package controllers

import (
	"encoding/json"

	"GoMembership/internal/models"
	"GoMembership/internal/services"

	// "github.com/gorilla/mux"
	"net/http"
	// "strconv"
	"GoMembership/internal/utils"
	"GoMembership/pkg/logger"
)

type UserController struct {
	service            services.UserService
	emailService       services.EmailService
	consentService     services.ConsentService
	bankAccountService services.BankAccountService
	membershipService  services.MembershipService
}

type RegistrationData struct {
	User        models.User        `json:"user"`
	BankAccount models.BankAccount `json:"bank_account"`
	Membership  models.Membership  `json:"membership"`
}

func NewUserController(service services.UserService, emailService *services.EmailService, consentService services.ConsentService, bankAccountService services.BankAccountService, membershipService services.MembershipService) *UserController {
	return &UserController{service, *emailService, consentService, bankAccountService, membershipService}
}

func (uc *UserController) RegisterUser(w http.ResponseWriter, r *http.Request) {
	rh := utils.NewResponseHandler(w)

	var regData RegistrationData

	if err := json.NewDecoder(r.Body).Decode(&regData); err != nil {
		// http.Error(w, err.Error(), http.StatusBadRequest)
		logger.Error.Printf("Couldn't decode Userdata: %v", err)
		rh.RespondWithError(http.StatusBadRequest, "Couldn't decode userdata")
		return
	}
	logger.Info.Printf("registering user: %v", regData.User)

	// Register User
	id, token, err := uc.service.RegisterUser(&regData.User)
	if err != nil {
		// http.Error(w, err.Error(), http.StatusInternalServerError)
		logger.Error.Printf("Couldn't register User: %v", err)
		rh.RespondWithError(http.StatusInternalServerError, "Couldn't register User")
		return
	}
	regData.User.ID = id

	// Register Bank Account
	_, err = uc.bankAccountService.RegisterBankAccount(&regData.BankAccount)
	if err != nil {
		logger.Error.Printf("Couldn't register bank account: %v", err)
		rh.RespondWithError(http.StatusInternalServerError, "Couldn't register User-BankAccount")
		return
	}

	// Register Consents
	var consents = [2]models.Consent{
		{
			FirstName:   regData.User.FirstName,
			LastName:    regData.User.LastName,
			Email:       regData.User.Email,
			ConsentType: "TermsOfService",
		},
		{
			FirstName:   regData.User.FirstName,
			LastName:    regData.User.LastName,
			Email:       regData.User.Email,
			ConsentType: "Privacy",
		},
	}
	for _, consent := range consents {
		_, err = uc.consentService.RegisterConsent(&consent)
		if err != nil {
			logger.Error.Printf("Couldn't register consent: %v", err)
			rh.RespondWithError(http.StatusInternalServerError, "Couldn't register User-consent")
			return
		}
	}

	// Register Membership
	_, err = uc.membershipService.RegisterMembership(&regData.Membership)
	if err != nil {
		logger.Error.Printf("Couldn't register membership: %v", err)
		rh.RespondWithError(http.StatusInternalServerError, "Couldn't register User-membership")
		return
	}

	// Send notifications
	if err := uc.emailService.SendVerificationEmail(&regData.User, &token); err != nil {
		logger.Error.Printf("Failed to send email verification email to user: %v", err)
		// rh.RespondWithError(http.StatusServiceUnavailable, "User creation succeeded, but failed to send welcome email to user")
	}
	// Notify admin of new user registration
	if err := uc.emailService.NotifyAdminOfNewUser(&regData.User); err != nil {
		logger.Error.Printf("Failed to notify admin of new user registration: %v", err)
		// rh.RespondWithError(http.StatusServiceUnavailable, "User creation succeeded, but failed to notify admin of new user registration")
	}
	rh.RespondWithJSON(http.StatusCreated, map[string]interface{}{
		"status": "success",
		"id":     regData.User.ID,
	})
}

func (uc *UserController) VerifyMailHandler(w http.ResponseWriter, r *http.Request) {
	rh := utils.NewResponseHandler(w)

	token := r.URL.Query().Get("token")
	if token == "" {
		logger.Error.Println("Missing token to verify mail")
		rh.RespondWithError(http.StatusNoContent, "Missing token")
		return
	}

	user, err := uc.service.VerifyUser(&token)
	if err != nil {
		logger.Error.Printf("Cannot verify user: %v", err)
		rh.RespondWithError(http.StatusUnauthorized, "Cannot verify user")
	}

	membership, err := uc.membershipService.FindMembershipByUserID(user.ID)
	if err != nil {
		logger.Error.Printf("Cannot get membership of user %v: %v", user.ID, err)
		rh.RespondWithError(http.StatusInternalServerError, "Cannot get Membership of user")
	}
	uc.emailService.SendWelcomeEmail(user, membership)
}

/* func (uc *UserController) LoginUser(w http.ResponseWriter, r *http.Request) {
	var credentials struct {
		Email    string `json:"email"`
		Password string `json:"password"`
	}
	user, err := uc.service.AuthenticateUser(credentials.Email, credentials.Password)
	if err != nil {
		http.Error(w, err.Error(), http.StatusUnauthorized)
		return
	}
	json.NewEncoder(w).Encode(user)
}
*/
/* func (uc *UserController) GetUserID(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	id, err := strconv.Atoi(vars["id"])
	if err != nil {
		http.Error(w, "Invalid user ID", http.StatusBadRequest)
		return
	}
	user, err := uc.service.GetUserByID(id)
	if err != nil {
		http.Error(w, "User not found: "+err.Error(), http.StatusNotFound)
	}
} */