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

public class PauseUILoadoutHelper : MonoBehaviour
{
	public ThronefallUIElement topmostButton;

	public ThronefallUIElement botmostButton;

	public GridLayoutGroup loadoutGroup;

	public TFUIEquippable equippableButtonPrefab;

	private List<TFUIEquippable> grid = new List<TFUIEquippable>();

	private const int maxRows = 4;

	public void Refresh()
	{
		if (SceneTransitionManager.instance.CurrentSceneState != SceneTransitionManager.SceneState.InGame)
		{
			return;
		}
		grid.Clear();
		foreach (Transform item in loadoutGroup.transform)
		{
			Object.Destroy(item.gameObject);
		}
		List<Equippable> list = new List<Equippable>();
		List<Equippable> list2 = new List<Equippable>();
		List<Equippable> list3 = new List<Equippable>();
		foreach (Equippable item2 in PerkManager.instance.CurrentlyEquipped)
		{
			if (item2 is EquippableWeapon)
			{
				list.Add(item2);
			}
			else if (item2 is EquippablePerk)
			{
				list2.Add(item2);
			}
			else if (item2 is EquippableMutation)
			{
				list3.Add(item2);
			}
		}
		foreach (Equippable item3 in list)
		{
			AddTFUIEquippable(loadoutGroup, item3);
		}
		foreach (Equippable item4 in list2)
		{
			AddTFUIEquippable(loadoutGroup, item4);
		}
		foreach (Equippable item5 in list3)
		{
			AddTFUIEquippable(loadoutGroup, item5);
		}
		AssignNavigationTargets();
	}

	private void AddTFUIEquippable(GridLayoutGroup parent, Equippable e)
	{
		TFUIEquippable component = Object.Instantiate(equippableButtonPrefab, parent.transform).GetComponent<TFUIEquippable>();
		component.SetDataSimple(e);
		grid.Add(component);
	}

	private void AssignNavigationTargets()
	{
		int num = grid.Count / 4;
		int num2 = grid.Count % 4;
		if (num2 > 0)
		{
			num++;
		}
		else
		{
			num2 = 4;
		}
		int num3 = 0;
		int num4 = 0;
		for (int i = 0; i < grid.Count; i++)
		{
			ThronefallUIElement thronefallUIElement = grid[i];
			if (num3 == 0)
			{
				thronefallUIElement.topNav = botmostButton;
			}
			else
			{
				thronefallUIElement.topNav = grid[i - 1];
			}
			if (num3 == 3 || (num == 1 && i == grid.Count - 1))
			{
				thronefallUIElement.botNav = topmostButton;
			}
			else if (num > 1 && i == grid.Count - 1)
			{
				thronefallUIElement.botNav = grid[4 * num4 - 1];
			}
			else
			{
				thronefallUIElement.botNav = grid[i + 1];
			}
			if (num > 1)
			{
				if (num4 == 0)
				{
					if (num3 <= num2 - 1)
					{
						thronefallUIElement.leftNav = grid[grid.Count - (num2 - num3)];
					}
					else if (i + 4 <= grid.Count - 1)
					{
						thronefallUIElement.leftNav = grid[i + 4];
					}
				}
				else
				{
					thronefallUIElement.leftNav = grid[i - 4];
				}
				if (num4 == num - 1)
				{
					thronefallUIElement.rightNav = grid[i - 4 * (num - 1)];
				}
				else
				{
					int num5 = i + 4;
					if (num5 <= grid.Count - 1)
					{
						thronefallUIElement.rightNav = grid[num5];
					}
					else
					{
						thronefallUIElement.rightNav = grid[i - 4 * num4];
					}
				}
			}
			num3++;
			if (num3 > 3)
			{
				num3 = 0;
				num4++;
			}
		}
		if (grid.Count > 0)
		{
			botmostButton.botNav = grid[0];
			if (num2 != 4 && num > 1)
			{
				topmostButton.topNav = grid[4 * (num - 1) - 1];
			}
			else
			{
				topmostButton.topNav = grid[grid.Count - 1];
			}
		}
	}
}