import React from 'react';
import throttle from 'lodash/throttle'
import {
  SearchBox
} from "searchkit";

import CRUKCustomElasticGetter from '../getter/CRUKCustomElasticGetter';
import CRUKSearchkitAutocompleteList from '../autocomplete/CRUKSearchkitAutocompleteList';

import { isUndefined } from 'lodash';

/**
 * Override the render method on the SearchBox component to alter the markup.
 */
export default class CRUKSearchkitSearchBox extends SearchBox {
  static buildResults = (results) => {
    return results.title_suggest[0].options.map((v) => {
      return v.text;
    });
  }

  static propTypes = {
    autocompleteEnable: React.PropTypes.bool,
    test: React.PropTypes.bool,
    autocompleteItems: React.PropTypes.array,
    ...SearchBox.propTypes
  }

  constructor(props) {
    super(props);

    this.state = {
      clearText: false,
      focused: false,
      autocompleteActive: false,
      input: undefined,
      autocompleteItems: [],
      selectedItem: 0
    };
    this.lastSearchMs = 0;
    this.throttledSearch = throttle(()=> {
      this.searchQuery(this.accessor.getQueryString())
    }, props.searchThrottleTime);

    this.autocompleteToggle = this.autocompleteToggle.bind(this);
    this.inputState = this.inputState.bind(this);
    this.handleSearchButton = this.handleSearchButton.bind(this);
  }

  handleKeyUp(e) {
    if (!this.props.autocompleteEnable) return;
    const { autocompleteItems, selectedItem } = this.state;

    if (this.refs.queryField.value === '') {
      this.setState({ autocompleteActive: false });
      return;
    }

    const self = this;

    if (e.keyCode === 40 || e.keyCode === 38) {
      this.handleAutocompleteItems(e.keyCode);
      return;
    }
    if (this.props.test) return;

    const getter = new CRUKCustomElasticGetter(`${this.searchkit.host}/_suggest`);
    getter.autocompleteRequest(this.refs.queryField.value)
      .then(function (response) {
        self.setState({
          autocompleteItems: CRUKSearchkitSearchBox.buildResults(response.data),
          autocompleteActive: true
        });
      })
      .catch(function (error) {
        console.log(error);
      });
  }

  autocompleteToggle(flag) {
    this.setState({ autocompleteActive: flag });
  }

  inputState(state) {
    this.setState({ input: state });
  }

  handleAutocompleteItems(arrow) {
    let { autocompleteItems, selectedItem } = this.state;

    if (this.props.test) {
      autocompleteItems = this.props.autocompleteItems;
    }

    if (autocompleteItems.length < 1) return;

    const selectedItemIndex = (() => {
      if (arrow === 40) {
        if (selectedItem < autocompleteItems.length) return selectedItem + 1;
        return autocompleteItems.length;
      }
      if (arrow === 38) {
        if (selectedItem > 1) return selectedItem - 1;
        return 1;
      }
      return 0;
    })();

    this.setState({
      selectedItem: selectedItemIndex
    });
  }

  setFocusState(focused) {
    if (!focused){
      const { input } = this.state;
      if (this.props.blurAction === 'search'
        && !isUndefined(input)
        && input != this.getAccessorValue()){
        this.searchQuery(input);
      }
      /**
       * Behave differently if this component has autocomplete enabled, needs
       * to be smarter innit.
       */
      if (this.props.autocompleteEnable) {
        if (!this.state.autocompleteActive) {
          this.setState({ focused });
        }
      } else {
        this.setState({
          focused,
          input: undefined // Flush (should use accessor's state now)
        })
      }
    } else {
      this.setState({ focused });
    }
  }

  handleSearchButton(e) {
    const w = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
    const { clearText } = this.state;
    if (w <= 768 && clearText) {
      e.preventDefault();
      this.setState({ 
        focused: true,
        clearText: false
      }, () => {
        this.refs.queryField.value = '';
      });
      
      this.refs.queryField.focus();
    }
  }

  onSubmit(event) {
    const { autocompleteItems, selectedItem } = this.state;
    event.preventDefault();
    let query = this.getValue();

    if (this.props.autocompleteEnable && selectedItem > 0) {
      query = autocompleteItems[selectedItem - 1];
      this.setState({
        input: query,
        selectedItem: 0,
        autocompleteActive: false
      }, () => {
        this.searchQuery(query);
      });
    }

    /**
     * De-focus the input.
     */
    if (document.activeElement != document.body) {
      document.activeElement.blur();
    }
  }

  componentDidMount() {
    const self = this;

    if (!this.props.test) {
      this.searchkit.addResultsListener((results) => {
        const w = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
        const clearText = w <= 768 ? true : false;
        self.setState({
          input: self.getAccessorValue(),
          clearText
        });
      });
    }
  }

  render() {
    const { focused, selectedItem, clearText } = this.state;
    let { autocompleteItems, autocompleteActive } = this.state;

    let wrapper_class = 'cr-input-group cr-input-group--lg cr-search-input';
    let placeholder = this.props.placeholder || this.translate('searchbox.placeholder');
    if (focused) {
      wrapper_class += ' cr-input-group--focused';
    }

    if (this.props.test && this.props.autocompleteItems) {
      autocompleteItems = this.props.autocompleteItems;
      autocompleteActive = true;
    }

    if (clearText) {
      wrapper_class += ' cr-search-input--closer';
    }
    return <form action="." onSubmit={this.onSubmit.bind(this)}>
      <div className={wrapper_class}>
        <label htmlFor="search-input" id="search-label">{placeholder}</label>
        <input
          type="search"
          data-qa="query"
          id="search-input"
          className="cr-input-group__input cr-search-input__input"
          placeholder={placeholder}
          value={this.getValue()}
          onFocus={this.setFocusState.bind(this, true)}
          onBlur={this.setFocusState.bind(this, false)}
          onKeyUp={this.handleKeyUp.bind(this)}
          ref="queryField"
          autoFocus={this.props.autofocus}
          onChange={this.onChange.bind(this)}
          aria-describedby="search-label"
          autoComplete="off"
          autoCorrect="off"
          tabIndex="1"
        />
        <span className="cr-input-group__button cr-search-input__button">
          <button
            type="submit"
            className="btn"
            aria-label="Submit your search"
            data-qa="submit"
            onClick={this.handleSearchButton}
          >
            <span className="cr-input-group__icon glyphicon glyphicon-search" aria-hidden="true"></span>
          </button>
        </span>
        { this.props.autocompleteEnable &&
          <CRUKSearchkitAutocompleteList
            selectedItem={selectedItem}
            inputState={this.inputState}
            autocompleteActive={autocompleteActive}
            autocompleteItems={autocompleteItems}
            toggle={this.autocompleteToggle}
          />
        }
      </div>
    </form>
  }
}