using System;
using System.Collections.Generic;
using System.Globalization;
using UnityEngine;

namespace TKS
{
    /// <summary>
    /// 적 AI 점수 가중치(PD #1098 · 전술규칙_적AI_기획서 §2-3 · SOT = Assets/Data/AI/ai_weights.csv = 기획 tables/ 사본) →
    /// Resources/AI/AiWeights(메뉴 TKS/Import Gimmicks 가 함께 임포트). 코드는 키 이름만 안다(C45).
    /// </summary>
    public class AiWeights : ScriptableObject
    {
        public const string CsvPath = "Data/AI/ai_weights.csv"; // Assets/ 아래
        public const string ResourcePath = "AI/AiWeights";

        /// <summary>코드가 읽는 키(표에 없으면 임포트 오류).</summary>
        public static readonly string[] Keys =
        {
            "dmg_player", "kill_base", "kill_hp_ratio", "dmg_own", "gimmick_dest_bonus", "chain", "support_reach", "pierce_hit",
            "archer_cover", "high_ground", "cav_line", "splash_hit", "route_open", "zone_end", "banner", "skill_waste", "approach", "boss_accuracy", "mode_accuracy",
            "noise_power", "top_n", "dirs", "dirs_many", "many_units", "power_1", "power_2", "power_3", "budget_ms", "boss_active", "active_max_chapter"
        };

        [Serializable]
        public class Entry
        {
            public string key;
            public float value;
            public string desc;
        }

        public List<Entry> entries = new List<Entry>();
        Dictionary<string, float> index;

        public float this[string key]
        {
            get
            {
                if (index == null)
                {
                    index = new Dictionary<string, float>();
                    foreach (var e in entries) index[e.key] = e.value;
                }
                float v;
                if (index.TryGetValue(key, out v)) return v;
                Debug.LogError("[TKS] ai_weights.csv 에 키 없음: " + key);
                return 0f;
            }
        }

        static AiWeights cached;

        public static AiWeights Load()
        {
            if (cached == null) cached = Resources.Load<AiWeights>(ResourcePath);
            return cached;
        }

        public static void Invalidate()
        {
            cached = null;
        }

        /// <summary>CSV(key,value,desc_ko) 해석 · 키 누락·숫자 아님 = errors.</summary>
        public static List<Entry> Parse(string text, List<string> errors)
        {
            var list = new List<Entry>();
            var seen = new HashSet<string>();
            foreach (var r in StageTable.ReadCsv(text, "ai_weights.csv", errors))
            {
                string k, v, d;
                r.TryGetValue("key", out k);
                r.TryGetValue("value", out v);
                r.TryGetValue("desc_ko", out d);
                float f;
                if (string.IsNullOrEmpty(k) || !float.TryParse(v, NumberStyles.Float, CultureInfo.InvariantCulture, out f))
                {
                    errors.Add("ai_weights.csv 줄 " + r["#"] + ": key·value 형식(「" + k + "」 · 「" + v + "」)");
                    continue;
                }
                if (!seen.Add(k)) errors.Add("ai_weights.csv 줄 " + r["#"] + ": key 중복 「" + k + "」");
                list.Add(new Entry { key = k, value = f, desc = d ?? "" });
            }
            foreach (var k in Keys)
            {
                if (!seen.Contains(k)) errors.Add("ai_weights.csv: 키 없음 「" + k + "」");
            }
            return list;
        }
    }
}