import { BarChartBig, MousePointerClick } from "lucide-react";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import type { DashboardHoldingItem } from "@/features/dashboard/types/dashboard.types";
import {
  formatCurrency,
  formatPercent,
  getChangeToneClass,
} from "@/features/dashboard/utils/dashboard-format";
import { cn } from "@/lib/utils";

interface StockDetailPreviewProps {
  holding: DashboardHoldingItem | null;
  totalAmount: number;
}

/**
 * @description 선택 종목 상세 요약 카드입니다.
 * @see features/dashboard/components/DashboardContainer.tsx HoldingsList 선택 결과를 전달받아 렌더링합니다.
 */
export function StockDetailPreview({
  holding,
  totalAmount,
}: StockDetailPreviewProps) {
  if (!holding) {
    return (
      <Card>
        <CardHeader>
          <CardTitle className="flex items-center gap-2 text-base">
            <BarChartBig className="h-4 w-4 text-brand-600 dark:text-brand-400" />
            선택 종목 정보
          </CardTitle>
          <CardDescription>
            보유 종목을 선택하면 자세한 정보가 표시됩니다.
          </CardDescription>
        </CardHeader>
        <CardContent>
          <p className="text-sm text-muted-foreground">
            왼쪽 보유 종목 리스트에서 종목을 선택해 주세요.
          </p>
        </CardContent>
      </Card>
    );
  }

  const profitToneClass = getChangeToneClass(holding.profitLoss);
  const allocationRate =
    totalAmount > 0 ? Math.min((holding.evaluationAmount / totalAmount) * 100, 100) : 0;

  return (
    <Card>
      <CardHeader className="pb-3">
        {/* ========== TITLE ========== */}
        <CardTitle className="flex items-center gap-2 text-base">
          <BarChartBig className="h-4 w-4 text-brand-600 dark:text-brand-400" />
          선택 종목 정보
        </CardTitle>
        <CardDescription>
          {holding.name} ({holding.symbol}) · {holding.market}
        </CardDescription>
      </CardHeader>

      <CardContent className="space-y-4">
        {/* ========== PRIMARY METRICS ========== */}
        <div className="grid grid-cols-2 gap-2 text-sm">
          <Metric label="보유 수량" value={`${holding.quantity.toLocaleString("ko-KR")}주`} />
          <Metric label="매입 평균가" value={`${formatCurrency(holding.averagePrice)}원`} />
          <Metric label="현재가" value={`${formatCurrency(holding.currentPrice)}원`} />
          <Metric
            label="수익률"
            value={formatPercent(holding.profitRate)}
            valueClassName={profitToneClass}
          />
          <Metric
            label="현재 손익"
            value={`${formatCurrency(holding.profitLoss)}원`}
            valueClassName={profitToneClass}
          />
          <Metric
            label="평가금액"
            value={`${formatCurrency(holding.evaluationAmount)}원`}
          />
        </div>

        {/* ========== ALLOCATION BAR ========== */}
        <div className="rounded-xl border border-border/70 bg-background/70 p-3">
          <div className="flex items-center justify-between text-xs text-muted-foreground">
            <span>총 자산 대비 비중</span>
            <span>{formatPercent(allocationRate)}</span>
          </div>
          <div className="mt-2 h-2 rounded-full bg-muted">
            <div
              className="h-2 rounded-full bg-linear-to-r from-brand-500 to-brand-700"
              style={{ width: `${allocationRate}%` }}
            />
          </div>
        </div>

        {/* ========== QUICK ORDER PLACEHOLDER ========== */}
        <div className="rounded-xl border border-dashed border-border/80 bg-muted/30 p-3">
          <p className="flex items-center gap-1.5 text-sm font-medium text-foreground/80">
            <MousePointerClick className="h-4 w-4 text-brand-500" />
            빠른 주문(준비 중)
          </p>
          <p className="mt-1 text-xs text-muted-foreground">
            향후 이 영역에서 선택 종목의 빠른 매수/매도 기능을 제공합니다.
          </p>
        </div>
      </CardContent>
    </Card>
  );
}

interface MetricProps {
  label: string;
  value: string;
  valueClassName?: string;
}

/**
 * @description 상세 카드에서 공통으로 사용하는 지표 행입니다.
 * @param label 지표명
 * @param value 지표값
 * @param valueClassName 값 텍스트 색상 클래스
 * @see features/dashboard/components/StockDetailPreview.tsx 종목 상세 지표 표시
 */
function Metric({ label, value, valueClassName }: MetricProps) {
  return (
    <div className="rounded-xl border border-border/70 bg-background/70 p-3">
      <p className="text-xs text-muted-foreground">{label}</p>
      <p className={cn("mt-1 text-sm font-semibold text-foreground", valueClassName)}>
        {value}
      </p>
    </div>
  );
}