// --- THIS SCRIPT CAN BE PLACED ANYWHERE IN YOUR ASSETS FOLDER ---

using UnityEngine;
using System.Collections.Generic;
using Sirenix.OdinInspector;
using PixelCrushers.DialogueSystem; // Required for [ConversationPopup] attribute
using PixelCrushers.QuestMachine;
using Invector.vCharacterController.vActions; // Required for the vTriggerGenericAction reference
using UnityEngine.Events;

namespace Beyond
{
    [AddComponentMenu("Beyond/Quests/Generic Quest Trigger")]
    [RequireComponent(typeof(vTriggerGenericAction))] // IMPORTANT: Ensures the Invector trigger is always on the same GameObject
    public class GenericQuestTrigger : MonoBehaviour
    {
        #region --- ODIN-POWERED INSPECTOR ---

        [Title("Invector Trigger Link")]
        [InfoBox("This component links into the vTriggerGenericAction below and adds quest/dialogue functionality to its events.")]
        [Required("A vTriggerGenericAction component is required on this GameObject.")]
        [OnInspectorInit("FindTriggerReference")] // Odin attribute to auto-fill the reference on first view
        public vTriggerGenericAction invectorTrigger;

        [Title("Quest and Dialogue Actions")]
        [ListDrawerSettings(Expanded = true, DraggableItems = true, NumberOfItemsPerPage = 10)]
        public List<TriggeredAction> actions = new List<TriggeredAction>();

        #endregion

        private GameObject _lastInteractor;
        
        // This is a helper method for the Odin attribute [OnInspectorInit]
        private void FindTriggerReference()
        {
            if (invectorTrigger == null)
            {
                invectorTrigger = GetComponent<vTriggerGenericAction>();
            }
        }

        #region --- CORE LOGIC (Lifecycle & Event Handlers) ---
        
        private void Start()
        {
            if (invectorTrigger == null)
            {
                Debug.LogError("GenericQuestTrigger requires a vTriggerGenericAction component, but none was found. Disabling component.", this);
                this.enabled = false;
                return;
            }
            
            // Subscribe our methods to the events on the Invector component
            invectorTrigger.OnPressActionInput.AddListener(() => HandleEvent(TriggerEventType.OnPressActionInput, _lastInteractor));
            invectorTrigger.OnStartAnimation.AddListener(() => HandleEvent(TriggerEventType.OnStartAnimation, _lastInteractor));
            invectorTrigger.OnEndAnimation.AddListener(() => HandleEvent(TriggerEventType.OnEndAnimation, _lastInteractor));
            
            invectorTrigger.OnPlayerEnter.AddListener(HandlePlayerEnter);
            invectorTrigger.OnPlayerExit.AddListener(HandlePlayerExit);
            invectorTrigger.OnValidate.AddListener((interactor) => HandleEvent(TriggerEventType.OnValidate, interactor));
            invectorTrigger.OnInvalidate.AddListener((interactor) => HandleEvent(TriggerEventType.OnInvalidate, interactor));

            if (DialogueManager.instance != null)
            {
                DialogueManager.instance.conversationEnded += OnConversationEnded;
            }
        }

        private void OnDisable()
        {
            if (DialogueManager.instance != null)
            {
                DialogueManager.instance.conversationEnded -= OnConversationEnded;
            }
            
            // It's good practice to unsubscribe from events when disabled/destroyed to prevent memory leaks
            if (invectorTrigger != null)
            {
                invectorTrigger.OnPressActionInput.RemoveListener(() => HandleEvent(TriggerEventType.OnPressActionInput, _lastInteractor));
                invectorTrigger.OnStartAnimation.RemoveListener(() => HandleEvent(TriggerEventType.OnStartAnimation, _lastInteractor));
                invectorTrigger.OnEndAnimation.RemoveListener(() => HandleEvent(TriggerEventType.OnEndAnimation, _lastInteractor));
                invectorTrigger.OnPlayerEnter.RemoveListener(HandlePlayerEnter);
                invectorTrigger.OnPlayerExit.RemoveListener(HandlePlayerExit);
                invectorTrigger.OnValidate.RemoveListener((interactor) => HandleEvent(TriggerEventType.OnValidate, interactor));
                invectorTrigger.OnInvalidate.RemoveListener((interactor) => HandleEvent(TriggerEventType.OnInvalidate, interactor));
            }
        }
        
        private void HandlePlayerEnter(GameObject interactor)
        {
            _lastInteractor = interactor;
            HandleEvent(TriggerEventType.OnPlayerEnter, interactor);
        }
        
        private void HandlePlayerExit(GameObject interactor)
        {
            HandleEvent(TriggerEventType.OnPlayerExit, interactor);
            _lastInteractor = null;
        }

        private void OnConversationEnded(Transform actor)
        {
            if (_lastInteractor != null && actor.gameObject == _lastInteractor)
            {
                HandleEvent(TriggerEventType.OnConversationEnd, actor.gameObject);
            }
        }

