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 dragImage;
        public GameObject itemDisplay;

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

        Dictionary<string, int> statBoost;

        public int currentBag = -1;

        GameObject startDrag;
        TooltipHandler tooltip;
        

        // Start is called before the first frame update
        void Start()
        {
            statBoost = new Dictionary<string, int>();
            statBoost.Add("HP", 0);
            statBoost.Add("MP", 0);
            statBoost.Add("HPR", 0);
            statBoost.Add("MPR", 0);
            statBoost.Add("STR", 0);
            statBoost.Add("DEX", 0);
            statBoost.Add("INT", 0);
            statBoost.Add("LCK", 0);
            tooltip = GameObject.Find("TooltipHandler").GetComponent<TooltipHandler>();
            itemDisplay.transform.localScale = new Vector3(0,0,0);
            changeCurrentBag(0);
        }

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

        public void addItem(Item item)
        {
            if (item != null)
            {
                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(i) == null)
                        {
                            slots[j].GetComponent<InventorySlot>().setItem(item, i);
                            itemAdded = true;
                            slots[j].GetComponent<RawImage>().color = item.rarityColor;
                            slots[j].GetComponent<RawImage>().texture = item.image;
                            break;
                        }
                    }
                    if (itemAdded)
                    {
                        GameObject.Find("UIHandler").GetComponent<UIHandler>().showMessage("SUCCESS;You got an item!");
                        break;
                    }
                }
                if (!itemAdded)
                {
                    GameObject.Find("UIHandler").GetComponent<UIHandler>().showMessage("ERROR;No inventory space left.");
                }
            }
        }

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

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

        private void checkEquipColors()
        {
            GameObject slot = head;
            Item item;
            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;
                }
                item = slot.GetComponent<InventorySlot>().getEquip();
                if (item != null)
                {
                    slot.GetComponent<RawImage>().color = item.rarityColor;
                    slot.GetComponent<RawImage>().texture = item.image;
                }
                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.LEFTHAND:
                    return leftHand.GetComponent<InventorySlot>().getEquip();
                case ItemPlace.RIGHTHAND:
                    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;
            }
        }

        public void calculateStatBoost(Dictionary<string, int> attributes, bool isAddition)
        {
            foreach (string key in attributes.Keys)
            {
                if (isAddition)
                {
                    statBoost[key] = statBoost[key] + attributes[key];
                }
                else
                {
                    statBoost[key] = statBoost[key] - attributes[key];
                }
            }
        }

        public Dictionary<string, int> getEquipmentBonus()
        {
            if (statBoost == null)
            {
                statBoost = new Dictionary<string, int>();
                statBoost.Add("HP", 0);
                statBoost.Add("MP", 0);
                statBoost.Add("HPR", 0);
                statBoost.Add("MPR", 0);
                statBoost.Add("STR", 0);
                statBoost.Add("DEX", 0);
                statBoost.Add("INT", 0);
                statBoost.Add("LCK", 0);
            }
            return statBoost;
        }
    }
}