import {ApiRequest} from "@gongt/ts-stl-library/request/protocol";
import {Request, Response} from "express-serve-static-core";
import {ResponseInterface} from "./response-wrapper";

export interface RequestContextCreator<ReqType, ResType> {
	new(req: Request, res: Response): RequestContext<ReqType, ResType>
}

export abstract class RequestContext<ReqType, ResType> {
	protected req: Request;
	protected res: Response;
	
	public readonly response: ResponseInterface<ResType>;
	public readonly params: ReqType&ApiRequest = <any>{};
	
	constructor(req: Request, res: Response) {
		this.req = req;
		this.res = res;
		
		this.response = this.createResponseWrapper();
	}
	
	protected abstract createResponseWrapper(): ResponseInterface<ResType>;
	
	get __dump() {
		return {
			req: this.req,
			res: this.res,
		}
	}
	
	/** @internal */
	get _request_raw() {
		return this.req;
	}
	
	/** @internal */
	get _response_raw() {
		return this.res;
	}
	
	getHeader(key: string) {
		return this.req.headers[key];
	}
	
	get isXhr() {
		return this.req.xhr;
	}
	
	setSession(name: string, value: any) {
		if (!this.req['session']) {
			throw new Error('using session without start it.')
		}
		this.req['session'][name] = value;
	}
}