using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Inventory : ResourcePool
{
    public Character owner;
    public Equipment equipment;

    [Space(10)]
    public List<ItemData> items;
    public EventConnect ec = new EventConnect();
    [Space(10)]
    public Transform hand;
    public DropItem dropItem;
    public TileCameraEvent camShake;

    private void Start()
    {
        target.SetParent(hand);
        target.localPosition = Vector3.zero;
        target.localEulerAngles = Vector3.zero;
        target.SetParent(transform);
    }

    /// <summary>
    /// 필드에 떯어져있는 드랍아이템을 획득하여 이를 처리합니다.
    /// </summary>
    /// <param name="drop">드랍아이템</param>
    public void GainItem(DropItem drop)
    {
        if (this.drop != null)
            return;

        //상점에서 판매 하는 아이템일 경우 보유 코인을 확인하고 처리
        if (drop.PRODUCT && !ItemUse("Coin", drop.item.price))
            return;

        target.SetParent(hand);
        target.localPosition = Vector3.zero;
        target.localEulerAngles = Vector3.zero;
        target.SetParent(transform);
        target.localEulerAngles = new Vector3(65, 0, 0);

        this.drop = drop;
        Invoke("GainEnd_Force", 1f);
        switch (drop.item.type)
        {
            case "Pickup":
            case "Use":
                {
                    GainItemApply();
                }
                break;
            default:
                {
                    switch (drop.item.type)
                    {
                        case "Armor":
                        case "Weapon":
                        case "Accessory":
                            if (!equipment.InstallCheck_Item(drop.item))
                            {
                                this.drop = null;
                                return;
                            }
                            break;
                        case "Active":
                            if (owner.skill.HoldingItemCheck(drop.item.idx))
                            {
                                this.drop = null;
                                return;
                            }
                            break;
                        case "Passive":
                            if (owner.skill.HoldingItemCheck(drop.item.idx))
                            {
                                this.drop = null;
                                return;
                            }
                            if(drop.item.skills.Find(a => a.work.Equals("AHRestore")) != null)
                            {
                                if (!equipment.InstallCheck_Part(EquipType.Armor))
                                {
                                    this.drop = null;
                                    return;
                                }
                            }
                            break;
                    }

                    drop.sprite.gameObject.SetActive(false);

                    dropItem.item = drop.item;
                    dropItem.OnInitialized();

                    owner.OnGain(drop.gameObject, () =>
                    {
                        ec.Invoke((int)Character.State.EquipItem, drop.item);

                        GameObject eff = EffectPrefabGet(drop.item.type, EffectTargetGet(drop.item.type));
                        if (eff != null)
                        {
                            eff.gameObject.SetActive(true);

                            bool chk = !drop.item.type.Equals("Armor");
                            if (!chk)
                                camShake.Shake();

                            dropItem.gameObject.SetActive(chk);
                        }

                        GainItemApply();
                    });
                }
                break;
        }
    }

    [Space(10)]
    public GameObject particleArmor;
    public GameObject particlePassive;
    public GameObject particle;
    /// <summary>
    /// 아이템 종류에 따른 이팩트 처리
    /// </summary>
    /// <param name="type">아이템 종류</param>
    /// <param name="target">이팩트가 붙을 위치</param>
    /// <returns></returns>
    GameObject EffectPrefabGet(string type, Transform target)
    {
        switch (type)
        {
            case "Armor":
                return ObjectCreateLocalPos(particleArmor, target, Vector3.one, Vector3.zero);
            case "Passive":
                return ObjectCreateLocalPos(particlePassive, target, Vector3.one, Vector3.zero);
            default:
                return ObjectCreateLocalPos(particle, target, Vector3.one, Vector3.zero);
        }
    }

    [Space(10)]
    public Transform targetArmor;
    public Transform targetPassive;
    public Transform target;
    /// <summary>
    /// 아이템 종류에 따른 타겟을 넘깁니다.
    /// </summary>
    /// <param name="type">아이템 종류</param>
    /// <returns></returns>
    Transform EffectTargetGet(string type)
    {
        switch (type)
        {
            case "Armor":
                return targetArmor;
            case "Passive":
                return targetPassive;
            default:
                return target;
        }
    }

