/* global grecaptcha */
import React from 'react'; // jshint ignore:line
import FormGroup from 'misago/components/form-group'; // jshint ignore:line

export class BaseCaptcha {
  init(context, ajax, include, snackbar) {
    this._context = context;
    this._ajax = ajax;
    this._include = include;
    this._snackbar = snackbar;
  }
}

export class NoCaptcha extends BaseCaptcha {
  load() {
    return new Promise(function(resolve) {
      // immediately resolve as we don't have anything to validate
      resolve();
    });
  }

  validator() {
    return null;
  }

  component() {
    return null;
  }
}

export class QACaptcha extends BaseCaptcha {
  load() {
    var self = this;
    return new Promise((resolve, reject) => {
      self._ajax.get(self._context.get('CAPTCHA_API')).then(
      function(data) {
        self.question = data.question;
        self.helpText = data.help_text;
        resolve();
      }, function() {
        self._snackbar.error(gettext("Failed to load CAPTCHA."));
        reject();
      });
    });
  }

  validator() {
    return [];
  }

  /* jshint ignore:start */
  component(kwargs) {
    return (
      <FormGroup
        label={this.question}
        for="id_captcha"
        labelClass={kwargs.labelClass || ""}
        controlClass={kwargs.controlClass || ""}
        validation={kwargs.form.state.errors.captcha}
        helpText={this.helpText || null}
      >
        <input
          aria-describedby="id_captcha_status"
          className="form-control"
          disabled={kwargs.form.state.isLoading}
          id="id_captcha"
          onChange={kwargs.form.bindInput('captcha')}
          type="text"
          value={kwargs.form.state.captcha}
        />
      </FormGroup>
    );
  }
  /* jshint ignore:end */
}


export class ReCaptchaComponent extends React.Component {
  componentDidMount() {
    grecaptcha.render('recaptcha', {
      'sitekey': this.props.siteKey,
      'callback': (response) => {
        // fire fakey event to binding
        this.props.binding({
          target: {
            value: response
          }
        });
      }
    });
  }

  render() {
    /* jshint ignore:start */
    return <div id="recaptcha" />;
    /* jshint ignore:end */
  }
}

export class ReCaptcha extends BaseCaptcha {
  load() {
    this._include.include('https://www.google.com/recaptcha/api.js', true);

    return new Promise(function(resolve) {
      var wait = function() {
        if (typeof grecaptcha === "undefined") {
          window.setTimeout(function() {
            wait();
          }, 200);
        } else {
          resolve();
        }
      };
      wait();
    });
  }

  validator() {
    return [];
  }

  /* jshint ignore:start */
  component(kwargs) {
    return (
      <FormGroup
        label={gettext("Please solve the quick test")}
        for="id_captcha"
        labelClass={kwargs.labelClass || ""}
        controlClass={kwargs.controlClass || ""}
        validation={kwargs.form.state.errors.captcha}
        helpText={gettext("This test helps us prevent automated spam registrations on our site.")}
      >
        <ReCaptchaComponent
          binding={kwargs.form.bindInput('captcha')}
          siteKey={this._context.get('SETTINGS').recaptcha_site_key}
        />
      </FormGroup>
    );
  }
  /* jshint ignore:end */
}

export class Captcha {
  init(context, ajax, include, snackbar) {
    switch(context.get('SETTINGS').captcha_type) {
      case 'no':
        this._captcha = new NoCaptcha();
        break;

      case 'qa':
        this._captcha = new QACaptcha();
        break;

      case 're':
        this._captcha = new ReCaptcha();
        break;
    }

    this._captcha.init(context, ajax, include, snackbar);
  }

  // accessors for underlying strategy

  load() {
    return this._captcha.load();
  }

  validator() {
    return this._captcha.validator();
  }

  component(kwargs) {
    return this._captcha.component(kwargs);
  }
}

export default new Captcha();