using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine.UI;
using UnityEngine.Events;

public class InputControlManager : MonoBehaviour
{
    //*********************//
    // Public member data  //
    //*********************//
    public bool IsUsingJoystick;

    public static event UnityAction OnControllerInput;
    public static event UnityAction OnKeyboardOrMouseInput;

    [HideInInspector] public bool _verticalButtonDpadIsPressedDown;
    [HideInInspector] public bool _horizontalButtonDpadUpIsPressedDown;
    [HideInInspector] public bool upDpadVerticalButton;
    [HideInInspector] public bool downDpadVericalButton;

    [HideInInspector] public bool hideAllSelectedItemHighlights;

    private bool GameStartedUpdate = true;

    private static InputControlManager _instance;
    public static InputControlManager Getinstance() { return _instance; }

    public void Awake()
    {
        if (!_instance)
        {
            _instance = this;
        }
    }

    private void Start()
    {
        // Check if there is any input from a controller
        if (Input.GetJoystickNames().Length > 0)
        {
            // Controller is connected
            OnControllerInput?.Invoke();
            m_State = eInputState.Controler;
            GameStartedUpdate = false;
            Debug.Log("Controller connected!");
        }
        else
        {
            // No controller connected
            OnKeyboardOrMouseInput?.Invoke();
            m_State = eInputState.MouseKeyboard;
            GameStartedUpdate = false;
            Debug.Log("No controller detected.");
        }
    }

    public void CursorVisibilityUpdater()
    {
        if (IsUsingJoystick)
        {
            Cursor.visible = false;
            Cursor.lockState = CursorLockMode.Locked;
        }
        else
        {
            Cursor.visible = true;
            Cursor.lockState = CursorLockMode.Confined;
        }
    }

    public void CursorVisibility(bool cursorVisible) 
    {
        if (cursorVisible) 
        {
            Cursor.visible = true;
            Cursor.lockState = CursorLockMode.Confined;
        }
        else 
        {
            Cursor.visible = false;
            Cursor.lockState = CursorLockMode.Locked;
        }
    }

    //*********************//
    // Private member data //
    //*********************//

    public enum eInputState
    {
        MouseKeyboard,
        Controler
    };
    private eInputState m_State = eInputState.MouseKeyboard;

    //*************************//
    // Unity member methods    //
    //*************************//

    void OnGUI()
    {
        switch (m_State)
        {
            case eInputState.MouseKeyboard:
                if (isControlerInput())
                {
                    IsUsingJoystick = true;
                    m_State = eInputState.Controler;
                    OnControllerInput?.Invoke();
                    Debug.Log("JoyStick being used");
                }
                break;
            case eInputState.Controler:
                if (isMouseKeyboard())
                {
                    IsUsingJoystick = false;
                    m_State = eInputState.MouseKeyboard;
                    OnKeyboardOrMouseInput?.Invoke();
                    Debug.Log("Mouse & Keyboard being used");
                }
                break;
        }
    }

    //***************************//
    // Public member methods     //
    //***************************//

    public eInputState GetInputState()
    {
        return m_State;
    }

    //****************************//
    // Private member methods     //
    //****************************//

    private bool isMouseKeyboard()
    {
        // mouse & keyboard buttons
        if (Event.current.isKey ||
            Event.current.isMouse)
        {
            return true;
        }
        // mouse movement
        if (Input.GetAxis("Mouse X") != 0.0f ||
            Input.GetAxis("Mouse Y") != 0.0f)
        {
            return true;
        }

        if (GameStartedUpdate)
        {
            if (Input.GetJoystickNames().Length > 0)
            {
                return false;
            }           
        }

        return false;
    }

    private bool isControlerInput()
    {
        // joystick buttons
        if (Input.GetKey(KeyCode.Joystick1Button0) ||
           Input.GetKey(KeyCode.Joystick1Button1) ||
           Input.GetKey(KeyCode.Joystick1Button2) ||
           Input.GetKey(KeyCode.Joystick1Button3) ||
           Input.GetKey(KeyCode.Joystick1Button4) ||
           Input.GetKey(KeyCode.Joystick1Button5) ||
           Input.GetKey(KeyCode.Joystick1Button6) ||
           Input.GetKey(KeyCode.Joystick1Button7) ||
           Input.GetKey(KeyCode.Joystick1Button8) ||
           Input.GetKey(KeyCode.Joystick1Button9) ||
           Input.GetKey(KeyCode.Joystick1Button10) ||
           Input.GetKey(KeyCode.Joystick1Button11) ||
           Input.GetKey(KeyCode.Joystick1Button12) ||
           Input.GetKey(KeyCode.Joystick1Button13) ||
           Input.GetKey(KeyCode.Joystick1Button14) ||
           Input.GetKey(KeyCode.Joystick1Button15) ||
           Input.GetKey(KeyCode.Joystick1Button16) ||
           Input.GetKey(KeyCode.Joystick1Button17) ||
           Input.GetKey(KeyCode.Joystick1Button18) ||
           Input.GetKey(KeyCode.Joystick1Button19))
        {
            return true;
        }

