// ─────────────────────────────────────────────────────────────────────────────
//  WLEquipIcons.cs — 아이템 → 아이콘 스프라이트·색조 (#824 · 2026-10-09)
//
//  무기(부위 1) = XP Hero 무기 아이콘(그룹 → 등급 7단계 순 변형 · WLEquipGui.json weaponIcons)
//  그 외 부위 = 임시 플랫 아이콘(partIcons) + 같은 부위 안 그룹 구분용 색조(groupTints) — ComfyUI 제작분으로 교체 예정
//  소모품 = consumableIcons(골드·강화석) · 없으면 null
// ─────────────────────────────────────────────────────────────────────────────

using System.Collections.Generic;
using UnityEngine;

namespace WL.Equip
{
    public static class WLEquipIcons
    {
        static readonly Dictionary<int, int> s_groupRank = new Dictionary<int, int>();   // GroupNo → 부위 안 순번
        static bool s_rankBuilt;

        static void BuildRanks()
        {
            if (s_rankBuilt) return;
            s_rankBuilt = true;
            var perPart = new Dictionary<int, List<int>>();
            var items = WLEquipTables.Items;
            for (int i = 0; i < items.Count; i++)
            {
                var j = items[i];
                if (!j.IsEquipment) continue;
                List<int> l;
                if (!perPart.TryGetValue((int)j.EquipmentType, out l)) { l = new List<int>(); perPart[(int)j.EquipmentType] = l; }
                if (!l.Contains(j.GroupNo)) l.Add(j.GroupNo);
            }
            foreach (var kv in perPart)
            {
                kv.Value.Sort();
                for (int i = 0; i < kv.Value.Count; i++) s_groupRank[kv.Value[i]] = i;
            }
        }

        public static Color GroupTint(int groupNo)
        {
            var cfg = WLEquipGuiAssets.Config;
            if (cfg.groupTints == null || cfg.groupTints.list == null || cfg.groupTints.list.Count == 0) return Color.white;
            BuildRanks();
            int rank;
            if (!s_groupRank.TryGetValue(groupNo, out rank)) rank = 0;
            var c = cfg.groupTints.list[rank % cfg.groupTints.list.Count];
            if (c == null || c.Length < 3) return Color.white;
            return new Color(c[0], c[1], c[2], c.Length >= 4 ? c[3] : 1f);
        }

        /// <summary>아이템의 아이콘. tint = 아이콘에 곱할 색(무기·소모품은 흰색).</summary>
        public static Sprite For(ItemJson j, out Color tint)
        {
            tint = Color.white;
            var cfg = WLEquipGuiAssets.Config;
            if (j == null) return null;
            if (j.IsEquipment)
            {
                int tier = 1, plus;
                WLGradeTier t;
                if (WLEquipGrades.TryMap(j, out t, out plus)) tier = t.tier;
                if (j.EquipmentType == eFREquipmentType.Weapon)
                {
                    List<string> list;
                    if (cfg.weaponIcons != null && cfg.weaponIcons.TryGetValue(j.GroupNo.ToString(), out list) && list != null && list.Count > 0)
                        return WLEquipGuiAssets.Get(list[Mathf.Clamp(tier - 1, 0, list.Count - 1)]);
                    return WLEquipGuiAssets.Get("W_Sword");
                }
                string pname;
                if (cfg.partIcons != null && cfg.partIcons.TryGetValue(((int)j.EquipmentType).ToString(), out pname))
                {
                    tint = GroupTint(j.GroupNo);
                    return WLEquipGuiAssets.Get(pname);
                }
                return null;
            }
            string cname0;
            if (cfg.consumableIcons != null && cfg.consumableIcons.TryGetValue(j.Index.ToString(), out cname0)) return WLEquipGuiAssets.Get(cname0);
            return null;
        }

        /// <summary>부위 아이콘(탭·빈 슬롯 표시용 · partIcons). 없으면 null.</summary>
        public static Sprite PartIcon(eFREquipmentType t)
        {
            var cfg = WLEquipGuiAssets.Config;
            string pname;
            if (cfg.partIcons != null && cfg.partIcons.TryGetValue(((int)t).ToString(), out pname)) return WLEquipGuiAssets.Get(pname);
            return null;
        }

        public static Sprite TierBg(int tier)
        {
            var t = WLEquipGuiAssets.Config.Tier(tier);
            return t != null ? WLEquipGuiAssets.Get(t.bg) : null;
        }

        public static Sprite TierLabel(int tier)
        {
            var t = WLEquipGuiAssets.Config.Tier(tier);
            return t != null ? WLEquipGuiAssets.Get(t.label) : null;
        }

        public static Color TierColor(int tier)
        {
            var t = WLEquipGrades.Tier(tier);
            Color c;
            if (t != null && !string.IsNullOrEmpty(t.color) && ColorUtility.TryParseHtmlString(t.color, out c)) return c;
            return Color.white;
        }
    }
}