using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Animancer;
using BITFALL.Entities.Equipment.Melee;
using BITFALL.Entities.Equipment.Universal.States;
using BITFALL.Entities.Inventory;
using BITFALL.Player.Inventory;
using BITKit;
using BITKit.Entities;
using BITKit.StateMachine;
using Cysharp.Threading.Tasks;
using UnityEngine;
using Draw = BITFALL.Entities.Equipment.Universal.States.Draw;

namespace BITFALL.Entities.Equipment.Universal
{
    public interface IUseState : IState
    {
    }

    public abstract class UseState : IUseState
    {
        [SerializeField] protected UniversalUseController useController;
        [SerializeField] protected AnimancerComponent animancerComponent;
        [SerializeField] protected AnimationClip[] clips;
        public virtual bool Enabled { get; set; }
        protected AnimancerState currentState;

        public virtual void Initialize()
        {

        }
        public virtual void OnStateEntry(IState old)
        {
            PlayAnimation();
        }
        public virtual void PlayAnimation()
        {
            if (clips?.Length is 0) return;
            var clip = clips.Random();
            currentState = animancerComponent.Play(clip);
            currentState.Events.OnEnd = OnPlayEnd;
        }

        public virtual void OnStateUpdate(float deltaTime)
        {
        }
        public virtual void OnStateExit(IState old, IState newState)
        {
        }

        protected virtual void OnPlayEnd()
        {
            if (currentState is { IsValid: true })
                currentState.Events.OnEnd = null;
        }
    }

    public class UniversalUseController : BITEquipBase<IUseState>
    {
        public struct Used:IProperty{}
        /// <summary>
        /// 是使用完就释放,还是连续使用
        /// </summary>
        [SerializeField] private bool release;
        [Inject] internal IPlayerInventory _playerInventory;
        [Inject] internal IPlayerEquipSelector _playerEquipSelector;
        [Inject] internal IEntityEquipmentContainer _equipmentContainer;
        public bool Release => release;
        public override void Entry()
        {
            base.Entry();
            TransitionState<Draw>();
        }
        public override void Exit()
        {
            base.Exit();
            TransitionState<Exit>();
        }
        public override void AnimationEvent(string eventName)
        {
            base.AnimationEvent(eventName);

            switch (eventName)
            {
                case BITConstant.Player.Use when CurrentState is Use:
                    var current = Item;
                    if (item.TryGetProperty<EquipmentAsSlot>(out var asSlot))
                    {
                        _equipmentContainer.TryUseEquip(asSlot.slot);
                    }
                    else
                    {
                        _inventory.UseItem(Item);
                    }
                    if (current?.Id == Item?.Id)
                        Item = null;
                    break;
            }
        }
    }
}