import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import classNamesBind from 'classnames/bind';
import ThemeContext from 'terra-theme-context';
import Button from 'terra-button';
import * as KeyCode from 'keycode-js';
import IconSearch from 'terra-icon/lib/icon/IconSearch';
import { injectIntl } from 'react-intl';
import styles from './SearchField.module.scss';

const cx = classNamesBind.bind(styles);

const Icon = <IconSearch />;

const propTypes = {
  /**
   * The defaultValue of the search field. Use this to create an uncontrolled search field.
   */
  defaultValue: PropTypes.string,

  /**
   * When true, will disable the auto-search.
   */
  disableAutoSearch: PropTypes.bool,

  /**
   * Group name value for search group elements. This value is also used as Label name. Default value Search is being used when no value is provided.
   */
  groupName: PropTypes.string,

  /**
   * Callback ref to pass into the inner input component.
   */
  inputRefCallback: PropTypes.func,

  /**
   * Custom input attributes to apply to the input field such as aria-label.
   */
  // eslint-disable-next-line react/forbid-prop-types
  inputAttributes: PropTypes.object,

  /**
   * @private
   * The intl object containing translations. This is retrieved from the context automatically by injectIntl.
   */
  intl: PropTypes.shape({ formatMessage: PropTypes.func }).isRequired,

  /**
   * Whether or not the field should display as a block.
   */
  isBlock: PropTypes.bool,

  /**
   * When true, will disable the field.
   */
  isDisabled: PropTypes.bool,

  /**
   * Whether or not the label is visible. Use this prop to include a label above the search field. The label will be same as groupName prop value.
   */
  isLabelVisible: PropTypes.bool,
  /**
   * The minimum number of characters to perform a search.
   */
  minimumSearchTextLength: PropTypes.number,

  /**
   * Function to trigger when user changes the input value. Provide a function to create a controlled input.
   */
  onChange: PropTypes.func,

  /**
   * Function to trigger when user inputs a value. Use when programmatically setting a value. Sends parameter {Event} event.
   */
  onInput: PropTypes.func,

  /**
   * A callback to indicate an invalid search. Sends parameter {String} searchText.
   */
  onInvalidSearch: PropTypes.func,

  /**
   * A callback to perform search. Sends parameter {String} searchText.
   */
  onSearch: PropTypes.func,

  /**
   * Placeholder text to show while the search field is empty.
   */
  placeholder: PropTypes.string,

  /**
   * How long the component should wait (in milliseconds) after input before performing an automatic search.
   */
  searchDelay: PropTypes.number,

  /**
   * The value of search field.  Use this to create a controlled search field.
   */
  value: PropTypes.string,
};

const defaultProps = {
  defaultValue: undefined,
  disableAutoSearch: false,
  groupName: 'Search',
  isBlock: false,
  isDisabled: false,
  isLabelVisible: false,
  minimumSearchTextLength: 2,
  placeholder: '',
  searchDelay: 2500,
  value: undefined,
  inputAttributes: undefined,
};

class SearchField extends React.Component {
  constructor(props) {
    super(props);

    this.handleClear = this.handleClear.bind(this);
    this.handleTextChange = this.handleTextChange.bind(this);
    this.handleSearch = this.handleSearch.bind(this);
    this.handleKeyDown = this.handleKeyDown.bind(this);
    this.handleInput = this.handleInput.bind(this);
    this.setInputRef = this.setInputRef.bind(this);
    this.updateSearchText = this.updateSearchText.bind(this);

    this.searchTimeout = null;
    this.searchText = this.props.defaultValue || this.props.value;

    this.searchBtnRef = React.createRef();
  }

  componentDidUpdate() {
    // if consumer updates the value prop with onChange, need to update variable to match
    this.updateSearchText(this.props.value);
  }

  componentWillUnmount() {
    this.clearSearchTimeout();
  }

  handleClear(event) {
    // Pass along changes to consuming components using associated props
    if (this.props.onChange) {
      this.props.onChange(event, '');
    }

    if (this.props.onInvalidSearch) {
      this.props.onInvalidSearch('');
    }
    this.updateSearchText('');