    [Space(10)]
    public DropItem drop = null;
    /// <summary>
    /// 획득한 아이템을 적용합니다.
    /// </summary>
    public void GainItemApply()
    {
        if (drop == null)
            return;

        switch (drop.item.type)
        {
            case "Pickup":
                Type_Pickup(drop.item, drop);
                break;
            case "Use":
                Type_Use(drop.item, drop);
                break;
            case "Armor":
            case "Weapon":
            case "Accessory":
                bool chk = !equipment.Install(drop.item);
                drop.gameObject.SetActive(chk);

                GainEnd();
                break;
            case "Active":
                drop.gameObject.SetActive(false);

                ec.Invoke((int)Character.State.ActiveItem, drop.item);

                GainEnd();
                break;
            case "Passive":
                owner.skill.Install(drop.item);
                drop.gameObject.SetActive(false);

                GainEnd();
                break;
        }
    }
    /// <summary>
    /// 획득 이벤트를 종료합니다.
    /// </summary>
    void GainEnd()
    {
        owner.map.blkCurrent.DropItemChanged(drop);
        GetSound(drop.item.type);
        drop = null;

        //target.SetParent(transform);
        CancelInvoke();
    }
    /// <summary>
    /// 획득 이벤트를 강제 종료합니다.
    /// </summary>
    void GainEnd_Force()
    {
        drop = null;
    }

    /// <summary>
    /// 아이템 종류별 획득 사운드를 넘깁니다.
    /// </summary>
    /// <param name="type"></param>
    public void GetSound(string type)
    {
        SoundPlayer sp = SoundManager.Instance.PrefabGet($"Sound/SFX item_get_{type.ToLower()}");
        if (sp != null)
            SoundManager.Instance.EffectPlay(sp.gameObject);
    }

    /// <summary>
    ///  Pickup 타입의 아이템을 처리합니다.
    /// </summary>
    /// <param name="item"></param>
    /// <param name="drop"></param>
    void Type_Pickup(ItemData item, DropItem drop)
    {
        GainEnd();
        drop.OnAnimaionStart(() =>
        {
            drop.gameObject.SetActive(false);
        });

        ItemData itemHold = items.Find(a => a.idx == item.idx);

        if (itemHold != null)
        {
            if (item.OVERLAP)//중첩되는 아이템인치 확인
            {
                itemHold.Add(item.hold);
                ec.Invoke((int)Character.State.Inventory, itemHold);

                return;
            }
        }

        itemHold = item;
        ec.Invoke((int)Character.State.Inventory, itemHold);
        items.Add(itemHold);
    }
    //bool Type_Check(ItemData item)
    //{
    //    switch (item.work)
    //    {
    //        case "HP_Restore":
    //            return owner.RestoreCheck((int)item.value);
    //        case "AH_Added":
    //            return owner.ArmorHeartCheck((int)item.value);
    //        case "Mana_Added":
    //            return owner.ManaCheck();
    //        default:
    //            return true;
    //    }
    //}
    /// <summary>
    /// USE 타입의 아이템을 처리합니다.
    /// </summary>
    /// <param name="item"></param>
    /// <param name="drop"></param>
    void Type_Use(ItemData item, DropItem drop)
    {
        bool CHK = false;
        switch(item.work)
        {
            case "HP_Restore":
                {
                    CHK = owner.Restore((int)item.value);
                }
                break;
            case "AH_Added":
                {
                    if (equipment.InstallCheck_Part(EquipType.Armor))
                        CHK = owner.OnAdded_ArmorHeart((int)item.value);
                }
                break;
            case "Mana_Added":
                {
                    CHK = owner.OnAdded_Mana((int)item.value);
                }
                break;
        }

        if (CHK)
        {
            GainEnd();
            drop.OnAnimaionStart(() =>
            {
                drop.gameObject.SetActive(false);
            });
        }
        else
            this.drop = null;
    }

    /// <summary>
    /// Pickup 아이템을 사용합니다.
    /// </summary>
    /// <param name="idx">Pickup 아이템 idx</param>
    /// <param name="value">사용 개수</param>
    /// <returns></returns>
    public bool ItemUse(string idx, int value)
    {
        ItemData item = items.Find(a => a.idx == idx);
        
        if(item != null && value <= item.hold)
        {
            item.Add(-value);
            ec.Invoke((int)Character.State.Inventory, item);

            return true;
        }

        return false;
    }
}