// @flow
import React from "react";
import {translate} from "react-i18next";
import type {User} from "../types/User";
import {Checkbox, InputField} from "../../components/forms";
import {SubmitButton} from "../../components/buttons";

type Props = {
  submitForm: User => void,
  user?: User,
  t: string => string
};

type State = {
  user: User,
  mailValidationError: boolean,
  nameValidationError: boolean,
  displayNameValidationError: boolean,
  passwordValidationError: boolean,
  validatePasswordError: boolean,
  validatePassword: string
};


class UserForm extends React.Component<Props, State> {
  constructor(props: Props) {
    super(props);
    
    this.state = {
      user: {
        name: "",
        displayName: "",
        mail: "",
        password: "",
        admin: false,
        active: false,
        _links: {}
      },
      mailValidationError: false,
      displayNameValidationError: false,
      nameValidationError: false,
      passwordValidationError: false,
      validatePasswordError: false,
      validatePassword: ""
    };
  }

  componentDidMount() {
    this.setState({ user: {...this.props.user} });
  }

  submit = (event: Event) => {
    event.preventDefault();
    this.props.submitForm(this.state.user);
  };

  render() {
    const { t } = this.props;
    const user = this.state.user;
    const ButtonClickable = (this.state.validatePasswordError || this.state.nameValidationError || this.state.mailValidationError || this.state.validatePasswordError
    || this.state.displayNameValidationError || user.name === undefined|| user.displayName === undefined);
    let nameField = null;
    if (!this.props.user) {
      nameField = (
        <InputField
          label={t("user.name")}
          onChange={this.handleUsernameChange}
          value={user ? user.name : ""}
          validationError= {this.state.nameValidationError}
          errorMessage= {t("validation.name-invalid")}
        />
      );
    }
    return (
      <form onSubmit={this.submit}>
        {nameField}
        <InputField
          label={t("user.displayName")}
          onChange={this.handleDisplayNameChange}
          value={user ? user.displayName : ""}
          validationError={this.state.displayNameValidationError}
          errorMessage={t("validation.displayname-invalid")}
        />
        <InputField
          label={t("user.mail")}
          onChange={this.handleEmailChange}
          value={user ? user.mail : ""}
          validationError= {this.state.mailValidationError}
          errorMessage={t("validation.mail-invalid")}
        />
        <InputField
          label={t("user.password")}
          type="password"
          onChange={this.handlePasswordChange}
          value={user ? user.password : ""}
          validationError={this.state.validatePasswordError}
          errorMessage={t("validation.password-invalid")}
        />
        <InputField
          label={t("validation.validatePassword")}
          type="password"
          onChange={this.handlePasswordValidationChange}
          value={this.state ? this.state.validatePassword : ""}
          validationError={this.state.passwordValidationError}
          errorMessage={t("validation.passwordValidation-invalid")}
        />
        <Checkbox
          label={t("user.admin")}
          onChange={this.handleAdminChange}
          checked={user ? user.admin : false}
        />
        <Checkbox
          label={t("user.active")}
          onChange={this.handleActiveChange}
          checked={user ? user.active : false}
        />
        <SubmitButton disabled={ButtonClickable} label={t("user-form.submit")} />
      </form>
    );
  }

  
  handleUsernameChange = (name: string) => {
    const REGEX_NAME = /^[^ ][A-z0-9\\.\-_@ ]*[^ ]$/;
    this.setState(  {nameValidationError: !REGEX_NAME.test(name),  user : {...this.state.user, name} } );
  };

  handleDisplayNameChange = (displayName: string) => {    
    const REGEX_NAME = /^[^ ][A-z0-9\\.\-_@ ]*[^ ]$/;
    this.setState({displayNameValidationError: !REGEX_NAME.test(displayName),  user : {...this.state.user, displayName} } );
  };

  handleEmailChange = (mail: string) => {
    const REGEX_MAIL = /^[A-z0-9][\w.-]*@[A-z0-9][\w\-\\.]*\.[A-z0-9][A-z0-9-]+$/;
    this.setState(  {mailValidationError: !REGEX_MAIL.test(mail),  user : {...this.state.user, mail} } );
  };

  handlePasswordChange = (password: string) => {
    const validatePasswordError = !this.checkPasswords(password, this.state.validatePassword);
    this.setState(  {validatePasswordError: (password.length < 6) || (password.length > 32),  passwordValidationError: validatePasswordError, user : {...this.state.user, password} } );
  };

  handlePasswordValidationChange = (validatePassword: string) => {
    const validatePasswordError = this.checkPasswords(this.state.user.password, validatePassword)
    this.setState({ validatePassword, passwordValidationError: !validatePasswordError });
  };

  checkPasswords = (password1: string, password2: string) => {
    return (password1 === password2);
  }

  handleAdminChange = (admin: boolean) => {
    this.setState({ user : {...this.state.user, admin} });
  };

  handleActiveChange = (active: boolean) => {
    this.setState({ user : {...this.state.user, active} });
  };
}

export default translate("users")(UserForm);