    // Clear input field
    if (this.inputRef) {
      this.inputRef.value = '';
      this.inputRef.focus();
    }
  }

  handleTextChange(event) {
    const textValue = event.target.value;
    this.updateSearchText(textValue);

    if (this.props.onChange) {
      this.props.onChange(event, textValue);
    }

    if (!this.props.disableAutoSearch) {
      this.clearSearchTimeout();
      this.searchTimeout = setTimeout(this.handleSearch, this.props.searchDelay);
    }
  }

  handleInput(event) {
    const textValue = event.target.value;
    this.updateSearchText(textValue);

    if (this.props.onInput) {
      this.props.onInput(event);
    }
  }

  handleKeyDown(event) {
    if (event.nativeEvent.keyCode === KeyCode.KEY_RETURN) {
      event.preventDefault();
      // set focus to search button to hide keyboard on mobile devices
      this.searchBtnRef.current.focus();

      this.handleSearch();
    }
    if (event.nativeEvent.keyCode === KeyCode.KEY_ESCAPE) {
      this.handleClear(event);
    }
  }

  handleSearch() {
    this.clearSearchTimeout();

    const searchText = this.searchText || '';

    if (searchText.length >= this.props.minimumSearchTextLength && this.props.onSearch) {
      this.props.onSearch(searchText);
    } else if (this.props.onInvalidSearch) {
      this.props.onInvalidSearch(searchText);
    }
  }

  setInputRef(node) {
    this.inputRef = node;
    if (this.props.inputRefCallback) {
      this.props.inputRefCallback(node);
    }
  }

  updateSearchText(searchText) {
    if (typeof searchText !== 'undefined' && searchText !== this.searchText) {
      this.searchText = searchText;
      // Forcing update for clearButton rerender.
      this.forceUpdate();
    }
  }

  clearSearchTimeout() {
    if (this.searchTimeout) {
      clearTimeout(this.searchTimeout);
      this.searchTimeout = null;
    }
  }

  render() {
    const {
      defaultValue,
      disableAutoSearch,
      groupName,
      inputRefCallback,
      inputAttributes,
      intl,
      isBlock,
      isDisabled,
      isLabelVisible,
      minimumSearchTextLength,
      onChange,
      onInput,
      onInvalidSearch,
      onSearch,
      placeholder,
      searchDelay,
      value,
      ...customProps
    } = this.props;

    const theme = this.context;

    const searchContainerClassNames = cx([
      'search-container',
      theme.className,
    ]);

    const searchFieldClassNames = classNames(
      cx(
        'search-field',
        { block: isBlock },
      ),
      customProps.className,
    );

    const groupNameValue = groupName === 'Search' ? intl.formatMessage({ id: 'Terra.searchField.search' }) : groupName;
    const inputAriaLabelText = inputAttributes && Object.prototype.hasOwnProperty.call(inputAttributes, 'aria-label') ? inputAttributes['aria-label'] : groupNameValue;
    const buttonText = intl.formatMessage({ id: 'Terra.searchField.submit-search' });
    const clearText = intl.formatMessage({ id: 'Terra.searchField.clear' });
    const additionalInputAttributes = { ...inputAttributes };
    const clearIcon = <span className={cx('clear-icon')} />;
    const inputClass = classNames(
      cx(
        'input',
      ),
      additionalInputAttributes.className,
    );

    if (value !== undefined) {
      additionalInputAttributes.value = value;
    } else {
      additionalInputAttributes.defaultValue = defaultValue;
    }

    const clearButton = this.searchText && !isDisabled
      ? (
        <Button
          data-terra-search-field-button="Clear"
          className={cx('clear')}
          onClick={this.handleClear}
          text={clearText}
          variant="utility"
          icon={clearIcon}
          isIconOnly
        />
      )
      : undefined;

    return (
      <div className={searchContainerClassNames}>
        {isLabelVisible
        && (
        <label className={cx('label')}>{groupName}</label>
        )}
        <div className={cx('search-role-container')}>
          <div role="group" aria-label={intl.formatMessage({ id: 'Terra.searchField.search' })} {...customProps} className={searchFieldClassNames}>
            <div className={cx('input-group')}>
              <input
                {...additionalInputAttributes}
                className={inputClass}
                type="search"
                placeholder={placeholder}
                onChange={this.handleTextChange}
                disabled={isDisabled}
                aria-label={inputAriaLabelText}
                aria-disabled={isDisabled}
                onKeyDown={this.handleKeyDown}
                onInput={this.handleInput}
                ref={this.setInputRef}
              />
              {clearButton}
            </div>
            <Button
              data-terra-search-field-button="Search"
              className={cx('button')}
              text={buttonText}
              onClick={this.handleSearch}
              isDisabled={isDisabled}
              icon={Icon}
              isIconOnly
              isCompact
              refCallback={(ref) => { this.searchBtnRef.current = ref; }}
            />
          </div>
        </div>
      </div>
    );
  }
}

SearchField.propTypes = propTypes;
SearchField.defaultProps = defaultProps;
SearchField.contextType = ThemeContext;

export default injectIntl(SearchField);