import { ref, watch, type ComputedRef } from "vue";
import { useQuery, useMutation } from "@vue/apollo-composable";
import {
  FeedQueryDocument,
  UpdateFeedDecisionMutationDocument,
  CreateCalendarEventMutationDocument,
  CreateCommunicationMutationDocument,
  LogPilotNoteMutationDocument,
  CalendarQueryDocument,
  CommunicationsQueryDocument,
  ContactInboxesQueryDocument,
  ChatMessagesQueryDocument,
  ChatConversationsQueryDocument,
} from "~~/graphql/generated";
import type { FeedCard, CalendarEvent } from "~/composables/crm-types";
import { dayKey, formatDay, formatTime } from "~/composables/crm-types";

export function useFeed(opts: {
  apolloAuthReady: ComputedRef<boolean>;
  onCreateFollowup: (card: FeedCard, event: CalendarEvent) => void;
  onOpenComm: (card: FeedCard) => void;
}) {
  const { result: feedResult, refetch: refetchFeed } = useQuery(
    FeedQueryDocument,
    null,
    { enabled: opts.apolloAuthReady },
  );

  const { mutate: doUpdateFeedDecision } = useMutation(UpdateFeedDecisionMutationDocument, {
    refetchQueries: [{ query: FeedQueryDocument }],
  });
  const { mutate: doCreateCalendarEvent } = useMutation(CreateCalendarEventMutationDocument, {
    refetchQueries: [{ query: CalendarQueryDocument }],
  });
  const { mutate: doCreateCommunication } = useMutation(CreateCommunicationMutationDocument, {
    refetchQueries: [{ query: CommunicationsQueryDocument }, { query: ContactInboxesQueryDocument }],
  });
  const { mutate: doLogPilotNote } = useMutation(LogPilotNoteMutationDocument);

  const feedCards = ref<FeedCard[]>([]);

  watch(() => feedResult.value?.feed, (v) => {
    if (v) feedCards.value = v as FeedCard[];
  }, { immediate: true });

  function pushPilotNote(text: string) {
    doLogPilotNote({ text })
      .then(() => {})
      .catch(() => {});
  }

  async function executeFeedAction(card: FeedCard) {
    const key = card.proposal.key;
    if (key === "create_followup") {
      const start = new Date();
      start.setMinutes(start.getMinutes() + 30);
      start.setSeconds(0, 0);
      const end = new Date(start);
      end.setMinutes(end.getMinutes() + 30);

      const res = await doCreateCalendarEvent({
        input: {
          title: `Follow-up: ${card.contact.split(" ")[0] ?? "Contact"}`,
          start: start.toISOString(),
          end: end.toISOString(),
          contact: card.contact,
          note: "Created from feed action.",
        },
      });
      const created = res?.data?.createCalendarEvent as CalendarEvent | undefined;
      if (created) {
        opts.onCreateFollowup(card, created);
      }

      return `Event created: Follow-up · ${formatDay(start.toISOString())} ${formatTime(start.toISOString())} · ${card.contact}`;
    }

    if (key === "open_comm") {
      opts.onOpenComm(card);
      return `Opened ${card.contact} communication thread.`;
    }

    if (key === "call") {
      await doCreateCommunication({
        input: {
          contact: card.contact,
          channel: "Phone",
          kind: "call",
          direction: "out",
          text: "Call started from feed",
          durationSec: 0,
        },
      });
      opts.onOpenComm(card);
      return `Call event created and ${card.contact} chat opened.`;
    }

    if (key === "draft_message") {
      await doCreateCommunication({
        input: {
          contact: card.contact,
          channel: "Email",
          kind: "message",
          direction: "out",
          text: "Draft: onboarding plan + two slots for tomorrow.",
        },
      });
      opts.onOpenComm(card);
      return `Draft message added to ${card.contact} communications.`;
    }

    if (key === "run_summary") {
      return "Call summary prepared: 5 next steps sent to Pilot.";
    }

    if (key === "prepare_question") {
      await doCreateCommunication({
        input: {
          contact: card.contact,
          channel: "Telegram",
          kind: "message",
          direction: "out",
          text: "Draft: can you confirm your decision date for this cycle?",
        },
      });
      opts.onOpenComm(card);
      return `Question about decision date added to ${card.contact} chat.`;
    }

    return "Action completed.";
  }

  async function decideFeedCard(card: FeedCard, decision: "accepted" | "rejected") {
    card.decision = decision;

    if (decision === "rejected") {
      const note = "Rejected. Nothing created.";
      card.decisionNote = note;
      await doUpdateFeedDecision({ id: card.id, decision: "rejected", decisionNote: note });
      pushPilotNote(`[${card.contact}] recommendation rejected: ${card.proposal.title}`);
      return;
    }

    const result = await executeFeedAction(card);
    card.decisionNote = result;
    await doUpdateFeedDecision({ id: card.id, decision: "accepted", decisionNote: result });
    pushPilotNote(`[${card.contact}] ${result}`);
  }

  return {
    feedCards,
    decideFeedCard,
    executeFeedAction,
    pushPilotNote,
    refetchFeed,
  };
}