package amenity

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

	"api_yal/internal/logger"
	"api_yal/internal/middleware"

	"github.com/go-chi/chi/v5"
	"github.com/go-playground/validator/v10"
	"go.uber.org/zap"
)

type AmenityHandler struct {
	service   AmenityService
	validator *validator.Validate
}

func NewHandler(service AmenityService) *AmenityHandler {
	return &AmenityHandler{
		service:   service,
		validator: validator.New(),
	}
}

func (h *AmenityHandler) Create(w http.ResponseWriter, r *http.Request) {
	var req CreateAmenityRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}
	if err := h.validator.Struct(req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	resp, err := h.service.Create(&req)
	if err != nil {
		logger.Get().Error("failed to create amenity", zap.Error(err))
		http.Error(w, "Failed to create amenity", http.StatusInternalServerError)
		return
	}
	w.WriteHeader(http.StatusCreated)
	json.NewEncoder(w).Encode(resp)
}

func (h *AmenityHandler) GetByID(w http.ResponseWriter, r *http.Request) {
	id, err := strconv.ParseUint(chi.URLParam(r, "id"), 10, 32)
	if err != nil {
		http.Error(w, "Invalid amenity ID", http.StatusBadRequest)
		return
	}
	resp, err := h.service.GetByID(uint(id))
	if err != nil {
		if errors.Is(err, errors.New("amenity not found")) {
			http.Error(w, err.Error(), http.StatusNotFound)
			return
		}
		http.Error(w, "Failed to get amenity", http.StatusInternalServerError)
		return
	}
	json.NewEncoder(w).Encode(resp)
}

func (h *AmenityHandler) Update(w http.ResponseWriter, r *http.Request) {
	id, err := strconv.ParseUint(chi.URLParam(r, "id"), 10, 32)
	if err != nil {
		http.Error(w, "Invalid amenity ID", http.StatusBadRequest)
		return
	}
	var req UpdateAmenityRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}
	resp, err := h.service.Update(uint(id), &req)
	if err != nil {
		logger.Get().Error("failed to update amenity", zap.Error(err))
		http.Error(w, "Failed to update amenity", http.StatusInternalServerError)
		return
	}
	json.NewEncoder(w).Encode(resp)
}

func (h *AmenityHandler) Delete(w http.ResponseWriter, r *http.Request) {
	id, err := strconv.ParseUint(chi.URLParam(r, "id"), 10, 32)
	if err != nil {
		http.Error(w, "Invalid amenity ID", http.StatusBadRequest)
		return
	}
	if err := h.service.Delete(uint(id)); err != nil {
		logger.Get().Error("failed to delete amenity", zap.Error(err))
		http.Error(w, "Failed to delete amenity", http.StatusInternalServerError)
		return
	}
	w.WriteHeader(http.StatusNoContent)
}

func (h *AmenityHandler) List(w http.ResponseWriter, r *http.Request) {
	category := r.URL.Query().Get("category")
	var resp []AmenityResponse
	var err error
	if category != "" {
		resp, err = h.service.ListByCategory(category)
	} else {
		resp, err = h.service.List()
	}
	if err != nil {
		logger.Get().Error("failed to list amenities", zap.Error(err))
		http.Error(w, "Failed to list amenities", http.StatusInternalServerError)
		return
	}
	if resp == nil {
		resp = []AmenityResponse{}
	}
	json.NewEncoder(w).Encode(resp)
}

func (h *AmenityHandler) GetByObject(w http.ResponseWriter, r *http.Request) {
	objectID, err := strconv.ParseUint(chi.URLParam(r, "objectId"), 10, 32)
	if err != nil {
		http.Error(w, "Invalid object ID", http.StatusBadRequest)
		return
	}
	resp, err := h.service.GetByObject(uint(objectID))
	if err != nil {
		logger.Get().Error("failed to get object amenities", zap.Error(err))
		http.Error(w, "Failed to get object amenities", http.StatusInternalServerError)
		return
	}
	if resp == nil {
		resp = []AmenityResponse{}
	}
	json.NewEncoder(w).Encode(resp)
}

func (h *AmenityHandler) ReplaceObjectAmenities(w http.ResponseWriter, r *http.Request) {
	objectID, err := strconv.ParseUint(chi.URLParam(r, "objectId"), 10, 32)
	if err != nil {
		http.Error(w, "Invalid object ID", http.StatusBadRequest)
		return
	}
	userID, ok := r.Context().Value(middleware.UserIDKey).(uint)
	if !ok {
		http.Error(w, "Unauthorized", http.StatusUnauthorized)
		return
	}
	_ = userID
	var req struct {
		AmenityIDs []uint `json:"amenity_ids"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}
	if err := h.service.ReplaceObjectAmenities(uint(objectID), req.AmenityIDs); err != nil {
		logger.Get().Error("failed to replace object amenities", zap.Error(err))
		http.Error(w, "Failed to replace amenities", http.StatusInternalServerError)
		return
	}
	w.WriteHeader(http.StatusOK)
	json.NewEncoder(w).Encode(map[string]string{"message": "Amenities updated"})
}