/**
 * @author Olsi Rrjolli
 * In these class are all decorators defined that we will use for the Controllers
 */

import { httpMethod, controllerMetaKey } from '../constants/constants';
import { IController, IModel } from '../types/index';
import { generateResourceMetaKey } from '../utils/reflectMetadataHelpers';

/**
 * HTTP Controller Marker
 * @param resourcePath
 *  The path to the resource for default
 */
/* tslint:disable:variable-name */
export const Controller = (resourcePath: string = '') => {
  return (target: any) => {
    Reflect.defineMetadata(controllerMetaKey.RESOURCE_KEY, resourcePath, target);
    const resource = Reflect.getOwnMetadata(controllerMetaKey.RESOURCE_KEY, target);
    const metaDataKeys = Reflect.getOwnMetadata(controllerMetaKey.METHODS_KEY, target);
    metaDataKeys.forEach((metaData) => {
      Reflect.defineMetadata(generateResourceMetaKey(metaData.http, resource, metaData.path) , metaData.method, target);
    });
  };
};

/**
 * HTTP POST Marker
 * @param path
 *  The path to the resource for default
 */
export const POST = (path: string = '') => {
  return (target: any, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => {
    const ownMethods = Reflect.getOwnMetadata(controllerMetaKey.METHODS_KEY, target.constructor);
    ownMethods.push({http: httpMethod.POST, path: path, method: propertyKey});
    Reflect.defineMetadata(controllerMetaKey.METHODS_KEY, ownMethods, target.constructor);
  };
};

/**
 * HTTP GET Marker, Decorate the method with the GET Decorator
 * @param path
 *  The path to the resource for default
 */
export const GET =  (path: string = '') => {
  return (target: any, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => {
    const ownMethods = Reflect.getOwnMetadata(controllerMetaKey.METHODS_KEY, target.constructor) || [];
    ownMethods.push({http: httpMethod.GET, path: path, method: propertyKey});
    Reflect.defineMetadata(controllerMetaKey.METHODS_KEY, ownMethods, target.constructor);
  };
};

/**
 * HTTP DELETE Marker
 * @param path
 *  The path to the resource for default
 */
export const DELETE = (path: string = '') => {
  return (target: any, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => {
    const ownMethods = Reflect.getOwnMetadata(controllerMetaKey.METHODS_KEY, target.constructor);
    ownMethods.push({http: httpMethod.DELETE, path: path, method: propertyKey});
    Reflect.defineMetadata(controllerMetaKey.METHODS_KEY, ownMethods, target.constructor);
  };
};

/**
 * HTTP PUT Marker
 * @param path
 *  The path to the resource for default
 */
export const PUT = (path: string = '') => {
  return (target: any, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => {
    const ownMethods = Reflect.getOwnMetadata(controllerMetaKey.METHODS_KEY, target.constructor);
    ownMethods.push({http: httpMethod.PUT, path: path, method: propertyKey});
    Reflect.defineMetadata(controllerMetaKey.METHODS_KEY, ownMethods, target.constructor);
  };
};

/**
 * PathParam Setter/Marker
 * @param pathParam
 *  The path parameter from the Request
 */
export const PathParam = (pathParam: string) => {
  return function(target: IController, propertyKey: string, parameterIndex: number){
    const ownDecorators = Reflect.getOwnMetadata(propertyKey, target, propertyKey) || [];
    ownDecorators.push({paramName: pathParam, index: parameterIndex});
    Reflect.defineMetadata(propertyKey, ownDecorators, target, propertyKey);
  };
};

/**
 * Query Parameter Setter/Marker
 * @param queryParam
 *  The  query parameter from the Request
 */
export const QueryParam = (queryParam: string) => {
  return function(target: IController, propertyKey: string, parameterIndex: number){
    const ownDecorators = Reflect.getOwnMetadata(propertyKey, target, propertyKey) || [];
    ownDecorators.push({queryName: queryParam, index: parameterIndex});
    Reflect.defineMetadata(propertyKey, ownDecorators, target, propertyKey);
  };
};

/**
 * Mapper Decorator
 * @param type
 *    Decorate the Controller with the Model, which should use for the Mapper
 */
export const Model  = <T extends IModel>(model: T)  => {
  return (target: IModel) => {
    Reflect.defineMetadata(controllerMetaKey.MODEL_KEY, model, target);
  };
};