using System.Collections.Generic;

using UnityEngine;

namespace Colosseum.Skills
{
    /// <summary>
    /// 플레이어가 슬롯별로 사용할 스킬/젬 조합 프리셋입니다.
    /// </summary>
    [CreateAssetMenu(fileName = "NewPlayerLoadoutPreset", menuName = "Colosseum/Player Loadout Preset")]
    public class PlayerLoadoutPreset : ScriptableObject
    {
        private const int DefaultSlotCount = 7;

        [Header("기본 정보")]
        [SerializeField] private string presetName;
        [TextArea(2, 4)]
        [SerializeField] private string description;

        [Header("슬롯 구성")]
        [SerializeField] private SkillLoadoutEntry[] slots = new SkillLoadoutEntry[DefaultSlotCount];

        public string PresetName => presetName;
        public string Description => description;
        public IReadOnlyList<SkillLoadoutEntry> Slots => slots;

        private void OnValidate()
        {
            EnsureSlotCapacity();
        }

        public void EnsureSlotCapacity(int slotCount = DefaultSlotCount)
        {
            slotCount = Mathf.Max(0, slotCount);
            if (slots != null && slots.Length == slotCount)
            {
                EnsureGemSlots();
                return;
            }

            SkillLoadoutEntry[] resized = new SkillLoadoutEntry[slotCount];
            if (slots != null)
            {
                int copyCount = Mathf.Min(slots.Length, resized.Length);
                for (int i = 0; i < copyCount; i++)
                {
                    resized[i] = slots[i];
                }
            }

            slots = resized;
            EnsureGemSlots();
        }

        private void EnsureGemSlots()
        {
            if (slots == null)
                return;

            for (int i = 0; i < slots.Length; i++)
            {
                if (slots[i] == null)
                    slots[i] = new SkillLoadoutEntry();

                slots[i].EnsureGemSlotCapacity();
            }
        }
    }
}