package main

import (
	"encoding/json"
	"io/ioutil"
	"net/http"

	"git.andreafazzi.eu/andrea/probo/client"
	"git.andreafazzi.eu/andrea/probo/logger"
	"git.andreafazzi.eu/andrea/probo/models"
	"git.andreafazzi.eu/andrea/probo/store"
	"github.com/julienschmidt/httprouter"
)

const jsonContentType = "application/json"

type QuizHubCollectorServer struct {
	store store.QuizHubCollectorStore
	http.Handler
}

func NewQuizHubCollectorServer(store store.QuizHubCollectorStore) *QuizHubCollectorServer {
	ps := new(QuizHubCollectorServer)
	ps.store = store

	router := httprouter.New()

	router.GET("/quizzes", httprouter.Handle(ps.readAllQuizzesHandler))
	router.POST("/quizzes/create", httprouter.Handle(ps.createQuizHandler))
	router.POST("/quizzes/:id/update", httprouter.Handle(ps.updateQuizHandler))
	//	router.Handle("/quizzes", logger.WithLogging(http.HandlerFunc(ps.testHandler)))

	ps.Handler = logger.WithLogging(router)

	return ps
}

func (ps *QuizHubCollectorServer) readAllQuizzesHandler(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
	w.Header().Set("content-type", jsonContentType)
	json.NewEncoder(w).Encode(ps.readAllQuizzes(w, r))
}

func (ps *QuizHubCollectorServer) createQuizHandler(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
	response := new(client.Response)

	quiz, err := ps.createQuiz(w, r)
	if err != nil {
		response = &client.Response{Status: "error", Content: err.Error()}
	}

	response = &client.Response{Status: "success", Content: quiz}

	w.WriteHeader(http.StatusAccepted)
	json.NewEncoder(w).Encode(response)
}

func (ps *QuizHubCollectorServer) updateQuizHandler(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
	response := new(client.Response)

	quiz, err := ps.updateQuiz(w, r, params.ByName("id"))
	if err != nil {
		response = &client.Response{Status: "error", Content: err.Error()}
	}

	response = &client.Response{Status: "success", Content: quiz}

	w.WriteHeader(http.StatusAccepted)
	json.NewEncoder(w).Encode(response)
}

func (ps *QuizHubCollectorServer) readAllQuizzes(w http.ResponseWriter, r *http.Request) *client.Response {
	tests, err := ps.store.ReadAllQuizzes()
	if err != nil {
		return &client.Response{Status: "error", Content: err.Error()}
	}
	return &client.Response{Status: "success", Content: tests}
}

func (ps *QuizHubCollectorServer) updateQuiz(w http.ResponseWriter, r *http.Request, id string) (*models.Quiz, error) {
	body, err := ioutil.ReadAll(r.Body)
	if err != nil {
		return nil, err
	}

	updateQuizReq := new(client.UpdateQuizRequest)

	err = json.Unmarshal(body, &updateQuizReq)
	if err != nil {
		return nil, err
	}

	updatedQuiz, err := ps.store.UpdateQuiz(updateQuizReq)
	if err != nil {
		return nil, err
	}

	return updatedQuiz, nil
}

func (ps *QuizHubCollectorServer) createQuiz(w http.ResponseWriter, r *http.Request) (*models.Quiz, error) {
	body, err := ioutil.ReadAll(r.Body)
	if err != nil {
		return nil, err
	}

	createQuizReq := new(client.CreateQuizRequest)

	err = json.Unmarshal(body, &createQuizReq)
	if err != nil {
		return nil, err
	}

	createdQuiz, err := ps.store.CreateQuiz(createQuizReq)
	if err != nil {
		return nil, err
	}

	return createdQuiz, nil
}