import { useEffect, useRef } from "react";
import { io } from "socket.io-client";
import { useQueryClient } from "@tanstack/react-query";
import {
  getListNotificationsQueryKey,
  getGetHomeStatsQueryKey,
  getListMyServiceOrdersQueryKey,
  getListIncomingServiceOrdersQueryKey,
  getListAppsQueryKey,
  getGetMeQueryKey,
  getListRolesQueryKey,
  getListPermissionsQueryKey,
  getGetRolePermissionsQueryKey,
  getGetRolePermissionAuditQueryKey,
  getGetRoleUsageQueryKey,
} from "@workspace/api-client-react";
import { useAuth } from "@/contexts/AuthContext";
import { notificationPlayer } from "@/lib/notification-sounds";
import { toast } from "@/hooks/use-toast";
import i18n from "@/i18n";
import {
  useIncomingNotePopup,
  type IncomingNotePayload,
  type IncomingReplyPayload,
} from "@/contexts/IncomingNotePopupContext";

const BASE = import.meta.env.BASE_URL.replace(/\/$/, "");

const SOCKET_WARMUP_MS = 3000;
const nowMs = () =>
  typeof performance !== "undefined" ? performance.now() : Date.now();

export function useNotificationsSocket() {
  const { user } = useAuth();
  const queryClient = useQueryClient();
  const connectedAtRef = useRef<number>(0);
  const { enqueue: enqueueNotePopup } = useIncomingNotePopup();
  const enqueueNotePopupRef = useRef(enqueueNotePopup);
  enqueueNotePopupRef.current = enqueueNotePopup;
  const currentUserIdRef = useRef<number | null>(user?.id ?? null);
  currentUserIdRef.current = user?.id ?? null;
  // Dedupe note chimes by noteId so a socket reconnect that replays the
  // same `note_received` event (or a duplicate emit from the server)
  // doesn't beep twice for the same incoming note. Mirrors the
  // `playedRef` pattern used by upcoming-meeting-alert.
  const playedNoteIdsRef = useRef<Set<number>>(new Set());
  // Same dedupe shape as `playedNoteIdsRef`, but keyed on replyId so a
  // reconnect that replays a `note_replied` event doesn't re-chime.
  const playedReplyIdsRef = useRef<Set<number>>(new Set());

  useEffect(() => {
    if (!user) return;

    // Suppress chimes for the first few seconds after the socket
    // connects so any pending notifications that flush in on page
    // load don't all play sounds back-to-back.
    connectedAtRef.current = nowMs();

    const socket = io(window.location.origin, {
      path: `${BASE}/api/socket.io`,
    });

    socket.on("connect", () => {
      connectedAtRef.current = nowMs();
    });

    socket.on("notification_created", (payload?: { type?: string }) => {
      queryClient.invalidateQueries({ queryKey: getListNotificationsQueryKey() });
      queryClient.invalidateQueries({ queryKey: getGetHomeStatsQueryKey() });
      if (payload?.type === "order") {
        queryClient.invalidateQueries({
          queryKey: getListMyServiceOrdersQueryKey(),
        });
        queryClient.invalidateQueries({
          queryKey: getListIncomingServiceOrdersQueryKey(),
        });
      }

      // Per-user sound + vibration. Plays whether the tab is in the
      // foreground or background — users want to hear the chime even
      // while looking at the app. Still silenced by global mute and
      // per-channel opt-outs below.
      if (user.notificationsMuted) return;
      const isOrder = payload?.type === "order";
      const isMeeting = payload?.type === "executive_meeting";
      if (isOrder && !user.notifyOrdersEnabled) return;
      if (isMeeting && !user.notifyMeetingsEnabled) return;
      if (!isOrder && !isMeeting) return;
      // Skip audio/vibration during the warmup window — UI/badge
      // counts (above) still update, but we stay silent so a
      // page-load flush doesn't sound like an alarm.
      if (nowMs() - connectedAtRef.current < SOCKET_WARMUP_MS) return;
      const soundId = isOrder
        ? user.notificationSoundOrder
        : user.notificationSoundMeeting;
      const vibrate = isOrder
        ? user.vibrationEnabledOrder
        : user.vibrationEnabledMeeting;
      notificationPlayer.play(soundId, { vibrate });
    });

