import React, { Component } from 'react';
import { Icon, message, Spin, Upload, Progress, Modal } from 'antd';
import $ from 'jquery/src/ajax';
import './index.less';
import Viewer from 'viewerjs';
import 'viewerjs/dist/viewer.css';
import PropTypes from 'prop-types';
import pdfimg from '../../../../image/pdf_logo.png';

const uploadButton = (
  <div>
    <Icon type="plus" />
    <div className="ant-upload-text" style={{ cursor: 'pointer' }}>点击上传</div>
  </div>
);

class ImgList extends Component {
  constructor(props) {
    super(props);
    this.state = {
      seeMore: false,
      gallery: null,
      loading: true,
      imgLoadNum: 0,

      uploadLoading: false,
      percent: 0,

      newUploadArr: [],
      newUploadInforArr: {},
      isPDF: false,
      file: {},
    }
    this.imgLoading = this.imgLoading.bind(this);
    this.beforeUpload = this.beforeUpload.bind(this);
    this.onRemove = this.onRemove.bind(this);
    this.setTimeOutObj = null;
  }

  componentDidMount() {
    this.setTimeOutObj = setTimeout(() => {
      this.setState({
        gallery: new Viewer(document.getElementById(this.props.domId))
      }, () => {
        this.setState({
          loading: false
        })
      })
    }, 10000)
  }

  imgLoading() {
    if (Object.keys(this.props.uploadConfig).length !== 0) {
      this.setTimeOutObj && clearTimeout(this.setTimeOutObj);
    } else {
      let num = this.state.imgLoadNum + 1;
      if (num >= this.props.fileList.length) {
        this.state.gallery && this.state.gallery.destroy();
        this.setState({
          gallery: new Viewer(document.getElementById(this.props.domId))
        }, () => {
          this.setTimeOutObj && clearTimeout(this.setTimeOutObj);
          this.setState({
            loading: false
          })
        })
      }
      this.setState({
        imgLoadNum: num
      })
    }
  }

  beforeUpload(file) {
    const { isSupportPDF = false } = this.props
    const isLt2M = file.size / 1024 / 1024 < 20;
    if (!isLt2M) {
      message.error('文件大小不能超过 20MB!');
      return isLt2M;
    }
    if (this.props.accept) {
      if (isLt2M) {
        this.state.newUploadArr.push(file)
        this.setState({
          newUploadArr: this.state.newUploadArr
        })
      }
      return isLt2M;
    } else {
      const isJPG = file.type.split('/');
      if (isSupportPDF) {
        if (isJPG[0] !== 'image' && isJPG[0] !== "application") {
          message.error('只能上传图片或pdf文件!');
          return false;
        }
      } else {
        if (isJPG[0] !== 'image') {
          message.error('只能上传图片!');
          return false;
        }
      }
      if (isJPG && isLt2M) {
        // 用于计算当次选择的图片数量
        this.state.newUploadArr.push(file)
        this.setState({
          newUploadArr: this.state.newUploadArr
        })
      }
      return isJPG && isLt2M;
    }
  }

  // 删除绑定的图片
  async onRemove(info) {
    const { orderNo, bindId, sign, deleteApi } = this.props
    if (!deleteApi) {
      return
    }
    let name = info.response.data
    let remove = new Promise(function (resolve, reject) {
      Modal.confirm({
        title: '操作确认',
        content: '是否确认删除？',
        okText: '确定',
        cancelText: '取消',
        onOk() {
          $.ajax({
            method: "post",
            dataType: "json",
            crossDomain: false,
            url: globalConfig.context + deleteApi,
            data: {
              id: bindId, // 编号 （没有不用传）
              orderNo, // 绑定的订单号
              sign,
              fileName: name
            }
          }).done(function (data) {
            if (!data.error.length) {
              resolve(true);
            } else {

            };
          }.bind(this));
        },
        onCancel() {
          resolve(false)
        },
      })
    });
    return await remove;
  }

  componentWillUnmount() {
    this.setTimeOutObj && clearTimeout(this.setTimeOutObj);
  }

