using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using UnityEngine.InputSystem.UI;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine.SceneManagement;

public static class PauseMenuBuilder
{
    private static DefaultControls.Resources uiResources;
    private static Font standardFont;

    [MenuItem("Tools/Add Pause Menu to SampleScene")]
    public static string Build()
    {
        standardFont = Resources.GetBuiltinResource<Font>("LegacyRuntime.ttf");
        if (standardFont == null)
            standardFont = Resources.GetBuiltinResource<Font>("Arial.ttf");

        uiResources = new DefaultControls.Resources
        {
            standard = AssetDatabase.GetBuiltinExtraResource<Sprite>("UI/Skin/UISprite.psd"),
            background = AssetDatabase.GetBuiltinExtraResource<Sprite>("UI/Skin/Background.psd"),
            knob = AssetDatabase.GetBuiltinExtraResource<Sprite>("UI/Skin/Knob.psd"),
            checkmark = AssetDatabase.GetBuiltinExtraResource<Sprite>("UI/Skin/Checkmark.psd"),
            dropdown = AssetDatabase.GetBuiltinExtraResource<Sprite>("UI/Skin/DropdownArrow.psd"),
            mask = AssetDatabase.GetBuiltinExtraResource<Sprite>("UI/Skin/UIMask.psd")
        };

        // Открываем сцену геймплея
        Scene gameplayScene = EditorSceneManager.OpenScene("Assets/Scenes/SampleScene.unity", OpenSceneMode.Single);

        // Проверяем EventSystem
        if (Object.FindAnyObjectByType<EventSystem>() == null)
        {
            GameObject esGo = new GameObject("EventSystem");
            esGo.AddComponent<EventSystem>();
            esGo.AddComponent<InputSystemUIInputModule>();
        }

        // Пересоздаем PauseCanvas
        var old = GameObject.Find("PauseCanvas");
        if (old != null) Object.DestroyImmediate(old);

        // Создаем Canvas паузы
        GameObject canvasGo = new GameObject("PauseCanvas");
        Canvas canvas = canvasGo.AddComponent<Canvas>();
        canvas.renderMode = RenderMode.ScreenSpaceOverlay;
        canvas.sortingOrder = 100; // Поверх игрового мира

        CanvasScaler scaler = canvasGo.AddComponent<CanvasScaler>();
        scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
        scaler.referenceResolution = new Vector2(1920, 1080);
        scaler.screenMatchMode = CanvasScaler.ScreenMatchMode.MatchWidthOrHeight;
        scaler.matchWidthOrHeight = 0.5f;

        canvasGo.AddComponent<GraphicRaycaster>();

        PauseMenu pauseMenu = canvasGo.AddComponent<PauseMenu>();

        // Цвета стилистики Главного Меню (Synthesia Minimalist Black & Yellow)
        Color yellowBtnNormal = new Color(0.95f, 0.78f, 0.12f, 1.00f);
        Color yellowBtnHover  = new Color(1.00f, 0.90f, 0.35f, 1.00f);
        Color yellowBtnPress  = new Color(0.78f, 0.62f, 0.08f, 1.00f);
        Color blackBtnText    = new Color(0.06f, 0.06f, 0.06f, 1.00f);

        // ==========================================
        // 1. КАРТОЧКА МЕНЮ ПАУЗЫ (PauseMenuPanel)
        // ==========================================
        GameObject pausePanel = CreateImage("PauseMenuPanel", canvasGo.transform,
            new Color(0.0f, 0.0f, 0.0f, 0.88f),
            Vector2.zero, Vector2.one, Vector2.zero, Vector2.zero);

        GameObject pauseCard = CreateImage("Pause_Card", pausePanel.transform,
            new Color(0.04f, 0.04f, 0.04f, 0.98f),
            new Vector2(0.5f, 0.5f), new Vector2(0.5f, 0.5f),
            new Vector2(480f, 560f), Vector2.zero);

        Outline cardOutline = pauseCard.AddComponent<Outline>();
        cardOutline.effectColor = new Color(1.00f, 0.85f, 0.10f, 0.55f);
        cardOutline.effectDistance = new Vector2(2f, -2f);

