using AibisDream.Framework;
using UnityEngine;

namespace AibisDream
{
    public class LineAdvanceInput : MonoBehaviour
    {
        #region 状态

        private bool _inGame;
        private bool _isDialog;
        private LineSyncToken _curSyncToken;

        #endregion
        
        [SerializeField] private KeyCode advanceKey;

        private void OnEnable()
        {
            RegisterEvents();
        }

        private void OnDisable()
        {
            UnRegisterEvents();
        }
        
        public void RunLine(LineSyncToken lineSyncEvent)
        {
            _curSyncToken = lineSyncEvent;
        }

        private bool IsInputAvailable()
        {
            return _inGame && _isDialog && _curSyncToken != null && _curSyncToken.state != LineSyncState.Advanced;
        }

        private void OnAdvanceInput()
        {
            if (!IsInputAvailable())
            {
                return;
            }

            switch (_curSyncToken.state)
            {
                case LineSyncState.PlayText:
                    _curSyncToken.TrySkip();
                    break;
                case LineSyncState.WaitForAdvance:
                    _curSyncToken.TryAdvance();
                    break;
            }
        }

        private void Update()
        {
            if (Input.GetMouseButtonDown(0) || Input.GetKeyDown(KeyCode.Space))
            {
                OnAdvanceInput();
            }
        }

        #region 事件处理

        private IUnRegister[] _unRegisters;

        private void RegisterEvents()
        {
            _unRegisters = new IUnRegister[6];

            _unRegisters[0] = EnumEventSystem.Global.Register(GameLoopEnum.GameStart, () => _inGame = true);
            _unRegisters[1] = EnumEventSystem.Global.Register(GameLoopEnum.UnPauseGame, () => _inGame = true);

            _unRegisters[2] = EnumEventSystem.Global.Register(GameLoopEnum.GameQuit, () => _inGame = false);
            _unRegisters[3] = EnumEventSystem.Global.Register(GameLoopEnum.PauseGame, () => _inGame = false);

            _unRegisters[4] = EnumEventSystem.Global.Register(InteractionEventEnum.DialogStart, () => _isDialog = true);
            _unRegisters[5] = EnumEventSystem.Global.Register(InteractionEventEnum.DialogEnd, () => _isDialog = true);
        }

        private void UnRegisterEvents()
        {
            foreach (var unRegister in _unRegisters)
            {
                unRegister.UnRegister();
            }
        }

        #endregion
    }
}