// ─────────────────────────────────────────────────────────────────────────────
//  WLEquipDrops.cs — 던전 클리어 때 FR 드랍표로 장비·강화석 지급 (#821)
//
//  훅 = `WLIslandBridge.OnStageCleared` 의 `WLIslandExpansionGate.Unlock(cfg);` 다음 1줄.
//  FR 의 드랍 규칙(ItemDropGroupTable 10000 분율 → ItemDropPackageTable 가중 추첨)을 그대로 돌린다.
//  값(그룹 ID · 횟수 · 강화석)은 WLEquipSettings.
// ─────────────────────────────────────────────────────────────────────────────

using System.Collections.Generic;
using UnityEngine;
using WL.Combat.Stage;

namespace WL.Equip
{
    public static class WLEquipDrops
    {
        public static string LastGrantLog { get; private set; } = "";
        public static int Grants { get; private set; }
        static readonly System.Random s_rng = new System.Random();
        static readonly List<WLEquipTables.Drop> s_drops = new List<WLEquipTables.Drop>(8);

        public static void OnStageCleared(in StageClearResult r)
        {
            var cfg = WLEquipSettings.Instance;
            if (cfg == null || cfg.enabled_ == 0) return;
            if (!r.win) return;
            int rolls = cfg.clearDropRolls + (r.isBoss ? cfg.bossExtraRolls : 0);
            string log = Grant(cfg.clearDropGroupId, rolls, cfg.clearStoneItemIds, cfg.clearStoneCountEach, cfg.clearGoldBonus);
            Grants++;
            LastGrantLog = "클리어 드랍(" + r.index + ") — " + log;
            if (cfg.verboseLog != 0) Debug.Log("[WL-821] " + LastGrantLog);
        }

        /// <summary>드랍 그룹을 rolls 번 굴려 지급 + 강화석 + 골드. 돌려주는 문자열 = 지급 내역.</summary>
        public static string Grant(int groupId, int rolls, int[] stoneIds, int stoneEach, int goldBonus)
        {
            if (!WLInventory.EnsureLoaded()) return "인벤 로드 실패";
            s_drops.Clear();
            for (int i = 0; i < rolls; i++) WLEquipTables.RollDropGroup(groupId, s_drops, s_rng);
            var gained = new List<Item>();
            var sb = new System.Text.StringBuilder();
            for (int i = 0; i < s_drops.Count; i++)
            {
                WLInventory.AddItem(s_drops[i].itemId, 1, s_drops[i].count, gained);
                var j = WLEquipTables.FindItemJson(s_drops[i].itemId);
                sb.Append(j != null ? j.Item_name : s_drops[i].itemId.ToString()).Append("×").Append(s_drops[i].count).Append(' ');
            }
            if (stoneIds != null && stoneEach > 0)
            {
                for (int i = 0; i < stoneIds.Length; i++) WLInventory.AddItem(stoneIds[i], 1, stoneEach);
                sb.Append("강화석 ").Append(stoneIds.Length).Append("종×").Append(stoneEach).Append(' ');
            }
            if (goldBonus > 0) { WLInventory.AddGold(goldBonus); sb.Append("골드+").Append(goldBonus); }
            WLInventory.Commit("획득 — " + sb);
            return sb.ToString();
        }
    }
}