        CreateText("Pause_Title", pauseCard.transform,
            "ПАУЗА",
            34, FontStyle.Bold, TextAnchor.MiddleCenter,
            new Color(1.00f, 0.85f, 0.10f, 1.0f),
            new Vector2(0.05f, 0.86f), new Vector2(0.95f, 0.97f), Vector2.zero, Vector2.zero);

        CreateImage("Pause_Divider", pauseCard.transform,
            new Color(1.00f, 0.85f, 0.10f, 0.40f),
            new Vector2(0.08f, 0.84f), new Vector2(0.92f, 0.845f), Vector2.zero, Vector2.zero);

        GameObject btnContainer = CreateEmptyRect("Buttons_Container", pauseCard.transform,
            new Vector2(0.08f, 0.05f), new Vector2(0.92f, 0.81f), Vector2.zero, Vector2.zero);

        VerticalLayoutGroup vLayout = btnContainer.AddComponent<VerticalLayoutGroup>();
        vLayout.spacing = 16f;
        vLayout.childAlignment = TextAnchor.MiddleCenter;
        vLayout.childControlWidth = true;
        vLayout.childControlHeight = false;
        vLayout.childForceExpandWidth = true;
        vLayout.childForceExpandHeight = false;

        // Кнопки меню паузы
        Button resumeBtn = CreateStyledButton("Btn_Resume", btnContainer.transform,
            "►   ПРОДОЛЖИТЬ",
            yellowBtnNormal, yellowBtnHover, yellowBtnPress, blackBtnText, 62f, 20);

        Button settingsBtn = CreateStyledButton("Btn_Settings", btnContainer.transform,
            "⚙   НАСТРОЙКИ",
            yellowBtnNormal, yellowBtnHover, yellowBtnPress, blackBtnText, 62f, 20);

        Button restartBtn = CreateStyledButton("Btn_Restart", btnContainer.transform,
            "↺   ЗАНОВО",
            yellowBtnNormal, yellowBtnHover, yellowBtnPress, blackBtnText, 62f, 20);

        Button menuBtn = CreateStyledButton("Btn_MainMenu", btnContainer.transform,
            "⌂   ГЛАВНОЕ МЕНЮ",
            yellowBtnNormal, yellowBtnHover, yellowBtnPress, blackBtnText, 62f, 20);

        Button quitBtn = CreateStyledButton("Btn_Quit", btnContainer.transform,
            "✖   ВЫХОД ИЗ ИГРЫ",
            new Color(0.35f, 0.15f, 0.15f, 1.0f),
            new Color(0.50f, 0.20f, 0.20f, 1.0f),
            new Color(0.65f, 0.25f, 0.25f, 1.0f),
            Color.white, 62f, 20);

        // ==========================================
        // 2. ПАНЕЛЬ НАСТРОЕК (SettingsPanel) - ТОЧНО КАК В ГЛАВНОМ МЕНЮ
        // ==========================================
        GameObject settingsPanel = CreateEmptyRect("SettingsPanel", canvasGo.transform,
            Vector2.zero, Vector2.one, Vector2.zero, Vector2.zero);

        CreateImage("Backdrop_Dim", settingsPanel.transform,
            new Color(0.0f, 0.0f, 0.0f, 0.92f),
            Vector2.zero, Vector2.one, Vector2.zero, Vector2.zero);

        GameObject settingsCard = CreateImage("Settings_Card", settingsPanel.transform,
            new Color(0.04f, 0.04f, 0.04f, 0.98f),
            new Vector2(0.5f, 0.5f), new Vector2(0.5f, 0.5f),
            new Vector2(920f, 740f), Vector2.zero);

        Outline panelOutline = settingsCard.AddComponent<Outline>();
        panelOutline.effectColor = new Color(1.00f, 0.85f, 0.10f, 0.55f);
        panelOutline.effectDistance = new Vector2(2f, -2f);

