"use client";

/**
 * AppAdminSubmissions — native overlay za /admin/prijave.
 * Filter NEW/IN_REVIEW/APPROVED/REJECTED + inline quick approve/reject.
 */

import { usePathname } from "next/navigation";
import { useCallback, useEffect, useState } from "react";

import { nativeHaptic } from "@/components/native/CapacitorBootstrap";
import { trackScreen } from "@/lib/native/analytics";
import { getLocalePrefix, type Locale } from "@/lib/i18n/i18n";
import { useAppVariant } from "@/lib/native/app-variant";
import { useAdminPreview } from "@/lib/native/preview-admin";

type Submission = {
  id: string;
  type?: string;
  name?: string;
  email?: string;
  phone?: string | null;
  status: string;
  category?: { nameSr?: string | null } | null;
  city?: { nameSr?: string | null } | null;
  createdAt: string;
  source?: string | null;
  notes?: string | null;
  message?: string | null;
};

type Filter = "ALL" | "NEW" | "IN_REVIEW" | "APPROVED" | "REJECTED";

function useIsNative(): boolean | null {
  const [n, setN] = useState<boolean | null>(null);
  useEffect(() => {
    let d = false;
    (async () => {
      try {
        const { Capacitor } = await import("@capacitor/core");
        if (!d) setN(Capacitor.isNativePlatform());
      } catch {
        if (!d) setN(false);
      }
    })();
    return () => {
      d = true;
    };
  }, []);
  return n;
}

function isPath(p: string, prefix: string): boolean {
  const x = prefix && p.startsWith(prefix) ? p.slice(prefix.length) : p;
  return (x.replace(/\/+$/, "") || "/") === "/admin/prijave";
}

function timeAgo(iso: string): string {
  const diff = Math.max(0, Date.now() - new Date(iso).getTime());
  const m = Math.floor(diff / 60000);
  if (m < 1) return "sad";
  if (m < 60) return `${m}m`;
  const h = Math.floor(m / 60);
  if (h < 24) return `${h}h`;
  return `${Math.floor(h / 24)}d`;
}

function statusPill(s: string): { label: string; cls: string } {
  switch (s) {
    case "NEW":
      return { label: "Novo", cls: "apppartner-pill-new" };
    case "IN_REVIEW":
      return { label: "U obradi", cls: "apppartner-pill-muted" };
    case "APPROVED":
      return { label: "Odobreno", cls: "apppartner-pill-good" };
    case "REJECTED":
      return { label: "Odbijeno", cls: "apppartner-pill-muted" };
    case "COMPLETED":
      return { label: "Završeno", cls: "apppartner-pill-good" };
    default:
      return { label: s, cls: "apppartner-pill-muted" };
  }
}

export function AppAdminSubmissions({
  locale,
  dictionary,
}: {
  locale: Locale;
  dictionary: Record<string, string>;
}) {
  const native = useIsNative();
  const variant = useAppVariant();
  const pathname = usePathname();
  const prefix = getLocalePrefix(locale);
  const preview = useAdminPreview();
  const active =
    (preview.enabled && preview.screen === "submissions") ||
    (isPath(pathname, prefix) && native === true && variant === "admin");

  const [items, setItems] = useState<Submission[] | null>(null);
  const [filter, setFilter] = useState<Filter>("NEW");
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState(false);
  const [expanded, setExpanded] = useState<string | null>(null);
  const [busy, setBusy] = useState<string | null>(null);
  const [msg, setMsg] = useState<string | null>(null);

  const t = (k: string, fb: string) => dictionary[k] ?? fb;

  const load = useCallback(
    async (f: Filter) => {
      setLoading(true);
      setError(false);
      try {
        const url = preview.enabled
          ? "/api/app/admin/demo?kind=submissions"
          : f === "ALL"
            ? "/api/admin/submissions"
            : `/api/admin/submissions?status=${f}`;
        const res = await fetch(url, { cache: "no-store" });
        if (res.status === 401 && !preview.enabled) {
          window.location.assign(`${prefix}/admin/login`);
          return;
        }
        if (!res.ok) {
          setError(true);
          return;
        }
        const j = (await res.json()) as { data?: { items?: Submission[] }; items?: Submission[] };
        const arr = j.data?.items ?? j.items ?? [];
        setItems(arr);
      } catch {
        setError(true);
      } finally {
        setLoading(false);
      }
    },
    [prefix, preview.enabled],
  );

  useEffect(() => {
    if (active) void load(filter);
  }, [active, filter, load, preview.enabled]);

  useEffect(() => {
    if (active) trackScreen("admin_submissions");
  }, [active]);

  const updateStatus = useCallback(
    async (id: string, status: "APPROVED" | "REJECTED" | "IN_REVIEW") => {
      setMsg(null);
      setBusy(id + ":" + status);
      try {
        const res = await fetch(
          preview.enabled
            ? "/api/app/admin/demo"
            : `/api/admin/submissions/${id}`,
          {
          method: "PATCH",
          headers: { "content-type": "application/json" },
          body: JSON.stringify({ status }),
          },
        );
        if (!res.ok) {
          setMsg("Greška pri ažuriranju.");
          return;
        }
        setExpanded(null);
        await load(filter);
      } catch {
        setMsg("Greška pri ažuriranju.");
      } finally {
        setBusy(null);
      }
    },
    [filter, load, preview.enabled],
  );

