"use client";

import {
  Loader2,
  LogOut,
  Wifi,
  WifiOff,
  AlertTriangle,
} from "lucide-react";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/shared/components/ui/dropdown-menu";
import { cn } from "@/shared/lib/utils";
import type { SessionStatus } from "./parcel-sync-types";

/* ------------------------------------------------------------------ */
/*  Connection Status Pill                                             */
/* ------------------------------------------------------------------ */

export function ConnectionPill({
  session,
  connecting,
  connectionError,
  onDisconnect,
}: {
  session: SessionStatus;
  connecting: boolean;
  connectionError: string;
  onDisconnect: () => void;
}) {
  const elapsed = session.connectedAt
    ? Math.floor(
        (Date.now() - new Date(session.connectedAt).getTime()) / 60_000,
      )
    : 0;
  const elapsedLabel =
    elapsed < 1
      ? "acum"
      : elapsed < 60
        ? `${elapsed} min`
        : `${Math.floor(elapsed / 60)}h ${elapsed % 60}m`;

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <button
          type="button"
          className={cn(
            "flex items-center gap-2 rounded-full border px-3 py-1.5 text-xs font-medium transition-all",
            "hover:shadow-sm focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring",
            session.connected
              ? "border-emerald-200 bg-emerald-50/80 text-emerald-700 dark:border-emerald-800 dark:bg-emerald-950/40 dark:text-emerald-400"
              : session.eterraMaintenance
                ? "border-amber-200 bg-amber-50/80 text-amber-600 dark:border-amber-800 dark:bg-amber-950/40 dark:text-amber-400"
                : connectionError
                  ? "border-rose-200 bg-rose-50/80 text-rose-600 dark:border-rose-800 dark:bg-rose-950/40 dark:text-rose-400"
                  : "border-muted-foreground/20 bg-muted/50 text-muted-foreground",
          )}
        >
          {connecting ? (
            <Loader2 className="h-3 w-3 animate-spin" />
          ) : session.connected ? (
            <span className="inline-flex h-2 w-2 rounded-full bg-emerald-500" />
          ) : session.eterraMaintenance ? (
            <AlertTriangle className="h-3 w-3" />
          ) : connectionError ? (
            <WifiOff className="h-3 w-3" />
          ) : (
            <Wifi className="h-3 w-3 opacity-50" />
          )}
          <span className="hidden sm:inline">
            {connecting
              ? "Se conectează…"
              : session.connected
                ? "eTerra"
                : session.eterraMaintenance
                  ? "Mentenanță"
                  : connectionError
                    ? "Eroare"
                    : "Deconectat"}
          </span>
        </button>
      </DropdownMenuTrigger>

      <DropdownMenuContent align="end" className="w-72 p-0">
        {/* Status header */}
        <div
          className={cn(
            "px-3 py-2.5 border-b",
            session.connected
              ? "bg-emerald-50/50 dark:bg-emerald-950/20"
              : "bg-muted/30",
          )}
        >
          <div className="flex items-center justify-between">
            <DropdownMenuLabel className="p-0 text-xs font-semibold">
              Conexiune eTerra
            </DropdownMenuLabel>
            {session.connected && (
              <span className="text-[10px] text-emerald-600 dark:text-emerald-400 font-mono">
                {elapsedLabel}
              </span>
            )}
          </div>
          {session.connected && session.username && (
            <p className="text-[11px] text-muted-foreground mt-0.5 truncate">
              {session.username}
            </p>
          )}
          {connectionError && (
            <p className="text-[11px] text-rose-500 mt-0.5">
              {connectionError}
            </p>
          )}
        </div>

        {/* Maintenance banner */}
        {!session.connected && session.eterraMaintenance && (
          <div className="px-3 py-3 text-xs border-b bg-amber-50/50 dark:bg-amber-950/20">
            <div className="flex items-start gap-2">
              <AlertTriangle className="h-3.5 w-3.5 text-amber-500 mt-0.5 shrink-0" />
              <div>
                <p className="font-medium text-amber-700 dark:text-amber-400">
                  eTerra este în mentenanță
                </p>
                <p className="mt-1 text-[11px] text-amber-600/80 dark:text-amber-400/70">
                  Platforma ANCPI nu este disponibilă momentan. Conectarea va fi
                  reactivată automat când serviciul revine online.
                </p>
                {session.eterraHealthMessage && (
                  <p className="mt-1 text-[10px] opacity-60 font-mono">
                    {session.eterraHealthMessage}
                  </p>
                )}
              </div>
            </div>
          </div>
        )}

        {/* Info when not connected (and not in maintenance) */}
        {!session.connected &&
          !connectionError &&
          !session.eterraMaintenance && (
            <div className="px-3 py-3 text-xs text-muted-foreground">
              <p>Conexiunea se face automat când începi să scrii un UAT.</p>
              <p className="mt-1 text-[11px] opacity-70">
                Credențialele sunt preluate din configurarea serverului.
              </p>
            </div>
          )}

        {/* Error detail (only when NOT maintenance) */}
        {!session.connected &&
          connectionError &&
          !session.eterraMaintenance && (
            <div className="px-3 py-3 text-xs text-muted-foreground">
              <p>
                Conexiunea automată a eșuat. Verifică credențialele din
                variabilele de mediu (ETERRA_USERNAME / ETERRA_PASSWORD).
              </p>
            </div>
          )}

        {/* Connected — active jobs info + disconnect */}
        {session.connected && (
          <>
            {session.activeJobCount > 0 && (
              <div className="px-3 py-2 border-b bg-amber-50/50 dark:bg-amber-950/20">
                <p className="text-[11px] text-amber-700 dark:text-amber-400">
                  <span className="font-semibold">
                    {session.activeJobCount} job
                    {session.activeJobCount > 1 ? "-uri" : ""} activ
                    {session.activeJobCount > 1 ? "e" : ""}
                  </span>
                  {session.activeJobPhase && (
                    <span className="opacity-70">
                      {" "}
                      — {session.activeJobPhase}
                    </span>
                  )}
                </p>
              </div>
            )}
            <DropdownMenuSeparator className="m-0" />
            <div className="p-1.5">
              <button
                type="button"
                className="flex w-full items-center gap-2 rounded-sm px-2 py-1.5 text-xs text-muted-foreground hover:bg-muted hover:text-foreground transition-colors"
                onClick={onDisconnect}
              >
                <LogOut className="h-3 w-3" />
                Deconectare
              </button>
            </div>
          </>
        )}
      </DropdownMenuContent>
    </DropdownMenu>
  );
}