using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Assets.Scripts
{
    public class InventorySlot : MonoBehaviour
    {
        TooltipHandler tooltip;
        Item[] items = new Item[3];
        public bool[] itemRemoved = {false, false, false};
        int currentBag = 0;
        public ItemPlace place;
        Item equip;

        private void Start()
        {
            tooltip = GameObject.Find("TooltipHandler").GetComponent<TooltipHandler>();
        }

        public void updateCurrentBag(int currentBag)
        {
            this.currentBag = currentBag;
        }

        public void setItem(Item item)
        {
            items[currentBag] = item;
            itemRemoved[currentBag] = false;
        }

        public Item getItem()
        {
            return items[currentBag];
        }

        public void removeItem()
        {
            items[currentBag] = null;
            itemRemoved[currentBag] = true;
        }

        public void showTooltip()
        {
            if (place == ItemPlace.BAG)
            {
                if (items[currentBag] != null)
                {
                    string text = items[currentBag].getDisplayText();
                    Item equip = GameObject.Find("Inventory").GetComponent<Inventory>().getEquip(items[currentBag].getPlace());
                    if (equip != null)
                    {
                        text = "(Current)\r\n" + equip.getDisplayText() + "----------\r\n" + text;
                    }
                    tooltip.showTooltip(text);
                }
            }
            else
            {
                if (equip != null)
                {
                    tooltip.showTooltip(equip.getDisplayText());
                }
            }
        }

        public void hideTooltip()
        {
            tooltip.hideToolTip();
        }

        public void onClick()
        {
            removeItem();
            tooltip.hideToolTip();
        }

        public void OnMouseDrag()
        {
            GameObject.Find("Inventory").GetComponent<Inventory>().setDrag(gameObject);
        }

        public void OnMouseUp()
        {
            GameObject startDrag = GameObject.Find("Inventory").GetComponent<Inventory>().getDrag();
            Item item;
            bool isSwap = false;
            if (startDrag.GetComponent<InventorySlot>().place == ItemPlace.BAG)
            {
                item = startDrag.GetComponent<InventorySlot>().getItem();
            }
            else
            {
                item = startDrag.GetComponent<InventorySlot>().getEquip();
            }
            if (item != null)
            {
                if (place != item.getPlace() && place != ItemPlace.BAG)
                {
                    return;
                }
                if (place == ItemPlace.BAG)
                {
                    if (items[currentBag] != null)
                    {
                        startDrag.GetComponent<InventorySlot>().setItem(items[currentBag]);
                        isSwap = true;
                    }
                    setItem(item);
                }
                else
                {
                    if (equip != null)
                    {
                        if (startDrag.GetComponent<InventorySlot>().place == ItemPlace.BAG)
                        {
                            startDrag.GetComponent<InventorySlot>().setItem(equip);
                            isSwap = true;
                        }
                        else
                        {
                            return;
                        }
                    }
                    setEquip(item);
                }
                if (!isSwap)
                {
                    if (startDrag.GetComponent<InventorySlot>().place != ItemPlace.BAG)
                    {
                        startDrag.GetComponent<InventorySlot>().removeEquip();
                    }
                    else
                    {
                        startDrag.GetComponent<InventorySlot>().removeItem();
                    }
                }
            }
        }

        public Item getEquip()
        {
            return equip;
        }

        public void setEquip(Item item)
        {
            equip = item;
        }

        public void removeEquip()
        {
            equip = null;
        }
    }
}