecturer,
  updateLecturer,
  exportLecturer
} from "@/api/benyi_train/lecturer";

import { getToken } from "@/utils/auth";

export default {
  name: "Lecturer",
  data() {
    return {
      //显示上传的图片，清空
      imageUrl: "",
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 总条数
      total: 0,
      // 讲师表格数据
      lecturerList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        name: undefined,
        information: undefined,
        imgurl: undefined,
        createuserid: undefined,
        createtime: undefined
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        name: [
          { required: true, message: "讲师姓名不能为空", trigger: "blur" }
        ],
        information: [
          { required: true, message: "讲师简介不能为空", trigger: "blur" }
        ]
      },
      uploadImgUrl: process.env.VUE_APP_BASE_API + "/common/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken()
      }
    };
  },
  created() {
    this.getList();
  },
  methods: {
    handleAvatarSuccess(res, file) {
      this.imageUrl = URL.createObjectURL(file.raw);
      console.log(res);
      if (res.code == "200") {
        this.form.imgurl = res.fileName;
      } else {
        this.msgError(res.msg);
      }
    },
    beforeAvatarUpload(file) {
      const isJPG = file.type === "image/jpeg";
      const isLt2M = file.size / 1024 / 1024 < 2;

      if (!isJPG) {
        this.$message.error("上传头像图片只能是 JPG 格式!");
      }
      if (!isLt2M) {
        this.$message.error("上传头像图片大小不能超过 2MB!");
      }
      return isJPG && isLt2M;
    },
    /** 查询讲师列表 */
    getList() {
      this.loading = true;
      listLecturer(this.queryParams).then(response => {
        this.lecturerList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        id: undefined,
        name: undefined,
        information: undefined,
        imgurl: undefined,
        createuserid: undefined,
        createtime: undefined
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id);
      this.single = selection.length != 1;
      this.multiple = !selection.length;
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.imageUrl = ""; //清空图片
      this.reset();
      this.open = true;
      this.title = "添加讲师";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.imageUrl = ""; //清空图片
      this.reset();
      const id = row.id || this.ids;
      getLecturer(id).then(response => {
        this.form = response.data;
        //console.log(process.env.VUE_APP_BASE_API + response.data.imgurl);
        if (response.data.imgurl) {
          this.imageUrl = process.env.VUE_APP_BASE_API + response.data.imgurl;
        }
        this.open = true;
        this.title = "修改讲师";
      });
    },
    /** 提交按钮 */
    submitForm: function() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          console.log(this.form.imgurl);
          if (this.form.id != undefined) {
            updateLecturer(this.form).then(response => {
              if (response.code === 200) {
                this.msgSuccess("修改成功");
                this.open = false;
                this.getList();
              } else {
                this.msgError(response.msg);
              }
            });
          } else {
            addLecturer(this.form).then(response => {
              if (response.code === 200) {
                this.msgSuccess("新增成功");
                this.open = false;
                this.getList();
              } else {
                this.msgError(response.msg);
              }
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids;
      this.$confirm('是否确认删除讲师编号为"' + ids + '"的数据项?', "警告", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(function() {
          return delLecturer(ids);
        })
        .then(() => {
          this.getList();
          this.msgSuccess("删除成功");
        })
        .catch(function() {});
    },
    /** 导出按钮操作 */
    handleExport() {
      const queryParams = this.queryParams;
      this.$confirm("是否确认导出所有讲师数据项?", "警告", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(function() {
          return exportLecturer(queryParams);
        })
        .then(response => {
          this.download(response.msg);
        })
        .catch(function() {});
    }
  }
};
</script>

<style lang="scss" scoped>
.avatar-uploader ::v-deep.el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.avatar-uploader ::v-deep.el-upload:hover {
  border-color: #409eff;
}
.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  line-height: 178px;
  text-align: center;
}
.avatar {
  width: 178px;
  height: 178px;
  display: block;
}
</style>
