using UnityEngine;

[CreateAssetMenu(fileName = "GameSettings", menuName = "AppleHills/GameSettings", order = 1)]
public class GameSettings : ScriptableObject
{
    [Header("Interactions")]
    public float playerStopDistance = 6.0f;
    public float followerPickupDelay = 0.2f;

    [Header("Follower Settings")]
    public float followDistance = 1.5f;
    public float manualMoveSmooth = 8f;
    public float thresholdFar = 2.5f;
    public float thresholdNear = 0.5f;
    public float stopThreshold = 0.1f;

    [Header("Player Settings")]
    public float moveSpeed = 5f;
    public float stopDistance = 0.1f;
    public bool useRigidbody = true;

    [Header("Backend Settings")]
    [Tooltip("Technical parameters, not for design tuning")]
    public float followUpdateInterval = 0.1f;
    public float followerSpeedMultiplier = 1.2f;
    public float heldIconDisplayHeight = 2.0f;

    [Header("Default Prefabs")]
    public GameObject basePickupPrefab;

    [System.Serializable]
    public class CombinationRule {
        public PickupItemData itemA;
        public PickupItemData itemB;
        public PickupItemData result;
    }

    [Header("Combination Rules")]
    public System.Collections.Generic.List<CombinationRule> combinationRules;

    // Singleton pattern
    private static GameSettings _instance;
    public static GameSettings Instance {
        get {
            if (_instance == null) {
                _instance = Resources.Load<GameSettings>("GameSettings");
                if (_instance == null) {
                    Debug.LogError("GameSettings asset not found in Resources folder!");
                }
            }
            return _instance;
        }
    }

    // Static property wrappers for easy access
    public static float PlayerStopDistance => Instance.playerStopDistance;
    public static float FollowerPickupDelay => Instance.followerPickupDelay;
    public static float FollowDistance => Instance.followDistance;
    public static float ManualMoveSmooth => Instance.manualMoveSmooth;
    public static float ThresholdFar => Instance.thresholdFar;
    public static float ThresholdNear => Instance.thresholdNear;
    public static float StopThreshold => Instance.stopThreshold;
    public static float MoveSpeed => Instance.moveSpeed;
    public static float StopDistance => Instance.stopDistance;
    public static bool UseRigidbody => Instance.useRigidbody;
    public static float FollowUpdateInterval => Instance.followUpdateInterval;
    public static float FollowerSpeedMultiplier => Instance.followerSpeedMultiplier;
    public static float HeldIconDisplayHeight => Instance.heldIconDisplayHeight;
    public static GameObject BasePickupPrefab => Instance.basePickupPrefab;
}