package handlers

import (
	"gobeyhan/app/blog/services"
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
)

type CategoryViewHandler struct {
	service *services.CategoryViewService
}

func NewCategoryViewHandler(service *services.CategoryViewService) *CategoryViewHandler {
	return &CategoryViewHandler{service: service}
}

// TrackCategoryView godoc
// @Summary Track a category view
// @Description Record a view event for a category (public endpoint)
// @Tags category-views
// @Accept json
// @Produce json
// @Param id path int true "Category ID"
// @Success 200 {object} map[string]string
// @Router /api/v1/categories/{id}/view [post]
func (h *CategoryViewHandler) TrackCategoryView(c *gin.Context) {
	idStr := c.Param("id")
	categoryID, err := strconv.ParseUint(idStr, 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid category ID"})
		return
	}

	ipAddress := c.ClientIP()
	userAgent := c.Request.UserAgent()

	if err := h.service.TrackCategoryView(categoryID, ipAddress, userAgent); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "View tracked successfully"})
}

// AdminGetAllCategoryViews godoc
// @Summary Get all category views (Admin)
// @Description Get paginated list of all category views
// @Tags admin,category-views
// @Accept json
// @Produce json
// @Security BearerAuth
// @Param page query int false "Page number" default(1)
// @Param limit query int false "Items per page" default(10)
// @Success 200 {object} map[string]interface{}
// @Router /api/v1/admin/category-views [get]
func (h *CategoryViewHandler) AdminGetAllCategoryViews(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "10"))

	if page < 1 {
		page = 1
	}
	if limit < 1 || limit > 100 {
		limit = 10
	}

	views, total, err := h.service.GetAllCategoryViews(page, limit)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"data":  views,
		"total": total,
		"page":  page,
		"limit": limit,
	})
}

// GetCategoryViewStats godoc
// @Summary Get view stats for a category (Admin)
// @Description Get view count and details for a specific category
// @Tags admin,category-views
// @Accept json
// @Produce json
// @Security BearerAuth
// @Param id path int true "Category ID"
// @Success 200 {object} map[string]interface{}
// @Router /api/v1/admin/categories/{id}/views [get]
func (h *CategoryViewHandler) GetCategoryViewStats(c *gin.Context) {
	idStr := c.Param("id")
	categoryID, err := strconv.ParseUint(idStr, 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid category ID"})
		return
	}

	count, err := h.service.GetCategoryViewCount(categoryID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"category_id": categoryID,
		"view_count":  count,
	})
}