        CreateText("Settings_Header", settingsCard.transform,
            "НАСТРОЙКИ",
            28, FontStyle.Bold, TextAnchor.MiddleCenter,
            new Color(1.00f, 0.85f, 0.10f, 1.0f),
            new Vector2(0.05f, 0.90f), new Vector2(0.95f, 0.98f), Vector2.zero, Vector2.zero);

        CreateImage("Settings_Divider", settingsCard.transform,
            new Color(1.00f, 0.85f, 0.10f, 0.40f),
            new Vector2(0.05f, 0.89f), new Vector2(0.95f, 0.895f), Vector2.zero, Vector2.zero);

        GameObject settingsList = CreateEmptyRect("Settings_List", settingsCard.transform,
            new Vector2(0.06f, 0.14f), new Vector2(0.94f, 0.87f), Vector2.zero, Vector2.zero);

        VerticalLayoutGroup settingsLayout = settingsList.AddComponent<VerticalLayoutGroup>();
        settingsLayout.spacing = 15f;
        settingsLayout.childAlignment = TextAnchor.UpperCenter;
        settingsLayout.childControlWidth = true;
        settingsLayout.childControlHeight = false;
        settingsLayout.childForceExpandWidth = true;
        settingsLayout.childForceExpandHeight = false;

        // --- Раздел: Звук ---
        CreateCategoryHeader("HEADER_AUDIO", settingsList.transform, "— ЗВУК И ЭХОЛОКАЦИЯ —");

        var volumeRow = CreateSliderRow("Row_Volume", settingsList.transform, "Громкость звука", 0f, 1f, 1f, "%");
        Slider volSlider = volumeRow.slider;
        Text volText = volumeRow.valueText;

        Toggle muteToggle = CreateToggleRow("Row_Mute", settingsList.transform, "Отключить звук (Mute)");

        // --- Раздел: Графика ---
        CreateCategoryHeader("HEADER_GRAPHICS", settingsList.transform, "— ГРАФИКА —");

        Dropdown qualityDropdown = CreateDropdownRow("Row_Quality", settingsList.transform, "Качество графики");
        Toggle fullscreenToggle = CreateToggleRow("Row_Fullscreen", settingsList.transform, "Полноэкранный режим");
        Dropdown resolutionDropdown = CreateDropdownRow("Row_Resolution", settingsList.transform, "Разрешение экрана");

        // --- Раздел: Управление ---
        CreateCategoryHeader("HEADER_CONTROLS", settingsList.transform, "— УПРАВЛЕНИЕ —");

        var sensRow = CreateSliderRow("Row_Sensitivity", settingsList.transform, "Чувствительность мыши", 0.2f, 3.0f, 1.0f, "x");
        Slider sensSlider = sensRow.slider;
        Text sensText = sensRow.valueText;

        // Нижняя строка кнопок в панели настроек
        GameObject bottomButtonsRow = CreateEmptyRect("Settings_BottomButtons", settingsCard.transform,
            new Vector2(0.06f, 0.03f), new Vector2(0.94f, 0.12f), Vector2.zero, Vector2.zero);

        HorizontalLayoutGroup bottomLayout = bottomButtonsRow.AddComponent<HorizontalLayoutGroup>();
        bottomLayout.spacing = 30f;
        bottomLayout.childAlignment = TextAnchor.MiddleCenter;
        bottomLayout.childControlWidth = true;
        bottomLayout.childControlHeight = true;
        bottomLayout.childForceExpandWidth = true;
        bottomLayout.childForceExpandHeight = true;

        Button resetBtn = CreateStyledButton("Button_ResetDefaults", bottomButtonsRow.transform,
            "Сброс",
            new Color(0.35f, 0.15f, 0.15f, 1.0f),
            new Color(0.50f, 0.20f, 0.20f, 1.0f),
            new Color(0.65f, 0.25f, 0.25f, 1.0f),
            Color.white,
            50f, 18);

        Button backBtn = CreateStyledButton("Button_Back", bottomButtonsRow.transform,
            "Применить и выйти",
            yellowBtnNormal, yellowBtnHover, yellowBtnPress, blackBtnText,
            50f, 18);

