import React from "react";
import { Breadcrumbs, BreadcrumbItem } from "@heroui/react";
import { useContestStore } from "@/stores/contestStore";
import { useLanguageStore } from "@/stores/languageStore";
import { useNavigate } from "react-router-dom";

type AppBreadcrumbsProps = {
  extra?: { label: string; href?: string }[];
};

export default function AppBreadcrumbs({ extra = [] }: AppBreadcrumbsProps) {
  const selectedContest = useContestStore((s) => s.selectedContest);
  const selectedRound = useContestStore((s) => s.selectedRound);
  const setSelectedRound = useContestStore((s) => s.setSelectedRound);
  const clearSelection = useContestStore((s) => s.clearSelection);
  const setSelectedContest = useContestStore((s) => s.setSelectedContest);
  const locale = useLanguageStore((s) => s.locale);
  const navigate = useNavigate();

  const resolveLabel = (value: any): string => {
    if (!value) return "";
    if (typeof value === "string") return value;
    if (typeof value === "object") {
      if (value[locale]) return value[locale];
      if (value["en"]) return value["en"];
      const first = Object.values(value)[0];
      return typeof first === "string" ? first : "";
    }
    return String(value);
  };

  const crumbs = [
    { label: "Home", href: "/", level: "home" as const },
    { label: "Závody", href: "/contests", level: "contests" as const },
    ...(selectedContest
      ? [{
          label: resolveLabel(selectedContest.name),
          href: `/contests/${selectedContest.id}`,
          level: "contest" as const,
          contest: selectedContest,
        }]
      : []),
    ...(selectedRound
      ? [{
          label: resolveLabel(selectedRound.name),
          href: `/contests/${selectedContest?.id ?? ""}/rounds/${selectedRound.id}`,
          level: "round" as const,
        }]
      : []),
    ...extra,
  ];

  const handleNavigate = (href?: string, level?: "home" | "contests" | "contest" | "round", contest?: any) => {
    if (!href) return;

    // při kliknutí na vyšší úroveň vyčisti nižší selekce
    if (level === "home") {
      clearSelection();
    } else if (level === "contests") {
      setSelectedRound(null);
    } else if (level === "contest") {
      setSelectedRound(null);
      if (contest) {
        setSelectedContest(contest);
      }
    }

    navigate(href);
  };

  return (
    <Breadcrumbs aria-label="Breadcrumb" variant="solid" className="mb-2">
      {crumbs.map((c, idx) => (
        <BreadcrumbItem
          key={`${c.label}-${idx}`}
          href={c.href}
          onPress={() => handleNavigate(c.href, c.level as any, (c as any).contest)}
        >
          {c.label}
        </BreadcrumbItem>
      ))}
    </Breadcrumbs>
  );
}