using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityStandardAssets.Characters.FirstPerson;
using UnityStandardAssets.Characters.ThirdPerson;

[System.Serializable]
public class Inventory : MonoBehaviour {

    public static Inventory inventory;

    ItemDatabase database;
    GameObject slotPanel;
    public GameObject inventorySlot;
    public GameObject inventoryItem;
    public GameObject inventoryCanvas;
    public KeyCode inventoryKey = KeyCode.I;

    private PauseManager pauseManager;
    //private RigidbodyFirstPersonController fpsController;
    //private ThirdPersonUserControl fpsController;
    //private float defaultSensetivityX = 2f;
    //private float defaultSensetivityY = 2f;



    public bool isShown = false;

    int slotAmount;
    public List<Item> items = new List<Item>();
    public List<GameObject> slots = new List<GameObject>();



    void Start()
    {
        //fpsController = GameObject.FindGameObjectWithTag("Player").GetComponent<RigidbodyFirstPersonController>();
        //defaultSensetivityX = fpsController.mouseLook.XSensitivity;
        //defaultSensetivityY = fpsController.mouseLook.YSensitivity;

        inventory = this;

        database = GetComponent<ItemDatabase>();

        slotAmount = 21;
        slotPanel = GameObject.Find("Slot Panel");
        for (int i = 0; i <slotAmount; i++)
        {
            items.Add(new Item());
            slots.Add(Instantiate(inventorySlot));
            slots[i].GetComponent<Slot>().id = i;
            slots[i].transform.SetParent(slotPanel.transform);
        }

        AddItem(0);
        AddItem(0);
        AddItem(1);
        AddItem(1);

        isShown = false;

    }

    public void AddItem(int id)
    {
        Item itemToAdd = database.FetchItemByID(id);
        if (itemToAdd.Stackable && CheckIfItemIsInInventory (itemToAdd))
        {
            for (int i = 0; i < items.Count; i++)
            {
                if (items[i].ID == id)
                {
                    ItemData data = slots[i].transform.GetChild(0).GetComponent<ItemData>();
                    data.amount++;
                    data.transform.GetChild(0).GetComponent<Text>().text = data.amount.ToString();
                    break;
                }
            }
        }
        else
        {
            for (int i = 0; i < items.Count; i++)
            {
                if (items[i].ID == -1)
                {
                    items[i] = itemToAdd;
                    GameObject itemObj = Instantiate(inventoryItem);
                    itemObj.GetComponent<ItemData>().item = itemToAdd;
                    itemObj.GetComponent<ItemData>().slot = i;
                    itemObj.transform.SetParent(slots[i].transform);
                    itemObj.transform.position = Vector2.zero;
                    itemObj.GetComponent<Image>().sprite = itemToAdd.Sprite;
                    itemObj.name = itemToAdd.Title;
                    ItemData data = slots[i].transform.GetChild(0).GetComponent<ItemData>();
                    data.amount = 1;
                    break;
                }
            }
        }
    }

    bool CheckIfItemIsInInventory(Item item)
    {
        for (int i = 0; i < items.Count; i++)
            if (items[i].ID == item.ID)
                return true;
        return false;
    }

    void Update()
    {

        if (Input.GetKeyDown(inventoryKey))
        {
            isShown = !isShown;

            if (isShown == true)
            {
                //fpsController.mouseLook.XSensitivity = 0;
                //fpsController.mouseLook.YSensitivity = 0;
            }
            else if (isShown == false)
            {
                //fpsController.mouseLook.XSensitivity = defaultSensetivityX;
                //fpsController.mouseLook.YSensitivity = defaultSensetivityY;
            }
        }

       if (isShown == true)
        {
            inventoryCanvas.SetActive(true);
        }
        else if (isShown == false)
        {
            inventoryCanvas.SetActive(false);
        }
    }

}