import { ref, computed, watch, type ComputedRef } from "vue";
import { useQuery } from "@vue/apollo-composable";
import { GetClientTimelineQueryDocument } from "~~/graphql/generated";

import type { CommItem } from "~/composables/useContacts";
import type { CalendarEvent } from "~/composables/useCalendar";
import type { FeedCard } from "~/composables/useFeed";
import type { WorkspaceDocument } from "~/composables/useDocuments";

export type ClientTimelineItem = {
  id: string;
  contactId: string;
  contentType: "message" | "calendar_event" | "document" | "recommendation" | string;
  contentId: string;
  datetime: string;
  message?: CommItem | null;
  calendarEvent?: CalendarEvent | null;
  recommendation?: FeedCard | null;
  document?: WorkspaceDocument | null;
};

export function useTimeline(opts: { apolloAuthReady: ComputedRef<boolean> }) {
  const timelineContactId = ref("");
  const timelineLimit = ref(500);

  const { result: timelineResult, refetch: refetchTimeline } = useQuery(
    GetClientTimelineQueryDocument,
    () => ({ contactId: timelineContactId.value, limit: timelineLimit.value }),
    { enabled: computed(() => !!timelineContactId.value && opts.apolloAuthReady.value) },
  );

  const clientTimelineItems = ref<ClientTimelineItem[]>([]);

  watch(() => timelineResult.value?.getClientTimeline, (v) => {
    if (v) clientTimelineItems.value = v as ClientTimelineItem[];
  }, { immediate: true });

  async function loadClientTimeline(contactId: string, limit = 500) {
    const normalizedContactId = String(contactId ?? "").trim();
    if (!normalizedContactId) {
      clientTimelineItems.value = [];
      timelineContactId.value = "";
      return;
    }

    timelineContactId.value = normalizedContactId;
    timelineLimit.value = limit;
    await refetchTimeline();
  }

  async function refreshSelectedClientTimeline(selectedCommThreadId: string) {
    const contactId = String(selectedCommThreadId ?? "").trim();
    if (!contactId) {
      clientTimelineItems.value = [];
      return;
    }
    await loadClientTimeline(contactId);
  }

  return {
    clientTimelineItems,
    timelineContactId,
    timelineLimit,
    loadClientTimeline,
    refreshSelectedClientTimeline,
    refetchTimeline,
  };
}