package user

import (
	"RenewCMS/api/pkg/apperr"
	"RenewCMS/api/pkg/claims"
	"RenewCMS/api/pkg/publicuser"
	validator "RenewCMS/api/pkg/validator"
	"RenewCMS/internal/domain/user"
	"RenewCMS/internal/infrastructure/useCases"
	"encoding/json"
	"errors"
	"net/http"
)

type Handler struct {
	UpdateProfileUseCase *useCases.UpdateUserProfileUseCase
}

type UpdateProfileRequest struct {
	DisplayName *string `json:"display_name" validate:"required"`
}

func NewHandler(updateProfile *useCases.UpdateUserProfileUseCase) *Handler {
	return &Handler{
		UpdateProfileUseCase: updateProfile,
	}
}

func (h *Handler) UpdateMe(w http.ResponseWriter, r *http.Request) {
	var request UpdateProfileRequest
	err := json.NewDecoder(r.Body).Decode(&request)
	if err != nil {
		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
		return
	}

	err = validator.Validate.Struct(request)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	userId, ok := claims.UserId(r)
	if !ok {
		http.Error(w, apperr.UnauthorizedErrorMessage, http.StatusUnauthorized)
		return
	}

	updatedUser, err := h.UpdateProfileUseCase.UpdateDisplayName(userId, *request.DisplayName)
	if err != nil {
		if errors.Is(err, user.ErrInvalidDisplayName) {
			http.Error(w, apperr.DisplayNameErrorMessage, http.StatusBadRequest)
			return
		}
		if errors.Is(err, user.ErrUserNotFound) {
			http.Error(w, apperr.UnauthorizedErrorMessage, http.StatusUnauthorized)
			return
		}
		http.Error(w, "Internal server error", http.StatusInternalServerError)
		return
	}

	body, err := json.Marshal(publicuser.New(updatedUser))
	if err != nil {
		http.Error(w, "Internal server error", http.StatusInternalServerError)
		return
	}
	w.Header().Set("Cache-Control", "no-store")
	_, _ = w.Write(body)
}