import { useEffect } from 'react';
import { Task } from 'fhir/r4';
import { usePatientServiceContext, useWebSocketServiceContext } from '../services';

interface UseTaskWebSocketOptions {
    task?: Task;
    taskId?: string;
    isOpen?: boolean;
    onUpdate: (task: Task) => void;
    onDelete: () => void;
}

export const useFhirTaskTargetedBroadcast = ({
                                                 task,
                                                 taskId,
                                                 isOpen = true,
                                                 onUpdate,
                                                 onDelete
                                             }: UseTaskWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

    useEffect(() => {
        if (!patientState || !task || !isOpen) {
            return;
        }

        const handleTaskEvent = (cloudEvent: any) => {
            const taskPayload: Task = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = taskId || task.id;

            if (taskPayload.id === targetId) {
                switch (eventType) {
                    case 'com.akashichealthrecords.fhir.task.updated':
                        onUpdate(taskPayload);
                        break;
                    case 'com.akashichealthrecords.fhir.task.deleted':
                        onDelete();
                        break;
                }
            }
        };

        subscribe('com.akashichealthrecords.fhir.task.updated', handleTaskEvent);
        subscribe('com.akashichealthrecords.fhir.task.deleted', handleTaskEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.task.updated', handleTaskEvent);
            unsubscribe('com.akashichealthrecords.fhir.task.deleted', handleTaskEvent);
        };
    }, [patientState, task, taskId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};