package handler

import (
	"strconv"

	"with_you/internal/pkg/response"
	"with_you/internal/service"

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

// AdminDashboardHandler 管理端仪表盘处理器
type AdminDashboardHandler struct {
	dashboardService service.AdminDashboardService
}

// NewAdminDashboardHandler 创建管理端仪表盘处理器
func NewAdminDashboardHandler(dashboardService service.AdminDashboardService) *AdminDashboardHandler {
	return &AdminDashboardHandler{
		dashboardService: dashboardService,
	}
}

// GetStats 获取统计数据
// GET /api/v1/admin/dashboard/stats
func (h *AdminDashboardHandler) GetStats(c *gin.Context) {
	stats, err := h.dashboardService.GetStats(c.Request.Context())
	if err != nil {
		response.InternalServerError(c, "failed to get dashboard stats")
		return
	}

	response.Success(c, stats)
}

// GetUserActivityTrend 获取用户活跃度趋势
// GET /api/v1/admin/dashboard/user-activity
func (h *AdminDashboardHandler) GetUserActivityTrend(c *gin.Context) {
	// 解析天数参数，默认7天，限制在1-30天
	days, _ := strconv.Atoi(c.DefaultQuery("days", "7"))
	days = min(max(days, 1), 30)

	trend, err := h.dashboardService.GetUserActivityTrend(c.Request.Context(), days)
	if err != nil {
		response.InternalServerError(c, "failed to get user activity trend")
		return
	}

	response.Success(c, trend)
}

// GetContentStats 获取内容统计
// GET /api/v1/admin/dashboard/content-stats
func (h *AdminDashboardHandler) GetContentStats(c *gin.Context) {
	stats, err := h.dashboardService.GetContentStats(c.Request.Context())
	if err != nil {
		response.InternalServerError(c, "failed to get content stats")
		return
	}

	response.Success(c, stats)
}

// GetPendingContent 获取待审核内容
// GET /api/v1/admin/dashboard/pending-content
func (h *AdminDashboardHandler) GetPendingContent(c *gin.Context) {
	// 解析limit参数，默认10条，限制在1-50条
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "10"))
	limit = min(max(limit, 1), 50)

	content, err := h.dashboardService.GetPendingContent(c.Request.Context(), limit)
	if err != nil {
		response.InternalServerError(c, "failed to get pending content")
		return
	}

	response.Success(c, content)
}

// GetOnlineUsers 获取在线用户数
// GET /api/v1/admin/dashboard/online-users
func (h *AdminDashboardHandler) GetOnlineUsers(c *gin.Context) {
	onlineUsers, err := h.dashboardService.GetOnlineUsers(c.Request.Context())
	if err != nil {
		response.InternalServerError(c, "failed to get online users count")
		return
	}

	response.Success(c, onlineUsers)
}