    socket.on("order_updated", () => {
      queryClient.invalidateQueries({
        queryKey: getListMyServiceOrdersQueryKey(),
      });
      queryClient.invalidateQueries({
        queryKey: getListIncomingServiceOrdersQueryKey(),
      });
    });

    socket.on("order_deleted", () => {
      queryClient.invalidateQueries({
        queryKey: getListMyServiceOrdersQueryKey(),
      });
      queryClient.invalidateQueries({
        queryKey: getListIncomingServiceOrdersQueryKey(),
      });
    });

    socket.on("order_incoming_changed", () => {
      queryClient.invalidateQueries({
        queryKey: getListIncomingServiceOrdersQueryKey(),
      });
    });

    // Realtime note events: invalidate notes queries AND surface a toast so
    // the recipient (or sender, on a reply) sees an immediate, dismissible
    // confirmation regardless of which page they're on.
    socket.on("note_received", (payload?: Partial<IncomingNotePayload>) => {
      queryClient.invalidateQueries({ queryKey: ["notes"] });
      const inWarmup = nowMs() - connectedAtRef.current < SOCKET_WARMUP_MS;
      let enqueued = false;
      if (
        payload &&
        typeof payload.noteId === "number" &&
        typeof payload.senderUserId === "number"
      ) {
        const full: IncomingNotePayload = {
          noteId: payload.noteId,
          recipientRowId: payload.recipientRowId,
          title: typeof payload.title === "string" ? payload.title : "",
          content: typeof payload.content === "string" ? payload.content : "",
          color: typeof payload.color === "string" ? payload.color : "default",
          sentAt: payload.sentAt,
          senderUserId: payload.senderUserId,
          sender: payload.sender ?? null,
        };
        enqueued = enqueueNotePopupRef.current(
          full,
          currentUserIdRef.current,
        );
      }
      if (inWarmup) return;
      // Sound + vibration for incoming notes — gated by global mute and
      // the per-channel notes toggle. Deduped by noteId so a socket
      // reconnect that replays the same event doesn't re-chime. Only
      // plays when the popup actually enqueued (i.e. recipient !== sender).
      if (
        enqueued &&
        payload &&
        typeof payload.noteId === "number" &&
        !user.notificationsMuted &&
        user.notifyNotesEnabled &&
        !playedNoteIdsRef.current.has(payload.noteId)
      ) {
        playedNoteIdsRef.current.add(payload.noteId);
        notificationPlayer.play(user.notificationSoundNote, {
          vibrate: user.vibrationEnabledNote,
        });
      }
      toast({
        title: i18n.t("notes.toast.received.title"),
        description: i18n.t("notes.toast.received.desc"),
      });
    });

