using SepCore.InputModule;
using UnityEngine;
using UnityEngine.EventSystems;

namespace SepCore.InputModule.Runtime.VirtualInput
{
    public sealed class VirtualButtonBridge : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
    {
        [SerializeField] private InputActionId _actionId;
        [SerializeField] private InputContextId _contextId = InputContextId.GameplayExplore;
        [SerializeField] private bool _injectDeviceKind = true;
        [SerializeField] private InputModuleComponent _inputModule;

        public void OnPointerDown(PointerEventData eventData)
        {
            Inject(InputCommandPhase.Started);
            Inject(InputCommandPhase.Performed);

            if (_injectDeviceKind)
            {
                TryForceDeviceKind();
            }
        }

        public void OnPointerUp(PointerEventData eventData)
        {
            Inject(InputCommandPhase.Canceled);
        }

        private void Inject(InputCommandPhase phase)
        {
            InputModuleComponent inputModule = GetInputModule();
            if (inputModule == null || !inputModule.IsInitialized)
            {
                return;
            }

            float scalar = phase == InputCommandPhase.Performed ? 1f : 0f;
            var command = new InputCommand(
                _actionId,
                _contextId,
                phase,
                InputDeviceKind.Touch,
                Vector2.zero,
                scalar,
                Time.time);

            inputModule.InjectCommand(command);
        }

        private void TryForceDeviceKind()
        {
            InputModuleComponent inputModule = GetInputModule();
            if (inputModule == null || !inputModule.IsInitialized)
            {
                return;
            }

            inputModule.ForceDeviceKind(InputDeviceKind.Touch);
        }

        private InputModuleComponent GetInputModule()
        {
            if (_inputModule != null)
            {
                return _inputModule;
            }

            _inputModule = FindObjectOfType<InputModuleComponent>();
            return _inputModule;
        }
    }
}