using System;

using UnityEditor;

using Colosseum.Skills;

namespace Colosseum.Editor
{
    /// <summary>
    /// Animations 폴더 내 애니메이션 클립이 변경(생성/수정/삭제/이동)되면
    /// 관련 SkillData의 애니메이션 클립 목록을 자동 갱신합니다.
    /// </summary>
    public class AnimationClipSkillDataMatcher : AssetPostprocessor
    {
        private const string AnimationsFolderPath = "Assets/_Game/Animations";

        private static void OnPostprocessAllAssets(
            string[] importedAssets,
            string[] deletedAssets,
            string[] movedAssets,
            string[] movedFromAssetPaths)
        {
            bool hasAnimationChange = false;

            for (int i = 0; i < importedAssets.Length; i++)
            {
                if (IsAnimationClipPath(importedAssets[i]))
                {
                    hasAnimationChange = true;
                    break;
                }
            }

            if (!hasAnimationChange)
            {
                for (int i = 0; i < deletedAssets.Length; i++)
                {
                    if (IsAnimationClipPath(deletedAssets[i]))
                    {
                        hasAnimationChange = true;
                        break;
                    }
                }
            }

            if (!hasAnimationChange)
            {
                for (int i = 0; i < movedAssets.Length; i++)
                {
                    if (IsAnimationClipPath(movedAssets[i]) || IsAnimationClipPath(movedFromAssetPaths[i]))
                    {
                        hasAnimationChange = true;
                        break;
                    }
                }
            }

            if (!hasAnimationChange)
                return;

            RefreshAllSkillDataClips();
        }

        /// <summary>
        /// 지정한 경로가 Animations 폴더 내의 애니메이션 클립인지 확인합니다.
        /// </summary>
        private static bool IsAnimationClipPath(string assetPath)
        {
            return assetPath != null
                && assetPath.StartsWith(AnimationsFolderPath)
                && assetPath.EndsWith(".anim", StringComparison.OrdinalIgnoreCase);
        }

        /// <summary>
        /// 모든 SkillData의 애니메이션 클립 목록을 갱신합니다.
        /// </summary>
        private static void RefreshAllSkillDataClips()
        {
            string[] skillGuids = AssetDatabase.FindAssets("t:SkillData");
            int refreshedCount = 0;

            for (int i = 0; i < skillGuids.Length; i++)
            {
                string path = AssetDatabase.GUIDToAssetPath(skillGuids[i]);
                SkillData skillData = AssetDatabase.LoadAssetAtPath<SkillData>(path);
                if (skillData == null) continue;

                int clipCountBefore = skillData.AnimationClips.Count;
                skillData.RefreshAnimationClips();

                if (skillData.AnimationClips.Count != clipCountBefore)
                    refreshedCount++;
            }

            if (refreshedCount > 0)
            {
                AssetDatabase.SaveAssets();
            }
        }
    }
}