using UnityEngine;
using UnityEngine.UI;
using UnityEditor;
using TMPro;


public class MainMenuSkeletonBuilder : EditorWindow
{
    [MenuItem("Tools/Build Main Menu Skeleton")]
    public static void Build()
    {
        // ---------- CANVAS ----------
        GameObject canvasGO = new GameObject("MainMenu_Canvas", typeof(Canvas), typeof(CanvasScaler), typeof(GraphicRaycaster));
        Canvas canvas = canvasGO.GetComponent<Canvas>();
        canvas.renderMode = RenderMode.ScreenSpaceOverlay;

        CanvasScaler scaler = canvasGO.GetComponent<CanvasScaler>();
        scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
        scaler.referenceResolution = new Vector2(1080, 1920);
        scaler.matchWidthOrHeight = 0.5f;

        if (Object.FindAnyObjectByType<UnityEngine.EventSystems.EventSystem>() == null)
        {
            new GameObject("EventSystem",
                typeof(UnityEngine.EventSystems.EventSystem),
                typeof(UnityEngine.EventSystems.StandaloneInputModule));
        }

        RectTransform canvasRect = canvasGO.GetComponent<RectTransform>();

        // ---------- ФОН ----------
        RectTransform background = CreatePanel(canvasRect, "Background", new Color(0.12f, 0.15f, 0.13f));
        AnchorFillWithOffset(background, Vector4.zero);

        // Лёгкое затемнение снизу, чтобы кнопки читались на любом фоне (частый приём в таких меню)
        RectTransform bottomShade = CreatePanel(canvasRect, "BottomShade", new Color(0f, 0f, 0f, 0.35f));
        AnchorBottomStretch(bottomShade, height: 900);

        // ---------- ЛОГОТИП / НАЗВАНИЕ ----------
        RectTransform logoBG = CreatePanel(canvasRect, "LogoPlaceholder", new Color(0.2f, 0.18f, 0.12f, 0.9f));
        AnchorTopCenter(logoBG, new Vector2(700, 220), new Vector2(0, -180));
        CreateText(logoBG, "TitleText", "НАЗВАНИЕ ИГРЫ", 42);

        // ---------- КНОПКИ (вертикальный стек, снизу) ----------
        string[] buttonNames = { "PlayButton", "SettingsButton", "ExitButton" };
        string[] buttonLabels = { "ИГРАТЬ", "НАСТРОЙКИ", "ВЫХОД" };
        Color[] buttonColors = {
            new Color(0.15f, 0.45f, 0.2f),   // играть -- выделенная, самая заметная
            new Color(0.2f, 0.2f, 0.22f),    // настройки -- нейтральная
            new Color(0.35f, 0.15f, 0.15f)   // выход -- приглушённо-тревожная
        };
        float[] buttonHeights = { 140, 110, 110 };

        float currentY = 480; // отступ снизу для первой (нижней) кнопки
        // Идём снизу вверх: Выход внизу всего, Играть -- выше всех (частый паттерн: главное действие ближе к центру)
        for (int i = buttonNames.Length - 1; i >= 0; i--)
        {
            RectTransform btn = CreateButton(canvasRect, buttonNames[i], buttonLabels[i], buttonColors[i]);
            AnchorBottomCenter(btn, new Vector2(650, buttonHeights[i]), new Vector2(0, currentY));
            GetText(btn).fontSize = (buttonNames[i] == "PlayButton") ? 36 : 26;
            currentY += buttonHeights[i] + 30;
        }

        // ---------- ВЕРСИЯ ИГРЫ (мелкий текст в углу, обычно нужен для отладки/поддержки) ----------
        RectTransform versionText = CreateText(canvasRect, "VersionLabel", "v0.0.1", 18);
        AnchorBottomRightSmall(versionText);

        Selection.activeGameObject = canvasGO;
        Debug.Log("Скелет главного меню создан: Background, LogoPlaceholder, PlayButton, SettingsButton, ExitButton.");
    }

    // ---------------- HELPERS ----------------

    static RectTransform CreatePanel(RectTransform parent, string name, Color color)
    {
        GameObject go = new GameObject(name, typeof(RectTransform), typeof(Image));
        go.transform.SetParent(parent, false);
        go.GetComponent<Image>().color = color;
        return go.GetComponent<RectTransform>();
    }

    static RectTransform CreateText(RectTransform parent, string name, string content, int fontSize)
    {
        GameObject go = new GameObject(name, typeof(RectTransform), typeof(TextMeshProUGUI));
        go.transform.SetParent(parent, false);
        TextMeshProUGUI tmp = go.GetComponent<TextMeshProUGUI>();
        tmp.text = content;
        tmp.fontSize = fontSize;
        tmp.color = Color.white;
        tmp.alignment = TextAlignmentOptions.Center;
        RectTransform rt = go.GetComponent<RectTransform>();
        rt.anchorMin = new Vector2(0, 0);
        rt.anchorMax = new Vector2(1, 1);
        rt.offsetMin = Vector2.zero;
        rt.offsetMax = Vector2.zero;
        return rt;
    }

    static TextMeshProUGUI GetText(RectTransform parent)
    {
        return parent.GetComponentInChildren<TextMeshProUGUI>();
    }

    static RectTransform CreateButton(RectTransform parent, string name, string label, Color color)
    {
        GameObject go = new GameObject(name, typeof(RectTransform), typeof(Image), typeof(Button));
        go.transform.SetParent(parent, false);
        go.GetComponent<Image>().color = color;
        RectTransform rt = go.GetComponent<RectTransform>();
        CreateText(rt, "Label", label, 28);
        return rt;
    }

    static void AnchorFillWithOffset(RectTransform rt, Vector4 leftTopRightBottom)
    {
        rt.anchorMin = new Vector2(0, 0);
        rt.anchorMax = new Vector2(1, 1);
        rt.offsetMin = new Vector2(leftTopRightBottom.x, leftTopRightBottom.w);
        rt.offsetMax = new Vector2(-leftTopRightBottom.z, -leftTopRightBottom.y);
    }

    static void AnchorBottomStretch(RectTransform rt, float height)
    {
        rt.anchorMin = new Vector2(0, 0);
        rt.anchorMax = new Vector2(1, 0);
        rt.pivot = new Vector2(0.5f, 0);
        rt.sizeDelta = new Vector2(0, height);
        rt.anchoredPosition = Vector2.zero;
    }

    static void AnchorTopCenter(RectTransform rt, Vector2 size, Vector2 pos)
    {
        rt.anchorMin = new Vector2(0.5f, 1);
        rt.anchorMax = new Vector2(0.5f, 1);
        rt.pivot = new Vector2(0.5f, 1);
        rt.sizeDelta = size;
        rt.anchoredPosition = pos;
    }

    static void AnchorBottomCenter(RectTransform rt, Vector2 size, Vector2 pos)
    {
        rt.anchorMin = new Vector2(0.5f, 0);
        rt.anchorMax = new Vector2(0.5f, 0);
        rt.pivot = new Vector2(0.5f, 0);
        rt.sizeDelta = size;
        rt.anchoredPosition = pos;
    }

    static void AnchorBottomRightSmall(RectTransform rt)
    {
        rt.anchorMin = new Vector2(1, 0);
        rt.anchorMax = new Vector2(1, 0);
        rt.pivot = new Vector2(1, 0);
        rt.sizeDelta = new Vector2(150, 40);
        rt.anchoredPosition = new Vector2(-20, 20);
    }
}