using System.Collections.Generic;
using System.IO;
using System.Text;

using UnityEditor;
using UnityEngine;

using Colosseum.Combat.Simulation;
using Colosseum.Passives;
using Colosseum.Skills;

namespace Colosseum.Editor
{
    /// <summary>
    /// 허수아비 계산 시뮬레이터의 배치 조사 실행 메뉴입니다.
    /// </summary>
    public static class BuildSimulationBatchCommands
    {
        private const string PlayerSkillFolder = "Assets/_Game/Data/Skills";
        private const string PlayerGemFolder = "Assets/_Game/Data/SkillGems";
        private const string PlayerPassiveFolder = "Assets/_Game/Data/Passives/Nodes";
        private const string PlayerPassiveTreePath = "Assets/_Game/Data/Passives/Data_PassiveTree_Player_Prototype.asset";
        private const string ReportFolder = "BuildSimulationReports";
        private static readonly HashSet<string> DisabledPlayerSkillPaths = new HashSet<string>
        {
            "Assets/_Game/Data/Skills/Data_Skill_Player_회전베기.asset",
            "Assets/_Game/Data/Skills/Data_Skill_Player_돌진.asset",
        };

        /// <summary>
        /// 현재 기준 플레이어 단일 슬롯 데미지 전수 조사를 실행합니다.
        /// </summary>
        [MenuItem("Tools/Colosseum/Simulation/Run Player Damage Sweep")]
        private static void RunPlayerDamageSweep()
        {
            PassiveTreeData passiveTree = AssetDatabase.LoadAssetAtPath<PassiveTreeData>(PlayerPassiveTreePath);
            if (passiveTree == null)
            {
                Debug.LogError($"[BuildSimulationBatch] 패시브 트리를 찾지 못했습니다. | Path={PlayerPassiveTreePath}");
                return;
            }

            BuildSimulationInput template = new BuildSimulationInput();
            template.SetBuildName("플레이어_단일슬롯_데미지전수");

            SimulationRuleSet ruleSet = new SimulationRuleSet();
            ruleSet.Configure("PlayerDamageSweep10s", 10f, 1, 0f, 0f);

            RotationPolicy rotationPolicy = new RotationPolicy();
            rotationPolicy.Configure("Slot0Only", new[] { 0 }, false, 0, false, 5, 0f);

            SimulationCombinationSpec combinationSpec = new SimulationCombinationSpec();
            combinationSpec.Configure(
                "PlayerDamageSweep",
                combineSkills: true,
                combineGems: true,
                combinePassives: true,
                activeSlotIndices: new[] { 0 },
                allowDuplicateSkills: false,
                includeEmptyGemSet: true,
                passiveTree: passiveTree,
                includeEmptyPassiveSelection: true,
                maxPassiveNodeCount: 0,
                maxBuildCount: 50000);

            List<string> warnings = new List<string>();
            List<SkillData> skills = LoadPlayerSkills(warnings);
            List<SkillGemData> gems = LoadAssetsInFolder<SkillGemData>(PlayerGemFolder);
            List<PassiveNodeData> passiveNodes = LoadAssetsInFolder<PassiveNodeData>(PlayerPassiveFolder);

            List<BuildSimulationInput> builds = SimulationCombinationGenerator.GenerateBuilds(
                template,
                combinationSpec,
                skills,
                gems,
                passiveNodes,
                warnings,
                out bool truncated);

            SimulationBatchResult result = SimulationBatchRunner.Run(
                combinationSpec.BatchName,
                builds,
                ruleSet,
                rotationPolicy,
                warnings,
                truncated);

            string reportDirectory = Path.Combine(Path.GetDirectoryName(Application.dataPath) ?? Application.dataPath, ReportFolder);
            Directory.CreateDirectory(reportDirectory);

            string timestamp = System.DateTime.Now.ToString("yyyyMMdd_HHmmss");
            string markdownPath = Path.Combine(reportDirectory, $"PlayerDamageSweep_{timestamp}.md");
            string csvPath = Path.Combine(reportDirectory, $"PlayerDamageSweep_{timestamp}.csv");

            File.WriteAllText(markdownPath, SimulationBatchReportUtility.BuildMarkdown(result), Encoding.UTF8);
            File.WriteAllText(csvPath, SimulationBatchReportUtility.BuildCsv(result), Encoding.UTF8);

            Debug.Log(BuildSummary(result, markdownPath, csvPath));
        }

        private static List<SkillData> LoadPlayerSkills(List<string> warnings)
        {
            List<SkillData> skills = LoadAssetsInFolder<SkillData>(PlayerSkillFolder);
            List<SkillData> filtered = new List<SkillData>();
            for (int i = 0; i < skills.Count; i++)
            {
                SkillData skill = skills[i];
                if (skill == null || !skill.name.StartsWith("Data_Skill_Player_", System.StringComparison.Ordinal))
                    continue;

                string assetPath = AssetDatabase.GetAssetPath(skill);
                if (DisabledPlayerSkillPaths.Contains(assetPath))
                {
                    warnings?.Add($"애니메이션 미구현 스킬 제외: {skill.SkillName}");
                    continue;
                }

                filtered.Add(skill);
            }

            return filtered;
        }

        private static List<T> LoadAssetsInFolder<T>(string folderPath) where T : Object
        {
            List<T> assets = new List<T>();
            string[] guids = AssetDatabase.FindAssets($"t:{typeof(T).Name}", new[] { folderPath });
            for (int i = 0; i < guids.Length; i++)
            {
                string assetPath = AssetDatabase.GUIDToAssetPath(guids[i]);
                T asset = AssetDatabase.LoadAssetAtPath<T>(assetPath);
                if (asset != null)
                    assets.Add(asset);
            }

            return assets;
        }

        private static string BuildSummary(SimulationBatchResult result, string markdownPath, string csvPath)
        {
            StringBuilder builder = new StringBuilder();
            builder.Append("[BuildSimulationBatch] 플레이어 단일 슬롯 데미지 전수 조사 완료");
            builder.Append(" | Builds=");
            builder.Append(result.GeneratedBuildCount);
            builder.Append(" | Truncated=");
            builder.Append(result.Truncated);
            builder.Append(" | Markdown=");
            builder.Append(markdownPath);
            builder.Append(" | CSV=");
            builder.Append(csvPath);

            int topCount = Mathf.Min(10, result.Entries.Count);
            for (int i = 0; i < topCount; i++)
            {
                SimulationBatchEntry entry = result.Entries[i];
                SimulationResult simulation = entry != null ? entry.Result : null;
                if (simulation == null)
                    continue;

                builder.AppendLine();
                builder.Append('#');
                builder.Append(i + 1);
                builder.Append(' ');
                builder.Append(entry.BuildLabel);
                builder.Append(" | DPS=");
                builder.Append(simulation.AverageDps.ToString("0.##"));
                builder.Append(" | Dmg=");
                builder.Append(simulation.TotalDamage.ToString("0.##"));
                builder.Append(" | Mana=");
                builder.Append(simulation.TotalManaUsed.ToString("0.##"));
            }

            return builder.ToString();
        }
    }
}