import React, { Component } from 'react';
import { Upload, message, Button, Icon, Row, Col, Modal } from 'antd';
import reqwest from 'reqwest';
import { Section } from '../layout';

const props = {
  name: 'file',
  action: '//jsonplaceholder.typicode.com/posts/',
  headers: {
    authorization: 'authorization-text',
  },
  onChange(info) {
    if (info.file.status !== 'uploading') {
      console.log(info.file, info.fileList);
    }
    if (info.file.status === 'done') {
      message.success(`${info.file.name} file uploaded successfully`);
    } else if (info.file.status === 'error') {
      message.error(`${info.file.name} file upload failed.`);
    }
  },
};

function getBase64(img, callback) {
  const reader = new FileReader();
  reader.addEventListener('load', () => callback(reader.result));
  reader.readAsDataURL(img);
}

function beforeUpload(file) {
  const isJPG = file.type === 'image/jpeg';
  if (!isJPG) {
    message.error('You can only upload JPG file!');
  }
  const isLt2M = file.size / 1024 / 1024 < 2;
  if (!isLt2M) {
    message.error('Image must smaller than 2MB!');
  }
  return isJPG && isLt2M;
}

const props2 = {
  action: '//jsonplaceholder.typicode.com/posts/',
  onChange({ file, fileList }) {
    if (file.status !== 'uploading') {
      console.log(file, fileList);
    }
  },
  defaultFileList: [
    {
      uid: 1,
      name: 'xxx.png',
      status: 'done',
      reponse: 'Server Error 500', // custom error message to show
      url: 'http://www.baidu.com/xxx.png',
    },
    {
      uid: 2,
      name: 'yyy.png',
      status: 'done',
      url: 'http://www.baidu.com/yyy.png',
    },
    {
      uid: 3,
      name: 'zzz.png',
      status: 'error',
      reponse: 'Server Error 500', // custom error message to show
      url: 'http://www.baidu.com/zzz.png',
    },
  ],
};

class PicturesWall extends Component {
  state = {
    previewVisible: false,
    previewImage: '',
    fileList: [
      {
        uid: -1,
        name: 'xxx.png',
        status: 'done',
        url:
          'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
      },
    ],
  };

  handleCancel = () => this.setState({ previewVisible: false });

  handlePreview = (file) => {
    this.setState({
      previewImage: file.url || file.thumbUrl,
      previewVisible: true,
    });
  };

  handleChange = ({ fileList }) => this.setState({ fileList });

  render() {
    const { previewVisible, previewImage, fileList } = this.state;
    const uploadButton = (
      <div>
        <Icon type="plus" />
        <div className="ant-upload-text">Upload</div>
      </div>
    );
    return (
      <div className="clearfix">
        <Upload
          action="//jsonplaceholder.typicode.com/posts/"
          listType="picture-card"
          fileList={fileList}
          onPreview={this.handlePreview}
          onChange={this.handleChange}
        >
          {fileList.length >= 3 ? null : uploadButton}
        </Upload>
        <Modal
          visible={previewVisible}
          footer={null}
          onCancel={this.handleCancel}
        >
          <img alt="example" style={{ width: '100%' }} src={previewImage} />
        </Modal>
      </div>
    );
  }
}

class FullCtrlUploadDemo extends React.Component {
  state = {
    fileList: [
      {
        uid: -1,
        name: 'xxx.png',
        status: 'done',
        url: 'http://www.baidu.com/xxx.png',
      },
    ],
  };

  handleChange = (info) => {
    let { fileList } = info;

    // 1. Limit the number of uploaded files
    //    Only to show two recent uploaded files,
    //    and old ones will be replaced by the new
    fileList = fileList.slice(-2);

    // 2. read from response and show file link
    fileList = fileList.map((file) => {
      if (file.response) {
        // Component will show file.url as link
        file.url = file.response.url;
      }
      return file;
    });

    // 3. filter successfully uploaded files according to response from server
    fileList = fileList.filter((file) => {
      if (file.response) {
        return file.response.status === 'success';
      }
      return true;
    });

    this.setState({ fileList });
  };

  render() {
    const props = {
      action: '//jsonplaceholder.typicode.com/posts/',
      onChange: this.handleChange,
      multiple: true,
    };
    return (
      <Upload {...props} fileList={this.state.fileList}>
        <Button>
          <Icon type="upload" /> upload
        </Button>
      </Upload>
    );
  }
}

const { Dragger } = Upload;
const props3 = {
  name: 'file',
  multiple: true,
  action: '//jsonplaceholder.typicode.com/posts/',
  onChange(info) {
    const { status } = info.file;
    if (status !== 'uploading') {
      console.log(info.file, info.fileList);
    }
    if (status === 'done') {
      message.success(`${info.file.name} file uploaded successfully.`);
    } else if (status === 'error') {
      message.error(`${info.file.name} file upload failed.`);
    }
  },
};

class ManualUploadDemo extends Component {
  state = {
    fileList: [],
    uploading: false,
  };

  handleUpload = () => {
    const { fileList } = this.state;
    const formData = new FormData();
    fileList.forEach((file) => {
      formData.append('files[]', file);
    });

    this.setState({
      uploading: true,
    });

