character-system/Runtime/DropItemsOnDeath.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Sirenix.OdinInspector;
using KairoEngine.Core;
using KairoEngine.Inventory;

namespace KairoEngine.CharacterSystem
{
    public enum ItemDropRule
    {
        DoNothing,
        DropItem,
        RewardPlayer
    }

    public class DropItemsOnDeath : MonoBehaviour
    {
        public ItemContainer itemContainer;
        public DamageController damageController;

        [FoldoutGroup("Rules")] public ItemDropRule firearmsRule = ItemDropRule.DoNothing;
        [FoldoutGroup("Rules")] public ItemDropRule handWeaponsRule = ItemDropRule.DoNothing; 
        [FoldoutGroup("Rules")] public ItemDropRule moneyRule = ItemDropRule.RewardPlayer;
        [FoldoutGroup("Rules")] public ItemDropRule ammoRule = ItemDropRule.DropItem;
        [FoldoutGroup("Rules")] public ItemDropRule usableItemsRule = ItemDropRule.DropItem;
        [FoldoutGroup("Rules")] public ItemDropRule miscItemsRule = ItemDropRule.DropItem;
        [FoldoutGroup("Rules"), Range(0, 100)] public int dropItemProbability = 100;
        [FoldoutGroup("Rules"), Range(0, 100)] public int rewardPlayerProbability = 100;

        private CharacterController playerCharacter;

        void OnEnable()
        {
            DamageEvents.OnDeath += DropItems;
        }

        void OnDisable()
        {
            DamageEvents.OnDeath -= DropItems;
        }

        private void DropItems(DamageController damageController, CharacterController killedBy)
        {
            if(this.damageController == damageController)
            {
                //if(killedBy == GameController.instance.heroCharacter) playerCharacter = killedBy;
                DropItem();
            }
        }

        private void DropItem()
        {
            if(itemContainer.ItemList.Count > 0)
            {
                ItemRef itemRef = itemContainer.ItemList[0];
                ItemDropRule rule;
                int diceRoll = Random.Range(0, 101);
                switch (itemRef.item.category)
                {
                    case ItemType.firearm:
                        rule = firearmsRule;
                        break;
                    case ItemType.handWeapon:
                        rule = handWeaponsRule;
                        break;
                    case ItemType.ammo:
                        rule = ammoRule;
                        break;
                    case ItemType.instantEffect:
                        rule = usableItemsRule;
                        break;
                    default:
                        if(itemRef.item.title == "Old Dollars") rule = moneyRule;
                        else rule = miscItemsRule;
                        break;
                }
                
                switch (rule)
                {
                    case ItemDropRule.DoNothing:
                        //Debug.Log($"{rule.ToString()} for {itemRef.item.title} ({itemRef.item.category.ToString()})");
                        itemContainer.ItemList.Remove(itemRef);
                        break;
                    case ItemDropRule.DropItem:
                        //Debug.Log($"{rule.ToString()} for {itemRef.item.title} (probability: {diceRoll}/{dropItemProbability}, {itemRef.item.category.ToString()})");
                        if(diceRoll > dropItemProbability) 
                        {
                            itemContainer.ItemList.Remove(itemRef);
                            break;
                        }
                        ICommand dropItemCommand = new DropItemCommand(itemContainer, itemRef);
                        CommandInvoker.AddCommand(dropItemCommand);
                        break;
                    case ItemDropRule.RewardPlayer:
                        if(playerCharacter == null) break;
                        //Debug.Log($"{rule.ToString()} for {itemRef.item.title} (probability: {diceRoll}/{rewardPlayerProbability}, {itemRef.item.category.ToString()})");
                        if(diceRoll > rewardPlayerProbability) 
                        {
                            itemContainer.ItemList.Remove(itemRef);
                            break;
                        }
                        playerCharacter.itemContainer.AddItem(itemRef);
                        itemContainer.ItemList.Remove(itemRef);
                        break;
                    default:
                        break;
                }
                
                StartCoroutine(Timer.Start(0.1f, false, () =>
                {
                    DropItem();
                }));
            }
            
        }
    }
}