using UnityEngine;
using Normal.Realtime;

namespace Doctopedia.Megaphone
{
    [RequireComponent(typeof(Megaphone))]
    public class MegaphoneSync : RealtimeComponent<MegaphoneModel>
    {
        Megaphone megaphone;

        private void Start()
        {
            megaphone = GetComponent<Megaphone>();
        }

        protected override void OnRealtimeModelReplaced(MegaphoneModel previousModel, MegaphoneModel currentModel)
        {
            if (previousModel != null)
            {
                // Unsubscribe from events
                previousModel.currentUserIDDidChange -= CurrentUserIDDidChange;
                previousModel.isOnDidChange -= SetOnDidChange;
            }
            if (currentModel != null)
            {
                if (!currentModel.isFreshModel)
                {
                    if (currentModel.currentUserID >= 0)
                    {
                        CurrentUserUpdatedFromModel(currentModel.currentUserID);
                    }
                    megaphone.SetOnLocal(model.isOn);
                }
                // Update the state of the component
                // Subscribe to events
                currentModel.currentUserIDDidChange += CurrentUserIDDidChange;
                currentModel.isOnDidChange += SetOnDidChange;
            }
        }

        public void SetCurrentUserID(int value)
        {
            model.currentUserID = value;
        }

        public void RemoveCurrentUser()
        {
            model.currentUserID = -1;
        }

        void CurrentUserUpdatedFromModel(int value)
        {
            if (value == -1)
                megaphone.RemoveCurrentUser();
            else
                megaphone.SetCurrentUserID(value);
        }

        private void CurrentUserIDDidChange(MegaphoneModel model, int value)
        {
            CurrentUserUpdatedFromModel(value);
        }

        private void SetOnDidChange(MegaphoneModel model, bool value)
        {
            megaphone.SetOnLocal(value);
        }

        internal void SetOn(bool value)
        {
            model.isOn = value;
        }
    }
}