using Assets.Scripts.Actions.Interfaces;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using UnityEngine;
using UnityEngine.AI;

public class BlockingAnimation : Attribute
{

}
public enum Tasks { Move, Interact, Rotate };
public enum TaskStatus { Waiting, InProgress, Complete };
public enum AnimationStates
{
    [EnumMember(Value = "Idle")]
    Idle,
    [EnumMember(Value = "Move")]
    Walking,
    [EnumMember(Value = "Sleeping")]
    Sleeping,
    [EnumMember(Value = "StandToSit")]
    [BlockingAnimation]
    Sitting,
    [EnumMember(Value = "SitToStand")]
    [BlockingAnimation]
    Standing
};

public class Player : MonoBehaviour
{
    public static Player Instance { get; private set; }

    [SerializeField]
    public NavMeshAgent _navAgent;
    [SerializeField]
    public Animator _animator;

    [SerializeField]
    private Transform _holdPoint;

    private AnimationStates _currentAnimation;
    private Vector3 _groundDeltaPosition;

    public Dictionary<StatsId, Stat> Stats;
    public IWorkPlace WorkPlace { get; set; }

    private readonly Queue<PlayerTasks> _tasks = new Queue<PlayerTasks>();
    private PlayerTasks _currentTask;

    private const string WALK_VELOCITY = "WalkVelocity";

    private FoodObject _foodObject;

    private void Awake()
    {
        if (Instance != null)
        {
            Debug.Log("There's more than one player instance");
            return;
        }
        Instance = this;
    }
    private void Start()
    {
        TimeManager.OnMinuteChanged += UpdateStatsByClock;
        _navAgent.updatePosition = false;
        Stats = PlayerStats.CreateInitialStats();
    }

    private void OnDestroy()
    {
        TimeManager.OnMinuteChanged -= UpdateStatsByClock;
    }

    private void Update()
    {
        if (IsBlockingAnimation(_currentAnimation))
        {
            if (IsAnimationStatePlaying(0, GetEnumMemberValue(_currentAnimation)))
                return;
        }

        if (_currentTask == null || _currentTask.Status == TaskStatus.Complete)
        {
            _tasks.TryDequeue(out _currentTask);
        }
        if (_currentTask != null)
        {
            if (_currentTask.Status == TaskStatus.Waiting)
                Debug.Log($"Current task {_currentTask.Task}");
            switch (_currentTask.Task)
            {
                case Tasks.Rotate:
                    _currentTask.UpdateStatus(Rotate(_currentTask.TagretObject._playerArrivePoint.forward));
                    break;
                case Tasks.Move:
                    if (_currentAnimation == AnimationStates.Sitting)
                    {
                        SetPlayerAnimation(AnimationStates.Standing);
                        return;
                    }
                    _navAgent.SetDestination(_currentTask.TagretObject._playerArrivePoint.position);
                    _currentTask.UpdateStatus(MoveToPoint());
                    break;
                case Tasks.Interact:
                    if (pathComplete(_currentTask.TagretObject._playerArrivePoint.position))
                        _currentTask.UpdateStatus(InteractWithObject(_currentTask.TagretObject));
                    else
                    {
                        AddTask(new PlayerTasks(Tasks.Move, _currentTask.TagretObject));
                        AddTask(new PlayerTasks(Tasks.Rotate, _currentTask.TagretObject));
                        AddTask(_currentTask);
                        _currentTask = null;
                    }
                    break;
            }
        }
    }

    private TaskStatus MoveToPoint()
    {
        SetPlayerAnimation(AnimationStates.Walking);

        var worldDeltaPosition = _navAgent.nextPosition - transform.position;
        _groundDeltaPosition.x = Vector3.Dot(transform.right, worldDeltaPosition);
        _groundDeltaPosition.y = Vector3.Dot(transform.forward, worldDeltaPosition);

