const UrlMutatorPlugin = (system) => ({
  rootInjects: {
    setScheme: (scheme) => {
      const jsonSpec = system.getState().toJSON().spec.json;
      const schemes = Array.isArray(scheme) ? scheme : [scheme];
      const newJsonSpec = Object.assign({}, jsonSpec, { schemes });

      return system.specActions.updateJsonSpec(newJsonSpec);
    },
    setHost: (host) => {
      const jsonSpec = system.getState().toJSON().spec.json;
      const newJsonSpec = Object.assign({}, jsonSpec, { host });

      return system.specActions.updateJsonSpec(newJsonSpec);
    },
    setBasePath: (basePath) => {
      const jsonSpec = system.getState().toJSON().spec.json;
      const newJsonSpec = Object.assign({}, jsonSpec, { basePath });

      return system.specActions.updateJsonSpec(newJsonSpec);
    }
  }
});

window.ui = SwaggerUI({
  dom_id: '#myDomId',
  plugins: [
    UrlMutatorPlugin,
  ],
  onComplete: () => {
    // this will set appropriate data when swagger-ui ready
    window.ui.setScheme('http');
    window.ui.setHost('www.google.com');
    window.ui.setBasePath('v3');
  }   
})