// Symbols for the Property Registery:
const _registeredDispatcherMethods_ = Symbol('_registeredDispatcherMethods_');
const _registeredDispatcherParams_ = Symbol('_registeredDispatcherParams_');

// Interfaces for the Class
export interface IExportToDispatcherParameters {
}

export interface IExportMethodToDispatcherParameters {
  url?: string,
}

export interface IExportPropertyToDispatcherParameters {
  url?: string,
  readonly?: boolean
}

export const unicorn = {
  test: []
}

/**
 * Decorator used to export a Class API over openAPI
 * @param options 
 */
export function exportsElementsToDispatcher(options: IExportToDispatcherParameters) {
  return function <T extends { new(...args: any[]): {} }>(Base: T) {
    return class extends Base {
      constructor(...args: any[]) {
        super(...args);

        const _this = this as any;

        // extract the Registered Methods of the Class.
        const registeredMethods = Base.prototype[_registeredDispatcherMethods_] as Map<string, IExportMethodToDispatcherParameters>;
        const registeredParams  = Base.prototype[_registeredDispatcherParams_]  as Map<string, IExportPropertyToDispatcherParameters>;

        // Online if they are present, iterate over them
        if (registeredMethods) {
          _this.__dispatcherRegisterdMethods = (cb: (methodName: string, callback: (...args) => Promise<any>, options: IExportMethodToDispatcherParameters) => void) => {
            registeredMethods.forEach((options, methodName) => {
              // Callback the Method
              cb(methodName, async (...args) => _this[methodName](...args), options);
            });
          }
        }

        // Online if they are present, iterate over them
        if (registeredParams) {
          _this.__dispatcherRegisterdParams = (cb: (methodName: string, callback: (...args) => Promise<any>, options: IExportPropertyToDispatcherParameters) => void) => {
            registeredParams.forEach((options, methodName) => {
              // Callback the Method
              cb(methodName, async (...args) => _this[methodName](...args), options);
            });
          }
        }
      }
    };
  }
}

/**
 * Decorator, used to export the Method.
 * @param options 
 */
export function exportMethodToDispatcher(options: IExportMethodToDispatcherParameters = {}) {
  return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
    target[_registeredDispatcherMethods_] = target[_registeredDispatcherMethods_] || new Map<string, IExportMethodToDispatcherParameters>();
    // Here we just add some information that class decorator will use
    target[_registeredDispatcherMethods_].set(propertyKey, options);
  };
}

/**
 * Decorator, will create a POST and GET api for the Parameter.
 * @param options 
 */
export function exportPropertyToDispatcher(options: IExportPropertyToDispatcherParameters = {}) {
  return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
    target[_registeredDispatcherParams_] = target[_registeredDispatcherParams_] || new Map<string, IExportPropertyToDispatcherParameters>();
    // Here we just add some information that class decorator will use
    target[_registeredDispatcherParams_].set(propertyKey, options);
  };
}