import React from "react";
import styles from "./index.less";
import { Upload, message } from "antd";
import { LoadingOutlined, PlusOutlined } from "@ant-design/icons";

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

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

class Avatar extends React.Component {
  state = {
    loading: false
  };

  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>
        {this.state.loading ? <LoadingOutlined /> : <PlusOutlined />}
        <div className="ant-upload-text">Upload</div>
      </div>
    );
    const { imageUrl } = this.state;
    return (
      <Upload
        name="avatar"
        listType="picture-card"
        className="avatar-uploader"
        showUploadList={false}
        action="https://www.mocky.io/v2/5cc8019d300000980a055e76"
        beforeUpload={beforeUpload}
        onChange={this.handleChange}
      >
        {imageUrl ? (
          <img src={imageUrl} alt="avatar" style={{ width: "100%" }} />
        ) : (
          uploadButton
        )}
      </Upload>
    );
  }
}

export default () => (
  <div className={styles.container}>
    <div id="components-upload-demo-avatar">
      <Avatar />
    </div>
  </div>
);