#nullable enable
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UIElements;
using UVC.UIToolkit;
using UVC.UI.Commands;
using UVC.Log;

namespace UVC.Sample.UIToolkit
{
    /// <summary>
    /// UTKToolBar 독립 실행 샘플 코드입니다.
    /// 가로/세로 배치 전환, 4가지 버튼 타입, 구분선을 데모합니다.
    /// </summary>
    public class UTKToolBarSample : MonoBehaviour
    {
        [SerializeField] private UIDocument? _uiDocument;

        [SerializeField]
        [Tooltip("시작 시 적용할 테마")]
        private UTKTheme initialTheme = UTKTheme.Dark;

        private UTKToggle? _themeToggle;
        private VisualElement? _root;
        private UTKToolBar? _horizontalToolBar;
        private UTKToolBar? _verticalToolBar;
        private UTKToolBarModel? _horizontalModel;
        private UTKToolBarModel? _verticalModel;
        private Label? _eventLabel;
        private readonly List<string> _eventLogs = new();
        private const int MaxLogLines = 8;

        private void Start()
        {
            // UIDocument 참조 확인
            var doc = GetComponent<UIDocument>();
            if (doc == null)
            {
                Debug.LogError("UIDocument가 할당되지 않았습니다.");
                return;
            }
            _uiDocument = doc;
            _root = _uiDocument.rootVisualElement;

            UTKThemeManager.Instance.RegisterRoot(_root);
            UTKThemeManager.Instance.SetTheme(initialTheme);

            // 테마 토글
            _themeToggle = _root.Q<UTKToggle>("toggle");
            if (_themeToggle != null)
            {
                _themeToggle.OnValueChanged += (isOn) =>
                {
                    UTKThemeManager.Instance.SetTheme(!isOn ? UTKTheme.Dark : UTKTheme.Light);
                };
            }

            // 툴바 영역
            var toolbarArea = _root.Q<VisualElement>("toolbar-area");
            if (toolbarArea == null)
            {
                toolbarArea = new VisualElement();
                toolbarArea.style.flexDirection = FlexDirection.Column;
                toolbarArea.style.paddingTop = 8;
                toolbarArea.style.paddingLeft = 8;
                toolbarArea.style.paddingRight = 8;
                _root.Add(toolbarArea);
            }

            // 이벤트 라벨
            _eventLabel = new Label("(버튼을 클릭하면 여기에 이벤트가 표시됩니다)");
            _eventLabel.style.fontSize = 11;
            _eventLabel.style.whiteSpace = WhiteSpace.Normal;
            _eventLabel.style.marginTop = 12;

            CreateHorizontalToolBar(toolbarArea);
            CreateVerticalToolBar(toolbarArea);

            toolbarArea.Add(_eventLabel);
        }

        /// <summary>
        /// 가로 툴바를 생성합니다.
        /// </summary>
        private void CreateHorizontalToolBar(VisualElement parent)
        {
            var label = new Label("Horizontal Toolbar");    
            label.style.fontSize = 14;
            label.style.marginTop = 8;
            label.style.marginBottom = 4;
            parent.Add(label);

            _horizontalModel = new UTKToolBarModel();

            // Standard
            _horizontalModel.AddStandardButton("", UTKMaterialIcons.Save, new DebugLogCommand("저장"), "파일 저장");
            _horizontalModel.AddStandardButton("", UTKMaterialIcons.Undo, new DebugLogCommand("실행 취소"));
            _horizontalModel.AddStandardButton("", UTKMaterialIcons.Redo, new DebugLogCommand("다시 실행"));

            _horizontalModel.AddSeparator();

            // Toggle
            _horizontalModel.AddToggleButton("", false, UTKMaterialIcons.GridOn, UTKMaterialIcons.GridOff, tooltip: "그리드 표시/숨김");
            _horizontalModel.AddToggleButton("", false, UTKMaterialIcons.FilterCenterFocus, UTKMaterialIcons.CenterFocusWeak, tooltip: "스냅 활성화");

            _horizontalModel.AddSeparator();

            // Radio
            _horizontalModel.AddRadioButton("tool", "", true, UTKMaterialIcons.NearMe, tooltip: "선택 도구");
            _horizontalModel.AddRadioButton("tool", "", false, UTKMaterialIcons.OpenWith, tooltip: "이동 도구");
            _horizontalModel.AddRadioButton("tool", "", false, UTKMaterialIcons.Refresh, tooltip: "회전 도구");

            _horizontalModel.AddSeparator();