    socket.on(
      "note_replied",
      (payload?: Partial<IncomingReplyPayload> & { recipientUserId?: number }) => {
        queryClient.invalidateQueries({ queryKey: ["notes"] });
        const inWarmup = nowMs() - connectedAtRef.current < SOCKET_WARMUP_MS;
        let enqueued = false;
        // The server emits `note_replied` only to the *original note
        // owner* (i.e. the sender). Build a reply popup payload — the
        // queue dedupes on replyId so a socket reconnect that replays
        // the same event won't re-show or re-chime.
        if (
          payload &&
          typeof payload.noteId === "number" &&
          typeof payload.replyId === "number"
        ) {
          // The "sender" of the *original* note is the current user
          // (the owner) — we don't have their full UserSummary on the
          // payload, but the floating card never renders it for the
          // reply variant; it shows the replier instead. Use the
          // replier's id as a stand-in for senderUserId so the
          // queue's "ignore my own outgoing" guard treats this event
          // as inbound (the replier is *not* the current user).
          const replierId = payload.replier?.id;
          const senderUserId =
            typeof replierId === "number" ? replierId : -1;
          const full: IncomingReplyPayload = {
            kind: "reply",
            noteId: payload.noteId,
            replyId: payload.replyId,
            replyContent:
              typeof payload.replyContent === "string"
                ? payload.replyContent
                : "",
            replier: payload.replier ?? null,
            noteTitle:
              typeof payload.noteTitle === "string" ? payload.noteTitle : "",
            title:
              typeof payload.noteTitle === "string" ? payload.noteTitle : "",
            content:
              typeof payload.replyContent === "string"
                ? payload.replyContent
                : "",
            color:
              typeof payload.color === "string" ? payload.color : "default",
            senderUserId,
            sender: payload.replier ?? null,
          };
          enqueued = enqueueNotePopupRef.current(
            full,
            currentUserIdRef.current,
          );
        }
        if (inWarmup) return;
        // Sound + vibration mirror the new-note alert. Reuse the same
        // notes channel prefs (notificationSoundNote /
        // vibrationEnabledNote / notifyNotesEnabled) — the user
        // confirmed they want a single sensory profile for both
        // events. Dedupe by replyId via a per-session set.
        const replyId = payload?.replyId;
        if (
          enqueued &&
          typeof replyId === "number" &&
          !user.notificationsMuted &&
          user.notifyNotesEnabled &&
          !playedReplyIdsRef.current.has(replyId)
        ) {
          playedReplyIdsRef.current.add(replyId);
          notificationPlayer.play(user.notificationSoundNote, {
            vibrate: user.vibrationEnabledNote,
          });
        }
        toast({
          title: i18n.t("notes.toast.replied.title"),
          description: i18n.t("notes.toast.replied.desc"),
        });
      },
    );

    socket.on("note_status_changed", () => {
      queryClient.invalidateQueries({ queryKey: ["notes"] });
    });

    socket.on("apps_changed", () => {
      queryClient.invalidateQueries({ queryKey: getListAppsQueryKey() });
      queryClient.invalidateQueries({ queryKey: getGetMeQueryKey() });
    });

    socket.on(
      "executive_meetings_changed",
      (payload?: { date?: string }) => {
        if (typeof payload?.date === "string" && payload.date.length > 0) {
          queryClient.invalidateQueries({
            queryKey: ["/api/executive-meetings", payload.date],
          });
        } else {
          queryClient.invalidateQueries({
            queryKey: ["/api/executive-meetings"],
          });
        }
      },
    );

    socket.on("executive_meeting_notifications_changed", () => {
      queryClient.invalidateQueries({
        queryKey: ["/api/executive-meetings/notifications"],
      });
    });

    // #277: Per-user push for the 5-min upcoming-meeting alert. The server
    // only emits this to `user:${userId}`, so receiving it means *this*
    // user (in this or another of their tabs / devices) acknowledged or
    // dismissed an alert. Invalidate the alert-state query so the open
    // alert card hides within ~1s instead of waiting on the 30s poll.
    // Other users do not receive this event, so their alert stays visible.
    socket.on(
      "executive_meeting_alert_state_changed",
      () => {
        queryClient.invalidateQueries({
          queryKey: ["/api/executive-meetings/alert-state"],
        });
      },
    );

    socket.on(
      "role_permissions_changed",
      (payload?: { roleId?: number }) => {
        queryClient.invalidateQueries({ queryKey: getGetMeQueryKey() });
        queryClient.invalidateQueries({ queryKey: getListPermissionsQueryKey() });
        queryClient.invalidateQueries({ queryKey: getListRolesQueryKey() });
        const roleId = payload?.roleId;
        if (typeof roleId === "number") {
          queryClient.invalidateQueries({
            queryKey: getGetRolePermissionsQueryKey(roleId),
          });
          queryClient.invalidateQueries({
            queryKey: getGetRolePermissionAuditQueryKey(roleId),
          });
          queryClient.invalidateQueries({
            queryKey: getGetRoleUsageQueryKey(roleId),
          });
        }
      },
    );

    return () => {
      socket.disconnect();
    };
  }, [user, queryClient]);
}