import React, { PropTypes, Component } from 'react';
import Formsy from 'formsy-react';
import FRC from 'formsy-react-components';

import DateTime from './DateTime.jsx';

import Utils from './utils.js';

const Checkbox = FRC.Checkbox;
// const CheckboxGroup = FRC.CheckboxGroup;
const Input = FRC.Input;
const RadioGroup = FRC.RadioGroup;
const Select = FRC.Select;
const Textarea = FRC.Textarea;

class FormComponent extends Component {

  constructor(props) {
    super(props);
    this.handleBlur = this.handleBlur.bind(this);
  }

  handleBlur() {
    // see https://facebook.github.io/react/docs/more-about-refs.html
    if (this.formControl !== null) {
      this.props.updateCurrentValue(this.props.name, this.formControl.getValue());
    }
  }

  renderComponent() {

    // see https://facebook.github.io/react/warnings/unknown-prop.html
    const { control, group, updateCurrentValue, document, ...rest } = this.props;

    const base = this.props.control === "function" ? this.props : rest;

    const properties = {
      ...base,
      onBlur: this.handleBlur,
      ref: (ref) => this.formControl = ref
    };

    // if control is a React component, use it
    if (typeof this.props.control === "function") {

      return <this.props.control {...properties} document={document} />

    } else { // else pick a predefined component

      switch (this.props.control) {
        case "text":
          return <Input         {...properties} type="text" />;
        case "textarea":
          return <Textarea      {...properties} />;
        case "checkbox":
          return <Checkbox      {...properties} />;        
        // note: checkboxgroup cause React refs error
        case "checkboxgroup":
          return <CheckboxGroup  {...properties} />;
        case "radiogroup":
          return <RadioGroup    {...properties} />;
        case "select":
          return <Select        {...properties} />;
        case "datetime":
          return <DateTime      {...properties} />;
        default: 
          return <Input         {...properties} type="text" />;
      }

    }
  }

  render() {
    return (
      <div className={"input-"+this.props.name}>
        {this.props.beforeComponent ? this.props.beforeComponent : null}
        {this.renderComponent()}
        {this.props.afterComponent ? this.props.afterComponent : null}
      </div>
    )
  }

}

FormComponent.propTypes = {
  document: React.PropTypes.object,
  name: React.PropTypes.string,
  label: React.PropTypes.string,
  value: React.PropTypes.any,
  placeholder: React.PropTypes.string,
  prefilledValue: React.PropTypes.any, 
  options: React.PropTypes.any,
  control: React.PropTypes.any,
  datatype: React.PropTypes.any,
  disabled: React.PropTypes.bool,
  updateCurrentValue: React.PropTypes.func
}

export default FormComponent;

//-------------------------------------//

// having the CheckboxGroup component in this file prevents a weird bug

import ComponentMixin from './component';
import Row from './row';

const CheckboxGroup = React.createClass({

    mixins: [Formsy.Mixin, ComponentMixin],

    propTypes: {
        name: React.PropTypes.string.isRequired,
        options: React.PropTypes.array.isRequired
    },

    getDefaultProps: function() {
        return {
            label: '',
            help: null
        };
    },

    changeCheckbox: function() {
        var value = [];
        this.props.options.forEach(function(option, key) {
            if (this.refs['element-' + key].checked) {
                value.push(option.value);
            }

        }.bind(this));
        this.setValue(value);
        this.props.onChange(this.props.name, value);
    },

    renderElement: function() {
        var _this = this;
        var controls = this.props.options.map(function(checkbox, key) {
            var checked = (_this.getValue().indexOf(checkbox.value) !== -1);
            var disabled = _this.isFormDisabled() || checkbox.disabled || _this.props.disabled;
            return (
                <div className="checkbox" key={key}>
                    <label>
                        <input
                            ref={'element-' + key}
                            checked={checked}
                            type="checkbox"
                            value={checkbox.value}
                            onChange={_this.changeCheckbox}
                            disabled={disabled}
                        /> {checkbox.label}
                    </label>
                </div>
            );
        });
        return controls;
    },

    render: function() {

        if (this.getLayout() === 'elementOnly') {
            return (
                <div>{this.renderElement()}</div>
            );
        }

        return (
            <Row
                {...this.getRowProperties()}
                fakeLabel={true}
            >
                {this.renderElement()}
                {this.renderHelp()}
                {this.renderErrorMessage()}
            </Row>
        );
    }
});