        // ==========================================
        // 3. ПРИВЯЗКА К СИСТЕМЕ PAUSEMENU
        // ==========================================
        pauseMenu.pauseMenuPanel = pausePanel;
        pauseMenu.settingsPanel = settingsPanel;
        pauseMenu.resumeButton = resumeBtn;
        pauseMenu.settingsButton = settingsBtn;
        pauseMenu.restartButton = restartBtn;
        pauseMenu.mainMenuButton = menuBtn;
        pauseMenu.quitButton = quitBtn;
        pauseMenu.backFromSettingsButton = backBtn;
        pauseMenu.resetDefaultsButton = resetBtn;

        // Привязываем обработчики через UnityEvent для отображения в Инспекторе
        UnityEditor.Events.UnityEventTools.AddPersistentListener(resumeBtn.onClick, pauseMenu.ResumeGame);
        UnityEditor.Events.UnityEventTools.AddPersistentListener(settingsBtn.onClick, pauseMenu.OpenSettings);
        UnityEditor.Events.UnityEventTools.AddPersistentListener(restartBtn.onClick, pauseMenu.RestartGame);
        UnityEditor.Events.UnityEventTools.AddPersistentListener(menuBtn.onClick, pauseMenu.ReturnToMainMenu);
        UnityEditor.Events.UnityEventTools.AddPersistentListener(quitBtn.onClick, pauseMenu.QuitGame);
        UnityEditor.Events.UnityEventTools.AddPersistentListener(backBtn.onClick, pauseMenu.CloseSettings);
        UnityEditor.Events.UnityEventTools.AddPersistentListener(resetBtn.onClick, pauseMenu.ResetToDefaults);

        pauseMenu.volumeSlider = volSlider;
        pauseMenu.volumeValueText = volText;
        pauseMenu.muteToggle = muteToggle;
        pauseMenu.qualityDropdown = qualityDropdown;
        pauseMenu.fullscreenToggle = fullscreenToggle;
        pauseMenu.resolutionDropdown = resolutionDropdown;
        pauseMenu.sensitivitySlider = sensSlider;
        pauseMenu.sensitivityValueText = sensText;

        pausePanel.SetActive(false);
        settingsPanel.SetActive(false);

        // Также гарантируем экран смерти
        DeathScreenBuilder.Build();

        EditorSceneManager.MarkSceneDirty(gameplayScene);
        EditorSceneManager.SaveScene(gameplayScene);
        Debug.Log("[PauseMenuBuilder] PauseCanvas в стиле MainMenu успешно создан и сохранен в SampleScene.unity");

        return "SUCCESS: PauseMenu rebuilt with separate Settings panel matching MainMenu style!";
    }

    #region Хелперы UI

    private static GameObject CreateEmptyRect(string name, Transform parent, Vector2 anchorMin, Vector2 anchorMax, Vector2 sizeDelta, Vector2 anchoredPosition)
    {
        GameObject go = new GameObject(name, typeof(RectTransform));
        go.transform.SetParent(parent, false);
        RectTransform rt = go.GetComponent<RectTransform>();
        rt.anchorMin = anchorMin;
        rt.anchorMax = anchorMax;
        rt.sizeDelta = sizeDelta;
        rt.anchoredPosition = anchoredPosition;
        return go;
    }

    private static GameObject CreateImage(string name, Transform parent, Color color, Vector2 anchorMin, Vector2 anchorMax, Vector2 sizeDelta, Vector2 anchoredPosition)
    {
        GameObject go = CreateEmptyRect(name, parent, anchorMin, anchorMax, sizeDelta, anchoredPosition);
        Image img = go.AddComponent<Image>();
        img.color = color;
        return go;
    }

    private static GameObject CreateText(string name, Transform parent, string text, int fontSize, FontStyle style, TextAnchor alignment, Color color, Vector2 anchorMin, Vector2 anchorMax, Vector2 sizeDelta, Vector2 anchoredPosition)
    {
        GameObject go = CreateEmptyRect(name, parent, anchorMin, anchorMax, sizeDelta, anchoredPosition);
        Text t = go.AddComponent<Text>();
        t.font = standardFont;
        t.text = text;
        t.fontSize = fontSize;
        t.fontStyle = style;
        t.alignment = alignment;
        t.color = color;
        t.horizontalOverflow = HorizontalWrapMode.Overflow;
        t.verticalOverflow = VerticalWrapMode.Overflow;
        return go;
    }

