import { createFileRoute, Link } from "@tanstack/react-router";
import { useMemo, useState } from "react";
import { useQuery } from "@tanstack/react-query";
import { fetchThemes, type ThemeItem, type ThemeSortField } from "@/lib/theme-api";
import { getStockBoard } from "@/lib/stock-api";
import { formatMoney } from "@/lib/utils";
import { Card, CardContent } from "@/components/ui/card";
import {
  ArrowLeft,
  RefreshCw,
  ArrowDown,
  ArrowUp,
  TrendingUp,
  TrendingDown,
  Flame,
  Network,
} from "lucide-react";

export const Route = createFileRoute("/themes")({
  component: ThemesPage,
});

/* ============================================================
   排序维度（sortField 与后端/东方财富对齐）
   ============================================================ */
const SORTS: { key: ThemeSortField; label: string }[] = [
  { key: 1, label: "涨幅" },
  { key: 3, label: "强度" },
  { key: 4, label: "热度" },
  { key: 5, label: "成交额" },
];

function ThemesPage() {
  const [sortField, setSortField] = useState<ThemeSortField>(1);
  const [asc, setAsc] = useState(false); // 默认降序

  const { data: themes, isLoading, isFetching, isError, refetch } = useQuery({
    queryKey: ["themes", sortField, asc],
    queryFn: () => fetchThemes(sortField, asc),
    staleTime: 30_000,
    retry: false,
  });

  const data = themes ?? [];

  const toggleSort = (key: ThemeSortField) => {
    if (key === sortField) {
      setAsc((v) => !v);
    } else {
      setSortField(key);
      setAsc(false); // 切新维度默认降序
    }
  };

  return (
    <div className="min-h-screen bg-background">
      {/* ── 顶栏 ── */}
      <header className="sticky top-0 z-10 bg-background/95 backdrop-blur border-b">
        <div className="max-w-5xl mx-auto px-4 h-12 flex items-center justify-between">
          <div className="flex items-center gap-3">
            <Link to="/" className="hover:opacity-70 transition-opacity">
              <ArrowLeft className="h-5 w-5" />
            </Link>
            <h1 className="text-base font-semibold">题材热点</h1>
          </div>
          <div className="flex items-center gap-3">
            <Link
              to="/hot-map"
              className="text-xs text-primary flex items-center gap-1 hover:opacity-80 transition-opacity"
            >
              <Network className="h-3.5 w-3.5" />
              热点穿透
            </Link>
            <Link
              to="/core-stocks"
              className="text-xs text-primary flex items-center gap-1 hover:opacity-80 transition-opacity"
            >
              <Flame className="h-3.5 w-3.5" />
              热点股
            </Link>
            <button
              onClick={() => refetch()}
              className="text-muted-foreground hover:text-foreground transition-colors"
              title="刷新"
            >
              <RefreshCw className={`h-4 w-4 ${isFetching ? "animate-spin" : ""}`} />
            </button>
          </div>
        </div>
      </header>

      {/* ── 排序切换 + 统计 ── */}
      <div className="max-w-5xl mx-auto px-4 mt-3 flex items-center justify-between">
        <p className="text-[10px] text-muted-foreground">
          共 {data.length} 个题材
          {isFetching && (
            <span className="ml-1 text-[10px] text-muted-foreground/60">· 刷新中…</span>
          )}
        </p>
        <div className="flex gap-0.5 text-xs border rounded-md overflow-hidden">
          {SORTS.map((s) => (
            <button
              key={s.key}
              onClick={() => toggleSort(s.key)}
              className={`px-2.5 py-1 flex items-center gap-0.5 transition-colors ${
                sortField === s.key
                  ? "bg-primary text-primary-foreground"
                  : "text-muted-foreground hover:text-foreground"
              }`}
            >
              {s.label}
              {sortField === s.key &&
                (asc ? <ArrowUp className="h-3 w-3" /> : <ArrowDown className="h-3 w-3" />)}
            </button>
          ))}
        </div>
      </div>

