import React from "react";
import styles from "./index.less";
import { Transfer } from "antd";

class App extends React.Component {
  state = {
    mockData: [],
    targetKeys: []
  };

  componentDidMount() {
    this.getMock();
  }

  getMock = () => {
    const targetKeys = [];
    const mockData = [];
    for (let i = 0; i < 20; i++) {
      const data = {
        key: i.toString(),
        title: `content${i + 1}`,
        description: `description of content${i + 1}`,
        chosen: Math.random() * 2 > 1
      };
      if (data.chosen) {
        targetKeys.push(data.key);
      }
      mockData.push(data);
    }
    this.setState({ mockData, targetKeys });
  };

  handleChange = (targetKeys, direction, moveKeys) => {
    console.log(targetKeys, direction, moveKeys);
    this.setState({ targetKeys });
  };

  renderItem = item => {
    const customLabel = (
      <span className="custom-item">
        {item.title} - {item.description}
      </span>
    );

    return {
      label: customLabel, // for displayed item
      value: item.title // for title and filter matching
    };
  };

  render() {
    return (
      <Transfer
        dataSource={this.state.mockData}
        listStyle={{
          width: 300,
          height: 300
        }}
        targetKeys={this.state.targetKeys}
        onChange={this.handleChange}
        render={this.renderItem}
      />
    );
  }
}

export default () => (
  <div className={styles.container}>
    <div id="components-transfer-demo-custom-item">
      <App />
    </div>
  </div>
);