    private static Button CreateStyledButton(string name, Transform parent, string label, Color normalColor, Color highlightedColor, Color pressedColor, Color textColor, float height, int fontSize)
    {
        GameObject btnObj = DefaultControls.CreateButton(uiResources);
        btnObj.name = name;
        btnObj.transform.SetParent(parent, false);

        RectTransform rt = btnObj.GetComponent<RectTransform>();
        if (rt != null)
        {
            rt.sizeDelta = new Vector2(rt.sizeDelta.x, height);
        }

        LayoutElement layout = btnObj.AddComponent<LayoutElement>();
        layout.minHeight = height;
        layout.preferredHeight = height;

        Image img = btnObj.GetComponent<Image>();
        img.color = normalColor;
        img.type = Image.Type.Sliced;

        Outline btnOutline = btnObj.AddComponent<Outline>();
        btnOutline.effectColor = new Color(1.00f, 0.95f, 0.60f, 0.65f);
        btnOutline.effectDistance = new Vector2(2f, -2f);

        Shadow btnShadow = btnObj.AddComponent<Shadow>();
        btnShadow.effectColor = new Color(0.00f, 0.00f, 0.00f, 0.50f);
        btnShadow.effectDistance = new Vector2(2f, -2f);

        Button btn = btnObj.GetComponent<Button>();
        ColorBlock colors = btn.colors;
        colors.normalColor = normalColor;
        colors.highlightedColor = highlightedColor;
        colors.pressedColor = pressedColor;
        colors.selectedColor = highlightedColor;
        colors.colorMultiplier = 1f;
        colors.fadeDuration = 0.12f;
        btn.colors = colors;

        Text text = btnObj.GetComponentInChildren<Text>();
        if (text != null)
        {
            text.font = standardFont;
            text.text = label;
            text.fontSize = fontSize;
            text.fontStyle = FontStyle.Bold;
            text.color = textColor;
            text.alignment = TextAnchor.MiddleCenter;
            text.horizontalOverflow = HorizontalWrapMode.Overflow;
            text.verticalOverflow = VerticalWrapMode.Overflow;
        }

        return btn;
    }

    private static void CreateCategoryHeader(string name, Transform parent, string text)
    {
        GameObject go = CreateEmptyRect(name, parent, Vector2.zero, Vector2.one, new Vector2(0f, 32f), Vector2.zero);
        LayoutElement layout = go.AddComponent<LayoutElement>();
        layout.minHeight = 32f;
        layout.preferredHeight = 32f;

        Text t = go.AddComponent<Text>();
        t.font = standardFont;
        t.text = text;
        t.fontSize = 16;
        t.fontStyle = FontStyle.Bold;
        t.alignment = TextAnchor.MiddleLeft;
        t.color = new Color(1.00f, 0.85f, 0.10f, 0.95f);
    }

    private static (Slider slider, Text valueText) CreateSliderRow(string name, Transform parent, string label, float min, float max, float def, string unitSuffix)
    {
        GameObject row = CreateEmptyRect(name, parent, Vector2.zero, Vector2.one, new Vector2(0f, 44f), Vector2.zero);
        LayoutElement layout = row.AddComponent<LayoutElement>();
        layout.minHeight = 44f;
        layout.preferredHeight = 44f;

        CreateText("Label", row.transform, label, 16, FontStyle.Normal, TextAnchor.MiddleLeft,
            new Color(0.92f, 0.92f, 0.92f, 1f), new Vector2(0f, 0f), new Vector2(0.40f, 1f), Vector2.zero, Vector2.zero);

