import { errorRouter } from '../../src/routes/errorRouter';
import createError from "http-errors";
import { mockHttpContext } from "../helpers/mockHttpContext";

describe("errorRouter", () => {

    beforeEach(() => {
      mockWrite.mockClear();
    });

    test("u slučaju greške 404 mora vratiti string poruku 'page not found'", async () => {
        const err = createError(404)
        const {req,res,next} = mockHttpContext();
  
        await errorRouter(err, req, res, next);
  
        expect(res.status).toHaveBeenCalledWith(404);
        expect(res.setHeader).toHaveBeenCalledWith('Content-Type', "text/html");
        expect(res.end).toHaveBeenCalledWith("page not found");
      });

      test("u slučaju greške 404 mora logirati request, response i tekst greške", async () => {
        const err = createError(404)
        const reqPath = "/neki-path/";
        const {req,res,next} = mockHttpContext({ reqPath });
        
  
        await errorRouter(err, req, res, next);
  
        expect(res.locals.logger.info).toHaveBeenCalledWith("response", "page not found");
        expect(res.locals.logger.error).toHaveBeenCalledWith(err.name, "page "+req.path+" not found");
      });

      test("ako su header-i već poslani, ne smiju biti poslani još jednom", async () => {
        const err = createError(404)
        const {req,res,next} = mockHttpContext({ headersSent:true, writableEnded:true });
  
        await errorRouter(err, req, res, next);
  
        expect(res.status).not.toHaveBeenCalled();
        expect(res.setHeader).not.toHaveBeenCalled();
        expect(res.end).not.toHaveBeenCalled();
      });

      test("ako NIJE već pozvana [end] metoda, treba je pozvati", async () => {
        const err = createError(404)
        const {req,res,next} = mockHttpContext({ headersSent:true, writableEnded:false });
  
        await errorRouter(err, req, res, next);
  
        expect(res.status).not.toHaveBeenCalled();
        expect(res.setHeader).not.toHaveBeenCalled();
        expect(res.end).toHaveBeenCalled();
      });
  
      test("mora zaustaviti Prometheus Timer", async () => {
        const err = createError(404)
        const {req,res,next} = mockHttpContext({ headersSent:true, writableEnded:false });
  
        await errorRouter(err, req, res, next);
  
        expect(res.locals.stopPrometheusTimer).toHaveBeenCalled();
      });

      test("u slučaju greške 500 mora vratiti string poruku 'internal server error'", async () => {
        const err = createError(500)
        const {req,res,next} = mockHttpContext();
  
        await errorRouter(err, req, res, next);
  
        expect(res.status).toHaveBeenCalledWith(500);
        expect(res.setHeader).toHaveBeenCalledWith('Content-Type', "text/html");
        expect(res.end).toHaveBeenCalledWith("internal server error");
      });

      test("u slučaju greške 400 mora vratiti string poruku 'bad request' i logirati grešku", async () => {
        const errorMessage = "mock error text 1";
        const err = createError(400, errorMessage);
        const {req,res,next} = mockHttpContext();
  
        await errorRouter(err, req, res, next);
  
        expect(res.status).toHaveBeenCalledWith(400);
        expect(res.setHeader).toHaveBeenCalledWith('Content-Type', "text/html");
        expect(res.end).toHaveBeenCalledWith("bad request");

        expect(res.locals.logger.errorwrite).toHaveBeenCalledWith(err.name, errorMessage);
      });

      test("u slučaju greške 401 mora vratiti string poruku 'unauthorized' i logirati grešku", async () => {
        const errorMessage = "mock error text 2";
        const err = createError(401, errorMessage)
        const {req,res,next} = mockHttpContext();
  
        await errorRouter(err, req, res, next);
  
        expect(res.status).toHaveBeenCalledWith(401);
        expect(res.setHeader).toHaveBeenCalledWith('Content-Type', "text/html");
        expect(res.end).toHaveBeenCalledWith("unauthorized");

        expect(res.locals.logger.error).toHaveBeenCalledWith(err.name, errorMessage);
      });

      test("u slučaju greške 403 mora vratiti string poruku 'forbidden' i logirati grešku", async () => {
        const errorMessage = "mock error text 3";
        const err = createError(403, errorMessage);
        const {req,res,next} = mockHttpContext();
  
        await errorRouter(err, req, res, next);
  
        expect(res.status).toHaveBeenCalledWith(403);
        expect(res.setHeader).toHaveBeenCalledWith('Content-Type', "text/html");
        expect(res.end).toHaveBeenCalledWith("forbidden");

        expect(res.locals.logger.error).toHaveBeenCalledWith(err.name, errorMessage);
      });
});