package rest

import (
	"encoding/json"
	"log"
	"net/http"
	"strconv"

	"github.com/google/uuid"
	"uvok.de/go/training_fellow/registration"
	mylog "uvok.de/go/training_fellow/registration/log"
)

type RegistrationHandler struct {
	Service *registration.RegistrationService
}

// adapter to have multiple methods without repeating type
// (I have to implement ServeHTTP)
func HandleRegistration(handler *RegistrationHandler) http.Handler {
	regHandler := func(w http.ResponseWriter, r *http.Request) {
		handleRegistration(handler, w, r)
	}
	return http.HandlerFunc(regHandler)
}

func HandleGetRegistrations(handler *RegistrationHandler) http.Handler {
	getRegs := func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet {
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}
		regs, err := handler.Service.GetUnconfirmedRegistrations()
		if err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			return
		}
		content, err := json.Marshal(regs)
		if err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			return
		}
		w.Write(content)
	}
	return http.HandlerFunc(getRegs)
}

func handleRegistration(handler *RegistrationHandler, rw http.ResponseWriter, req *http.Request) {

	//bodyReader := http.MaxBytesReader(rw, req.Body, 10)
	//defer bodyReader.Close()
	defer req.Body.Close()

	if req.Method != http.MethodPost {
		rw.WriteHeader(http.StatusMethodNotAllowed)
		return
	}

	err := req.ParseForm()
	if err != nil {
		rw.WriteHeader(http.StatusNotAcceptable)
		mylog.LogError.Printf("Form Parse: %v\n", err)
		return
	}
	newRegistration := registration.Registration{}

	newRegistration.Company = req.Form.Get("company")
	newRegistration.Date = req.Form.Get("date")
	newRegistration.Email = req.Form.Get("email")
	newRegistration.FirstName = req.Form.Get("first_name")
	newRegistration.LastName = req.Form.Get("last_name")
	newRegistration.TrainingCode = req.Form.Get("training_code")
	val, err := strconv.ParseBool(req.Form.Get("privacy_acc"))
	newRegistration.PrivacyPolicyAccepted = false
	newRegistration.Confirmed = false
	newRegistration.RegId = uuid.NewString()

	if err != nil {
		mylog.LogWarning.Printf("Form Parse Bool: %v\n", err)
	} else {
		newRegistration.PrivacyPolicyAccepted = val
	}

	log.Printf("New registration: %v", newRegistration)
	if handler.Service != nil {
		err = handler.Service.HandleNewRegistration(&newRegistration)
		if err != nil {
			rw.WriteHeader(http.StatusInternalServerError)
			mylog.LogError.Printf("Error submitting the following registration: %v. Error: %v", newRegistration, err)
			return
		}
	}
	rw.WriteHeader(http.StatusCreated)
}