using InfraredManager;
using ProjectBase.Event;
using ShotSimulator.Event;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public enum CursorType
{
    UICursor,
    DefaultCursor,
    SnipeCursor
}

public class VirtualMouse : MonoSingleton<VirtualMouse>
{
    public Vector2 screenPos = new Vector2();

    private bool m_TacticalMode;

    public bool TacticalMode
    {
        get
        {
            return m_TacticalMode;
        }
        set
        {
            m_TacticalMode = value;

            PlayerPrefs.SetInt("TacticalMode", m_TacticalMode ? 1 : 0);
        }
    }
    public Camera m_SnipeCamera;

    private EventSystem m_eventSystem;
    private PointerEventData m_pointerEvent;

    private Selectable m_excluded;
    private Selectable m_currentSelectable;
    private RaycastResult m_currentRaycastResult;

    private IPointerClickHandler m_clickHandler;
    private IDragHandler m_dragHandler;

    public override void InitManager()
    {
        base.InitManager();

        m_eventSystem = EventSystem.current;
        m_pointerEvent = new PointerEventData(m_eventSystem);
        m_pointerEvent.button = PointerEventData.InputButton.Left;

#if UNITY_ANDROID
        InfraredCameraHelper.GetInstance().OnPositionUpdate += OnPositionUpdate;
#endif
        TacticalMode = PlayerPrefs.HasKey("TacticalMode") ? PlayerPrefs.GetInt("TacticalMode") == 1 : false;
    }
    private void OnDestroy()
    {
        InfraredCameraHelper.GetInstance().OnPositionUpdate -= OnPositionUpdate;
    }
    public bool IsSelectUIObject()
    {
#if UNITY_EDITOR || UNITY_STANDALONE
        return EventSystem.current.IsPointerOverGameObject();
#else
        return m_currentSelectable != null;  
#endif
    }
    private void OnPositionUpdate(Vector2 position, Vector2 cameraLocation)
    {
        screenPos = position;
    }

    private void UpdateSnipeCameraVisualAngle()
    {
        m_SnipeCamera.transform.LookAt(Camera.main.ScreenToWorldPoint(new Vector3(screenPos.x, screenPos.y, 50)));
    }

    void Update()
    {
#if UNITY_EDITOR || UNITY_STANDALONE
        //screenPos = Input.mousePosition;
#endif
        UpdateSnipeCameraVisualAngle();

        m_pointerEvent.position = screenPos;
        List<RaycastResult> raycastResults = new List<RaycastResult>();
        m_eventSystem.RaycastAll(m_pointerEvent, raycastResults);

        // Detect selectable
        if (raycastResults.Count > 0)
        {
            foreach (var result in raycastResults)
            {
                var newSelectable = result.gameObject.GetComponentInParent<Selectable>();

                if (newSelectable && newSelectable.interactable)
                {
                    if (newSelectable != m_excluded && newSelectable != m_currentSelectable)
                    {
                        Select(newSelectable);
                        m_currentRaycastResult = result;
                    }
                    break;
                }
            }
        }
        else
        {
            if (m_currentSelectable || m_excluded)
            {
                Select(null, null);
            }
        }
        if (Input.GetKeyDown(KeyCode.Space))
        {
            OnShooting(0);
        }
    }

    public void OnShooting(float speed)
    {
        if (m_currentSelectable)
        {
            if (m_clickHandler != null)
            {
                m_clickHandler.OnPointerClick(m_pointerEvent);
                Select(null, m_currentSelectable);
            }
            else if (m_dragHandler != null)
            {
                m_pointerEvent.pointerPressRaycast = m_currentRaycastResult;
                m_dragHandler.OnDrag(m_pointerEvent);
            }
        }
    }

    void Select(Selectable s, Selectable exclude = null)
    {
        m_excluded = exclude;

        if (m_currentSelectable)
            m_currentSelectable.OnPointerExit(m_pointerEvent);

        m_currentSelectable = s;

        if (m_currentSelectable)
        {
            m_currentSelectable.OnPointerEnter(m_pointerEvent);
            m_clickHandler = m_currentSelectable.GetComponent<IPointerClickHandler>();
            m_dragHandler = m_currentSelectable.GetComponent<IDragHandler>();
        }
    }
}