import React from "react";
import styles from "./index.less";
import { Transfer, Button } 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 => {
    this.setState({ targetKeys });
  };

  renderFooter = () => (
    <Button
      size="small"
      style={{ float: "right", margin: 5 }}
      onClick={this.getMock}
    >
      reload
    </Button>
  );

  render() {
    return (
      <Transfer
        dataSource={this.state.mockData}
        showSearch
        listStyle={{
          width: 250,
          height: 300
        }}
        operations={["to right", "to left"]}
        targetKeys={this.state.targetKeys}
        onChange={this.handleChange}
        render={item => `${item.title}-${item.description}`}
        footer={this.renderFooter}
      />
    );
  }
}

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