  render() {
    const { fileList } = this.props;
    if (!fileList || !Array.isArray(fileList)) {
      return null;
    }
    return (
      <div className='ImgListComponent'>
        <div className='ImgList'>
          <Spin spinning={Object.keys(this.props.uploadConfig).length !== 0 ? false : (fileList.length === 0 ? false : this.state.loading)} tip="文件加载中...">
            <Upload
              {...this.props.uploadConfig}
              accept={this.props.accept || "image/*,application/pdf"}
              className={Object.keys(this.props.uploadConfig).length !== 0 ? "" : "demandDetailShow-upload"}
              listType={this.props.accept ? this.props.uploadConfig.listType : "picture-card"}
              fileList={
                Object.keys(this.props.uploadConfig).length !== 0 ?
                  (
                    fileList.map((v, i) => {
                      v.index = i;
                      v.url = v.url;
                      v.thumbUrl = v.name.substr(v.name.lastIndexOf(".") + 1) == "pdf" ? pdfimg : v.url
                      return v
                    })
                  ) : (
                    this.state.seeMore ?
                      fileList.map((v, i) => {
                        v.index = i;
                        v.url = v.url;
                        v.thumbUrl = v.name.substr(v.name.lastIndexOf(".") + 1) == "pdf" ? pdfimg : v.url
                        return v
                      }) :
                      fileList.map((v, i) => {
                        v.index = i;
                        v.url = v.url;
                        v.thumbUrl = v.name.substr(v.name.lastIndexOf(".") + 1) == "pdf" ? pdfimg : v.url
                        return v
                      }).slice(0, 10)
                  )
              }
              onPreview={(file) => {
                let types = file.name.substr(file.name.lastIndexOf(".") + 1)
                if (!!file.type && file.type.split('/')[0] == "application" || types == "pdf") {
                  let url = file.response.data.indexOf("/upload") == -1
                    ? globalConfig.avatarHost + "/upload" + file.response.data
                    : file.response.data
                  // this.setState({
                  //   isPDF: true,
                  //   file: url,
                  // })
                  window.open(url)
                } else {
                  if (Object.keys(this.props.uploadConfig).length !== 0) {
                    //TODO 上传组件,查看图片临时解决方法,无法查看下一张
                    let image = new Image();
                    image.src = file.url || file.thumbUrl;
                    let viewer = new Viewer(image, {
                      hidden: function () {
                        viewer.destroy();
                      },
                    });
                    viewer.show();
                  } else {
                    this.state.gallery.view(file.index).show();
                  }
                }
              }}
              beforeUpload={this.beforeUpload}
              onChange={(infor) => {
                if (infor.file.status) {
                  let newUploadNum = this.state.newUploadArr.length
                  this.state.gallery && this.state.gallery.destroy();
                  this.props.onChange(infor);
                  if (infor.file && infor.file.status === 'error') {
                    message.error('上传失败,请重新上传!');
                  }
                  //用于控制进度条
                  if (infor.file && infor.file.status !== 'removed' && infor.event) {
                    let percent = 0;
                    this.state.newUploadInforArr[infor.file.uid] = infor.event.percent;
                    this.setState({
                      newUploadInforArr: this.state.newUploadInforArr
                    })
                    for (let i of Object.values(this.state.newUploadInforArr)) {
                      percent += i
                    }
                    let percentNum = percent / newUploadNum / 100;
                    this.setState({
                      percent: percentNum
                    })
                    if (percentNum <= 1) {
                      this.setState({
                        uploadLoading: true,
                      })
                    }
                    if (percentNum >= 1) {
                      this.setState({
                        percent: 1,
                      }, () => {
                        setTimeout(() => {
                          this.setState({
                            uploadLoading: false,
                          }, () => {
                            this.setState({
                              percent: 0,
                              newUploadArr: [],
                              newUploadInforArr: {}
                            })
                          })
                        }, 1500)
                      })
                    }
                  } else if (infor.file && infor.file.status === 'removed') {
                    this.setState({
                      percent: 0,
                      newUploadArr: [],
                      newUploadInforArr: {}
                    })
                  }
                }
              }}
              onRemove={this.onRemove}
            >
              {Object.keys(this.props.uploadConfig).length === 0 ? "" : uploadButton}
            </Upload>
          </Spin>
        </div>
        {fileList.length > 10 && Object.keys(this.props.uploadConfig).length === 0
          ? <div className='seeMore' onClick={() => { this.setState({ seeMore: !this.state.seeMore }) }}>
            {this.state.seeMore ? '收起' : '查看更多'}
          </div>
          : <div />}
        <ul id={this.props.domId} style={{ display: 'none', zIndex: -1, }}>
          {
            fileList.map((value, index) => (
              <li key={index}>
                <img src={value.name.substr(value.name.lastIndexOf(".") + 1) == "pdf" ? pdfimg : (value.url || value.thumbUrl)} onLoad={() => {
                  this.imgLoading();
                }} />
              </li>
            ))
          }
        </ul>
        {this.state.uploadLoading ? <div className='mask'>
          <Progress
            className='progress'
            type="circle"
            status="active"
            percent={parseFloat(this.state.percent * 100).toFixed(0)}
          />

          <div className='promptText'>文件上传中...</div>
        </div> : <div />}
        {
          // PDF文件预览弹窗
          this.state.isPDF &&
          <Modal
            // maskClosable={false}
            wrapClassName={"pdfmodal"}
            visible={this.state.isPDF}
            className="admin-desc-content"
            footer=""
            title=""
            width="1200px"
            onCancel={() => {
              this.setState({
                isPDF: false,
                file: "",
              })
            }}
          >
            <embed src={this.state.file} type="application/pdf" style={{ width: "100%", height: 700 }} />
            <div className='no'></div>
          </Modal>
        }
      </div>
    )
  }
}

ImgList.propTypes = {
  domId: PropTypes.string,                            //如果一个界面有多个该组件,需要传入自定义id名称,用于图片列表显示
  fileList: PropTypes.array.isRequired,                //图片文件列表
  uploadConfig: PropTypes.object,                      //上传图片配置参数(需要上传图片时需要,存在与否,用于区分是否为上传或者为查看)
  onChange: PropTypes.func,                            //选择图片
}

ImgList.defaultProps = {
  domId: 'images',
  fileList: [],
  uploadConfig: {},
  onChange: () => { }
}

export default ImgList;