using System;
using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEngine;

public abstract class WarehousePanelController : DraggablePanelController
{
    public override void EndDrag(ItemSlot itemSlot)
    {
        if (!DraggedSlotController.Instance.IsDragged()) // if there was nothing dragged - ignore event
            return;

        DraggedSlotController.Instance.RemoveDraggedSlot();

        // 1. Remove from slot - for case where EndDrag and Drop work on differen UiManager's 
        // Important: clear slot not only reset itemn!!!
        if (!itemSlot.Item)
            ((ItemSlot)ChildBoxList.Where(slot => slot.Number == itemSlot.Number).First()).ResetSlot();
        else
            ((ItemSlot)ChildBoxList.Where(slot => slot.Number == itemSlot.Number).First()).SetItem(itemSlot.Item);
        
        // 2. Rebuild/apply UiManager content (list of items) base on slots values after its updating

        // 2.1 Make copy because Add -> base.Add() -> base.Add() -> UpdateList() rebuild content ad pass "new" list (in this case with only one - firtst passed - item) to ChestContentUiMangaer.Element 
        var ChildBoxListCopy = new List<IndexValuePair<int, EquippableItem>>(ChildBoxList.Where(slot => slot.Item != null).Select(slot => new IndexValuePair<int, EquippableItem>(slot.Number, slot.Item)).ToList());

        UiManager.RemoveAll();

        foreach(IndexValuePair<int, EquippableItem> slot in ChildBoxListCopy)
        {
            if (slot.Value != null)
            {
                Debug.Log($"Slot nr: {slot.Key} with item: {slot.Value}");
                UiManager.Add(new IndexValuePair<int, EquippableItem>(slot.Key, slot.Value));
            }
            else
            {
                UiManager.RemoveByPosition(slot.Key);
            }
        }
    }

    public override void BuildPanelContent(List<IndexValuePair<int, EquippableItem>> elements)
    {
        base.BuildPanelContent(elements);

        ClearSlots();
    }

    public override void ClearSlots()
    {
        foreach (ItemSlot ChestSlot in ChildBoxList)
        {
            ChestSlot.ResetSlot();
        }
    }

    public abstract override void BuildPanelSlots();
    public abstract override GameObject BuildSlot(int key, GameObject _parent);
}