using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;
using TMPro;

[System.Serializable]
public class ModData
{
    public Sprite modSprite;
    public string sceneName;
}

public class ModSelectManager : MonoBehaviour
{
    [Header("━━━ MODLAR ━━━━━━━━━━━━━━━━━━━━━━━━━━━━")]
    public ModData[] mods;

    [Header("━━━ KART BOYUTLARI ━━━━━━━━━━━━━━━━━━━━")]
    public float cardWidth = 900f;
    public float cardHeight = 500f;
    public float spacing = 40f;

    [Header("━━━ PLAY BUTTON ━━━━━━━━━━━━━━━━━━━━━━━")]
    public string playButtonText = "PLAY";
    public float playButtonWidth = 400f;
    public float playButtonHeight = 100f;

    void Start()
    {
        Canvas canvas = FindAnyObjectByType<Canvas>();

        if (canvas == null)
        {
            GameObject canvasObj = new GameObject("Canvas");
            canvas = canvasObj.AddComponent<Canvas>();
            canvas.renderMode = RenderMode.ScreenSpaceOverlay;

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

            canvasObj.AddComponent<GraphicRaycaster>();
        }

        GameObject oldScroll = GameObject.Find("ModScrollView");

        if (oldScroll != null)
            Destroy(oldScroll);

        GameObject scrollObj = new GameObject("ModScrollView");
        scrollObj.transform.SetParent(canvas.transform, false);

        RectTransform scrollRect = scrollObj.AddComponent<RectTransform>();
        scrollRect.anchorMin = Vector2.zero;
        scrollRect.anchorMax = Vector2.one;
        scrollRect.offsetMin = Vector2.zero;
        scrollRect.offsetMax = Vector2.zero;

        ScrollRect scroll = scrollObj.AddComponent<ScrollRect>();
        scroll.horizontal = false;
        scroll.vertical = true;
        scroll.movementType = ScrollRect.MovementType.Elastic;
        scroll.elasticity = 0.12f;
        scroll.inertia = true;
        scroll.decelerationRate = 0.135f;
        scroll.scrollSensitivity = 30f;

        GameObject viewportObj = new GameObject("Viewport");
        viewportObj.transform.SetParent(scrollObj.transform, false);

        RectTransform viewportRect = viewportObj.AddComponent<RectTransform>();
        viewportRect.anchorMin = Vector2.zero;
        viewportRect.anchorMax = Vector2.one;
        viewportRect.offsetMin = Vector2.zero;
        viewportRect.offsetMax = Vector2.zero;

        Image viewportImage = viewportObj.AddComponent<Image>();
        viewportImage.color = new Color(0f, 0f, 0f, 0f);

        Mask mask = viewportObj.AddComponent<Mask>();
        mask.showMaskGraphic = false;

        GameObject contentObj = new GameObject("Content");
        contentObj.transform.SetParent(viewportObj.transform, false);

        RectTransform contentRect = contentObj.AddComponent<RectTransform>();
        contentRect.anchorMin = new Vector2(0f, 1f);
        contentRect.anchorMax = new Vector2(1f, 1f);
        contentRect.pivot = new Vector2(0.5f, 1f);
        contentRect.anchoredPosition = Vector2.zero;
        contentRect.sizeDelta = Vector2.zero;

        VerticalLayoutGroup vlg = contentObj.AddComponent<VerticalLayoutGroup>();
        vlg.spacing = spacing;
        vlg.padding = new RectOffset(50, 50, 50, 50);
        vlg.childAlignment = TextAnchor.UpperCenter;
        vlg.childControlWidth = false;
        vlg.childControlHeight = false;
        vlg.childForceExpandWidth = false;
        vlg.childForceExpandHeight = false;

        ContentSizeFitter csf = contentObj.AddComponent<ContentSizeFitter>();
        csf.verticalFit = ContentSizeFitter.FitMode.PreferredSize;
        csf.horizontalFit = ContentSizeFitter.FitMode.Unconstrained;

        scroll.viewport = viewportRect;
        scroll.content = contentRect;

        if (mods == null || mods.Length == 0)
        {
            Debug.LogWarning("ModSelectManager: mods listesi boş.");
            return;
        }

        foreach (ModData mod in mods)
        {
            if (mod == null)
                continue;

            GameObject card = new GameObject("ModCard");
            card.transform.SetParent(contentObj.transform, false);

            RectTransform cardRect = card.AddComponent<RectTransform>();
            cardRect.sizeDelta = new Vector2(cardWidth, cardHeight);

            LayoutElement cardLayout = card.AddComponent<LayoutElement>();
            cardLayout.preferredWidth = cardWidth;
            cardLayout.preferredHeight = cardHeight;
            cardLayout.minWidth = cardWidth;
            cardLayout.minHeight = cardHeight;
            cardLayout.flexibleWidth = 0f;
            cardLayout.flexibleHeight = 0f;

            Image cardImg = card.AddComponent<Image>();
            cardImg.color = new Color(0.1f, 0.1f, 0.2f, 1f);

            GameObject imgObj = new GameObject("ModImage");
            imgObj.transform.SetParent(card.transform, false);

            RectTransform imgRect = imgObj.AddComponent<RectTransform>();
            imgRect.anchorMin = Vector2.zero;
            imgRect.anchorMax = Vector2.one;
            imgRect.offsetMin = new Vector2(0f, 120f);
            imgRect.offsetMax = Vector2.zero;

            Image modImg = imgObj.AddComponent<Image>();

            if (mod.modSprite != null)
                modImg.sprite = mod.modSprite;

            modImg.preserveAspect = true;
            modImg.raycastTarget = false;

            GameObject btnObj = new GameObject("PlayButton");
            btnObj.transform.SetParent(card.transform, false);

            RectTransform btnRect = btnObj.AddComponent<RectTransform>();
            btnRect.anchorMin = new Vector2(0.5f, 0f);
            btnRect.anchorMax = new Vector2(0.5f, 0f);
            btnRect.pivot = new Vector2(0.5f, 0f);
            btnRect.sizeDelta = new Vector2(playButtonWidth, playButtonHeight);
            btnRect.anchoredPosition = new Vector2(0f, 10f);

            Image btnImg = btnObj.AddComponent<Image>();
            btnImg.color = new Color(0.1f, 0.7f, 0.2f, 1f);

            Button btn = btnObj.AddComponent<Button>();

            GameObject txtObj = new GameObject("Text");
            txtObj.transform.SetParent(btnObj.transform, false);

            RectTransform txtRect = txtObj.AddComponent<RectTransform>();
            txtRect.anchorMin = Vector2.zero;
            txtRect.anchorMax = Vector2.one;
            txtRect.offsetMin = Vector2.zero;
            txtRect.offsetMax = Vector2.zero;

            TextMeshProUGUI tmp = txtObj.AddComponent<TextMeshProUGUI>();
            tmp.text = playButtonText;
            tmp.fontSize = 50f;
            tmp.alignment = TextAlignmentOptions.Center;
            tmp.color = Color.white;
            tmp.raycastTarget = false;

            string sceneName = mod.sceneName;

            btn.onClick.RemoveAllListeners();
            btn.onClick.AddListener(() =>
            {
                if (string.IsNullOrWhiteSpace(sceneName))
                {
                    Debug.LogWarning("ModSelectManager: sceneName boş.");
                    return;
                }

                SceneManager.LoadScene(sceneName);
            });
        }
    }
}