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

// ReSharper disable once CheckNamespace
namespace BlueWaterProject
{
    [CreateAssetMenu(fileName = "DropItemTable", menuName = "ScriptableObjects/Item/DropItemTable")]
    public class DropItemTable : ScriptableObject
    {
        public List<ItemInstance> itemInstanceList = new();

        private ItemInstance PickItem()
        {
            var count = itemInstanceList.Count;

            if (count == 0) return null;

            var sumRatio = itemInstanceList.Sum(element => element.Ratio);
            var randomRatio = Random.Range(0, sumRatio);

            for (var i = 0; i < count; i++)
            {
                randomRatio -= itemInstanceList[i].Ratio;

                if (randomRatio < 0)
                {
                    return itemInstanceList[i];
                }
            }

            return null;
        }

        public void ItemDrop(Vector3 dropPosition)
        {
            var dropItem = PickItem();
            if (dropItem == null) return;

            var dropCount = Random.Range((int)dropItem.Count.x, (int)dropItem.Count.y + 1);
            var instantiateItem = dropItem.Item.InstantiateItem(dropItem.prefab, dropPosition);
            instantiateItem.GetComponentInChildren<DropItemController>().Init(dropItem, dropCount);
        }
    }
}