using Microsoft.AspNetCore.Components;

namespace BlazorApp1.Components
{
    public partial class InventoryItem : ItemDisplay
    {
        [Parameter]
        public int Index { get; set; }

        [Parameter]
        public Item Item { get; set; }

        [Parameter]
        public bool NoDrop { get; set; }

        [Parameter]
        public int nbElem { get; set; }

        [CascadingParameter]
        public Inventory Parent { get; set; }


        public void setItem(Item item)
        {
            this.Item = item;
        }

        public void setNbElement(int nbElement)
        {
            this.nbElem = nbElement;
        }

        public void changeState()
        {
            StateHasChanged();
        }

        public Item getItem()
        {
            return Item;
        }

        public int getNbElement()
        {
            return nbElem;
        }

        public String getTypeID()
        {
            return "InventoryItem";
        }

        internal void OnDragEnter()
        {
            if (NoDrop)
            {
                return;
            }
        }

        internal void OnDragLeave()
        {
            if (NoDrop)
            {
                return;
            }

        }

        internal void OnDrop()
        {
            if (NoDrop)
            {
                return;
            }

            if (this.Item is not null)
            {
                if (this.Item.Equals(Parent.CurrentDragItem))
                {
                    if (this.nbElem < this.Item.StackSize && Parent.CurrentEllement.getTypeID() == "ListItem")
                    {
                        this.nbElem++;
                    }
                    else if (this.nbElem + Parent.CurrentEllement.getNbElement() > this.Item.StackSize && Parent.CurrentEllement.getTypeID() == "InventoryItem")
                    {
                        int tmp = this.nbElem + Parent.CurrentEllement.getNbElement();
                        this.nbElem = this.Item.StackSize;
                        Parent.CurrentEllement.setNbElement(tmp - this.Item.StackSize);
                    }
                    else if (Parent.CurrentEllement.getTypeID() == "InventoryItem")
                    {
                        this.nbElem += Parent.CurrentEllement.getNbElement();
                        Parent.CurrentEllement.setNbElement(0);
                        Parent.CurrentEllement.setItem(null);
                    }
                    else
                    {
                        int indice = -1;
                        for (int i = 0; i < 40; i++)
                        {
                            if (this.Item.Equals(Parent.InventoryItems[i]) && this.nbElem < this.Item.StackSize) {
                                Parent.InventoryNbElems[i]++;
                                indice = -1;
                                break;
                            }
                            else if (Parent.InventoryItems[i] is null && indice == -1)
                            {
                                indice = i;
                            }
                        }
                        if (indice != -1)
                        {
                            Parent.InventoryItems[indice] = this.Item;
                            Parent.InventoryNbElems[indice] = 1;
                        }
                    }
                }
                else
                {
                    if (Parent.CurrentEllement.getTypeID() == "InventoryItem")
                    {
                        int tmp = this.nbElem;
                        this.nbElem = Parent.CurrentEllement.getNbElement();
                        Parent.CurrentEllement.setNbElement(tmp);
                        Item tmpI = this.Item;
                        this.Item = Parent.CurrentEllement.getItem();
                        Parent.CurrentEllement.setItem(tmpI);
                    }
                }
            }
            else
            {
                Item tmp = this.Item;
                int tmpNb = this.nbElem;

                this.Item = Parent.CurrentDragItem;
                this.nbElem = Parent.CurrentEllement.getNbElement();

                if (Parent.CurrentEllement.getTypeID() == "InventoryItem")
                {
                    InventoryItem invItem = (InventoryItem)Parent.CurrentEllement;

                    invItem.Item = tmp;
                    invItem.nbElem = tmpNb;

                    Parent.CurrentEllement = invItem;
                }
                else if (Parent.CurrentEllement.getTypeID() == "ListItem")
                {

                }
            }
            Parent.CurrentEllement.changeState();
            StateHasChanged();
        }

        private void OnDragStart()
        {
            Parent.CurrentDragItem = this.Item;
            Parent.CurrentEllement = this;
        }

        public int getIndex()
        {
            return Index;
        }
    }

}