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

namespace Assets.Scripts
{
    public class Inventory : MonoBehaviour
    {
        public GameObject head;
        public GameObject chest;
        public GameObject shoulders;
        public GameObject feet;
        public GameObject ring;
        public GameObject amulet;
        public GameObject leftHand;
        public GameObject rightHand;

        public GameObject[] bags;
        public GameObject[] slots;

        public int currentBag = -1;

        GameObject startDrag;

        // Start is called before the first frame update
        void Start()
        {
            changeCurrentBag(0);
        }

        // Update is called once per frame
        void Update()
        {
            checkInventoryColors();
            checkEquipColors();
        }

        public void addItem(Item item)
        {
            if (item != null)
            {
                GameObject.Find("UIHandler").GetComponent<UIHandler>().showMessage("SUCCESS;You got an item!");
                bool itemAdded = false;
                for (int i = 0; i < bags.Length; i++)
                {
                    for (int j = 0; j < slots.Length; j++)
                    {
                        if (slots[j].GetComponent<InventorySlot>().getItem() == null)
                        {
                            slots[j].GetComponent<InventorySlot>().setItem(item);
                            itemAdded = true;
                            slots[j].GetComponent<RawImage>().color = Color.red;
                            break;
                        }
                    }
                    if (itemAdded)
                    {
                        break;
                    }
                }
            }
        }

        public void changeCurrentBag(int index)
        {
            if (currentBag != -1)
            {
                bags[currentBag].GetComponent<RawImage>().color = Color.white;
            }
            currentBag = index;
            bags[currentBag].GetComponent<RawImage>().color = Color.cyan;
            checkInventoryColors();
            foreach(GameObject slot in slots)
            {
                slot.GetComponent<InventorySlot>().updateCurrentBag(currentBag);
            }
        }

        private void checkInventoryColors()
        {
            for (int i = 0; i < slots.Length; i++)
            {
                if (slots[i].GetComponent<InventorySlot>().getItem() != null)
                {
                    slots[i].GetComponent<RawImage>().color = Color.red;
                }
                else
                {
                    slots[i].GetComponent<RawImage>().color = Color.white;
                }
            }
        }

        private void checkEquipColors()
        {
            GameObject slot = head;
            for (int i = 0; i < 8; i++)
            {
                switch (i)
                {
                    case 0:
                        slot = head;
                        break;
                    case 1:
                        slot = rightHand;
                        break;
                    case 2:
                        slot = leftHand;
                        break;
                    case 3:
                        slot = amulet;
                        break;
                    case 4:
                        slot = feet;
                        break;
                    case 5:
                        slot = shoulders;
                        break;
                    case 6:
                        slot = chest;
                        break;
                    case 7:
                        slot = ring;
                        break;
                }
                if (slot.GetComponent<InventorySlot>().getEquip() != null)
                {
                    slot.GetComponent<RawImage>().color = Color.red;
                }
                else
                {
                    slot.GetComponent<RawImage>().color = Color.white;
                }
            }    
        }

        public void setDrag(GameObject slot)
        {
            startDrag = slot;
        }

        public GameObject getDrag()
        {
            return startDrag;
        }

        public Item getEquip(ItemPlace place)
        {
            switch (place)
            {
                case ItemPlace.SHIELD:
                    return leftHand.GetComponent<InventorySlot>().getEquip();
                case ItemPlace.WEAPON:
                    return rightHand.GetComponent<InventorySlot>().getEquip();
                case ItemPlace.HELMET:
                    return head.GetComponent<InventorySlot>().getEquip();
                case ItemPlace.BOOTS:
                    return feet.GetComponent<InventorySlot>().getEquip();
                case ItemPlace.SHOULDER:
                    return shoulders.GetComponent<InventorySlot>().getEquip();
                case ItemPlace.AMULET:
                    return amulet.GetComponent<InventorySlot>().getEquip();
                case ItemPlace.RING:
                    return ring.GetComponent<InventorySlot>().getEquip();
                case ItemPlace.ARMOR:
                    return chest.GetComponent<InventorySlot>().getEquip();
                default:
                    return null;
            }
        }
    }

}