using System.IO;
using System.Reflection;

namespace BepInEx
{
	/// <summary>
	///     Paths used by BepInEx
	/// </summary>
	public static class Paths
	{
		internal static void SetExecutablePath(string executablePath, string bepinRootPath = null, string managedPath = null, string pluginPath = null)
		{
			ExecutablePath = executablePath;
			ProcessName = Path.GetFileNameWithoutExtension(executablePath);
			GameRootPath = Path.GetDirectoryName(executablePath);

			if (ManagedPath == null || managedPath != null)
				ManagedPath = managedPath ?? Utility.CombinePaths(GameRootPath, $"{ProcessName}_Data", "Managed");

			if (BepInExRootPath == null || bepinRootPath != null)
				BepInExRootPath = bepinRootPath ?? Path.Combine(GameRootPath, "BepInEx");

			ConfigPath = Path.Combine(BepInExRootPath, "config");
			BepInExConfigPath = Path.Combine(ConfigPath, "BepInEx.cfg");

			if (PluginPath == null || pluginPath != null)
				PluginPath = pluginPath ?? Path.Combine(BepInExRootPath, "plugins");

			PatcherPluginPath = Path.Combine(BepInExRootPath, "patchers");
			BepInExAssemblyDirectory = Path.Combine(BepInExRootPath, "core");
			BepInExAssemblyPath = Path.Combine(BepInExAssemblyDirectory, $"{Assembly.GetExecutingAssembly().GetName().Name}.dll");
		}

		/// <summary>
		///     The directory that the core BepInEx DLLs reside in.
		/// </summary>
		public static string BepInExAssemblyDirectory { get; private set; }

		/// <summary>
		///     The path to the core BepInEx DLL.
		/// </summary>
		public static string BepInExAssemblyPath { get; private set; }

		/// <summary>
		///     The path to the main BepInEx folder.
		/// </summary>
		public static string BepInExRootPath { get; private set; }

		/// <summary>
		///     The path of the currently executing program BepInEx is encapsulated in.
		/// </summary>
		public static string ExecutablePath { get; private set; }

		/// <summary>
		///     The directory that the currently executing process resides in.
		/// </summary>
		public static string GameRootPath { get; private set; }

		/// <summary>
		///     The path to the Managed folder of the currently running Unity game.
		/// </summary>
		public static string ManagedPath { get; private set; }

		/// <summary>
		///		The path to the config directory.
		/// </summary>
		public static string ConfigPath { get; private set; }

		/// <summary>
		///		The path to the global BepInEx configuration file.
		/// </summary>
		public static string BepInExConfigPath { get; private set; }

		/// <summary>
		///     The path to the patcher plugin folder which resides in the BepInEx folder.
		/// </summary>
		public static string PatcherPluginPath { get; private set; }

		/// <summary>
		///     The path to the plugin folder which resides in the BepInEx folder.
		/// <para>
		///		This is ONLY guaranteed to be set correctly when Chainloader has been initialized.
		/// </para>
		/// </summary>
		public static string PluginPath { get; private set; }

		/// <summary>
		///     The name of the currently executing process.
		/// </summary>
		public static string ProcessName { get; private set; }
	}
}