using UnityEngine.Events;
using UnityEngine.InputSystem;

namespace Syntriax.Modules.Movement.VariableMovement
{
    public class VariableMovementWithState : IVariableMovementWithState
    {
        public UnityEvent<bool> OnToggleStateChanged { get; protected set; } = null;
        private bool _enabled = false;
        public bool Enabled
        {
            get => _enabled;
            set
            {
                bool isNewValue = _enabled != value;

                _enabled = value;

                if (isNewValue)
                    OnToggleStateChanged.Invoke(value);
            }
        }
        private VMAsset _asset;
        public VMAsset Asset
        {
            get => _asset;
            set
            {
                UpdateBindings();

                _asset = value;

                Enabled = false;
            }
        }

        private IInputActionCollection _inputCollection = null;
        public IInputActionCollection InputCollection
        {
            set
            {
                if (_inputCollection == value)
                    return;

                _inputCollection = value;
                UpdateBindings();
            }
        }

        protected InputAction actionReference = null;

        public VariableMovementWithState(VMAsset asset, IInputActionCollection inputCollection)
        {
            InputCollection = inputCollection;
            OnToggleStateChanged = new UnityEvent<bool>();
            Asset = asset;
        }

        protected void Cancelled(InputAction.CallbackContext obj) => Enabled = false;
        protected void Performed(InputAction.CallbackContext obj) => Enabled = true;

        protected void UpdateBindings()
        {
            if (actionReference != null)
            {
                actionReference.performed -= Performed;
                actionReference.canceled -= Cancelled;
            }

            if (_inputCollection != null)
                foreach (InputAction action in _inputCollection)
                    if (action.name == Asset.Name)
                    {
                        actionReference = action;
                        actionReference.performed += Performed;
                        actionReference.canceled += Cancelled;
                        break;
                    }
        }
    }
}