using UnityEngine;
using UnityEditor;
using UnityEngine.UI;
using UnityEngine.EventSystems;

public static class SetupHealthBarHUD
{
    [MenuItem("Tools/Setup Health Bar HUD")]
    public static void Setup()
    {
        var existingCanvas = GameObject.Find("HUD_Canvas");
        if (existingCanvas != null)
        {
            Object.DestroyImmediate(existingCanvas);
        }

        // Canvas
        GameObject canvasGo = new GameObject("HUD_Canvas");
        Canvas canvas = canvasGo.AddComponent<Canvas>();
        canvas.renderMode = RenderMode.ScreenSpaceOverlay;
        
        CanvasScaler scaler = canvasGo.AddComponent<CanvasScaler>();
        scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
        scaler.referenceResolution = new Vector2(1920, 1080);
        scaler.matchWidthOrHeight = 0.5f;

        canvasGo.AddComponent<GraphicRaycaster>();

        // EventSystem
        if (Object.FindAnyObjectByType<EventSystem>() == null)
        {
            GameObject esGo = new GameObject("EventSystem");
            esGo.AddComponent<EventSystem>();
            esGo.AddComponent<UnityEngine.InputSystem.UI.InputSystemUIInputModule>();
            Undo.RegisterCreatedObjectUndo(esGo, "Create EventSystem");
        }

        // HealthBar Root Container (Top-Right)
        GameObject hbContainer = new GameObject("HealthBar", typeof(RectTransform));
        hbContainer.transform.SetParent(canvasGo.transform, false);
        RectTransform hbRect = hbContainer.GetComponent<RectTransform>();
        hbRect.anchorMin = new Vector2(1f, 1f);
        hbRect.anchorMax = new Vector2(1f, 1f);
        hbRect.pivot = new Vector2(1f, 1f);
        hbRect.anchoredPosition = new Vector2(-40f, -40f);
        hbRect.sizeDelta = new Vector2(280f, 36f);

        // Background
        GameObject bgGo = new GameObject("Background", typeof(RectTransform), typeof(Image));
        bgGo.transform.SetParent(hbContainer.transform, false);
        RectTransform bgRect = bgGo.GetComponent<RectTransform>();
        bgRect.anchorMin = Vector2.zero;
        bgRect.anchorMax = Vector2.one;
        bgRect.offsetMin = Vector2.zero;
        bgRect.offsetMax = Vector2.zero;
        Image bgImg = bgGo.GetComponent<Image>();
        bgImg.color = new Color(0.08f, 0.08f, 0.08f, 0.85f);

        // Health Fill (Filled Image)
        GameObject fillGo = new GameObject("HealthFill", typeof(RectTransform), typeof(Image));
        fillGo.transform.SetParent(hbContainer.transform, false);
        RectTransform fillRect = fillGo.GetComponent<RectTransform>();
        fillRect.anchorMin = Vector2.zero;
        fillRect.anchorMax = Vector2.one;
        fillRect.offsetMin = new Vector2(4f, 4f);
        fillRect.offsetMax = new Vector2(-4f, -4f);
        Image fillImg = fillGo.GetComponent<Image>();
        fillImg.type = Image.Type.Filled;
        fillImg.fillMethod = Image.FillMethod.Horizontal;
        fillImg.fillOrigin = (int)Image.OriginHorizontal.Left;
        fillImg.fillAmount = 1f;
        fillImg.color = new Color(0.2f, 0.85f, 0.3f, 1f);

        // Text (Current / Max HP)
        GameObject textGo = new GameObject("Text_HP", typeof(RectTransform), typeof(Text));
        textGo.transform.SetParent(hbContainer.transform, false);
        RectTransform textRect = textGo.GetComponent<RectTransform>();
        textRect.anchorMin = Vector2.zero;
        textRect.anchorMax = Vector2.one;
        textRect.offsetMin = Vector2.zero;
        textRect.offsetMax = Vector2.zero;
        Text hpText = textGo.GetComponent<Text>();
        hpText.text = "100 / 100";
        hpText.alignment = TextAnchor.MiddleCenter;
        hpText.fontSize = 20;
        hpText.fontStyle = FontStyle.Bold;
        hpText.color = Color.white;
        Font defaultFont = Resources.GetBuiltinResource<Font>("LegacyRuntime.ttf");
        if (defaultFont == null) defaultFont = Resources.GetBuiltinResource<Font>("Arial.ttf");
        hpText.font = defaultFont;

        // PlayerHealthUI
        PlayerHealthUI uiComp = hbContainer.AddComponent<PlayerHealthUI>();
        uiComp.healthFillImage = fillImg;
        uiComp.healthText = hpText;
        uiComp.playerHealth = Object.FindAnyObjectByType<PlayerHealth>();

        // Crosshair / Center Cursor (Center of Screen)
        GameObject crosshairGo = new GameObject("Crosshair", typeof(RectTransform));
        crosshairGo.transform.SetParent(canvasGo.transform, false);
        RectTransform crosshairRect = crosshairGo.GetComponent<RectTransform>();
        crosshairRect.anchorMin = new Vector2(0.5f, 0.5f);
        crosshairRect.anchorMax = new Vector2(0.5f, 0.5f);
        crosshairRect.pivot = new Vector2(0.5f, 0.5f);
        crosshairRect.anchoredPosition = Vector2.zero;
        crosshairRect.sizeDelta = new Vector2(8f, 8f);

        // Outline
        GameObject chOutlineGo = new GameObject("Outline", typeof(RectTransform), typeof(Image));
        chOutlineGo.transform.SetParent(crosshairGo.transform, false);
        RectTransform chOutlineRect = chOutlineGo.GetComponent<RectTransform>();
        chOutlineRect.anchorMin = Vector2.zero;
        chOutlineRect.anchorMax = Vector2.one;
        chOutlineRect.offsetMin = new Vector2(-1f, -1f);
        chOutlineRect.offsetMax = new Vector2(1f, 1f);
        Image chOutlineImg = chOutlineGo.GetComponent<Image>();
        chOutlineImg.color = new Color(0f, 0f, 0f, 0.7f);

        // Center Dot
        GameObject chDotGo = new GameObject("Dot", typeof(RectTransform), typeof(Image));
        chDotGo.transform.SetParent(crosshairGo.transform, false);
        RectTransform chDotRect = chDotGo.GetComponent<RectTransform>();
        chDotRect.anchorMin = Vector2.zero;
        chDotRect.anchorMax = Vector2.one;
        chDotRect.offsetMin = Vector2.zero;
        chDotRect.offsetMax = Vector2.zero;
        Image chDotImg = chDotGo.GetComponent<Image>();
        chDotImg.color = new Color(1f, 1f, 1f, 0.95f);

        // CrosshairUI component
        CrosshairUI chScript = crosshairGo.AddComponent<CrosshairUI>();
        chScript.dotImage = chDotImg;
        chScript.outlineImage = chOutlineImg;

        Undo.RegisterCreatedObjectUndo(canvasGo, "Create HUD_Canvas with HealthBar and Crosshair");
        UnityEditor.SceneManagement.EditorSceneManager.MarkSceneDirty(canvasGo.scene);

        Debug.Log("HUD HealthBar и прицел в центре экрана успешно созданы!");
    }
}