using System;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Unity.Cinemachine.Samples
{
    // This class receives input from a PlayerInput component and disptaches it
    // to the appropriate Cinemachine InputAxis.  The playerInput component should
    // be on the same GameObject, or specified in the PlayerInput field.
    class CustomInputHandler : InputAxisControllerBase<CustomInputHandler.Reader>
    {
        [Header("Input Source Override")]
        public PlayerInput PlayerInput;

        void Awake()
        {
            // When the PlayerInput receives an input, send it to all the controllers
            if (PlayerInput == null)
                TryGetComponent(out PlayerInput);
            if (PlayerInput == null)
                Debug.LogError("Cannot find PlayerInput component");
            else
            {
                PlayerInput.notificationBehavior = PlayerNotifications.InvokeCSharpEvents;
                PlayerInput.onActionTriggered += (value) =>
                {
                    for (var i = 0; i < Controllers.Count; i++)
                        Controllers[i].Input.ProcessInput(value.action);
                };
            }
        }

        // We process user input on the Update clock
        void Update()
        {
            if (Application.isPlaying)
                UpdateControllers();
        }

        // Controllers will be instances of this class.
        [Serializable]
        public class Reader : IInputAxisReader
        {
            public InputActionReference Input;
            Vector2 m_Value; // the cached value of the input

            public void ProcessInput(InputAction action)
            {
                // If it's my action then cache the new value
                if (Input != null && Input.action.id == action.id)
                {
                    if (action.expectedControlType == "Vector2")
                        m_Value = action.ReadValue<Vector2>();
                    else
                        m_Value.x = m_Value.y = action.ReadValue<float>();
                }
            }

            // IInputAxisReader interface: Called by the framework to read the input value
            public float GetValue(UnityEngine.Object context, IInputAxisOwner.AxisDescriptor.Hints hint)
            {
                return (hint == IInputAxisOwner.AxisDescriptor.Hints.Y ? m_Value.y : m_Value.x);
            }
        }
    }
}