using System.Collections.Generic;
using Cielonos.MainGame.Inventory;
using Cielonos.MainGame.UI;
using SLSUtilities.General;
using SLSUtilities.FunctionalAnimation;
using UnityEngine;

namespace Cielonos.MainGame.Characters
{
    public partial class PlayerInventorySubcontroller
    {
        public partial class EquipmentSubmodule : SubmoduleBase<PlayerInventorySubcontroller>
        {
            public List<MainWeaponBase> preparedMainWeapons;
            public MainWeaponBase currentMainWeapon;
            public List<SupportEquipmentBase> currentSupportEquipments;

            public EquipmentSubmodule(PlayerInventorySubcontroller owner) : base(owner)
            {
                preparedMainWeapons = new List<MainWeaponBase>();
                currentSupportEquipments = new List<SupportEquipmentBase>(4) { null, null, null, null };
            }
        }

        #region Main Weapon

        public partial class EquipmentSubmodule
        {
            public void PrepareMainWeapon(MainWeaponBase weaponToPrepare)
            {
                if (!preparedMainWeapons.Contains(weaponToPrepare))
                {
                    preparedMainWeapons.Add(weaponToPrepare);
                }
            }

            public void EquipMainWeapon(MainWeaponBase newWeapon)
            {
                PlayerAnimationSubcontroller animSc = owner.player.animationSc;
                // 停止当前动画到 Empty，确保后续 Rebind 发生在无动画播放的安全状态
                animSc.fullBodyFuncAnimSm.Stop(DisruptionType.Must, 0f);
                
                currentMainWeapon = newWeapon;
                
                // 开启批处理——后续所有 clip 替换积压到缓冲区
                animSc.BeginOverrideBatch();
                
                // 注册武器动画 clip（全部进入缓冲区，不触发 Rebind）
                // OnEquipped：含 SetUp（同样进入缓冲区），内部调用 FlushOverrideBatch 关闭内层
                currentMainWeapon.OnEquipped();
                
                // 兜底 Flush：若 OnEquipped 未调用 Flush（如 Yasha 不调 base），在此统一提交
                animSc.FlushOverrideBatch();

                PlayerCanvas.MainWeaponUIArea.Initialize(newWeapon);
                (owner.player.eventSm as PlayerEventSubmodule)?.onMainWeaponChanged.Invoke(newWeapon);
            }

            public void RemoveMainWeapon()
            {
                Debug.Log("Unequipping main weapon: " + currentMainWeapon);
                currentMainWeapon.OnUnequipped();
                currentMainWeapon = null;
            }
        }

        #endregion

        #region Support Equipment

        public partial class EquipmentSubmodule
        {
            public void EquipSupportEquipment(SupportEquipmentBase newEquipment, int slotIndex)
            {
                if (slotIndex < 0 || slotIndex >= 4)
                {
                    Debug.LogWarning("Invalid support equipment slot index: " + slotIndex);
                    return;
                }

                //如果当前槽位没有足够的空间，扩展列表
                if (currentSupportEquipments.Count <= slotIndex)
                {
                    while (currentSupportEquipments.Count <= slotIndex)
                    {
                        currentSupportEquipments.Add(null);
                    }
                }

                //卸下当前装备（如果有的话）
                if (currentSupportEquipments[slotIndex] != null)
                {
                    currentSupportEquipments[slotIndex].OnUnequipped();
                }

                currentSupportEquipments[slotIndex] = newEquipment;
                
                // 批处理 SupportEquipment 的动画 clip 替换
                PlayerAnimationSubcontroller animSc = owner.player.animationSc;
                animSc.BeginOverrideBatch();
                newEquipment.OnEquipped();
                animSc.FlushOverrideBatch();

                PlayerCanvas.SupportEquipmentsUIArea.Initialize(newEquipment, slotIndex);
            }

            public void RemoveSupportEquipment(SupportEquipmentBase equipmentToRemove)
            {
                int slotIndex = currentSupportEquipments.IndexOf(equipmentToRemove);

                if (slotIndex != -1)
                {
                    equipmentToRemove.OnUnequipped();
                    currentSupportEquipments[slotIndex] = null;

                    PlayerCanvas.SupportEquipmentsUIArea.Remove(slotIndex);
                }
            }

            public void RemoveSupportEquipment(int slotIndex)
            {
                if (slotIndex < 0 || slotIndex >= currentSupportEquipments.Count)
                {
                    Debug.LogWarning("Invalid support equipment slot index: " + slotIndex);
                    return;
                }

                SupportEquipmentBase equipmentToRemove = currentSupportEquipments[slotIndex];
                if (equipmentToRemove != null)
                {
                    equipmentToRemove.OnUnequipped();
                    currentSupportEquipments[slotIndex] = null;

                    PlayerCanvas.SupportEquipmentsUIArea.Remove(slotIndex);
                }
            }
        }

        #endregion
    }
}