        Vector2 velocity = (Time.deltaTime > 1e-5f) ? _groundDeltaPosition / Time.deltaTime : Vector2.zero;
        _animator.SetFloat(WALK_VELOCITY, velocity.y);

        return pathComplete(_navAgent.destination) ? TaskStatus.Complete : TaskStatus.InProgress;
    }

    private bool pathComplete(Vector3 destination)
    {
        if (Vector3.Distance(destination, _navAgent.transform.position) <= _navAgent.radius)
        {
            if (!_navAgent.hasPath || _navAgent.velocity.sqrMagnitude < 0.2f)
            {
                SetPlayerAnimation(AnimationStates.Idle);
                return true;
            }
        }

        return false;
    }

    public TaskStatus Rotate(Vector3 target)
    {
        var targetRot = Quaternion.LookRotation(target);
        Quaternion rotation = Quaternion.Slerp(transform.rotation, Quaternion.LookRotation(target), 10 * Time.deltaTime);
        rotation.x = 0;
        transform.rotation = rotation;
        if (IsApproximate(targetRot, transform.rotation, 0.000004f))
        {
            return TaskStatus.Complete;
        }
        return TaskStatus.InProgress;
    }

    public static bool IsApproximate(Quaternion q1, Quaternion q2, float precision)
    {
        return Mathf.Abs(Quaternion.Dot(q1, q2)) >= 1 - precision;
    }

    private TaskStatus InteractWithObject(BaseInteractableObject interactableObject)
    {
        interactableObject.Interact(this);
        return TaskStatus.Complete;
    }

    public void SetPlayerAnimation(AnimationStates newState)
    {
        if (newState == _currentAnimation)
        {
            return;
        }
        _animator.Play(GetEnumMemberValue(newState));
        _currentAnimation = newState;
    }

    private bool IsAnimationStatePlaying(int animLayer, string stateName)
    {
        if (_animator.GetCurrentAnimatorStateInfo(animLayer).IsName(stateName) &&
                _animator.GetCurrentAnimatorStateInfo(animLayer).normalizedTime < 1.0f)
            return true;
        else
            return false;
    }

    private void OnAnimatorMove()
    {
        transform.position = _navAgent.nextPosition;
    }

    public void AddTask(PlayerTasks task)
    {
        _tasks.Enqueue(task);
    }

    public void UpdateStatsByClock()
    {
        Stats[StatsId.Food].deduct(0.034m); // 48 hours it's 100, 100/2880=~0.034 per minute
        if (_currentAnimation != AnimationStates.Sleeping)
        {
            Stats[StatsId.Energy].deduct(0.1m); // 24 hours it's 100, 100/1440=~0.096 per minute
        }
        else
        {
            Stats[StatsId.Energy].increase(1m);

        }
    }

    public void BuyAction(IPlayerAction action)
    {
        Stats[StatsId.Money].deduct(((ISellable)action).Price);
        action.ApplyAction(this);
    }

    private static string GetEnumMemberValue<T>(T value)
    where T : struct, IConvertible
    {
        return typeof(T)
            .GetTypeInfo()
            .DeclaredMembers
            .SingleOrDefault(x => x.Name == value.ToString())
            ?.GetCustomAttribute<EnumMemberAttribute>(false)
            ?.Value;
    }
    private static bool IsBlockingAnimation<T>(T value)
    where T : struct, IConvertible
    {
        var enumType = typeof(T);
        var memInfo = enumType.GetMember(value.ToString());
        var attr = memInfo.FirstOrDefault()?.GetCustomAttributes(false).OfType<BlockingAnimation>().FirstOrDefault();
        return attr != null;
    }


    public void SetFoodObject(FoodObject foodObject)
    {
        foodObject.transform.parent = _holdPoint;
        foodObject.transform.localPosition = Vector3.zero;
        _foodObject = foodObject;
        Debug.Log($"player hold {foodObject.GetFoodObjectSO().name}");

    }
    public FoodObject GetFoodObject()
    {
        return _foodObject;
    }
    public void ClearFoodObject()
    {
        Destroy(_foodObject.gameObject);
        _foodObject = null;
    }

    public bool HasFoodObject()
    {
        return _foodObject != null;
    }
}