        private void HandleEvent(TriggerEventType eventType, GameObject interactor)
        {
            foreach (var action in actions)
            {
                if (action.triggerEvent == eventType)
                {
                    // Check if the optional Dialogue System condition is met
                    if (action.condition == null || action.condition.IsTrue(interactor?.transform))
                    {
                        PerformAction(action, interactor);
                    }
                }
            }
        }

        private void PerformAction(TriggeredAction action, GameObject interactor)
        {
            var actorTransform = interactor?.transform;

            switch (action.actionType)
            {
                case ActionType.StartConversation:
                    if (!string.IsNullOrEmpty(action.conversation))
                    {
                        Transform conversant = action.conversant != null ? action.conversant : this.transform;
                        DialogueManager.StartConversation(action.conversation, actorTransform, conversant);
                    }
                    break;
                    
                case ActionType.ExecuteLua:
                    if (!string.IsNullOrEmpty(action.luaCode))
                    {
                        Lua.Run(action.luaCode, true);
                    }
                    break;
                    
                case ActionType.SendQuestMachineMessage:
                    if (!string.IsNullOrEmpty(action.questMachineMessage))
                    {
                        QuestMachineMessages.SendCompositeMessage(this, action.questMachineMessage);
                    }
                    break;
                    
                case ActionType.SetQuestState:
                    if (!string.IsNullOrEmpty(action.questID))
                    {
                        QuestMachine.SetQuestState(action.questID, action.questState);
                    }
                    break;
                    
                case ActionType.SetQuestNodeState:
                    if (!string.IsNullOrEmpty(action.questID) && !string.IsNullOrEmpty(action.questNodeID))
                    {
                        QuestMachine.SetQuestNodeState(action.questID, action.questNodeID, action.questNodeState);
                    }
                    break;
                    
                case ActionType.InvokeUnityEvent:
                    action.onExecute?.Invoke();
                    break;
            }
        }
        
        #endregion
    }

    #region --- Action Definitions (Enums and Class) ---

    public enum TriggerEventType
    {
        OnPlayerEnter,
        OnPlayerExit,
        OnValidate,
        OnInvalidate,
        OnPressActionInput,
        OnStartAnimation,
        OnEndAnimation,
        OnConversationEnd
    }

    public enum ActionType
    {
        StartConversation,
        ExecuteLua,
        SendQuestMachineMessage,
        SetQuestState,
        SetQuestNodeState,
        InvokeUnityEvent
    }

    [System.Serializable]
    public class TriggeredAction
    {
        [HorizontalGroup("Top", 120)]
        [BoxGroup("Top/Trigger", showLabel: false)]
        [EnumToggleButtons, HideLabel]
        public TriggerEventType triggerEvent;

        [BoxGroup("Top/Action", showLabel: false)]
        [EnumToggleButtons, HideLabel]
        public ActionType actionType;

        [BoxGroup("Settings")]
        [Tooltip("Optional Dialogue System condition that must be true for this action to fire.")]
        [DrawWithUnity] // <-- Tells Odin to use the Pixel Crushers drawer for this field.
        public Condition condition;

        [BoxGroup("Settings")]
        [ShowIf("actionType", ActionType.StartConversation)]
        [ConversationPopup(false)] // <-- The Dialogue System attribute that creates the dropdown.
        [DrawWithUnity] // <-- The Odin attribute that allows the above attribute to work.
        public string conversation;
        
        [BoxGroup("Settings")]
        [ShowIf("actionType", ActionType.StartConversation)]
        [Tooltip("The other participant in the conversation. If unassigned, this trigger object will be the conversant.")]
        public Transform conversant;

        [BoxGroup("Settings")]
        [ShowIf("actionType", ActionType.ExecuteLua)]
        [TextArea(2, 5)]
        public string luaCode;

        [BoxGroup("Settings")]
        [ShowIf("actionType", ActionType.SendQuestMachineMessage)]
        public string questMachineMessage;

        [BoxGroup("Settings")]
        [ShowIf("@this.actionType == ActionType.SetQuestState || this.actionType == ActionType.SetQuestNodeState")]
        [DrawWithUnity] // <-- Tells Odin to use the Quest Machine drawer for the quest ID field.
        public string questID;
        
        [BoxGroup("Settings")]
        [ShowIf("actionType", ActionType.SetQuestState)]
        public PixelCrushers.QuestMachine.QuestState questState;
        
        [BoxGroup("Settings")]
        [ShowIf("actionType", ActionType.SetQuestNodeState)]
        [DrawWithUnity] // <-- Tells Odin to use the Quest Machine drawer for the node ID field.
        public string questNodeID;
        
        [BoxGroup("Settings")]
        [ShowIf("actionType", ActionType.SetQuestNodeState)]
        public PixelCrushers.QuestMachine.QuestNodeState questNodeState;

        [BoxGroup("Settings")]
        [ShowIf("actionType", ActionType.InvokeUnityEvent)]
        public UnityEvent onExecute;
    }

    #endregion
}