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;
    public enum HoldMovementMode { Pathfinding, Direct }
    public HoldMovementMode defaultHoldMovementMode = HoldMovementMode.Pathfinding;

    [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;

    [Header("Endless Descender Settings")]
    [Tooltip("How quickly the character follows the finger horizontally (higher = more responsive)")]
    public float endlessDescenderLerpSpeed = 12f;
    [Tooltip("Maximum horizontal offset allowed between character and finger position")]
    public float endlessDescenderMaxOffset = 3f;
    [Tooltip("Minimum allowed X position for endless descender movement")]
    public float endlessDescenderClampXMin = -3.5f;
    [Tooltip("Maximum allowed X position for endless descender movement")]
    public float endlessDescenderClampXMax = 3.5f;
    [Tooltip("Exponent for speed drop-off curve (higher = sharper drop near target)")]
    public float endlessDescenderSpeedExponent = 2.5f;

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

    [System.Serializable]
    public class SlotItemConfig {
        public PickupItemData slotItem; // The slot object (SO reference)
        public System.Collections.Generic.List<PickupItemData> allowedItems;
        public System.Collections.Generic.List<PickupItemData> forbiddenItems;
    }

    [Header("Item Configuration")]
    public System.Collections.Generic.List<CombinationRule> combinationRules;
    public System.Collections.Generic.List<SlotItemConfig> slotItemConfigs;

    // 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;
    public static float EndlessDescenderLerpSpeed => Instance.endlessDescenderLerpSpeed;
    public static float EndlessDescenderMaxOffset => Instance.endlessDescenderMaxOffset;
    public static float EndlessDescenderClampXMin => Instance.endlessDescenderClampXMin;
    public static float EndlessDescenderClampXMax => Instance.endlessDescenderClampXMax;
    public static float EndlessDescenderSpeedExponent => Instance.endlessDescenderSpeedExponent;
}