import { Alert, Tab, Tabs } from 'react-bootstrap';
import QueryHistory from './QueryHistory';
import ResultSet from './ResultSet';
import { connect } from 'react-redux';
import { bindActionCreators } from 'redux';
import * as Actions from '../actions';
import React from 'react';
import { areArraysShallowEqual } from '../../reduxUtils';

import shortid from 'shortid';

/*
    editorQueries are queries executed by users passed from SqlEditor component
    dataPrebiewQueries are all queries executed for preview of table data (from SqlEditorLeft)
*/
const propTypes = {
  editorQueries: React.PropTypes.array.isRequired,
  dataPreviewQueries: React.PropTypes.array.isRequired,
  actions: React.PropTypes.object.isRequired,
  activeSouthPaneTab: React.PropTypes.string,
};

const defaultProps = {
  activeSouthPaneTab: 'Results',
};

class SouthPane extends React.PureComponent {
  switchTab(id) {
    this.props.actions.setActiveSouthPaneTab(id);
  }
  shouldComponentUpdate(nextProps) {
    return !areArraysShallowEqual(this.props.editorQueries, nextProps.editorQueries)
      || !areArraysShallowEqual(this.props.dataPreviewQueries, nextProps.dataPreviewQueries)
      || this.props.activeSouthPaneTab !== nextProps.activeSouthPaneTab;
  }
  render() {
    let latestQuery;
    const props = this.props;
    if (props.editorQueries.length > 0) {
      latestQuery = props.editorQueries[props.editorQueries.length - 1];
    }
    let results;
    if (latestQuery) {
      results = (
        <ResultSet showControls search query={latestQuery} actions={props.actions} />
      );
    } else {
      results = <Alert bsStyle="info">Run a query to display results here</Alert>;
    }

    const dataPreviewTabs = props.dataPreviewQueries.map((query) => (
      <Tab
        title={`Preview for ${query.tableName}`}
        eventKey={query.id}
        key={query.id}
      >
        <ResultSet query={query} visualize={false} csv={false} actions={props.actions} cache />
      </Tab>
    ));

    return (
      <div className="SouthPane">
        <Tabs
          bsStyle="tabs"
          id={shortid.generate()}
          activeKey={this.props.activeSouthPaneTab}
          onSelect={this.switchTab.bind(this)}
        >
          <Tab
            title="Results"
            eventKey="Results"
          >
            <div style={{ overflow: 'auto' }}>
              {results}
            </div>
          </Tab>
          <Tab
            title="Query History"
            eventKey="History"
          >
            <QueryHistory queries={props.editorQueries} actions={props.actions} />
          </Tab>
          {dataPreviewTabs}
        </Tabs>
      </div>
    );
  }
}

function mapStateToProps(state) {
  return {
    activeSouthPaneTab: state.activeSouthPaneTab,
  };
}

function mapDispatchToProps(dispatch) {
  return {
    actions: bindActionCreators(Actions, dispatch),
  };
}

SouthPane.propTypes = propTypes;
SouthPane.defaultProps = defaultProps;

export default connect(mapStateToProps, mapDispatchToProps)(SouthPane);