import React from 'react';
import StylePropable from '../mixins/style-propable';
import Typography from '../styles/typography';
import getMuiTheme from '../styles/getMuiTheme';

const SubheaderMenuItem = React.createClass({

  propTypes: {
    className: React.PropTypes.string,
    firstChild: React.PropTypes.bool,
    index: React.PropTypes.number.isRequired,
    style: React.PropTypes.object,
    text: React.PropTypes.string.isRequired,
  },

  contextTypes: {
    muiTheme: React.PropTypes.object,
  },

  //for passing default theme context to children
  childContextTypes: {
    muiTheme: React.PropTypes.object,
  },

  mixins: [
    StylePropable,
  ],

  getInitialState() {
    return {
      muiTheme: this.context.muiTheme || getMuiTheme(),
    };
  },

  getChildContext() {
    return {
      muiTheme: this.state.muiTheme,
    };
  },

  //to update theme inside state whenever a new theme is passed down
  //from the parent / owner using context
  componentWillReceiveProps(nextProps, nextContext) {
    let newMuiTheme = nextContext.muiTheme ? nextContext.muiTheme : this.state.muiTheme;
    this.setState({muiTheme: newMuiTheme});
  },

  getTheme() {
    return this.state.muiTheme.menuSubheader;
  },

  getSpacing() {
    return this.state.muiTheme.rawTheme.spacing;
  },

  getStyles() {
    let gutterMini = this.getSpacing().desktopGutterMini;
    let subheaderHeight = this.getSpacing().desktopSubheaderHeight;
    let styles = {
      root: {
        boxSizing: 'border-box',
        fontSize: '13px',
        letterSpacing: 0,
        fontWeight: Typography.fontWeightMedium,
        margin: 0,
        height: subheaderHeight + gutterMini,
        lineHeight: subheaderHeight + 'px',
        color: this.getTheme().textColor,
        borderTop: 'solid 1px ' + this.getTheme().borderColor,
        paddingTop: gutterMini,
        marginTop: gutterMini,
      },
      rootWhenFirstChild: {
        height: subheaderHeight,
        borderTop: 'none',
        paddingTop: 0,
        marginTop: 0,
      },
    };

    return styles;
  },

  render() {
    return (
      <div
        key={this.props.index}
        className={this.props.className}
        style={this.prepareStyles(
          this.getStyles().root,
          this.props.firstChild && this.getStyles().rootWhenFirstChild,
          this.props.style
        )}
      >
        {this.props.text}
      </div>
    );
  },

});

export default SubheaderMenuItem;