import { useState, type CSSProperties } from "react";
import {
  CalendarCheck2,
  ChevronLeft,
  ChevronRight,
  CircleHelp,
  MessageCircle,
  Trophy,
} from "lucide-react";
import Image from "next/image";
import { Button } from "@/components/ui/button";
import { ActivityBadgePaths } from "@/components/profile/ActivityBadgePaths";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Progress } from "@/components/ui/progress";
import {
  getGamificationBadgeImagePath,
  rankLevels,
} from "@/lib/gamification-badges";
import { Link } from "@/lib/router";
import type { GamificationSummarySchema } from "@/lib/types";
import { formatNumberPersian } from "@/lib/utils";

function ScoreBreakdown({
  icon: Icon,
  label,
  points,
}: {
  icon: typeof CalendarCheck2;
  label: string;
  points: number;
}) {
  return (
    <div className="flex min-w-0 items-center justify-between gap-3 rounded-xl border border-border/70 bg-muted/20 px-4 py-3">
      <div className="flex min-w-0 items-center gap-2 text-sm text-muted-foreground">
        <Icon className="h-4 w-4 shrink-0 text-primary" aria-hidden="true" />
        <span>{label}</span>
      </div>
      <span className="shrink-0 font-semibold text-foreground">{formatNumberPersian(points)}</span>
    </div>
  );
}

export function GamificationCard({
  summary,
  isLoading,
  isError,
  onRetry,
}: {
  summary?: GamificationSummarySchema;
  isLoading: boolean;
  isError: boolean;
  onRetry: () => void;
}) {
  const [selectedRankIndex, setSelectedRankIndex] = useState<number | null>(null);

  if (isLoading) {
    return (
      <Card className="border-border/70 shadow-sm">
        <CardContent className="space-y-4 p-6" aria-busy="true" aria-label="در حال دریافت رتبه و نشان‌ها">
          <div className="h-6 w-40 animate-pulse rounded bg-muted" />
          <div className="h-10 w-full animate-pulse rounded bg-muted" />
          <div className="grid gap-3 sm:grid-cols-2"><div className="h-12 animate-pulse rounded bg-muted" /><div className="h-12 animate-pulse rounded bg-muted" /></div>
        </CardContent>
      </Card>
    );
  }

  if (isError || !summary) {
    return (
      <Card className="border-border/70 shadow-sm">
        <CardContent className="flex flex-col items-start gap-3 p-6 text-right sm:flex-row sm:items-center sm:justify-between">
          <div>
            <p className="font-semibold">رتبه و نشان‌ها بارگذاری نشد</p>
            <p className="mt-1 text-sm text-muted-foreground">برای دریافت دوباره اطلاعات تلاش کنید.</p>
          </div>
          <Button type="button" variant="outline" onClick={onRetry}>تلاش دوباره</Button>
        </CardContent>
      </Card>
    );
  }

  const currentRankIndex = Math.max(rankLevels.findIndex((level) => level.id === summary.current_level.id), 0);
  const nextRankIndex = summary.next_level
    ? rankLevels.findIndex((level) => level.id === summary.next_level?.id)
    : -1;
  const defaultRankIndex = nextRankIndex >= 0 ? nextRankIndex : currentRankIndex;
  const visibleRankIndex = Math.min(selectedRankIndex ?? defaultRankIndex, rankLevels.length - 1);
  const visibleRank = rankLevels[visibleRankIndex];
  const visibleRankImage = getGamificationBadgeImagePath(visibleRank.badgeId);
  const visibleRankPointTarget = visibleRank.minimumPoints;
  const visibleRankPoints = Math.min(Math.max(summary.points_total, 0), visibleRankPointTarget);
  const nextLevelPointTarget = summary.next_level?.minimum_points ?? 0;
  const nextLevelProgressPercent = nextLevelPointTarget > 0
    ? Math.min(Math.max((summary.points_total / nextLevelPointTarget) * 100, 0), 100)
    : 100;
  const earnedBadgeIds = new Set(summary.badges.map((badge) => badge.id));
  const visibleRankIsEarned = earnedBadgeIds.has(visibleRank.badgeId);
  const visibleRankIsNextLevel = summary.next_level?.id === visibleRank.id;

