inventory/Runtime/UI/BarterControllerUi.cs

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

namespace KairoEngine.Inventory
{
    public class BarterControllerUi : MonoBehaviour
    {
        public static BarterControllerUi instance;
        public GameObject buyItemSlotPrefab;

        public ItemContainerUi buyUi;
        public ItemContainerUi sellUi;
        public float panelDistance = 4.5f;

        public SFXClip sfxAddItem;
        public SFXClip sfxRemoveItem;
        public SFXClip sfxConfirm;
        public SFXClip sfxCancel;
        public SFXClip sfxNegative;
        public SFXClip sfxOpenWindow;

        private bool initialized = false;
        
        private void Awake()
        {
            if(instance == null) instance = this;
            else Destroy(this);
        }
        private void Update ()
        {
            if(buyUi.itemContainerPanel.activeSelf && buyUi.targetItemContainer != null)
            {
                if(!initialized) Initialize();
                UpdatePanelPosition(buyUi.targetItemContainer.transform, buyUi.itemContainerPanel.transform);
                UpdatePurchaseValue();
                
            }
            if(sellUi.itemContainerPanel.activeSelf && sellUi.targetItemContainer != null)
            {
                if(!initialized) Initialize();
                UpdatePanelPosition(sellUi.targetItemContainer.transform, sellUi.itemContainerPanel.transform);
                UpdateSaleValue();
            }
        }

        private void Initialize()
        {
            initialized = true;
            SoundController.EmmitSound(sfxOpenWindow, this.transform.position);
        }

        private void UpdatePanelPosition(Transform target, Transform targetPanel)
        {
            RectTransform panelTransform = targetPanel.GetComponent<RectTransform>();
            Vector3 pos = new Vector3(target.position.x, target.position.y + panelDistance, target.position.z);
            Vector3 screenPos = Camera.main.WorldToScreenPoint(pos);
            if(Vector3.Distance(panelTransform.position, screenPos) > 0.1f)
            {
                screenPos.z = 100;
                panelTransform.position = screenPos;
            }
            
        }

        private void UpdateSaleValue()
        {
            int total = 0;
            foreach (var item in sellUi.targetItemContainer.inventory)
            {
                total += item.item.value * item.quantity;
            }
            string title = "Sell Items ($" + total + ")";
            sellUi.SetWindowTitle(title);
        }

        private void UpdatePurchaseValue()
        {
            int total = 0;
            foreach (var itemSlot in buyUi.itemSlots)
            {
                if(itemSlot.itemRef != null)
                {
                    total += itemSlot.itemRef.item.value * itemSlot.quantityToBuy;
                }
                
            }
            string title = "Buy Items ($" + total + ")";
            buyUi.SetWindowTitle(title);
        }

        public void ConcludeSale()
        {
            int total = 0;
            foreach (var item in sellUi.targetItemContainer.inventory)
            {
                total += item.item.value * item.quantity;
            }
            sellUi.targetItemContainer.inventory.Clear();
            ItemBase itemBase = ItemLibrary.GetItemByName("Old Dollars");
            ItemRef itemRef = new ItemRef(itemBase, total, 1000);
            ItemContainer playerInventory = null; //GameController.instance.heroCharacter.GetComponent<ItemContainer>();
            if(playerInventory == null) 
            {
                Debug.LogError("playerInventory is missing!");
                return;
            }
            playerInventory.AddItem(itemRef);
            ICommand closeItemContainerCommand = new CloseItemContainerCommand(sellUi.targetItemContainer.title);
            CommandInvoker.AddCommand(closeItemContainerCommand);
            EmmitEvent(sellUi.targetItemContainer, total);
            initialized = false;
            SoundController.EmmitSound(sfxConfirm, this.transform.position);
        }

        public void ConcludePurchase()
        {
            ItemContainer playerInventory = EventManager.request.GetItemContainer("PlayerItemContainer").value;
            if(playerInventory == null) 
            {
                Debug.LogError("playerInventory is missing!");
                return;
            }
            List<ItemRef> tradedItems = new List<ItemRef>();
            int total = 0;
            for (int i = 0; i < buyUi.itemSlots.Count; i++)
            {
                ItemSlotUi itemSlot = buyUi.itemSlots[i];
                if(itemSlot.itemRef != null)
                {
                    if(itemSlot.quantityToBuy > 0)
                    {
                        total += itemSlot.itemRef.item.value * itemSlot.quantityToBuy;
                        ItemRef playerItemRef = new ItemRef(itemSlot.itemRef.item, itemSlot.quantityToBuy, 1000);
                        ItemRef currentItemRef = new ItemRef(itemSlot.itemRef.item, itemSlot.quantityToBuy, 1000);
                        if(currentItemRef.item.category == ItemType.firearm)
                        {
                            ItemBaseFirearm firearmItem = (ItemBaseFirearm)playerItemRef.item;
                            ItemFirearmRef firearmRef = new ItemFirearmRef(firearmItem, playerItemRef.quantity, firearmItem.ammoType, firearmItem.ammoCapacity);
                            playerItemRef = firearmRef;
                        }
                        tradedItems.Add(currentItemRef);
                        playerInventory.AddItem(playerItemRef);
                        GenericEvents.Trigger("Player buy item", $"{playerItemRef.item.title}_{playerItemRef.item.value}", playerItemRef.quantity);
                    }
                }
            }
            ItemBase itemBase = ItemLibrary.GetItemByName("Old Dollars");
            ItemRef itemRef = new ItemRef(itemBase, total, 1000);
            playerInventory.RemoveItem(itemRef);
            foreach (var tradedItem in tradedItems)
            {
                buyUi.targetItemContainer.RemoveItem(tradedItem);
            }
            ICommand closeItemContainerCommand = new CloseItemContainerCommand(buyUi.containerTitle);
            CommandInvoker.AddCommand(closeItemContainerCommand);
            EmmitEvent(buyUi.targetItemContainer, total);
            initialized = false;
            SoundController.EmmitSound(sfxConfirm, this.transform.position);
        }

        public void CancelSale()
        {
            ItemContainer playerInventory = null; //GameController.instance.heroCharacter.GetComponent<ItemContainer>();
            if(playerInventory == null) 
            {
                Debug.LogError("playerInventory is missing!");
                return;
            }
            foreach (var item in sellUi.targetItemContainer.inventory)
            {
                playerInventory.AddItem(item);
            }
            sellUi.targetItemContainer.inventory.Clear();
            ICommand closeItemContainerCommand = new CloseItemContainerCommand(sellUi.targetItemContainer.title);
            CommandInvoker.AddCommand(closeItemContainerCommand);
            EmmitEvent(sellUi.targetItemContainer, 0);
            initialized = false;
            SoundController.EmmitSound(sfxCancel, this.transform.position);
        }

        public void CancelPurchase()
        {
            ICommand closeItemContainerCommand = new CloseItemContainerCommand(buyUi.containerTitle);
            CommandInvoker.AddCommand(closeItemContainerCommand);
            EmmitEvent(buyUi.targetItemContainer, 0);
            initialized = false;
            SoundController.EmmitSound(sfxCancel, this.transform.position);
        }

        private void EmmitEvent(ItemContainer itemContainer, int value)
        {
            CharacterController character = itemContainer.GetComponent<CharacterController>();
            if(character == null) return;
            GenericEvents.Trigger("TradeFinished");
        }
    }
}