/** Copyright 2020 Zhejiang Lab. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* =============================================================
*/

import { isNil } from 'lodash';
import { reactive, watch, ref } from '@vue/composition-api';

const BaseModal = {
  name: 'BaseModal',
  inheritAttrs: false,
  model: {
    prop: 'visible',
    event: 'change',
  },
  props: {
    visible: {
      type: Boolean,
      default: false,
    },
    width: {
      type: String,
      default: '600px',
    },
    okText: {
      type: String,
      default: '确定',
    },
    cancelText: {
      type: String,
      default: '取消',
    },
    footer: Function,
    showCancel: {
      type: Boolean,
      default: true,
    },
    loading: {
      type: Boolean,
      default: false,
    },
    disabled: {
      type: Boolean,
      default: false,
    },
  },
  setup(props, ctx) {
    const dialogRef = ref(null);
    const state = reactive({
      sVisible: !isNil(props.visible) ? props.visible : false,
    });

    const handleCancel = (e) => {
      ctx.emit('cancel', e);
      ctx.emit('change', false);
    };

    const handleOk = (e) => {
      ctx.emit('ok', e);
    };

    const handleClose = e => {
      // 这里只针对状态变更进行控制，只转发 element close 事件
      ctx.emit('close', e);
      ctx.emit('change', false);
    };

    watch(() => props.visible, (next) => {
      Object.assign(state, {
        sVisible: next,
      });
    }, {
      lazy: true,
    });

    return {
      state,
      dialogRef,
      handleCancel,
      handleClose,
      handleOk,
    };
  },
  render() {
    const renderFooter = () => {
      return (
        <div class='modal-footer'>
          { this.showCancel && (
            <el-button id="cancel" onClick={this.handleCancel}>{this.cancelText}</el-button>
          )
          }
          <el-button id="ok" type='primary' disabled={this.disabled} onClick={this.handleOk} loading={this.loading}>{this.okText}</el-button>
        </div>
      );
    };
    // footer
    const footer = this.$slots.footer || renderFooter();

    const dialogProps = {
      props: {
        closeOnClickModal: false,
        appendToBody: true,
        visible: this.state.sVisible,
        ...this.$props,
        ...this.$attrs,
      },
      on: {
        close: this.handleClose,
        // 转发 el-dialog 事件
        ...this.$listeners,
      },
    };

    return (
      <el-dialog {...dialogProps} ref='dialogRef'>
        {this.$slots.default}
        <div slot='footer'>{footer}</div>
      </el-dialog>
    );
  },
};

export default BaseModal;