package feetback

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

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

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

type FeedbackHandler struct {
	service FeedbackService
}

func NewFeedbackHandler(service FeedbackService) *FeedbackHandler {
	return &FeedbackHandler{
		service: service,
	}
}

// CreateFeedback создает новый отзыв
func (h *FeedbackHandler) CreateFeedback(w http.ResponseWriter, r *http.Request) {
	var req CreateFeedbackRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	response, err := h.service.Create(r.Context(), &req)
	if err != nil {
		logger.Get().Error("Failed to create feedback", zap.Error(err))
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusCreated)
	json.NewEncoder(w).Encode(response)
}

// GetFeedbackByID возвращает отзыв по ID
func (h *FeedbackHandler) GetFeedbackByID(w http.ResponseWriter, r *http.Request) {
	idStr := chi.URLParam(r, "id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		http.Error(w, "Invalid ID", http.StatusBadRequest)
		return
	}

	response, err := h.service.GetByID(r.Context(), uint(id))
	if err != nil {
		logger.Get().Error("Failed to get feedback", zap.Error(err))
		http.Error(w, err.Error(), http.StatusNotFound)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// UpdateFeedback обновляет существующий отзыв
func (h *FeedbackHandler) UpdateFeedback(w http.ResponseWriter, r *http.Request) {
	idStr := chi.URLParam(r, "id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		http.Error(w, "Invalid ID", http.StatusBadRequest)
		return
	}

	var req UpdateFeedbackRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	response, err := h.service.Update(r.Context(), uint(id), &req)
	if err != nil {
		logger.Get().Error("Failed to update feedback", zap.Error(err))
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// DeleteFeedback удаляет отзыв
func (h *FeedbackHandler) DeleteFeedback(w http.ResponseWriter, r *http.Request) {
	idStr := chi.URLParam(r, "id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		http.Error(w, "Invalid ID", http.StatusBadRequest)
		return
	}

	if err := h.service.Delete(r.Context(), uint(id)); err != nil {
		logger.Get().Error("Failed to delete feedback", zap.Error(err))
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.WriteHeader(http.StatusNoContent)
}

// ListFeedbacks возвращает список отзывов с пагинацией
func (h *FeedbackHandler) ListFeedbacks(w http.ResponseWriter, r *http.Request) {
	page, _ := strconv.Atoi(r.URL.Query().Get("page"))
	pageSize, _ := strconv.Atoi(r.URL.Query().Get("page_size"))
	
	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 {
		pageSize = 10
	}
	if pageSize > 100 {
		pageSize = 100
	}

	response, err := h.service.List(r.Context(), page, pageSize)
	if err != nil {
		logger.Get().Error("Failed to list feedbacks", zap.Error(err))
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// GetMyFeedbacks возвращает отзывы текущего пользователя
func (h *FeedbackHandler) GetMyFeedbacks(w http.ResponseWriter, r *http.Request) {
	userID, ok := middleware.GetUserID(r.Context())
	if !ok {
		http.Error(w, "Unauthorized", http.StatusUnauthorized)
		return
	}
	
	page, _ := strconv.Atoi(r.URL.Query().Get("page"))
	pageSize, _ := strconv.Atoi(r.URL.Query().Get("page_size"))
	
	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 {
		pageSize = 10
	}
	if pageSize > 100 {
		pageSize = 100
	}

	response, err := h.service.ListByOwner(r.Context(), userID, page, pageSize)
	if err != nil {
		logger.Get().Error("Failed to get user feedbacks", zap.Error(err))
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// GetFeedbacksByObject возвращает отзывы по объекту
func (h *FeedbackHandler) GetFeedbacksByObject(w http.ResponseWriter, r *http.Request) {
	objectIDStr := chi.URLParam(r, "objectID")
	objectID, err := strconv.ParseUint(objectIDStr, 10, 32)
	if err != nil {
		http.Error(w, "Invalid object ID", http.StatusBadRequest)
		return
	}

	page, _ := strconv.Atoi(r.URL.Query().Get("page"))
	pageSize, _ := strconv.Atoi(r.URL.Query().Get("page_size"))
	
	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 {
		pageSize = 10
	}
	if pageSize > 100 {
		pageSize = 100
	}

	response, err := h.service.ListByObject(r.Context(), uint(objectID), page, pageSize)
	if err != nil {
		logger.Get().Error("Failed to get object feedbacks", zap.Error(err))
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// GetFeedbacksByPlatform возвращает отзывы по платформе
func (h *FeedbackHandler) GetFeedbacksByPlatform(w http.ResponseWriter, r *http.Request) {
	platformStr := chi.URLParam(r, "platform")
	platform := models.PlatformType(platformStr)

	page, _ := strconv.Atoi(r.URL.Query().Get("page"))
	pageSize, _ := strconv.Atoi(r.URL.Query().Get("page_size"))
	