  if (!active) return null;

  const tabs: Array<{ key: Filter; label: string }> = [
    { key: "NEW", label: t("admin.sub.new", "Nove") },
    { key: "IN_REVIEW", label: t("admin.sub.review", "U obradi") },
    { key: "APPROVED", label: t("admin.sub.approved", "Odobrene") },
    { key: "ALL", label: t("admin.sub.all", "Sve") },
  ];

  return (
    <div className="apppartner-root" role="region" aria-label="Prijave">
      <div className="apppartner-hero apppartner-hero-compact">
        <div className="apppartner-hero-text">
          <p className="apppartner-kicker">{t("admin.sub.kicker", "Prijave")}</p>
          <h1 className="apppartner-title">{t("admin.sub.title", "Nove prijave firmi")}</h1>
        </div>
      </div>

      <div className="apppartner-tabs" role="tablist">
        {tabs.map((tab) => (
          <button
            key={tab.key}
            type="button"
            role="tab"
            aria-selected={filter === tab.key}
            className="apppartner-tab"
            data-active={filter === tab.key ? "true" : "false"}
            onClick={() => {
              void nativeHaptic();
              setFilter(tab.key);
            }}
          >
            {tab.label}
          </button>
        ))}
      </div>

      <div className="apppartner-body">
        {loading && !items ? (
          <div className="apppartner-skel-grid" aria-hidden>
            {Array.from({ length: 4 }).map((_, i) => (
              <div key={i} className="apppartner-skel apppartner-skel-row" />
            ))}
          </div>
        ) : error ? (
          <div className="apppartner-empty">
            <p>{t("admin.sub.err", "Trenutno ne mogu da učitam prijave.")}</p>
            <button
              type="button"
              className="apppartner-btn-primary"
              onClick={() => {
                void nativeHaptic();
                void load(filter);
              }}
            >
              {t("common.retry", "Pokušaj ponovo")}
            </button>
          </div>
        ) : !items || items.length === 0 ? (
          <p className="apppartner-empty-line">{t("admin.sub.empty", "Nema prijava u ovoj kategoriji.")}</p>
        ) : (
          <ul className="apppartner-list">
            {items.map((s) => {
              const sp = statusPill(s.status);
              const isOpen = expanded === s.id;
              const canApprove = s.status === "NEW" || s.status === "IN_REVIEW";
              const canReject = canApprove;
              return (
                <li key={s.id} className="apppartner-list-item">
                  <div
                    className="apppartner-list-link"
                    role="button"
                    tabIndex={0}
                    onClick={() => {
                      void nativeHaptic();
                      setExpanded(isOpen ? null : s.id);
                      setMsg(null);
                    }}
                    onKeyDown={(e) => {
                      if (e.key === "Enter" || e.key === " ") {
                        e.preventDefault();
                        setExpanded(isOpen ? null : s.id);
                      }
                    }}
                  >
                    <div className="apppartner-list-row">
                      <span className="apppartner-list-title">{s.name ?? "—"}</span>
                      <span className={`apppartner-pill ${sp.cls}`}>{sp.label}</span>
                    </div>
                    <p className="apppartner-list-msg">
                      {s.category?.nameSr ?? s.type ?? "—"}
                      {s.city?.nameSr ? ` · ${s.city.nameSr}` : ""}
                      {s.email ? ` · ${s.email}` : ""}
                    </p>
                    {s.message ? <p className="apppartner-list-msg apppartner-list-answer">{s.message}</p> : null}
                    <div className="apppartner-list-meta">
                      <span>{timeAgo(s.createdAt)}</span>
                      {s.source ? <span>· {s.source}</span> : null}
                    </div>

                    {isOpen && (canApprove || canReject) ? (
                      <div className="apppartner-form-actions" onClick={(e) => e.stopPropagation()}>
                        {canApprove ? (
                          <button
                            type="button"
                            className="apppartner-btn-primary apppartner-btn-block"
                            disabled={busy === s.id + ":APPROVED"}
                            onClick={() => {
                              void nativeHaptic();
                              void updateStatus(s.id, "APPROVED");
                            }}
                          >
                            {busy === s.id + ":APPROVED" ? "Odobravam…" : "✓ Odobri"}
                          </button>
                        ) : null}
                        {canReject ? (
                          <button
                            type="button"
                            className="apppartner-btn-ghost"
                            disabled={busy === s.id + ":REJECTED"}
                            onClick={() => {
                              void nativeHaptic();
                              void updateStatus(s.id, "REJECTED");
                            }}
                          >
                            {busy === s.id + ":REJECTED" ? "Odbijam…" : "✕ Odbij"}
                          </button>
                        ) : null}
                      </div>
                    ) : null}
                    {isOpen && msg ? <p className="apppartner-form-msg">{msg}</p> : null}
                  </div>
                </li>
              );
            })}
          </ul>
        )}
      </div>
    </div>
  );
}

export default AppAdminSubmissions;