var React = require('react');
var StylePropable = require('./mixins/style-propable');
var Transitions = require('./styles/transitions');
var Paper = require('./paper');
var EnhancedSwitch = require('./enhanced-switch');

var Toggle = React.createClass({

  mixins: [StylePropable],

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

  propTypes: {
    elementStyle: React.PropTypes.object,
    onToggle: React.PropTypes.func,
    toggled: React.PropTypes.bool,
    defaultToggled: React.PropTypes.bool
  },

  getInitialState: function() {
    return {
      switched:
        this.props.toggled ||
        this.props.defaultToggled ||
        (this.props.valueLink && this.props.valueLink.value) ||
        false,
    }
  },

  getTheme: function() {
    return this.context.muiTheme.component.toggle;
  },

  getStyles: function() {
    var toggleSize = 20;
    var toggleTrackWidth = 36;
    var styles = {
      icon: {
        padding: '4px 0px 6px 2px'
      },
      track: {
          transition: Transitions.easeOut(),
          width: toggleTrackWidth,
          height: 14,
          borderRadius: 30,
          backgroundColor: this.getTheme().trackOffColor
      },
      thumb: {
        transition: Transitions.easeOut(),
        position: 'absolute',
        top: 1,
        left: 2,
        width: toggleSize,
        height: toggleSize,
        lineHeight: '24px',
        borderRadius: '50%',
        backgroundColor: this.getTheme().thumbOffColor
      },
      trackWhenSwitched: {
        backgroundColor: this.getTheme().trackOnColor
      },
      thumbWhenSwitched: {
        backgroundColor: this.getTheme().thumbOnColor,
        left: 18
      },
      trackWhenDisabled: {
        backgroundColor: this.getTheme().trackDisabledColor
      },
      thumbWhenDisabled: {
        backgroundColor: this.getTheme().thumbDisabledColor
      }
    };
    return styles;
  },

  render: function() {
    var {
      onToggle,
      ...other
    } = this.props;

    var styles = this.getStyles();

    var trackStyles = this.mergeAndPrefix(
      styles.track,
      this.state.switched && styles.trackWhenSwitched,
      this.props.disabled && styles.trackWhenDisabled
    );

    var thumbStyles = this.mergeAndPrefix(
      styles.thumb,
      this.state.switched && styles.thumbWhenSwitched,
      this.props.disabled && styles.thumbWhenDisabled
    );

    var toggleElement = (
      <div style={this.mergeAndPrefix(this.props.elementStyle)}>
        <div style={trackStyles} />
        <Paper style={thumbStyles} circle={true} zDepth={1} />
      </div>
    );

    var customRippleStyle = {
      top: '-10',
      left: '-10'
    };

    var rippleColor =  this.state.switched ?
      this.getTheme().thumbOnColor : this.context.muiTheme.component.textColor;

    var enhancedSwitchProps = {
      ref: "enhancedSwitch",
      inputType: "checkbox",
      switchElement: toggleElement,
      rippleStyle: customRippleStyle,
      rippleColor: rippleColor,
      iconStyle: styles.icon,
      trackStyle: trackStyles,
      thumbStyle: thumbStyles,
      switched: this.state.switched,
      onSwitch: this._handleToggle,
      onParentShouldUpdate: this._handleStateChange,
      defaultSwitched: this.props.defaultToggled,
      labelPosition: (this.props.labelPosition) ? this.props.labelPosition : "left"
    };

    if (this.props.hasOwnProperty('toggled')) enhancedSwitchProps.checked = this.props.toggled;

    return (
      <EnhancedSwitch
        {...other}
        {...enhancedSwitchProps}/>
    );
  },

  isToggled: function() {
    return this.refs.enhancedSwitch.isSwitched();
  },

  setToggled: function(newToggledValue) {
    this.refs.enhancedSwitch.setSwitched(newToggledValue);
  },

  _handleToggle: function(e, isInputChecked) {
    if (this.props.onToggle) this.props.onToggle(e, isInputChecked);
  },

  _handleStateChange: function(newSwitched) {
    this.setState({switched: newSwitched});
  }

});

module.exports = Toggle;