import React, { Component } from "react";
import PropTypes from "prop-types";
import "./Input.css";

class Input extends Component {
  static propTypes = {
    name: PropTypes.string,
    type: PropTypes.string,
    value: PropTypes.string,
    class: PropTypes.string,
    color: PropTypes.string,
    placeholder: PropTypes.string,
    onChangeInput: PropTypes.func,
    onFocusInput: PropTypes.func
  };

  static defaultProps = {
    name: "",
    type: "text",
    value: "",
    placeholder: "",
    class: "",
    color: "",
    onChangeInput: () => {},
    onFocusInput: () => {}
  };

  state = {
    inputInFocus: false,
    inputValue: this.props.value
  };

  labelClasses = {
    emptyField: "es-label",
    fieldInFocus: "es-input-label",
    fullField: "es-label-full"
  };

  greyBackgroundLabelClasses = {
    emptyField: "es-label grey",
    fieldInFocus: "es-input-label grey",
    fullField: "es-label-full grey"
  };

  static getDerivedStateFromProps = nextProps => ({
    inputValue: nextProps.value
  });

  focusHandler = e => {
    e.preventDefault();

    this.setState({
      inputInFocus: true
    });

    this.props.onFocusInput(e);
  };

  blurHandler = e => {
    e.preventDefault();

    this.setState({
      inputInFocus: false
    });
  };

  onInputValueChangeHandler = e => {
    e.preventDefault();

    this.setState({
      inputValue: e.target.value
    });

    this.props.onChangeInput(e);
  };

  getLabelClass = () => {
    if (this.props.color === "grey") {
      return this.getSerachLabelClass();
    }
    return this.getInputLabelClass();
  };

  getInputLabelClass = () => {
    if (this.isInputFieldInFocus()) {
      return this.labelClasses.fieldInFocus;
    }

    return this.isInputFieldEmpty()
      ? this.labelClasses.emptyField
      : this.labelClasses.fullField;
  };

  getSerachLabelClass = () => {
    if (this.isInputFieldInFocus()) {
      return this.greyBackgroundLabelClasses.fieldInFocus;
    }

    return this.isInputFieldEmpty()
      ? this.greyBackgroundLabelClasses.emptyField
      : this.greyBackgroundLabelClasses.fullField;
  };

  isInputFieldEmpty = () => this.state.inputValue.length === 0;

  isInputFieldInFocus = () => this.state.inputInFocus;

  render() {
    return (
      <div className={`es-input ${this.props.class}`}>
        <input
          type={this.props.type}
          name={this.props.name}
          value={this.state.inputValue}
          onChange={this.onInputValueChangeHandler}
          onFocus={this.focusHandler}
          onBlur={this.blurHandler}
          disabled={this.props.disabled ? "disabled" : ""}
        />
        <label className={this.getLabelClass()} htmlFor="search-field">
          {this.props.placeholder || this.props.name}
        </label>
      </div>
    );
  }
}

export { Input };