using System;
using System.Collections.Generic;
using System.Linq;
using Steamworks;
using UnityEngine;

public class DLCManager : MonoBehaviour
{
	[Serializable]
	public class DLCContent
	{
		[Tooltip("DLC ID obtained from Steam")]
		public AppId_t appId;

		[Header("Levels included in this DLC")]
		public int[] mapIds;

		[NonSerialized]
		public bool licenseOwned;

		[NonSerialized]
		public int iDLC;

		[NonSerialized]
		public bool available;

		[NonSerialized]
		public string name;
	}

	private static DLCManager instance;

	public List<DLCContent> dlcContents;

	[Header("Debugging")]
	public bool forceTrue_LicenseOwned;

	public bool forceTrue_Available;

	public static DLCManager Instance => instance;

	public bool Initialized { get; private set; }

	public static event Action OnUpdateDLCContents;

	public DLCContent GetDLCContent(string nameDLC)
	{
		return dlcContents.FirstOrDefault((DLCContent element) => element.name == nameDLC);
	}

	public DLCContent GetDLCContent(AppId_t appId)
	{
		return dlcContents.FirstOrDefault((DLCContent element) => element.appId == appId);
	}

	public void Refresh()
	{
		UpdateDLCContents();
	}

	public DLCContent GetNewestLockedDLC()
	{
		DLCContent result = null;
		for (int num = dlcContents.Count - 1; num >= 0; num--)
		{
			DLCContent dLCContent = dlcContents[num];
			if (!DebugLicense(dLCContent) && DebugAvailable(dLCContent))
			{
				result = dLCContent;
				break;
			}
		}
		return result;
	}

	public bool IsDLCUnlocked(AppId_t id)
	{
		bool result = false;
		if (Initialized)
		{
			DLCContent dLCContent = dlcContents.Find((DLCContent element) => element.appId == id);
			if (dLCContent != null && DebugLicense(dLCContent))
			{
				result = true;
			}
		}
		return result;
	}

	public bool IsDLCUnlocked(string name)
	{
		bool result = false;
		DLCContent dLCContent = dlcContents.Find((DLCContent element) => element.name == name);
		if (dLCContent != null)
		{
			result = IsDLCUnlocked(dLCContent.appId);
		}
		return result;
	}

	public bool IsLevelUnlocked(int mapID, out string nameDLC)
	{
		bool result = false;
		nameDLC = null;
		if (!IsLevelInAnyDLC(mapID))
		{
			result = true;
		}
		else if (Initialized)
		{
			DLCContent dLCContent = dlcContents.Find((DLCContent element) => element.mapIds.Contains(mapID));
			if (DebugLicense(dLCContent))
			{
				result = true;
			}
			nameDLC = dLCContent.name;
		}
		return result;
	}

	public bool IsLevelInAnyDLC(int mapID)
	{
		return dlcContents.Exists((DLCContent element) => element.mapIds.Contains(mapID));
	}

	private void Awake()
	{
		UnityEngine.Object.DontDestroyOnLoad(this);
		if (instance == null)
		{
			instance = this;
		}
		else if (instance != this)
		{
			UnityEngine.Object.Destroy(base.gameObject);
		}
	}

	private void FixedUpdate()
	{
		if (!Initialized && SteamManager.Initialized)
		{
			Initialized = true;
			UpdateDLCContents();
		}
	}

	private void UpdateDLCContents()
	{
		List<DLCContent> list = new List<DLCContent>();
		int dLCCount = SteamApps.GetDLCCount();
		for (int i = 0; i < dLCCount; i++)
		{
			if (SteamApps.BGetDLCDataByIndex(i, out var pAppID, out var pbAvailable, out var pchName, 128))
			{
				list.Add(new DLCContent
				{
					appId = pAppID,
					iDLC = i,
					available = pbAvailable,
					name = pchName
				});
			}
		}
		for (int j = 0; j < dlcContents.Count; j++)
		{
			DLCContent dlcContent = dlcContents[j];
			DLCContent dLCContent = list.Find((DLCContent element) => element.appId == dlcContent.appId);
			if (dLCContent != null)
			{
				dlcContent.licenseOwned = SteamApps.BIsDlcInstalled(dlcContent.appId);
				dlcContent.iDLC = dLCContent.iDLC;
				dlcContent.available = dLCContent.available;
				dlcContent.name = dLCContent.name;
			}
			else
			{
				dlcContent.licenseOwned = false;
				dlcContent.iDLC = -1;
				dlcContent.available = false;
				dlcContent.name = "[DLC Name]";
			}
		}
		DLCManager.OnUpdateDLCContents?.Invoke();
	}

	private bool DebugLicense(DLCContent dlcContent)
	{
		return SteamApps.BIsDlcInstalled(dlcContent.appId);
	}

	private bool DebugAvailable(DLCContent dlcContent)
	{
		return dlcContent.available;
	}
}