using UnityEngine;

/// <summary>
/// Example script showing how to interact with the Quest system
/// Attach to objects that trigger quest progression (enemies, items, zones, etc.)
/// </summary>
public class QuestTrigger : MonoBehaviour
{
    [Header("Quest Trigger Settings")]
    [Tooltip("The quest ID this trigger affects")]
    public string questId;
    
    [Tooltip("How much progress to add when triggered")]
    public int progressAmount = 1;
    
    [Tooltip("Trigger type")]
    public TriggerType triggerType = TriggerType.OnTriggerEnter;
    
    [Tooltip("Tag required to trigger (e.g., 'Player')")]
    public string requiredTag = "Player";
    
    [Tooltip("Destroy this GameObject after triggering")]
    public bool destroyAfterTrigger = false;
    
    [Tooltip("Only trigger once")]
    public bool triggerOnce = true;
    
    private bool hasTriggered = false;

    public enum TriggerType
    {
        OnTriggerEnter,
        OnCollisionEnter,
        Manual
    }

    void OnTriggerEnter(Collider other)
    {
        if (triggerType == TriggerType.OnTriggerEnter)
        {
            TryTrigger(other.gameObject);
        }
    }

    void OnCollisionEnter(Collision collision)
    {
        if (triggerType == TriggerType.OnCollisionEnter)
        {
            TryTrigger(collision.gameObject);
        }
    }

    /// <summary>
    /// Manually trigger quest progress (call from other scripts)
    /// </summary>
    public void ManualTrigger(GameObject triggerer = null)
    {
        if (triggerType == TriggerType.Manual || triggerType == TriggerType.OnTriggerEnter)
        {
            TryTrigger(triggerer);
        }
    }

    void TryTrigger(GameObject triggerer)
    {
        // Check if already triggered
        if (hasTriggered && triggerOnce)
            return;

        // Check tag requirement
        if (triggerer != null && !string.IsNullOrEmpty(requiredTag))
        {
            if (!triggerer.CompareTag(requiredTag))
                return;
        }

        // Check if QuestManager exists
        if (QuestManager.Instance == null)
        {
            Debug.LogWarning("QuestManager not found in scene.", gameObject);
            return;
        }

        // Check if quest is active
        if (!QuestManager.Instance.IsQuestActive(questId))
        {
            Debug.Log($"Quest '{questId}' is not active. Cannot progress.", gameObject);
            return;
        }

        // Progress the quest
        bool progressed = QuestManager.Instance.ProgressQuest(questId, progressAmount);
        if (progressed)
        {
            hasTriggered = true;
            Debug.Log($"Quest '{questId}' progressed by {progressAmount}", gameObject);

            // Destroy if configured
            if (destroyAfterTrigger)
            {
                Destroy(gameObject);
            }
        }
    }
}