using System.Buffers.Text;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class SettingsScreen : MonoBehaviour
{
    [Header("Ссылки")]
    [SerializeField] private SettingGroup GroupPrefab;

    private bool Generated = false;
    private int activeSetting;

    private List<BaseSettingView> settings;

    [SerializeField] RectTransform testPointer;
    [SerializeField] ScrollRect scrollRect;


    //====================
    [Header("Управление")]
    [SerializeField] private Axis switchAxis = Axis.Vertical;
    [SerializeField] private Axis interactAxis = Axis.Horizontal;
    [SerializeField] private PlayerAction intractButton = PlayerAction.action;

    [SerializeField] private RectTransform Content;

    private void Start()
    {
        Generate();
    }

    private void Update()
    {
        int switchDirection = -In.GetAxis(switchAxis, JoystickSide.Both);
        
        activeSetting = (activeSetting + switchDirection + settings.Count) % settings.Count;

        var activePivot = settings[activeSetting].pivotPoint;
        ScrollToElementVertical(activePivot);
        testPointer.position = activePivot.position;

        int interactDirection = In.GetAxis(interactAxis, JoystickSide.Both, InteractMode.Continious);
        settings[activeSetting].TakeInput(interactDirection, false);
    }

    public void Generate()
    {
        ClearContent();
        settings = new List<BaseSettingView>();

        foreach (var group in SettingsManager.currentSchemeDTO.groups)
            settings.AddRange(GenerateGroup(group).settings);

        activeSetting = 0;
        Generated = true;
    }

    private SettingGroup GenerateGroup(SettingsGroupDTO groupData)
    {
        var group = Instantiate(GroupPrefab, Content);
        group.Configure(groupData);
        return group;
    }

    private void ClearContent()
    {
        for (int i = Content.childCount - 1; i >= 0; i--)
            Destroy(Content.GetChild(i).gameObject);
    }

    public void ScrollToElementVertical(RectTransform targetRect)
    {
        if (scrollRect == null || targetRect == null)
        {
            Debug.LogWarning("ScrollRect или Target не назначены");
            return;
        }

        LayoutRebuilder.ForceRebuildLayoutImmediate(scrollRect.content);
        
        RectTransform viewport = scrollRect.viewport;
        RectTransform content = scrollRect.content;

        if (viewport == null || content == null)
        {
            Debug.LogWarning("Viewport или Content не назначены");
            return;
        }

        Vector2 targetLocalPos = content.InverseTransformPoint(targetRect.position);
        Vector2 viewportLocalPos = content.InverseTransformPoint(viewport.position);

        float targetHeight = targetRect.rect.height;
        float viewportHeight = viewport.rect.height;
        float contentHeight = content.rect.height;

        if (contentHeight <= viewportHeight)
        {
            scrollRect.verticalNormalizedPosition = 1f;
            return;
        }

        float offsetY = (targetLocalPos.y - viewportLocalPos.y) * -1f;

        float targetCenterY = offsetY + targetHeight * 0.5f;
        float viewportCenterY = viewportHeight * 0.5f;

        float deltaY = (targetCenterY - viewportCenterY) / (contentHeight - viewportHeight);

        float newPosition = Mathf.Clamp01(scrollRect.verticalNormalizedPosition - deltaY);

        scrollRect.verticalNormalizedPosition = newPosition;
    }

}