import Modal from '../../common/components/Modal';
import Button from '../../common/components/Button';
import Stream from '../../common/utils/Stream';

/**
 * The `ChangeEmailModal` component shows a modal dialog which allows the user
 * to change their email address.
 */
export default class ChangeEmailModal extends Modal {
  oninit(vnode) {
    super.oninit(vnode);

    /**
     * Whether or not the email has been changed successfully.
     *
     * @type {Boolean}
     */
    this.success = false;

    /**
     * The value of the email input.
     *
     * @type {function}
     */
    this.email = Stream(app.session.user.email());

    /**
     * The value of the password input.
     *
     * @type {function}
     */
    this.password = Stream('');
  }

  className() {
    return 'ChangeEmailModal Modal--small';
  }

  title() {
    return app.translator.trans('core.forum.change_email.title');
  }

  content() {
    if (this.success) {
      return (
        <div className="Modal-body">
          <div className="Form Form--centered">
            <p className="helpText">
              {app.translator.trans('core.forum.change_email.confirmation_message', { email: <strong>{this.email()}</strong> })}
            </p>
            <div className="Form-group">
              <Button className="Button Button--primary Button--block" onclick={this.hide.bind(this)}>
                {app.translator.trans('core.forum.change_email.dismiss_button')}
              </Button>
            </div>
          </div>
        </div>
      );
    }

    return (
      <div className="Modal-body">
        <div className="Form Form--centered">
          <div className="Form-group">
            <input
              type="email"
              name="email"
              className="FormControl"
              placeholder={app.session.user.email()}
              bidi={this.email}
              disabled={this.loading}
            />
          </div>
          <div className="Form-group">
            <input
              type="password"
              name="password"
              className="FormControl"
              placeholder={app.translator.trans('core.forum.change_email.confirm_password_placeholder')}
              bidi={this.password}
              disabled={this.loading}
            />
          </div>
          <div className="Form-group">
            {Button.component(
              {
                className: 'Button Button--primary Button--block',
                type: 'submit',
                loading: this.loading,
              },
              app.translator.trans('core.forum.change_email.submit_button')
            )}
          </div>
        </div>
      </div>
    );
  }

  onsubmit(e) {
    e.preventDefault();

    // If the user hasn't actually entered a different email address, we don't
    // need to do anything. Woot!
    if (this.email() === app.session.user.email()) {
      this.hide();
      return;
    }

    this.loading = true;
    this.alertAttrs = null;

    app.session.user
      .save(
        { email: this.email() },
        {
          errorHandler: this.onerror.bind(this),
          meta: { password: this.password() },
        }
      )
      .then(() => {
        this.success = true;
      })
      .catch(() => {})
      .then(this.loaded.bind(this));
  }

  onerror(error) {
    if (error.status === 401) {
      error.alert.content = app.translator.trans('core.forum.change_email.incorrect_password_message');
    }

    super.onerror(error);
  }
}