using System;
using System.Collections;
using System.Collections.Generic;
using BITKit;
using BITKit.UX;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.Interactions;
using UnityEngine.UIElements;

namespace Net.Like.Xue.Tokyo.SNS.Demo
{
    public class FlyCameraDemo : MonoBehaviour
    {
        [SerializeField] private float initialSpeed;
        [SerializeField] private float accelerationSpeed;
        
        [SerializeField] private InputActionReference viewAction;
        [SerializeField] private InputActionReference moveAction;
        [SerializeField] private InputActionReference entryViewAction;
        [SerializeField] private InputActionReference accelerateAction;
        [SerializeField] private InputActionReference verticalAction;

        private Vector2 _inputDirection;
        private Vector2 _viewDirection;
        private float _currentAccelerate;
        private float _verticalFactor;
        private bool _isViewing;
        private bool _isAccelerated;
        private Vector3 _currentVelocity;

        [UXBindPath("sensitivity-slider")]
        private Slider _sensitivitySlider;
        [UXBindPath("open-document-button")]
        private Button _openDocumentButton;
        
        private readonly InputActionGroup _inputActionGroup = new()
        {
            allowGlobalActivation = false
        };

        private void Start()
        {
            destroyCancellationToken.Register(Dispose);

            _inputActionGroup.RegisterCallback(viewAction, OnView);
            _inputActionGroup.RegisterCallback(moveAction, OnMove);
            _inputActionGroup.RegisterCallback(entryViewAction, OnEntryView);
            _inputActionGroup.RegisterCallback(accelerateAction, OnAccelerate);
            _inputActionGroup.RegisterCallback(verticalAction, OnVertical);
            
            _inputActionGroup.allowInput.AddElement(this);
            
            UXUtils.Inject(this);

            //Quaternion.Euler(-_viewDirection.y,_viewDirection.x,0);
            var direction = MathV.TransientRotationAxis(transform.eulerAngles);
            _viewDirection.x = direction.y;
            _viewDirection.y = -direction.x;

            _openDocumentButton.clicked += () =>
            {
Application.OpenURL("https://docs.qq.com/aio/DU3NsV3J4SnNNZHdV?p=l3kba61Nvtd9jKXAeQvnQV");
            };
        }

        private void OnVertical(InputAction.CallbackContext obj)
        {
            _verticalFactor = obj.ReadValue<float>();
        }

        private void OnAccelerate(InputAction.CallbackContext obj)
        {
            _isAccelerated=obj switch
            {
                {interaction:PressInteraction,performed:true}=>true,
                {interaction:PressInteraction,canceled:true}=>false,
                _ => _isAccelerated,
            };
        }

        private void OnEntryView(InputAction.CallbackContext obj)
        {
            _isViewing = obj switch
            {
                {interaction:PressInteraction,performed:true}=>true,
                {interaction:PressInteraction,canceled:true}=>false,
                _ => _isViewing,
            };
            BITAppForUnity.AllowCursor.SetElements(0,_isViewing is false);
        }

        private void FixedUpdate()
        {
            var direction = _inputDirection;
            var velocity = transform.rotation * new Vector3(direction.x, _verticalFactor, direction.y);

            velocity *= initialSpeed * Time.deltaTime;

            _currentAccelerate = _isAccelerated ? _currentAccelerate += accelerationSpeed * Time.fixedDeltaTime : 0;

            velocity += velocity * _currentAccelerate;

            _currentVelocity = Vector3.Lerp(_currentVelocity, velocity, 16 * Time.fixedDeltaTime);

            transform.position += _currentVelocity;
        }

        private void LateUpdate()
        {
            if(_isViewing is false)return;
            transform.rotation = Quaternion.Euler(-_viewDirection.y,_viewDirection.x,0);
        }

        private void OnMove(InputAction.CallbackContext obj)
        {
            _inputDirection = obj.ReadValue<Vector2>();
        }

        private void OnView(InputAction.CallbackContext obj)
        {
            if(_isViewing is false)return;
            var value = obj.ReadValue<Vector2>() * 0.018f * _sensitivitySlider.value;
            _viewDirection.x += value.x;
            _viewDirection.y += value.y;

            _viewDirection.y = Mathf.Clamp(_viewDirection.y, -80, 80);
        }

        private void Dispose()
        {
            _inputActionGroup.Dispose();
        }
    }

}