    // You can use any AJAX library you like
    reqwest({
      url: '//jsonplaceholder.typicode.com/posts/',
      method: 'post',
      processData: false,
      data: formData,
      success: () => {
        this.setState({
          fileList: [],
          uploading: false,
        });
        message.success('upload successfully.');
      },
      error: () => {
        this.setState({
          uploading: false,
        });
        message.error('upload failed.');
      },
    });
  };

  render() {
    const { uploading } = this.state;
    const props = {
      action: '//jsonplaceholder.typicode.com/posts/',
      onRemove: (file) => {
        this.setState(({ fileList }) => {
          const index = fileList.indexOf(file);
          const newFileList = fileList.slice();
          newFileList.splice(index, 1);
          return {
            fileList: newFileList,
          };
        });
      },
      beforeUpload: (file) => {
        this.setState(({ fileList }) => ({
          fileList: [...fileList, file],
        }));
        return false;
      },
      fileList: this.state.fileList,
    };

    return (
      <div>
        <Upload {...props}>
          <Button>
            <Icon type="upload" /> Select File
          </Button>
        </Upload>
        <Button
          className="upload-demo-start"
          type="primary"
          onClick={this.handleUpload}
          disabled={this.state.fileList.length === 0}
          loading={uploading}
        >
          {uploading ? 'Uploading' : 'Start Upload'}
        </Button>
      </div>
    );
  }
}

export default class UploadDemo extends Component {
  state = {
    loading: false,
    imageUrl: '',
  };

  handleChange = (info) => {
    if (info.file.status === 'uploading') {
      this.setState({ loading: true });
      return;
    }
    if (info.file.status === 'done') {
      // Get this url from response in real world.
      getBase64(info.file.originFileObj, imageUrl =>
        this.setState({
          imageUrl,
          loading: false,
        })
      );
    }
  };

  render() {
    const uploadButton = (
      <div>
        <Icon type={this.state.loading ? 'loading' : 'plus'} />
        <div className="ant-upload-text">Upload</div>
      </div>
    );
    const { imageUrl } = this.state;
    return (
      <Row gutter={16}>
        <Col span={12}>
          <Row>
            <Col span={24}>
              <Section title="点击上传">
                <Upload {...props}>
                  <Button>
                    <Icon type="upload" /> Click to Upload
                  </Button>
                </Upload>
              </Section>
            </Col>
            <Col span={24}>
              <Section title="已上传文件列表">
                <Upload {...props2}>
                  <Button>
                    <Icon type="upload" /> Upload
                  </Button>
                </Upload>
              </Section>
            </Col>
            <Col span={24}>
              <Section title="完全控制的上传列表">
                <FullCtrlUploadDemo />
              </Section>
            </Col>
            <Col span={24}>
              <Section title="图片列表样式">
                <FullCtrlUploadDemo />
              </Section>
            </Col>
          </Row>
        </Col>

        <Col span={12}>
          <Row>
            <Col span={24}>
              <Section title="用户头像">
                <Upload
                  name="avatar"
                  listType="picture-card"
                  className="avatar-uploader"
                  showUploadList={false}
                  action="//jsonplaceholder.typicode.com/posts/"
                  beforeUpload={beforeUpload}
                  onChange={this.handleChange}
                >
                  {imageUrl ? <img src={imageUrl} alt="" /> : uploadButton}
                </Upload>
              </Section>
            </Col>
            <Col span={24}>
              <Section title="照片墙">
                <PicturesWall />
              </Section>
            </Col>
            <Col span={24}>
              <Section title="拖拽上传">
                <Dragger {...props3}>
                  <p className="ant-upload-drag-icon">
                    <Icon type="inbox" />
                  </p>
                  <p className="ant-upload-text">
                    Click or drag file to this area to upload
                  </p>
                  <p className="ant-upload-hint">
                    Support for a single or bulk upload. Strictly prohibit from
                    uploading company data or other band files
                  </p>
                </Dragger>
              </Section>
            </Col>
            <Col span={24}>
              <Section title="手动上传">
                <ManualUploadDemo />
              </Section>
            </Col>
          </Row>
        </Col>
      </Row>
    );
  }
}