using UnityEngine;
using AC;

namespace AC.CombatExample
{
    public class CustomInventory : MonoBehaviour
    {
        #region Variables

        [SerializeField] public int currentlySelectedItemID = 0;
        [SerializeField] private float inputDelay = 0.2f; // Delay before accepting input
        [SerializeField] private int equipIconID = 3;
        [SerializeField] private int unequipIconID = 6;
        [SerializeField] private int combineIconID = 5;
        [SerializeField] private int weaponCategoryID = 1;

        private Menu inventoryMenu;
        private Menu interactionMenu;
        private InventoryItemGO[] spawnedItems;
        private bool isOn;
        private float inputCooldown;

        #endregion

        #region UnityStandards

        private void OnEnable()
        {
            EventManager.OnMenuTurnOn += OnMenuTurnOn;
            EventManager.OnMenuTurnOff += OnMenuTurnOff;
            EventManager.OnInventoryInteract_Alt += OnInventoryInteract;
        }

        private void OnDisable()
        {
            EventManager.OnMenuTurnOn -= OnMenuTurnOn;
            EventManager.OnMenuTurnOff -= OnMenuTurnOff;
            EventManager.OnInventoryInteract_Alt -= OnInventoryInteract;
        }

        private void Start()
        {
            inventoryMenu = PlayerMenus.GetMenuWithName("Inventory");
            interactionMenu = PlayerMenus.GetMenuWithName("Interaction");
        }

        private void Update()
        {
            Menu interactionsMenu = PlayerMenus.GetMenuWithName("Interaction");
            inputCooldown -= Time.unscaledDeltaTime; // Reduce cooldown over time
            //bool inventoryOn = AC.PlayerMenus.GetMenuWithName("Inventory").IsOn();
            //bool interactionOn = AC.PlayerMenus.GetMenuWithName("Interaction").IsOn();

            if (interactionsMenu != null)
            {
                InvInstance foundInstance = GetInventoryInstanceByID(currentlySelectedItemID);
                if (foundInstance != null)
                {
                    // Select the correct inventory item for interactions
                    //inputCooldown <= 0f && 
                    // && inventoryMenu.IsOn()

                    if (Input.GetButtonDown("Submit") && interactionMenu.IsOff())
                    {
                        KickStarter.runtimeInventory.SelectItem(foundInstance);
                        interactionMenu.TurnOn();
                        interactionMenu.MatchInteractions(foundInstance, true);
                        Debug.Log("Interactions menu opened - setting item to: " + foundInstance.InvItem.label);
                    }
                }
                else
                {
                    Debug.Log("No InvInstance 'foundInstance' found");
                }
            }
        }

        private InvInstance GetInventoryInstanceByID(int id)
        {
            if (KickStarter.runtimeInventory == null)
            {
                Debug.LogError("Runtime Inventory not initialized.");
                return null;
            }

            // Search through player's inventory for an instance of the item
            foreach (InvInstance instance in KickStarter.runtimeInventory.PlayerInvCollection.InvInstances)
            {
                if (instance.InvItem.id == id)
                {
                    return instance; // Return the instance, not the InvItem
                }
            }

            return null; // Item not found
        }

        private void OnMenuTurnOn(Menu menu, bool isInstant)
        {
            if (menu == inventoryMenu)
            {
                //KickStarter.runtimeInventory.SetNull();
                isOn = true;
                KickStarter.cursorManager.inventoryHandling = InventoryHandling.ChangeCursorAndHotspotLabel;
                SpawnItems();

                inputCooldown = inputDelay; // Set delay when opening inventory
            }
        }

        private void OnMenuTurnOff(Menu menu, bool isInstant)
        {
            if (menu == inventoryMenu)
            {
                isOn = false;
                KickStarter.cursorManager.inventoryHandling = InventoryHandling.ChangeCursor;

                foreach (InventoryItemGO spawnedItem in spawnedItems)
                {
                    Destroy(spawnedItem.gameObject);
                }
            }
        }

        private void OnInventoryInteract(InvInstance invInstance, int iconID)
        {
            if (iconID == combineIconID)
            {
                // Combine the item	
                invInstance.Select();
            }
            else if (invInstance.InvItem.binID == weaponCategoryID)
            {
                // Is a weapon
                if (iconID == equipIconID)
                {
                    // Equip the item
                    inventoryMenu.TurnOff();
                }
                else if (iconID == unequipIconID)
                {
                    // Unequip the item
                    inventoryMenu.TurnOff();
                }
            }
        }

        #endregion

        #region PrivateFunctions

        private void SpawnItems()
        {
            spawnedItems = new InventoryItemGO[KickStarter.runtimeInventory.localItems.Count];

            for (int i = 0; i < spawnedItems.Length; i++)
            {
                if (KickStarter.runtimeInventory.localItems[i].linkedPrefab)
                {
                    GameObject spawnedItem = Instantiate(KickStarter.runtimeInventory.localItems[i].linkedPrefab, Vector3.zero, Quaternion.identity);
                    spawnedItems[i] = spawnedItem.GetComponent<InventoryItemGO>();
                }
                else
                {
                    GameObject emptyItem = new GameObject();
                    emptyItem.transform.position = Vector3.zero;
                    spawnedItems[i] = emptyItem.AddComponent<InventoryItemGO>();
                }
            }
        }

        #endregion
    }
}