import { useMemo } from "react";

import { useAdminOverview } from "~/shared/services/admin";
import { Section, Badge, InfoRow } from "../components";
import { useAdminContext } from "../context";
import { formatBytes, formatDate, formatUnknown, numberFormatter } from "../utils/format";

export const AdminOverviewPage = () => {
  const { isAuthorized, handleRequestError } = useAdminContext();

  const overviewQuery = useAdminOverview({
    enabled: isAuthorized,
    retry: false,
    refetchInterval: 60_000,
    onError: (error) => {
      handleRequestError(error, "Не удалось загрузить обзор");
    },
  });

  const overviewCards = useMemo(() => {
    const data = overviewQuery.data;
    if (!data) {
      return [];
    }
    const { project, content, node, ipfs, codebase, runtime } = data;
    return [
      {
        label: "Хост",
        value: project.host || "локальный",
        helper: project.name,
      },
      {
        label: "TON Master",
        value: node.ton_master,
        helper: "Платформа",
      },
      {
        label: "Service Wallet",
        value: node.service_wallet,
        helper: node.id,
      },
      {
        label: "Контент",
        value: `${numberFormatter.format(content.encrypted_total)} зашифр.`,
        helper: `${numberFormatter.format(content.derivatives_ready)} деривативов`,
      },
      {
        label: "IPFS Repo",
        value: formatBytes(Number((ipfs.repo as Record<string, unknown>)?.RepoSize ?? 0)),
        helper: "Размер репозитория",
      },
      {
        label: "Bitswap",
        value: numberFormatter.format(Number((ipfs.bitswap as Record<string, unknown>)?.Peers ?? 0)),
        helper: "Пиры",
      },
      {
        label: "Билд",
        value: codebase.commit ?? "n/a",
        helper: codebase.branch ?? "",
      },
      {
        label: "Python",
        value: runtime.python,
        helper: runtime.implementation,
      },
    ];
  }, [overviewQuery.data]);

  if (!overviewQuery.data) {
    return overviewQuery.isLoading ? (
      <Section id="overview" title="Обзор" description="Краткий срез состояния узла, окружения и служб">
        Загрузка…
      </Section>
    ) : null;
  }

  const { project, services, ton, runtime, ipfs } = overviewQuery.data;

  return (
    <Section
      id="overview"
      title="Обзор"
      description="Краткий срез состояния узла, окружения и служб"
      actions={
        <button
          type="button"
          className="rounded-lg bg-slate-800 px-3 py-2 text-xs font-semibold text-slate-200 ring-1 ring-slate-700 transition hover:bg-slate-700"
          onClick={() => overviewQuery.refetch()}
          disabled={overviewQuery.isFetching}
        >
          {overviewQuery.isFetching ? "Обновляем…" : "Обновить"}
        </button>
      }
    >
      <div className="grid gap-4 md:grid-cols-2 xl:grid-cols-4">
        {overviewCards.map((card) => (
          <div key={card.label} className="rounded-xl bg-slate-950/60 p-4 shadow-inner shadow-black/40 ring-1 ring-slate-800">
            <p className="text-xs uppercase tracking-wide text-slate-500">{card.label}</p>
            <p className="mt-2 break-all text-lg font-semibold text-slate-100">{card.value}</p>
            {card.helper ? <p className="mt-1 text-xs text-slate-500">{card.helper}</p> : null}
          </div>
        ))}
      </div>

      <div className="grid gap-6 lg:grid-cols-2">
        <div className="space-y-3">
          <h3 className="text-lg font-semibold text-slate-100">Проект</h3>
          <dl className="grid grid-cols-1 gap-3 sm:grid-cols-2">
            <InfoRow label="Хост">{project.host || "—"}</InfoRow>
            <InfoRow label="Имя">{project.name}</InfoRow>
            <InfoRow label="Приватность">{project.privacy}</InfoRow>
            <InfoRow label="TON Testnet">{ton.testnet ? "Да" : "Нет"}</InfoRow>
            <InfoRow label="TON API Key">{ton.api_key_configured ? "Настроен" : "Нет"}</InfoRow>
            <InfoRow label="TON Host">{ton.host || "—"}</InfoRow>
          </dl>
        </div>
        <div className="space-y-3">
          <h3 className="text-lg font-semibold text-slate-100">Среда выполнения</h3>
          <dl className="grid grid-cols-1 gap-3 sm:grid-cols-2">
            <InfoRow label="Python">{runtime.python}</InfoRow>
            <InfoRow label="Имплементация">{runtime.implementation}</InfoRow>
            <InfoRow label="Платформа">{runtime.platform}</InfoRow>
            <InfoRow label="UTC сейчас">{formatDate(runtime.utc_now)}</InfoRow>
          </dl>
        </div>
      </div>

      <div className="grid gap-6 lg:grid-cols-2">
        <div className="space-y-3">
          <h3 className="text-lg font-semibold text-slate-100">IPFS</h3>
          <div className="grid gap-3 rounded-xl bg-slate-950/60 p-4 ring-1 ring-slate-800">
            <InfoRow label="ID">{formatUnknown((ipfs.identity as Record<string, unknown>)?.ID)}</InfoRow>
            <InfoRow label="Agent">{formatUnknown((ipfs.identity as Record<string, unknown>)?.AgentVersion)}</InfoRow>
            <InfoRow label="Peers">{numberFormatter.format(Number((ipfs.bitswap as Record<string, unknown>)?.Peers ?? 0))}</InfoRow>
            <InfoRow label="Repo size">{formatBytes(Number((ipfs.repo as Record<string, unknown>)?.RepoSize ?? 0))}</InfoRow>
            <InfoRow label="Storage max">{formatBytes(Number((ipfs.repo as Record<string, unknown>)?.StorageMax ?? 0))}</InfoRow>
          </div>
        </div>
        <div className="space-y-3">
          <h3 className="text-lg font-semibold text-slate-100">Сервисы</h3>
          <ul className="space-y-2">
            {services.length === 0 ? (
              <li className="text-sm text-slate-400">Нет зарегистрированных сервисов</li>
            ) : (
              services.map((service) => {
                const status = service.status ?? "—";
                const tone: "success" | "warn" | "danger" | "neutral" = status.includes("working")
                  ? "success"
                  : status.includes("timeout")
                  ? "danger"
                  : "neutral";
                return (
                  <li
                    key={service.name}
                    className="flex items-center justify-between rounded-lg bg-slate-950/40 px-3 py-2 ring-1 ring-slate-800"
                  >
                    <span className="text-sm font-medium text-slate-100">{service.name}</span>
                    <div className="flex items-center gap-3 text-xs text-slate-400">
                      <span>
                        {service.last_reported_seconds != null
                          ? `Обновлён ${Math.round(service.last_reported_seconds)} сек назад`
                          : "Нет данных"}
                      </span>
                      <Badge tone={tone}>{status}</Badge>
                    </div>
                  </li>
                );
              })
            )}
          </ul>
        </div>
      </div>
    </Section>
  );
};