using System;
using System.Reflection;
using UnityEngine;
using UnityEngine.Events;

public class TruthFountainReward : MonoBehaviour
{
    [Header("Reward Control")]
    [SerializeField] private bool giveOnlyOnce = true;

    [Header("Optional Auto Call")]
    [Tooltip("MemoryPieceReward 같은 컴포넌트를 넣고 methodName을 GiveReward로 두면 성공 시 자동 호출됩니다. 비워두고 Events에 직접 연결해도 됩니다.")]
    [SerializeField] private MonoBehaviour rewardReceiver;

    [SerializeField] private string rewardMethodName = "GiveReward";

    [Header("Events")]
    public UnityEvent onRewardGiven;
    public UnityEvent onRewardAlreadyGiven;

    [Header("Debug")]
    [SerializeField] private bool showDebugLog = true;

    private bool alreadyGiven;

    public bool AlreadyGiven => alreadyGiven;

    public void GiveReward()
    {
        if (giveOnlyOnce && alreadyGiven)
        {
            onRewardAlreadyGiven?.Invoke();

            if (showDebugLog)
            {
                Debug.Log($"[{nameof(TruthFountainReward)}] 이미 지급된 진실의 샘 보상입니다.");
            }

            return;
        }

        TryCallRewardReceiver();
        alreadyGiven = true;
        onRewardGiven?.Invoke();

        if (showDebugLog)
        {
            Debug.Log($"[{nameof(TruthFountainReward)}] 진실의 샘 보상을 지급했습니다.");
        }
    }

    public void ResetReward()
    {
        alreadyGiven = false;
    }

    private void TryCallRewardReceiver()
    {
        if (rewardReceiver == null || string.IsNullOrWhiteSpace(rewardMethodName))
        {
            return;
        }

        MethodInfo method = rewardReceiver.GetType().GetMethod(
            rewardMethodName,
            BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
            null,
            Type.EmptyTypes,
            null
        );

        if (method == null)
        {
            Debug.LogWarning($"[{nameof(TruthFountainReward)}] {rewardReceiver.name}에서 {rewardMethodName}() 메서드를 찾지 못했습니다.");
            return;
        }

        method.Invoke(rewardReceiver, null);
    }
}