import React from 'react';
import Component from '../component';

export default class Tab extends Component {
  constructor() {
    super();

    this.handleHover = this.handleHover.bind(this);
    this.handleBlur = this.handleBlur.bind(this);
    this.handleClick = this.handleClick.bind(this);

    this.state = {
      hovered: false
    };
  }

  shouldComponentUpdate() {
    return true;
  }

  handleHover() {
    this.setState({
      hovered: true
    });
  }

  handleBlur() {
    this.setState({
      hovered: false
    });
  }

  handleClick(event) {
    const isLeftClick = event.nativeEvent.which === 1;
    const isMiddleClick = event.nativeEvent.which === 2;

    if (isLeftClick && !this.props.isActive) {
      this.props.onSelect();
    } else if (isMiddleClick) {
      this.props.onClose();
    }
  }

  template(css) {
    const {isActive, isFirst, isLast, borderColor, hasActivity} = this.props;
    const {hovered} = this.state;

    return (<li
      onMouseEnter={this.handleHover}
      onMouseLeave={this.handleBlur}
      onClick={this.props.onClick}
      style={{borderColor}}
      className={css(
        'tab',
        isFirst && 'first',
        isActive && 'active',
        isFirst && isActive && 'firstActive',
        hasActivity && 'hasActivity'
      )}
      >
      { this.props.customChildrenBefore }
      <span
        className={css(
          'text',
          isLast && 'textLast',
          isActive && 'textActive'
        )}
        onClick={this.handleClick}
        >
        <span
          title={this.props.text}
          className={css('textInner')}
          >
          { this.props.text }
        </span>
      </span>
      <i
        className={css(
          'icon',
          hovered && 'iconHovered'
        )}
        onClick={this.props.onClose}
        >
        <svg className={css('shape')}>
          <use xlinkHref="./dist/assets/icons.svg#close-tab"/>
        </svg>
      </i>
      { this.props.customChildren }
    </li>);
  }

  styles() {
    return {
      tab: {
        color: '#ccc',
        borderColor: '#ccc',
        borderBottomWidth: 1,
        borderBottomStyle: 'solid',
        borderLeftWidth: 1,
        borderLeftStyle: 'solid',
        listStyleType: 'none',
        flexGrow: 1,
        position: 'relative',
        ':hover': {
          color: '#ccc'
        }
      },

      first: {
        borderLeftWidth: 0,
        paddingLeft: 1
      },

      firstActive: {
        borderLeftWidth: 1,
        paddingLeft: 0
      },

      active: {
        color: '#fff',
        borderBottomWidth: 0,
        ':hover': {
          color: '#fff'
        }
      },

      hasActivity: {
        color: '#50E3C2',
        ':hover': {
          color: '#50E3C2'
        }
      },

      text: {
        transition: 'color .2s ease',
        height: '34px',
        display: 'block',
        width: '100%',
        position: 'relative',
        overflow: 'hidden'
      },

      textInner: {
        position: 'absolute',
        left: '24px',
        right: '24px',
        top: 0,
        bottom: 0,
        textAlign: 'center',
        textOverflow: 'ellipsis',
        whiteSpace: 'nowrap',
        overflow: 'hidden'
      },

      icon: {
        transition: `opacity .2s ease, color .2s ease,
          transform .25s ease, background-color .1s ease`,
        pointerEvents: 'none',
        position: 'absolute',
        right: '7px',
        top: '10px',
        display: 'inline-block',
        width: '14px',
        height: '14px',
        borderRadius: '100%',
        color: '#e9e9e9',
        opacity: 0,
        transform: 'scale(.95)',

        ':hover': {
          backgroundColor: 'rgba(255,255,255, .13)',
          color: '#fff'
        },

        ':active': {
          backgroundColor: 'rgba(255,255,255, .1)',
          color: '#909090'
        }
      },

      iconHovered: {
        opacity: 1,
        transform: 'none',
        pointerEvents: 'all'
      },

      shape: {
        position: 'absolute',
        left: '4px',
        top: '4px',
        width: '6px',
        height: '6px',
        verticalAlign: 'middle',
        fill: 'currentColor',
        shapeRendering: 'crispEdges'
      }
    };
  }

}