	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 {
		pageSize = 10
	}
	if pageSize > 100 {
		pageSize = 100
	}

	response, err := h.service.ListByPlatform(r.Context(), platform, page, pageSize)
	if err != nil {
		logger.Get().Error("Failed to get platform feedbacks", zap.Error(err))
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// SearchFeedbacks ищет отзывы по тексту
func (h *FeedbackHandler) SearchFeedbacks(w http.ResponseWriter, r *http.Request) {
	query := r.URL.Query().Get("q")
	if query == "" {
		http.Error(w, "Search query is required", http.StatusBadRequest)
		return
	}

	page, _ := strconv.Atoi(r.URL.Query().Get("page"))
	pageSize, _ := strconv.Atoi(r.URL.Query().Get("page_size"))
	
	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 {
		pageSize = 10
	}
	if pageSize > 100 {
		pageSize = 100
	}

	response, err := h.service.Search(r.Context(), query, page, pageSize)
	if err != nil {
		logger.Get().Error("Failed to search feedbacks", zap.Error(err))
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// GetFeedbackStats возвращает статистику по отзывам
func (h *FeedbackHandler) GetFeedbackStats(w http.ResponseWriter, r *http.Request) {
	stats, err := h.service.GetStats(r.Context())
	if err != nil {
		logger.Get().Error("Failed to get feedback stats", zap.Error(err))
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(stats)
}

// GetFeedbackComments возвращает комментарии к отзыву
func (h *FeedbackHandler) GetFeedbackComments(w http.ResponseWriter, r *http.Request) {
	idStr := chi.URLParam(r, "id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		http.Error(w, "Invalid ID", http.StatusBadRequest)
		return
	}

	page, _ := strconv.Atoi(r.URL.Query().Get("page"))
	pageSize, _ := strconv.Atoi(r.URL.Query().Get("page_size"))
	
	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 {
		pageSize = 10
	}
	if pageSize > 100 {
		pageSize = 100
	}

	comments, total, err := h.service.GetComments(r.Context(), uint(id), page, pageSize)
	if err != nil {
		logger.Get().Error("Failed to get comments", zap.Error(err))
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	response := map[string]interface{}{
		"items":      comments,
		"total":      total,
		"page":       page,
		"page_size":  pageSize,
		"total_pages": int((total + int64(pageSize) - 1) / int64(pageSize)),
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// AddComment добавляет комментарий к отзыву
func (h *FeedbackHandler) AddComment(w http.ResponseWriter, r *http.Request) {
	idStr := chi.URLParam(r, "id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		http.Error(w, "Invalid ID", http.StatusBadRequest)
		return
	}

	var req struct {
		Text string `json:"text" binding:"required"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	comment, err := h.service.AddComment(r.Context(), uint(id), req.Text)
	if err != nil {
		logger.Get().Error("Failed to add comment", zap.Error(err))
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusCreated)
	json.NewEncoder(w).Encode(comment)
}

// UpdateComment обновляет комментарий
func (h *FeedbackHandler) UpdateComment(w http.ResponseWriter, r *http.Request) {
	commentIDStr := chi.URLParam(r, "commentID")
	commentID, err := strconv.ParseUint(commentIDStr, 10, 32)
	if err != nil {
		http.Error(w, "Invalid comment ID", http.StatusBadRequest)
		return
	}

	var req struct {
		Text string `json:"text" binding:"required"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := h.service.UpdateComment(r.Context(), uint(commentID), req.Text); err != nil {
		logger.Get().Error("Failed to update comment", zap.Error(err))
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.WriteHeader(http.StatusOK)
	json.NewEncoder(w).Encode(map[string]string{"message": "Comment updated successfully"})
}

// DeleteComment удаляет комментарий
func (h *FeedbackHandler) DeleteComment(w http.ResponseWriter, r *http.Request) {
	commentIDStr := chi.URLParam(r, "commentID")
	commentID, err := strconv.ParseUint(commentIDStr, 10, 32)
	if err != nil {
		http.Error(w, "Invalid comment ID", http.StatusBadRequest)
		return
	}

	if err := h.service.DeleteComment(r.Context(), uint(commentID)); err != nil {
		logger.Get().Error("Failed to delete comment", zap.Error(err))
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.WriteHeader(http.StatusNoContent)
}