      {/* ── 内容区 ── */}
      <div className="max-w-5xl mx-auto px-4 mt-3 pb-8">
        {isLoading ? (
          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-3">
            {Array.from({ length: 18 }).map((_, i) => (
              <div key={i} className="animate-pulse rounded-xl bg-muted h-32" />
            ))}
          </div>
        ) : isError ? (
          <div className="flex flex-col items-center gap-3 py-20">
            <p className="text-sm text-muted-foreground">数据加载失败</p>
            <button onClick={() => refetch()} className="text-xs text-primary hover:underline">
              点击重试
            </button>
          </div>
        ) : data.length === 0 ? (
          <div className="text-center py-20 text-sm text-muted-foreground">暂无题材数据</div>
        ) : (
          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-3">
            {data.map((item) => (
              <ThemeCard key={item.themeCode} item={item} />
            ))}
          </div>
        )}
      </div>
    </div>
  );
}

/* ============================================================
   数值格式化
   ============================================================ */
function fmt(val: number | null | undefined, digits = 2): string {
  if (val == null) return "--";
  return val.toFixed(digits);
}

/* ============================================================
   题材卡片
   ============================================================ */
function ThemeCard({ item }: { item: ThemeItem }) {
  const change = item.bf3;
  const hotPct =
    item.hotValueUpLimit > 0 ? Math.min((item.hotValue / item.hotValueUpLimit) * 100, 100) : 0;
  const stockBoard = getStockBoard(item.securityCode);

  return (
    <Link to="/theme/$code" params={{ code: item.themeCode }} className="block">
      <Card className="rounded-xl hover:shadow-md transition-shadow h-full">
        <CardContent className="p-3 space-y-2">
          {/* 题材名 + 领涨标签 */}
          <div className="flex items-center justify-between gap-1">
            <p className="text-sm font-medium truncate" title={item.themeName}>
              {item.themeName}
            </p>
            {item.label && (
              <span className="shrink-0 text-[9px] font-medium text-orange-500 bg-orange-500/10 border border-orange-500/30 rounded px-1 py-0.5">
                {item.label}
              </span>
            )}
          </div>

          {/* 热度进度条 */}
          <div className="flex items-center gap-1">
            <Flame className="h-3 w-3 text-orange-500 shrink-0" />
            <div className="flex-1 h-1.5 rounded-full bg-muted overflow-hidden">
              <div
                className="h-full rounded-full bg-gradient-to-r from-orange-400 to-red-500"
                style={{ width: `${Math.max(hotPct, 2)}%` }}
              />
            </div>
            <span className="text-[10px] text-muted-foreground tabular-nums shrink-0">
              {item.hotValue}/{item.hotValueUpLimit}
            </span>
          </div>

          {/* 涨幅 + 成交额 */}
          <div className="flex items-center justify-between">
            {change != null ? (
              <span
                className={`inline-flex items-center gap-0.5 text-xs font-semibold ${
                  change >= 0 ? "text-red-500" : "text-green-500"
                }`}
              >
                {change >= 0 ? <TrendingUp className="h-3 w-3" /> : <TrendingDown className="h-3 w-3" />}
                {change >= 0 ? "+" : ""}
                {fmt(change)}%
              </span>
            ) : (
              <span className="text-xs text-muted-foreground">--</span>
            )}
            <span className="text-[10px] text-muted-foreground">
              {item.fex5 != null ? formatMoney(item.fex5) : "--"}
            </span>
          </div>

          {/* 分割线 */}
          <hr className="border-border/40" />

          {/* 领涨股 + 强度 */}
          <div className="flex items-center justify-between">
            <div className="flex items-center gap-1 min-w-0">
              <span className="text-[10px] text-muted-foreground shrink-0">领涨</span>
              <span className="text-xs font-medium truncate">{item.securityName || "--"}</span>
              {stockBoard.label && (
                <span
                  className={`inline-flex items-center justify-center w-3.5 h-3.5 rounded-sm text-[8px] font-bold leading-none shrink-0 ${stockBoard.className}`}
                >
                  {stockBoard.label}
                </span>
              )}
            </div>
            <div className="flex items-center gap-2 shrink-0">
              {item.f3 != null && (
                <span
                  className={`text-[10px] tabular-nums ${
                    item.f3 >= 0 ? "text-red-500" : "text-green-500"
                  }`}
                >
                  {item.f3 >= 0 ? "+" : ""}
                  {fmt(item.f3)}%
                </span>
              )}
              <span className="text-[10px] text-muted-foreground tabular-nums">
                强度 {item.strengthValue ?? "--"}
              </span>
            </div>
          </div>
        </CardContent>
      </Card>
    </Link>
  );
}