<template>
  <div>
    <div class="user-info-head" @click="editCropper()">
      <img :src="options.img" title="点击上传头像" class="img-circle img-lg" />
    </div>
    <el-dialog
      :title="title"
      :visible.sync="open"
      width="800px"
      append-to-body
      @opened="modalOpened"
      @close="closeDialog"
    >
      <el-row>
        <el-col :xs="24" :md="12" :style="{ height: '350px' }">
          <vue-cropper
            v-if="visible"
            ref="cropper"
            :img="options.img"
            :info="true"
            :auto-crop="options.autoCrop"
            :auto-crop-width="options.autoCropWidth"
            :auto-crop-height="options.autoCropHeight"
            :fixed-box="options.fixedBox"
            :output-type="options.outputType"
            @realTime="realTime"
          />
        </el-col>
        <el-col :xs="24" :md="12" :style="{ height: '350px' }">
          <div class="avatar-upload-preview">
            <img :src="previews.url" :style="previews.img" />
          </div>
        </el-col>
      </el-row>
      <br />
      <el-row>
        <el-col :lg="2" :sm="3" :xs="3">
          <el-upload
            action="#"
            :http-request="requestUpload"
            :show-file-list="false"
            :before-upload="beforeUpload"
          >
            <el-button size="small">
              选择
              <i class="el-icon-upload el-icon--right" />
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{ span: 1, offset: 2 }" :sm="2" :xs="2">
          <el-button icon="el-icon-plus" size="small" @click="changeScale(1)" />
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
          <el-button
            icon="el-icon-minus"
            size="small"
            @click="changeScale(-1)"
          />
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
          <el-button
            icon="el-icon-refresh-left"
            size="small"
            @click="rotateLeft()"
          />
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
          <el-button
            icon="el-icon-refresh-right"
            size="small"
            @click="rotateRight()"
          />
        </el-col>
        <el-col :lg="{ span: 2, offset: 6 }" :sm="2" :xs="2">
          <el-button type="primary" size="small" @click="uploadImg()"
            >提 交</el-button
          >
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
import store from '@/store';
import { VueCropper } from 'vue-cropper';
import { uploadAvatar } from '@/api/system/user';
import { debounce } from '@/utils';

export default {
  components: { VueCropper },
  data() {
    return {
      // 是否显示弹出层
      open: false,
      // 是否显示cropper
      visible: false,
      // 弹出层标题
      title: '修改头像',
      options: {
        img: store.getters.avatar, // 裁剪图片的地址
        autoCrop: true, // 是否默认生成截图框
        autoCropWidth: 200, // 默认生成截图框宽度
        autoCropHeight: 200, // 默认生成截图框高度
        fixedBox: true, // 固定截图框大小 不允许改变
        outputType: 'png', // 默认生成截图为PNG格式
        filename: 'avatar' // 文件名称
      },
      previews: {},
      resizeHandler: null
    };
  },
  methods: {
    // 编辑头像
    editCropper() {
      this.open = true;
    },
    // 打开弹出层结束时的回调
    modalOpened() {
      this.visible = true;
      if (!this.resizeHandler) {
        this.resizeHandler = debounce(() => {
          this.refresh();
        }, 100);
      }
      window.addEventListener('resize', this.resizeHandler);
    },
    // 刷新组件
    refresh() {
      this.$refs.cropper.refresh();
    },
    // 覆盖默认的上传行为
    requestUpload() {},
    // 向左旋转
    rotateLeft() {
      this.$refs.cropper.rotateLeft();
    },
    // 向右旋转
    rotateRight() {
      this.$refs.cropper.rotateRight();
    },
    // 图片缩放
    changeScale(num) {
      num = num || 1;
      this.$refs.cropper.changeScale(num);
    },
    // 上传预处理
    beforeUpload(file) {
      if (file.type.indexOf('image/') == -1) {
        this.$modal.msgError(
          '文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。'
        );
      } else {
        const reader = new FileReader();
        reader.readAsDataURL(file);
        reader.onload = () => {
          this.options.img = reader.result;
          this.options.filename = file.name;
        };
      }
    },
    // 上传图片
    uploadImg() {
      this.$refs.cropper.getCropBlob((data) => {
        const formData = new FormData();
        formData.append('avatarfile', data, this.options.filename);
        uploadAvatar(formData).then((response) => {
          this.open = false;
          this.options.img = process.env.VUE_APP_BASE_API + response.imgUrl;
          store.commit('SET_AVATAR', this.options.img);
          this.$modal.msgSuccess('修改成功');
          this.visible = false;
        });
      });
    },
    // 实时预览
    realTime(data) {
      this.previews = data;
    },
    // 关闭窗口
    closeDialog() {
      this.options.img = store.getters.avatar;
      this.visible = false;
      window.removeEventListener('resize', this.resizeHandler);
    }
  }
};
</script>
<style scoped lang="scss">
.user-info-head {
  position: relative;
  display: inline-block;
  height: 120px;
}

.user-info-head:hover:after {
  content: '+';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  color: #eee;
  background: rgba(0, 0, 0, 0.5);
  font-size: 24px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: pointer;
  line-height: 110px;
  border-radius: 50%;
}
</style>
