/*
    _                _      _  ____   _                           _____
   / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
  / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
 / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
/_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|

 Copyright 2015-2016 Łukasz "JustArchi" Domeradzki
 Contact: JustArchi@JustArchi.net

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0
					
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.

*/

using System;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Threading.Tasks;
using System.Windows.Forms;
using ArchiSteamFarm;

namespace ConfigGenerator {
	internal static class Program {
		internal const string ASF = "ASF";
		internal const string ConfigDirectory = "config";
		internal const string GlobalConfigFile = ASF + ".json";

		private const string ASFDirectory = "ArchiSteamFarm";
		private const string ASFExecutableFile = ASF + ".exe";

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		private static void Main() {
			Init();
			Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
			Application.Run(new MainForm());
		}

		private static void Init() {
			AppDomain.CurrentDomain.UnhandledException += UnhandledExceptionHandler;
			TaskScheduler.UnobservedTaskException += UnobservedTaskExceptionHandler;

			string homeDirectory = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
			if (!string.IsNullOrEmpty(homeDirectory)) {
				Directory.SetCurrentDirectory(homeDirectory);

				// Allow loading configs from source tree if it's a debug build
				if (Debugging.IsDebugBuild) {

					// Common structure is bin/(x64/)Debug/ArchiSteamFarm.exe, so we allow up to 4 directories up
					for (byte i = 0; i < 4; i++) {
						Directory.SetCurrentDirectory("..");
						if (!Directory.Exists(ASFDirectory)) {
							continue;
						}

						Directory.SetCurrentDirectory(ASFDirectory);
						break;
					}

					// If config directory doesn't exist after our adjustment, abort all of that
					if (!Directory.Exists(ConfigDirectory)) {
						Directory.SetCurrentDirectory(homeDirectory);
					}
				}
			}

			if (!Directory.Exists(ConfigDirectory)) {
				Logging.LogGenericErrorWithoutStacktrace("Config directory could not be found!");
				Environment.Exit(1);
			}

			if (!File.Exists(ASFExecutableFile)) {
				return;
			}

			FileVersionInfo asfVersionInfo = FileVersionInfo.GetVersionInfo(ASFExecutableFile);
			Version asfVersion = new Version(asfVersionInfo.ProductVersion);

			Version cgVersion = Assembly.GetEntryAssembly().GetName().Version;

			if (asfVersion == cgVersion) {
				return;
			}

			Logging.LogGenericErrorWithoutStacktrace(
				"Version of ASF and ConfigGenerator doesn't match!" + Environment.NewLine +
				"ASF version: " + asfVersion + " | ConfigGenerator version: " + cgVersion + Environment.NewLine +
				Environment.NewLine +
				"Please use ConfigGenerator from the same ASF release, I'll redirect you to appropriate ASF release..."
			);

			Process.Start("https://github.com/" + SharedInfo.GithubRepo + "/releases/tag/" + asfVersion);
			Environment.Exit(1);
		}

		private static void UnhandledExceptionHandler(object sender, UnhandledExceptionEventArgs args) {
			if (args?.ExceptionObject == null) {
				Logging.LogNullError(nameof(args) + " || " + nameof(args.ExceptionObject));
				return;
			}

			Logging.LogGenericException((Exception) args.ExceptionObject);
		}

		private static void UnobservedTaskExceptionHandler(object sender, UnobservedTaskExceptionEventArgs args) {
			if (args?.Exception == null) {
				Logging.LogNullError(nameof(args) + " || " + nameof(args.Exception));
				return;
			}

			Logging.LogGenericException(args.Exception);
		}
	}
}