package services

import (
	"gobeyhan/database"
	"gobeyhan/database/models"
)

type CategoryViewService struct{}

func NewCategoryViewService() *CategoryViewService {
	return &CategoryViewService{}
}

// TrackCategoryView records a category view
func (s *CategoryViewService) TrackCategoryView(categoryID uint64, ipAddress, userAgent string) error {
	view := &models.CategoryView{
		CategoryID: categoryID,
		IPAddress:  ipAddress,
		UserAgent:  userAgent,
	}
	return database.DB.Create(view).Error
}

// GetCategoryViewCount gets total view count for a category
func (s *CategoryViewService) GetCategoryViewCount(categoryID uint64) (int64, error) {
	var count int64
	err := database.DB.Model(&models.CategoryView{}).
		Where("category_id = ?", categoryID).
		Count(&count).Error
	return count, err
}

// GetAllCategoryViews gets all views for a category with pagination
func (s *CategoryViewService) GetAllCategoryViews(page, limit int) ([]models.CategoryView, int64, error) {
	var views []models.CategoryView
	var total int64

	query := database.DB.Preload("Category")

	query.Model(&models.CategoryView{}).Count(&total)

	err := query.
		Offset((page - 1) * limit).
		Limit(limit).
		Order("created_at DESC").
		Find(&views).Error

	return views, total, err
}

// GetViewsByCategory gets views for a specific category
func (s *CategoryViewService) GetViewsByCategory(categoryID uint64, page, limit int) ([]models.CategoryView, int64, error) {
	var views []models.CategoryView
	var total int64

	query := database.DB.Where("category_id = ?", categoryID)

	query.Model(&models.CategoryView{}).Count(&total)

	err := query.
		Offset((page - 1) * limit).
		Limit(limit).
		Order("created_at DESC").
		Find(&views).Error

	return views, total, err
}