import { useEffect, useState } from "react";
import { Topic, FinalSummary, Status } from "./webSocketTypes";

type UseWebSockets = {
  transcriptText: string;
  topics: Topic[];
  finalSummary: FinalSummary;
  status: Status;
};

export const useWebSockets = (transcriptId: string | null): UseWebSockets => {
  const [transcriptText, setTranscriptText] = useState<string>("");
  const [topics, setTopics] = useState<Topic[]>([]);
  const [finalSummary, setFinalSummary] = useState<FinalSummary>({
    summary: "",
  });
  const [status, setStatus] = useState<Status>({ value: "disconnected" });

  useEffect(() => {
    document.onkeyup = (e) => {
      if (e.key === "a" && process.env.NEXT_PUBLIC_ENV === "development") {
        setTranscriptText("Lorem Ipsum");
        setTopics([
          {
            id: "1",
            timestamp: 10,
            summary: "This is test topic 1",
            title: "Topic 1: Introduction to Quantum Mechanics",
            transcript:
              "A brief overview of quantum mechanics and its principles.",
          },
          {
            id: "2",
            timestamp: 20,
            summary: "This is test topic 2",
            title: "Topic 2: Machine Learning Algorithms",
            transcript:
              "Understanding the different types of machine learning algorithms.",
          },
          {
            id: "3",
            timestamp: 30,
            summary: "This is test topic 3",
            title: "Topic 3: Mental Health Awareness",
            transcript: "Ways to improve mental health and reduce stigma.",
          },
          {
            id: "4",
            timestamp: 40,
            summary: "This is test topic 4",
            title: "Topic 4: Basics of Productivity",
            transcript: "Tips and tricks to increase daily productivity.",
          },
          {
            id: "5",
            timestamp: 50,
            summary: "This is test topic 5",
            title: "Topic 5: Future of Aviation",
            transcript:
              "Exploring the advancements and possibilities in aviation.",
          },
        ]);

        setFinalSummary({ summary: "This is the final summary" });
      }
    };

    if (!transcriptId) return;

    const url = `${process.env.NEXT_PUBLIC_WEBSOCKET_URL}/v1/transcripts/${transcriptId}/events`;
    const ws = new WebSocket(url);

    ws.onopen = () => {
      console.debug("WebSocket connection opened");
    };

    ws.onmessage = (event) => {
      const message = JSON.parse(event.data);

      switch (message.event) {
        case "TRANSCRIPT":
          if (message.data.text) {
            setTranscriptText(
              (message.data.translation ?? message.data.text ?? "").trim(),
            );
            console.debug("TRANSCRIPT event:", message.data);
          }
          break;

        case "TOPIC":
          setTopics((prevTopics) => [...prevTopics, message.data]);
          console.debug("TOPIC event:", message.data);
          break;

        case "FINAL_SUMMARY":
          if (message.data) {
            setFinalSummary(message.data);
            console.debug("FINAL_SUMMARY event:", message.data);
          }
          break;

        case "STATUS":
          setStatus(message.data);
          break;

        default:
          console.error("Unknown event:", message.event);
      }
    };

    ws.onerror = (error) => {
      console.error("WebSocket error:", error);
    };

    ws.onclose = () => {
      console.debug("WebSocket connection closed");
    };

    return () => {
      ws.close();
    };
  }, [transcriptId]);

  return { transcriptText, topics, finalSummary, status };
};