#if UNITY_EDITOR
using UnityEditor;
using UnityEngine;
using System.Collections.Generic;

public class GoogleSheetDiffViewer : EditorWindow
{
    private List<GoogleSheetDiff> _diffs;
    private bool _isReversed; // true: 현재 → 선택버전, false: 변경 전 → 변경 후

    private Vector2 _scroll;

    public static void ShowWindow(List<GoogleSheetDiff> diffs, bool isReversed = false)
    {
        var window = GetWindow<GoogleSheetDiffViewer>("Google Sheet 변경점");
        window._diffs = diffs;
        window._isReversed = isReversed;
        window.Show();
    }

    private void OnGUI()
    {
        EditorGUILayout.LabelField("변경된 항목", EditorStyles.boldLabel);
        EditorGUILayout.Space();

        if (_diffs == null || _diffs.Count == 0)
        {
            EditorGUILayout.HelpBox("변경 사항이 없습니다.", MessageType.Info);
            return;
        }

        // 헤더
        EditorGUILayout.BeginHorizontal("box");
        EditorGUILayout.LabelField("시트", EditorStyles.boldLabel, GUILayout.Width(80));
        EditorGUILayout.LabelField("행", EditorStyles.boldLabel, GUILayout.Width(40));
        EditorGUILayout.LabelField("필드", EditorStyles.boldLabel, GUILayout.Width(100));
        
        GUIStyle oldStyle = new GUIStyle(EditorStyles.label);
        oldStyle.normal.textColor = Color.green;
        EditorGUILayout.LabelField(_isReversed ? "현재 버전" : "변경 전", oldStyle, GUILayout.Width(100));
        
        GUIStyle newStyle = new GUIStyle(EditorStyles.label);
        newStyle.normal.textColor = new Color(0.3f, 0.75f, 1.0f);
        EditorGUILayout.LabelField(_isReversed ? "선택한 버전" : "변경 후", newStyle, GUILayout.Width(100));
        EditorGUILayout.EndHorizontal();

        _scroll = EditorGUILayout.BeginScrollView(_scroll);

        foreach (var diff in _diffs)
        {
            EditorGUILayout.BeginHorizontal("box");

            EditorGUILayout.LabelField(diff.Sheet, GUILayout.Width(80));
            EditorGUILayout.LabelField(diff.RowIndex.ToString(), GUILayout.Width(40));
            EditorGUILayout.LabelField(diff.Field, GUILayout.Width(100));

            string left = _isReversed ? diff.NewValue : diff.OldValue;
            string right = _isReversed ? diff.OldValue : diff.NewValue;

            EditorGUILayout.LabelField(left, oldStyle, GUILayout.Width(100));
            EditorGUILayout.LabelField(right, newStyle, GUILayout.Width(100));

            EditorGUILayout.EndHorizontal();
        }

        EditorGUILayout.EndScrollView();
    }
}
#endif