import React from 'react';
import createClass from 'create-react-class';
import PropTypes from 'prop-types';
import keycode from 'keycode';
import Formsy from 'formsy-react';
import TextField from 'material-ui/TextField';
import { setMuiComponentAndMaybeFocus, debounce } from './utils';

const FormsyText = createClass({

  propTypes: {
    convertValue: PropTypes.func,
    defaultValue: PropTypes.any,
    name: PropTypes.string.isRequired,
    onBlur: PropTypes.func,
    onChange: PropTypes.func,
    onKeyDown: PropTypes.func,
    requiredError: PropTypes.string,
    underlineFocusStyle: PropTypes.object,
    underlineStyle: PropTypes.object,
    updateImmediately: PropTypes.bool,
    validationColor: PropTypes.string,
    validationError: PropTypes.string,
    validationErrors: PropTypes.object,
    validations: PropTypes.oneOfType([PropTypes.string, PropTypes.object]),
    value: PropTypes.any,
  },

  mixins: [Formsy.Mixin],

  getDefaultProps() {
    return {
      underlineFocusStyle: {},
      underlineStyle: {},
      validationColor: '#4CAF50',
    };
  },

  getInitialState() {
    const value = this.controlledValue();
    return { value };
  },

  componentWillMount() {
    this.setValue(this.controlledValue());
  },

  componentWillReceiveProps(nextProps) {
    const isValueChanging = nextProps.value !== this.props.value;
    if (isValueChanging || nextProps.defaultValue !== this.props.defaultValue) {
      const value = this.controlledValue(nextProps);
      const isValid = this.isValidValue(value);

      if (isValueChanging || this.props.defaultValue === this.getValue()) {
        this.setState({ value, isValid });
        if (this.getValue() !== value) this.setValue(value);
      }
    }
  },

  componentWillUpdate(nextProps, nextState) {
    if (nextState._isPristine && // eslint-disable-line no-underscore-dangle
      nextState._isPristine !== this.state._isPristine) { // eslint-disable-line no-underscore-dangle
      // Calling state here is valid, as it cannot cause infinite recursion.
      const value = this.controlledValue(nextProps);
      const isValid = this.isValidValue(value);
      this.setValue(value);
      this.setState({ value, isValid });
    }
  },

  controlledValue(props = this.props) {
    return props.value || props.defaultValue || this.convertValue('');
  },

  handleBlur(event) {
    this.setValue(this.convertValue(event.currentTarget.value));
    delete this.changeValue;
    if (this.props.onBlur) this.props.onBlur(event);
  },

  handleChange(event) {
    // Update the value (and so display any error) after a timeout.
    if (this.props.updateImmediately) {
      if (!this.changeValue) {
        this.changeValue = debounce(this.setValue, 400);
      }
      this.changeValue(this.convertValue(event.currentTarget.value));
    } else {
      // If there was an error (on loss of focus) update on each keypress to resolve same.
      if (this.getErrorMessage() != null) {
        this.setValue(this.convertValue(event.currentTarget.value));
      } else {
        // Only update on valid values, so as to not generate an error until focus is lost.
        if (this.isValidValue(event.target.value)) {
          this.setValue(this.convertValue(event.currentTarget.value));
          // If it becomes invalid, and there isn't an error message, invalidate without error.
        }
      }
    }

    // Controlled component
    this.setState({ value: event.currentTarget.value, isValid: this.isValidValue(event.currentTarget.value) });
    if (this.props.onChange) this.props.onChange(event, event.currentTarget.value);
  },

  handleKeyDown(event) {
    if (keycode(event) === 'enter') this.setValue(this.convertValue(event.currentTarget.value));
    if (this.props.onKeyDown) this.props.onKeyDown(event, event.currentTarget.value);
  },

  convertValue(value) {
    if (this.props.convertValue) {
      return this.props.convertValue(value);
    } else {
      return value;
    }
  },

  setMuiComponentAndMaybeFocus: setMuiComponentAndMaybeFocus,

  render() {
    const {
      defaultValue, // eslint-disable-line no-unused-vars
      convertValue, // eslint-disable-line no-unused-vars
      requiredError,
      underlineFocusStyle,
      underlineStyle,
      updateImmediately, // eslint-disable-line no-unused-vars
      validations, // eslint-disable-line no-unused-vars
      validationError, // eslint-disable-line no-unused-vars
      validationErrors, // eslint-disable-line no-unused-vars
      value, // eslint-disable-line no-unused-vars
      validationColor,
      ...rest } = this.props;

    const { isRequired, isPristine, isValid, isFormSubmitted } = this;
    const isRequiredError = isRequired() && !isPristine() && !isValid() && isFormSubmitted() && requiredError;
    const errorText = this.getErrorMessage() || isRequiredError;

    return (
      <TextField
        disabled={this.isFormDisabled()}
        {...rest}
        errorText={errorText}
        onBlur={this.handleBlur}
        onChange={this.handleChange}
        onKeyDown={this.handleKeyDown}
        ref={this.setMuiComponentAndMaybeFocus}
        value={this.state.value}
        underlineStyle={this.state.isValid ? { borderColor: validationColor } : underlineStyle}
        underlineFocusStyle={this.state.isValid ? { borderColor: validationColor } : underlineFocusStyle}
      />
    );
  },
});

export default FormsyText;