"use client";

import { ReactNode, useState } from "react";
import Link from "next/link";
import {
  AlertTriangle,
  CheckCircle2,
  ChevronDown,
  Clock,
  Loader2,
  type LucideIcon,
} from "lucide-react";
import { VOICE_TOO_MANY_OPEN_HINT, voiceRejectionText } from "@/lib/offline/queue-texts";
import type { VoiceCaptureListItem } from "@/lib/voice/api";
import type { StoredVoiceNote } from "@/lib/voice/pending-voice";
import {
  VOICE_WAITING_FOR_NETWORK,
  describeVoiceCapture,
  type VoiceStatusIcon,
  type VoiceStatusText,
} from "@/lib/voice/status-texts";
import { Button } from "@/components/ui/button";
import { Card, CardContent } from "@/components/ui/card";
import { VoiceConfirmDialog } from "./voice-confirm-dialog";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";

const STATUS_ICONS: Record<VoiceStatusIcon, LucideIcon> = {
  wait: Clock,
  work: Loader2,
  ready: CheckCircle2,
  failed: AlertTriangle,
};

const TIME_FORMAT = new Intl.DateTimeFormat("de-DE", {
  day: "2-digit",
  month: "2-digit",
  hour: "2-digit",
  minute: "2-digit",
  timeZone: "Europe/Berlin",
});

function timeText(iso: string): string {
  return `${TIME_FORMAT.format(new Date(iso))} Uhr`.replace(", ", " · ");
}

function StatusLine({ status }: { status: VoiceStatusText }) {
  const Icon = STATUS_ICONS[status.icon];
  return (
    <p className="flex items-center gap-2 text-sm font-medium">
      <Icon
        className={`size-4 shrink-0${status.icon === "work" ? " motion-safe:animate-spin" : ""}`}
        aria-hidden
      />
      {status.label}
    </p>
  );
}

interface DiscardMenuProps {
  /** Names the menu for assistive tech, e.g. "B3, 14.10. · 09:12 Uhr". */
  subject: string;
  onDiscard(): void;
  disabled?: boolean;
}

/** „Mehr“ with „Verwerfen“, which asks first: a discarded note cannot come back. */
function DiscardMenu({ subject, onDiscard, disabled }: DiscardMenuProps) {
  const [confirmOpen, setConfirmOpen] = useState(false);
  return (
    <>
      <DropdownMenu>
        <DropdownMenuTrigger
          render={
            <Button
              variant="outline"
              size="touch"
              className="min-h-14"
              aria-label={`Mehr zu ${subject}`}
            />
          }
        >
          Mehr
          <ChevronDown aria-hidden />
        </DropdownMenuTrigger>
        <DropdownMenuContent align="end" className="w-auto min-w-48">
          <DropdownMenuItem
            className="min-h-11 px-3"
            disabled={disabled}
            onClick={() => setConfirmOpen(true)}
          >
            Verwerfen
          </DropdownMenuItem>
        </DropdownMenuContent>
      </DropdownMenu>
      <VoiceConfirmDialog
        open={confirmOpen}
        title="Sprachnotiz verwerfen?"
        description="Die Sprachnotiz wird gelöscht. Das lässt sich nicht rückgängig machen."
        cancelLabel="Abbrechen"
        confirmLabel="Verwerfen"
        onCancel={() => setConfirmOpen(false)}
        onConfirm={() => {
          setConfirmOpen(false);
          onDiscard();
        }}
      />
    </>
  );
}

interface CardShellProps {
  title: string;
  time: string;
  status: VoiceStatusText;
  detail?: string | null;
  children?: ReactNode;
}

function CardShell({ title, time, status, detail, children }: CardShellProps) {
  return (
    <Card>
      <CardContent className="flex flex-col gap-3">
        <div className="flex flex-wrap items-baseline justify-between gap-x-3">
          <h2 className="font-heading text-lg font-semibold">{title}</h2>
          <p className="text-sm text-muted-foreground">{time}</p>
        </div>
        <StatusLine status={status} />
        {detail ? <p className="text-sm text-muted-foreground">{detail}</p> : null}
        {children ? <div className="flex flex-wrap gap-2 [&>*]:flex-1 sm:[&>*]:flex-none">{children}</div> : null}
      </CardContent>
    </Card>
  );
}

interface LocalVoiceCardProps {
  note: StoredVoiceNote;
  colonyName: string;
  /** Whether the device is online: a waiting note is then about to be sent. */
  online: boolean;
  onDiscard(): void;
}

/** What a recording on this device is doing, in words. */
function localStatus(note: StoredVoiceNote, online: boolean): { status: VoiceStatusText; detail: string | null } {
  if (note.lastError) {
    return {
      status: { label: "Fehlgeschlagen", icon: "failed" },
      detail: voiceRejectionText(note.lastError),
    };
  }
  if (note.blockedBy === "TOO_MANY_OPEN") {
    return {
      status: { label: "Wartet auf freien Platz", icon: "wait" },
      detail: VOICE_TOO_MANY_OPEN_HINT,
    };
  }
  if (note.state === "uploading" || online) {
    return { status: { label: "Wird gesendet", icon: "work" }, detail: null };
  }
  return { status: VOICE_WAITING_FOR_NETWORK, detail: null };
}

/** A recording that still waits on this device. */
export function LocalVoiceCard({ note, colonyName, online, onDiscard }: LocalVoiceCardProps) {
  const time = timeText(note.createdAt);
  const { status, detail } = localStatus(note, online);
  const again = new URLSearchParams({ colonyId: note.colonyId, date: note.inspectionDate });
  return (
    <CardShell title={colonyName} time={time} status={status} detail={detail}>
      {note.lastError ? (
        <Button
          size="touch"
          className="min-h-14"
          nativeButton={false}
          render={<Link href={`/voice/new?${again.toString()}`} />}
        >
          Neu aufnehmen
        </Button>
      ) : null}
      <DiscardMenu subject={`${colonyName}, ${time}`} onDiscard={onDiscard} />
    </CardShell>
  );
}

interface VoiceCaptureCardProps {
  item: VoiceCaptureListItem;
  /** False when the operator switched the evaluation off. */
  extractionEnabled?: boolean;
  onRetry(): void;
  onDiscard(): void;
  busy?: boolean;
}

/** A note the server holds. */
export function VoiceCaptureCard({
  item,
  extractionEnabled = true,
  onRetry,
  onDiscard,
  busy,
}: VoiceCaptureCardProps) {
  const state = describeVoiceCapture(item, extractionEnabled);
  const time = timeText(item.createdAt);
  const reviewHref = `/inspections/new?colonyId=${encodeURIComponent(item.colonyId)}&voice=${encodeURIComponent(item.id)}`;
  return (
    <CardShell title={item.colonyName} time={time} status={state.status} detail={state.detail}>
      {state.action !== "none" ? (
        <Button
          size="touch"
          className="min-h-14"
          nativeButton={false}
          render={<Link href={reviewHref} />}
        >
          {state.action === "review" ? "Prüfen" : "Text ansehen"}
        </Button>
      ) : null}
      {state.canRetry ? (
        <Button
          type="button"
          size="touch"
          variant="outline"
          className="min-h-14"
          disabled={busy}
          onClick={onRetry}
        >
          Nochmal versuchen
        </Button>
      ) : null}
      <DiscardMenu subject={`${item.colonyName}, ${time}`} onDiscard={onDiscard} disabled={busy} />
    </CardShell>
  );
}