"use client"

import { BookOpen, Brain, CheckCircle2, Clock, TrendingUp } from "lucide-react"
import { useTranslations } from "next-intl"
import { Card, CardContent } from "@/shared/components/ui/card"
import { cn } from "@/shared/lib/utils"

interface AnalyticsStatsCardsProps {
  totalStudents: number
  studentsWithErrorBook: number
  totalErrorItems: number
  averageMasteryRate: number
  dueReviewCount: number
  /** 涉及的知识点数 */
  knowledgePointCount?: number
  className?: string
}

/**
 * 错题分析统计卡片（教师/管理员视图）
 * 5 个卡片：覆盖学生/错题总数/平均掌握率/待复习/知识点数
 */
export function AnalyticsStatsCards({
  totalStudents,
  studentsWithErrorBook,
  totalErrorItems,
  averageMasteryRate,
  dueReviewCount,
  knowledgePointCount,
  className,
}: AnalyticsStatsCardsProps) {
  const t = useTranslations("errorBook")
  const avg = (totalStudents > 0 ? totalErrorItems / totalStudents : 0).toFixed(1)

  const cards = [
    {
      label: t("analyticsStats.coverage"),
      value: studentsWithErrorBook,
      sub: t("analyticsStats.coverageSub", { total: totalStudents }),
      icon: BookOpen,
      color: "text-blue-600 dark:text-blue-400",
      bg: "bg-blue-50 dark:bg-blue-950/30",
    },
    {
      label: t("analyticsStats.totalErrors"),
      value: totalErrorItems,
      sub: t("analyticsStats.totalErrorsSub", { avg }),
      icon: TrendingUp,
      color: "text-rose-600 dark:text-rose-400",
      bg: "bg-rose-50 dark:bg-rose-950/30",
    },
    {
      label: t("analyticsStats.avgMastery"),
      value: `${Math.round(averageMasteryRate * 100)}%`,
      sub: averageMasteryRate >= 0.6
        ? t("analyticsStats.avgMasteryGood")
        : t("analyticsStats.avgMasteryNeedImprove"),
      icon: CheckCircle2,
      color: "text-emerald-600 dark:text-emerald-400",
      bg: "bg-emerald-50 dark:bg-emerald-950/30",
    },
    {
      label: t("analyticsStats.dueReview"),
      value: dueReviewCount,
      sub: dueReviewCount > 0
        ? t("analyticsStats.dueReviewNeedAttention")
        : t("analyticsStats.dueReviewNone"),
      icon: Clock,
      color: "text-amber-600 dark:text-amber-400",
      bg: "bg-amber-50 dark:bg-amber-950/30",
    },
    {
      label: t("analyticsStats.knowledgePoints"),
      value: knowledgePointCount ?? 0,
      sub: knowledgePointCount && knowledgePointCount > 5
        ? t("analyticsStats.knowledgePointsWide")
        : t("analyticsStats.knowledgePointsFocused"),
      icon: Brain,
      color: "text-purple-600 dark:text-purple-400",
      bg: "bg-purple-50 dark:bg-purple-950/30",
    },
  ]

  return (
    <div className={cn("grid gap-3 sm:grid-cols-2 lg:grid-cols-5", className)}>
      {cards.map((card) => {
        const Icon = card.icon
        return (
          <Card key={card.label} className="overflow-hidden">
            <CardContent className="p-4">
              <div className="flex items-start justify-between">
                <div className="min-w-0 flex-1">
                  <div className="text-xs text-muted-foreground">{card.label}</div>
                  <div className={cn("mt-1 text-2xl font-bold", card.color)}>
                    {card.value}
                  </div>
                  <div className="mt-0.5 text-xs text-muted-foreground">{card.sub}</div>
                </div>
                <div className={cn("rounded-lg p-2", card.bg)}>
                  <Icon className={cn("h-4 w-4", card.color)} />
                </div>
              </div>
            </CardContent>
          </Card>
        )
      })}
    </div>
  )
}
