using UnityEngine;
    using UnityEngine.Events;
    using System.Collections.Generic;

    public class ENTITY_QuestNPC : MonoBehaviour
    {
        [System.Serializable]
        public class QuestStage
        {
            public string stageName;

            [Header("Диалоги")]
            public DATA_Dialogue dialogueWaiting;
            public DATA_Dialogue dialogueReady;
            
            [Header("События после реплик (Waiting)")]
            public UnityEvent[] eventsWaiting;

            [Header("События после реплик (Ready)")]
            public UnityEvent[] eventsReady;

            [Header("Требования")]
            public string requiredItemID;
        }

        [Header("Настройки стадий")]
        public List<QuestStage> stages = new List<QuestStage>();
        public int currentStageIndex = 0;

        [Header("Завершение")]
        public DATA_Dialogue dialogueAllCompleted;
        public UnityEvent[] eventsAllCompleted;

        [Header("Ссылки (Заполнятся автоматически через Singleton)")]
        public MANAGER_Dialogues dialogueManager;
        public CORE_Inventory inventory; 

        void Start()
        {

            if (dialogueManager == null)
            dialogueManager = MANAGER_Dialogues.Instance;

            if (inventory == null)
            inventory = CORE_Inventory.Instance;

            if (inventory == null)

            if (dialogueManager == null);
        }

        public void Interact()
        {

            if (dialogueManager == null) 
            {
                return;
            }

            DATA_Dialogue dialogueToPlay = null;
            UnityEvent[] eventsToPlay = null;

            if (currentStageIndex < stages.Count)
            {
                QuestStage currentStage = stages[currentStageIndex];

                if (!string.IsNullOrEmpty(currentStage.requiredItemID) && inventory != null)
                {
                    bool hasItem = inventory.CheckItem(currentStage.requiredItemID);
                    
                    if (hasItem)
                    {
                        dialogueToPlay = currentStage.dialogueReady; 
                        eventsToPlay = currentStage.eventsReady;
                    }
                    else
                    {
                        dialogueToPlay = currentStage.dialogueWaiting;
                        eventsToPlay = currentStage.eventsWaiting; 
                    }
                }
                else
                {
                    dialogueToPlay = currentStage.dialogueWaiting;
                    eventsToPlay = currentStage.eventsWaiting;
                }
            }
            else
            {
                dialogueToPlay = dialogueAllCompleted;
                eventsToPlay = eventsAllCompleted;
            }

            if (dialogueToPlay != null)
            {
                dialogueManager.StartDialogue(dialogueToPlay, this.transform, eventsToPlay);
            }
        }

        public void AdvanceQuest()
        {
            currentStageIndex++;
        }

        public void RemoveRequiredItem()
        {
            if (currentStageIndex < stages.Count && inventory != null)
            {
                string itemID = stages[currentStageIndex].requiredItemID;
                if (!string.IsNullOrEmpty(itemID))
                {
                    inventory.RemoveItem(itemID);
                }
            }
            else if (inventory == null)
            {
            }
        }
    }