        GameObject sliderObj = DefaultControls.CreateSlider(uiResources);
        sliderObj.name = "Slider";
        sliderObj.transform.SetParent(row.transform, false);
        RectTransform sliderRt = sliderObj.GetComponent<RectTransform>();
        sliderRt.anchorMin = new Vector2(0.42f, 0.20f);
        sliderRt.anchorMax = new Vector2(0.82f, 0.80f);
        sliderRt.offsetMin = Vector2.zero;
        sliderRt.offsetMax = Vector2.zero;

        Slider slider = sliderObj.GetComponent<Slider>();
        slider.minValue = min;
        slider.maxValue = max;
        slider.value = def;

        Transform fill = sliderObj.transform.Find("Fill Area/Fill");
        if (fill != null)
        {
            var img = fill.GetComponent<Image>();
            if (img != null) img.color = new Color(1.00f, 0.85f, 0.10f, 1f);
        }

        GameObject valueTextObj = CreateText("ValueText", row.transform,
            unitSuffix == "%" ? $"{Mathf.RoundToInt(def * 100)}%" : $"{def:F1}{unitSuffix}",
            15, FontStyle.Bold, TextAnchor.MiddleRight,
            new Color(1.00f, 0.85f, 0.10f, 1f), new Vector2(0.84f, 0f), new Vector2(1f, 1f), Vector2.zero, Vector2.zero);

        return (slider, valueTextObj.GetComponent<Text>());
    }

    private static Toggle CreateToggleRow(string name, Transform parent, string label)
    {
        GameObject row = CreateEmptyRect(name, parent, Vector2.zero, Vector2.one, new Vector2(0f, 40f), Vector2.zero);
        LayoutElement layout = row.AddComponent<LayoutElement>();
        layout.minHeight = 40f;
        layout.preferredHeight = 40f;

        CreateText("Label", row.transform, label, 16, FontStyle.Normal, TextAnchor.MiddleLeft,
            new Color(0.92f, 0.92f, 0.92f, 1f), new Vector2(0f, 0f), new Vector2(0.70f, 1f), Vector2.zero, Vector2.zero);

        GameObject toggleObj = DefaultControls.CreateToggle(uiResources);
        toggleObj.name = "Toggle";
        toggleObj.transform.SetParent(row.transform, false);
        RectTransform rt = toggleObj.GetComponent<RectTransform>();
        rt.anchorMin = new Vector2(0.85f, 0.15f);
        rt.anchorMax = new Vector2(1f, 0.85f);
        rt.offsetMin = Vector2.zero;
        rt.offsetMax = Vector2.zero;

        Text defaultLabel = toggleObj.GetComponentInChildren<Text>();
        if (defaultLabel != null) Object.DestroyImmediate(defaultLabel.gameObject);

        return toggleObj.GetComponent<Toggle>();
    }

    private static Dropdown CreateDropdownRow(string name, Transform parent, string label)
    {
        GameObject row = CreateEmptyRect(name, parent, Vector2.zero, Vector2.one, new Vector2(0f, 44f), Vector2.zero);
        LayoutElement layout = row.AddComponent<LayoutElement>();
        layout.minHeight = 44f;
        layout.preferredHeight = 44f;

        CreateText("Label", row.transform, label, 16, FontStyle.Normal, TextAnchor.MiddleLeft,
            new Color(0.92f, 0.92f, 0.92f, 1f), new Vector2(0f, 0f), new Vector2(0.40f, 1f), Vector2.zero, Vector2.zero);

        GameObject ddObj = DefaultControls.CreateDropdown(uiResources);
        ddObj.name = "Dropdown";
        ddObj.transform.SetParent(row.transform, false);
        RectTransform rt = ddObj.GetComponent<RectTransform>();
        rt.anchorMin = new Vector2(0.42f, 0.10f);
        rt.anchorMax = new Vector2(1f, 0.90f);
        rt.offsetMin = Vector2.zero;
        rt.offsetMax = Vector2.zero;

        Image img = ddObj.GetComponent<Image>();
        if (img != null) img.color = new Color(0.12f, 0.12f, 0.12f, 1f);

        return ddObj.GetComponent<Dropdown>();
    }

    #endregion
}