  return (
    <Card className="border-border/70 shadow-sm">
      <CardHeader className="flex flex-row items-start justify-between gap-3 text-right">
        <div className="space-y-1">
          <CardTitle className="text-xl">دستاوردهای من</CardTitle>
          <CardDescription>وضعیت نشان‌ها و جوایز شما بر اساس فعالیت‌ها و مشارکت‌ها در انجمن</CardDescription>
        </div>
        <Button asChild type="button" variant="outline" size="icon" className="h-10 w-10 shrink-0" aria-label="راهنمای رتبه‌بندی و نشان‌ها">
          <Link to="/rank-guide" target="_blank" rel="noopener noreferrer" title="بازکردن راهنما در زبانه جدید">
            <CircleHelp className="h-5 w-5" aria-hidden="true" />
          </Link>
        </Button>
      </CardHeader>
      <CardContent className="space-y-5">
        <div className="rounded-2xl bg-transparent p-3 sm:p-4">
          <div dir="ltr" className="relative min-h-32">
            <div dir="ltr" className="flex min-h-32 items-center gap-2">
              <Button
                type="button"
                variant="ghost"
                size="icon"
                className="h-9 w-9 shrink-0 text-muted-foreground hover:text-foreground"
                aria-label="سطح بعدی"
                disabled={visibleRankIndex === rankLevels.length - 1}
                onClick={() => setSelectedRankIndex(visibleRankIndex + 1)}
              >
                <ChevronLeft className="h-4 w-4" aria-hidden="true" />
              </Button>
              <div dir="ltr" className="relative flex min-h-32 min-w-0 flex-1 items-center justify-end">
                <div dir="ltr" className="flex min-w-0 items-start justify-end gap-2 sm:gap-4">
                  <div dir="rtl" className="min-w-0 pt-1 text-right">
                    <p className={`mt-1 text-xl font-bold sm:text-2xl ${visibleRankIsEarned ? "text-foreground" : "text-muted-foreground"}`}>
                      {visibleRank.label}
                    </p>
                    <p className="mt-1 inline-flex items-center gap-1.5 text-sm font-medium text-muted-foreground">
                      <span>{formatNumberPersian(visibleRankPoints).replace(/,/g, "")} از {formatNumberPersian(visibleRankPointTarget).replace(/,/g, "")} امتیاز</span>
                      <Trophy className="h-4 w-4 shrink-0 text-current" aria-hidden="true" />
                    </p>
                  </div>
                  {visibleRankImage ? (
                    visibleRankIsNextLevel && !visibleRankIsEarned ? (
                      <div
                        key={`${visibleRank.id}-${nextLevelProgressPercent}`}
                        className="relative h-32 w-32 shrink-0"
                        style={{ "--rank-badge-reveal-top": `${100 - nextLevelProgressPercent}%` } as CSSProperties}
                      >
                        <Image
                          src={visibleRankImage}
                          alt=""
                          width={144}
                          height={144}
                          sizes="128px"
                          className="absolute inset-0 h-full w-full object-contain grayscale"
                        />
                        <Image
                          src={visibleRankImage}
                          alt=""
                          width={144}
                          height={144}
                          sizes="128px"
                          className="rank-badge-color-fill absolute inset-0 h-full w-full object-contain"
                        />
                      </div>
                    ) : (
                      <Image
                        src={visibleRankImage}
                        alt=""
                        width={144}
                        height={144}
                        sizes="128px"
                        className={`h-32 w-32 shrink-0 object-contain ${visibleRankIsEarned ? "" : "grayscale opacity-50"}`}
                      />
                    )
                  ) : null}
                </div>
              </div>
              <Button
                type="button"
                variant="ghost"
                size="icon"
                className="h-9 w-9 shrink-0 text-muted-foreground hover:text-foreground"
                aria-label="سطح قبلی"
                disabled={visibleRankIndex === 0}
                onClick={() => setSelectedRankIndex(visibleRankIndex - 1)}
              >
                <ChevronRight className="h-4 w-4" aria-hidden="true" />
              </Button>
            </div>
          </div>
          <div className="mt-4 space-y-2 px-10 pt-3">
            {summary.next_level ? (
              <p dir="rtl" className="text-left text-xs font-medium text-muted-foreground">
                {formatNumberPersian(summary.points_to_next)} امتیاز تا رسیدن به «{summary.next_level.label}»
              </p>
            ) : (
              <p dir="rtl" className="text-left text-xs font-medium text-muted-foreground">بالاترین سطح را دریافت کرده‌اید.</p>
            )}
            <Progress
              dir="rtl"
              value={nextLevelProgressPercent}
              aria-label={summary.next_level ? `پیشرفت تا سطح ${summary.next_level.label}` : "بالاترین سطح دریافت شده"}
              aria-valuetext={summary.next_level
                ? `${formatNumberPersian(summary.points_total)} امتیاز، ${formatNumberPersian(summary.points_to_next)} امتیاز تا سطح ${summary.next_level.label}`
                : "بالاترین سطح دریافت شده"}
              className="h-2.5 min-w-0 flex-1 bg-muted"
            />
          </div>
        </div>

        <div className="grid gap-3 sm:grid-cols-2">
          <ScoreBreakdown icon={CalendarCheck2} label="رویدادها" points={summary.points_event} />
          <ScoreBreakdown icon={MessageCircle} label="بلاگ" points={summary.points_blog} />
        </div>

        <div className="border-t border-border/70 pt-4">
          <ActivityBadgePaths badges={summary.badges} />
        </div>
      </CardContent>
    </Card>
  );
}