            // Expandable
            var shapeBtn = _horizontalModel.AddExpandableButton("", UTKMaterialIcons.Category, tooltip: "도형 추가", updateIconOnSelection: true);
            shapeBtn.SubButtons.Add(new UTKToolBarStandardButtonData { Text = "", IconPath = UTKMaterialIcons.CropSquare, UseMaterialIcon = true, Tooltip = "사각형 추가" });
            shapeBtn.SubButtons.Add(new UTKToolBarStandardButtonData { Text = "", IconPath = UTKMaterialIcons.Circle, UseMaterialIcon = true, Tooltip = "원형 추가" });
            shapeBtn.SubButtons.Add(new UTKToolBarStandardButtonData { Text = "", IconPath = UTKMaterialIcons.ChangeHistory, UseMaterialIcon = true, Tooltip = "삼각형 추가" });

            _horizontalToolBar = new UTKToolBar();
            _horizontalToolBar.Orientation = UTKToolBarOrientation.Horizontal;
            _horizontalToolBar.OnAction += OnToolBarAction;
            _horizontalToolBar.BuildToolBar(_horizontalModel);

            parent.Add(_horizontalToolBar);
        }

        /// <summary>
        /// 세로 툴바를 생성합니다.
        /// </summary>
        private void CreateVerticalToolBar(VisualElement parent)
        {
            var label = new Label("Vertical Toolbar");
            label.style.fontSize = 14;
            label.style.marginTop = 12;
            label.style.marginBottom = 4;
            parent.Add(label);

            _verticalModel = new UTKToolBarModel();

            _verticalModel.AddStandardButton("", UTKMaterialIcons.Save, new DebugLogCommand("세로: 저장"), "저장");
            _verticalModel.AddStandardButton("", UTKMaterialIcons.Undo, new DebugLogCommand("세로: 실행 취소"), "실행 취소");

            _verticalModel.AddSeparator();

            _verticalModel.AddToggleButton("", false, UTKMaterialIcons.Visibility, UTKMaterialIcons.VisibilityOff, tooltip: "표시/숨김");
            _verticalModel.AddToggleButton("", false, UTKMaterialIcons.Lock, UTKMaterialIcons.LockOpen, tooltip: "잠금/해제");

            _verticalModel.AddSeparator();

            _verticalModel.AddRadioButton("vtool", "", true, UTKMaterialIcons.NearMe, tooltip: "선택 도구");
            _verticalModel.AddRadioButton("vtool", "", false, UTKMaterialIcons.OpenWith, tooltip: "이동 도구");
            _verticalModel.AddRadioButton("vtool", "", false, UTKMaterialIcons.Refresh, tooltip: "회전 도구");

            _verticalModel.AddSeparator();

            // Expandable
            var shapeBtn = _verticalModel.AddExpandableButton("", UTKMaterialIcons.Category, tooltip: "도형 추가", updateIconOnSelection: true);
            shapeBtn.SubButtons.Add(new UTKToolBarStandardButtonData { Text = "사각형", IconPath = UTKMaterialIcons.CropSquare, UseMaterialIcon = true });
            shapeBtn.SubButtons.Add(new UTKToolBarStandardButtonData { Text = "원형", IconPath = UTKMaterialIcons.Circle, UseMaterialIcon = true });
            shapeBtn.SubButtons.Add(new UTKToolBarStandardButtonData { Text = "삼각형", IconPath = UTKMaterialIcons.ChangeHistory, UseMaterialIcon = true });

            _verticalToolBar = new UTKToolBar();
            _verticalToolBar.Orientation = UTKToolBarOrientation.Vertical;
            _verticalToolBar.OnAction += OnToolBarAction;
            _verticalToolBar.BuildToolBar(_verticalModel);

            parent.Add(_verticalToolBar);
        }

        /// <summary>
        /// 툴바 액션 이벤트 핸들러
        /// </summary>
        private void OnToolBarAction(UTKToolBarActionEventArgs args)
        {
            string valueStr = args.Value != null ? args.Value.ToString() ?? "" : "null";
            string logEntry = $"[{args.ActionType}] {args.Text}: {valueStr}";
            ULog.Debug($"[UTKToolBar Sample] {logEntry}");
            AppendLog(logEntry);
        }

        /// <summary>
        /// 이벤트 로그에 항목을 추가합니다.
        /// </summary>
        private void AppendLog(string message)
        {
            _eventLogs.Add(message);
            while (_eventLogs.Count > MaxLogLines)
            {
                _eventLogs.RemoveAt(0);
            }
            if (_eventLabel != null)
            {
                _eventLabel.text = string.Join("\n", _eventLogs);
            }
        }

        private void OnDestroy()
        {
            if (_horizontalToolBar != null)
            {
                _horizontalToolBar.OnAction -= OnToolBarAction;
                _horizontalToolBar.Dispose();
                _horizontalToolBar = null;
            }

            if (_verticalToolBar != null)
            {
                _verticalToolBar.OnAction -= OnToolBarAction;
                _verticalToolBar.Dispose();
                _verticalToolBar = null;
            }

            _horizontalModel?.Dispose();
            _horizontalModel = null;
            _verticalModel?.Dispose();
            _verticalModel = null;

            _eventLogs.Clear();

            ULog.Debug("UTKToolBarSample 정리 완료");
        }
    }
}