        // joystick axis
        if (Input.GetAxis("Joystick Horizontal") != 0.0f ||
           Input.GetAxis("Joystick Vertical") != 0.0f ||
           Input.GetAxis("LeftTrigger") != 0.0f ||
           Input.GetAxis("RightTrigger") != 0.0f ||
           Input.GetAxis("Joystick X") != 0.0f ||
           Input.GetAxis("Joystick Y") != 0.0f ||
           Input.GetAxis("DpadVertical") != 0.0f ||
           Input.GetAxis("DpadHorizontal") != 0.0f)
        {
            return true;
        }

        if (GameStartedUpdate)
        {
            if (Input.GetJoystickNames().Length > 0)
            {
                return true;
            }
        }

        return false;
    }

    //public void SelectedMenuItemHideAll(ref List<GameObject> selectedMenuItem)
    //{
    //    if (hideAllSelectedItemHighlights)
    //    {
    //        for (int i = 0; i < selectedMenuItem.Count; i++)
    //        {
    //            selectedMenuItem[i].SetActive(false);
    //            if (i == selectedMenuItem.Count)
    //            {
    //                hideAllSelectedItemHighlights = false;
    //            }
    //        }
    //    }
    //}

    public void SelectedMenuItemHideAll(ref GameObject[] selectedMenuItem) 
    {
        //if (hideAllSelectedItemHighlights)
        //{
            for (int i = 0; i < selectedMenuItem.Length; i++)
            {
                selectedMenuItem[i].SetActive(false);
                if(i == selectedMenuItem.Length) 
                {
                    hideAllSelectedItemHighlights = false;
                }
            }
        //}
    }

    public void SelectedMenuItemUpdate(ref GameObject[] selectedMenuItem, int ActiveItem)
    {
        //if (_verticalButtonDpadIsPressedDown)
        //{
            for (int i = 0; i < selectedMenuItem.Length; i++)
            {
                if (i == ActiveItem)
                {
                    selectedMenuItem[i].SetActive(true);
                }
                else
                {
                    selectedMenuItem[i].SetActive(false);
                }
            }
        //}
    }

    public void DpadNavigateVertical(ref int CurrentSelectedItemIndex, int selectedItemIndexLast)
    {
        if (Input.GetAxis("dpadVertical") > 0 && !_verticalButtonDpadIsPressedDown)
        {
            CurrentSelectedItemIndex -= 1;
            print("dpadVertical UP");
            if (CurrentSelectedItemIndex == -1)
            {
                CurrentSelectedItemIndex = selectedItemIndexLast;
            }
            if (_verticalButtonDpadIsPressedDown == false)
            {
                _verticalButtonDpadIsPressedDown = true;
            }
            upDpadVerticalButton = true;
        }
        else if (Input.GetAxis("dpadVertical") < 0 && !_verticalButtonDpadIsPressedDown)
        {
            CurrentSelectedItemIndex += 1;
            print("dpadVertical DOWN");
            if (CurrentSelectedItemIndex == selectedItemIndexLast + 1)
            {
                CurrentSelectedItemIndex = 0;
            }
            if (_verticalButtonDpadIsPressedDown == false)
            {
                _verticalButtonDpadIsPressedDown = true;
            }
            downDpadVericalButton = true;
        }
        else if (Input.GetAxis("dpadVertical") == 0)
        {
            _verticalButtonDpadIsPressedDown = false;
            upDpadVerticalButton = false;
            downDpadVericalButton = false;
        }
    }

    public void DpadNavigateHorizontal(ref int CurrentSelectedItemIndex, int selectedItemIndexLast)
    {
        if (Input.GetAxis("dpadHorizontal") > 0 && !_horizontalButtonDpadUpIsPressedDown)
        {
            CurrentSelectedItemIndex += 1;
            print("dpadHorizontal right");
            if (CurrentSelectedItemIndex == selectedItemIndexLast + 1)
            {
                CurrentSelectedItemIndex = 0;
            }
            _horizontalButtonDpadUpIsPressedDown = true;
        }
        else if (Input.GetAxis("dpadHorizontal") < 0 && !_horizontalButtonDpadUpIsPressedDown)
        {
            CurrentSelectedItemIndex -= 1;
            print("dpadHorizontal Left");
            if (CurrentSelectedItemIndex == -1)
            {
                CurrentSelectedItemIndex = selectedItemIndexLast;
            }
            _horizontalButtonDpadUpIsPressedDown = true;
        }
        else if (Input.GetAxis("dpadHorizontal") == 0)
        {
            _horizontalButtonDpadUpIsPressedDown = false;
        }
    }

    public void DpadNavigateHorizontalButtonPress(Button buttonLeft, Button buttonRight)
    {
        if (Input.GetAxis("dpadHorizontal") > 0 && !_horizontalButtonDpadUpIsPressedDown)
        {
            buttonRight.onClick.Invoke();
            print("dpadHorizontal right");
            _horizontalButtonDpadUpIsPressedDown = true;
        }
        else if (Input.GetAxis("dpadHorizontal") < 0 && !_horizontalButtonDpadUpIsPressedDown)
        {
            buttonLeft.onClick.Invoke();
            print("dpadHorizontal Left");
            _horizontalButtonDpadUpIsPressedDown = true;
        }
        else if (Input.GetAxis("dpadHorizontal") == 0)
        {
            _horizontalButtonDpadUpIsPressedDown = false;
        }
    }

    public void DpadHorizontalSliderValuesUpdate(Slider slider, float speed)
    {
        if (Input.GetAxis("dpadHorizontal") > 0)
        {
            slider.value += speed;
        }
        else if (Input.GetAxis("dpadHorizontal") < 0)
        {
            slider.value -= speed;
        }
    }

    public void DpadHorizontalSliderInvertedValuesUpdate(Slider slider, float speed)
    {
        if (Input.GetAxis("dpadHorizontal") > 0)
        {
            slider.value -= speed;
        }
        else if (Input.GetAxis("dpadHorizontal") < 0)
        {
            slider.value += speed;
        }
    }
}