/*
 * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
 * 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

using System;
using System.IO;
using SafeExamBrowser.Contracts.Configuration;
using SafeExamBrowser.Contracts.Configuration.Settings;
using SafeExamBrowser.Contracts.Logging;

namespace SafeExamBrowser.Configuration.ConfigurationData
{
	internal class DataValues
	{
		private const string DEFAULT_CONFIGURATION_NAME = "SebClientSettings.seb";

		private AppConfig appConfig;
		private string executablePath;
		private string programCopyright;
		private string programTitle;
		private string programVersion;

		internal DataValues(string executablePath, string programCopyright, string programTitle, string programVersion)
		{
			this.executablePath = executablePath ?? string.Empty;
			this.programCopyright = programCopyright ?? string.Empty;
			this.programTitle = programTitle ?? string.Empty;
			this.programVersion = programVersion ?? string.Empty;
		}

		internal string GetAppDataFilePath()
		{
			return appConfig.AppDataFilePath;
		}

		internal AppConfig InitializeAppConfig()
		{
			var appDataLocalFolder = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), nameof(SafeExamBrowser));
			var appDataRoamingFolder = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), nameof(SafeExamBrowser));
			var programDataFolder = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), nameof(SafeExamBrowser));
			var startTime = DateTime.Now;
			var logFolder = Path.Combine(appDataLocalFolder, "Logs");
			var logFilePrefix = startTime.ToString("yyyy-MM-dd\\_HH\\hmm\\mss\\s");

			appConfig = new AppConfig();
			appConfig.AppDataFilePath = Path.Combine(appDataRoamingFolder, DEFAULT_CONFIGURATION_NAME);
			appConfig.ApplicationStartTime = startTime;
			appConfig.BrowserCachePath = Path.Combine(appDataLocalFolder, "Cache");
			appConfig.BrowserLogFilePath = Path.Combine(logFolder, $"{logFilePrefix}_Browser.log");
			appConfig.ClientId = Guid.NewGuid();
			appConfig.ClientAddress = $"{AppConfig.BASE_ADDRESS}/client/{Guid.NewGuid()}";
			appConfig.ClientExecutablePath = Path.Combine(Path.GetDirectoryName(executablePath), $"{nameof(SafeExamBrowser)}.Client.exe");
			appConfig.ClientLogFilePath = Path.Combine(logFolder, $"{logFilePrefix}_Client.log");
			appConfig.ConfigurationFileExtension = ".seb";
			appConfig.DownloadDirectory = Path.Combine(appDataLocalFolder, "Downloads");
			appConfig.ProgramCopyright = programCopyright;
			appConfig.ProgramDataFilePath = Path.Combine(programDataFolder, DEFAULT_CONFIGURATION_NAME);
			appConfig.ProgramTitle = programTitle;
			appConfig.ProgramVersion = programVersion;
			appConfig.RuntimeId = Guid.NewGuid();
			appConfig.RuntimeAddress = $"{AppConfig.BASE_ADDRESS}/runtime/{Guid.NewGuid()}";
			appConfig.RuntimeLogFilePath = Path.Combine(logFolder, $"{logFilePrefix}_Runtime.log");
			appConfig.SebUriScheme = "seb";
			appConfig.SebUriSchemeSecure = "sebs";
			appConfig.ServiceAddress = $"{AppConfig.BASE_ADDRESS}/service";
			appConfig.ServiceEventName = $@"Global\{nameof(SafeExamBrowser)}-{Guid.NewGuid()}";
			appConfig.ServiceLogFilePath = Path.Combine(logFolder, $"{logFilePrefix}_Service.log");

			return appConfig;
		}

		internal SessionConfiguration InitializeSessionConfiguration()
		{
			var configuration = new SessionConfiguration();

			appConfig.ClientId = Guid.NewGuid();
			appConfig.ClientAddress = $"{AppConfig.BASE_ADDRESS}/client/{Guid.NewGuid()}";
			appConfig.ServiceEventName = $@"Global\{nameof(SafeExamBrowser)}-{Guid.NewGuid()}";

			configuration.AppConfig = appConfig.Clone();
			configuration.ClientAuthenticationToken = Guid.NewGuid();
			configuration.SessionId = Guid.NewGuid();

			return configuration;
		}

		internal Settings LoadDefaultSettings()
		{
			var settings = new Settings();

			settings.ActionCenter.EnableActionCenter = true;
			settings.ActionCenter.ShowApplicationInfo = true;
			settings.ActionCenter.ShowApplicationLog = false;
			settings.ActionCenter.ShowKeyboardLayout = true;
			settings.ActionCenter.ShowWirelessNetwork = false;
			settings.ActionCenter.ShowClock = true;

			settings.Browser.StartUrl = "https://www.safeexambrowser.org/start";
			settings.Browser.AllowConfigurationDownloads = true;
			settings.Browser.AllowDownloads = true;
			settings.Browser.AllowPageZoom = true;
			settings.Browser.AllowPopups = true;
			settings.Browser.AdditionalWindowSettings.AllowAddressBar = false;
			settings.Browser.AdditionalWindowSettings.AllowBackwardNavigation = true;
			settings.Browser.AdditionalWindowSettings.AllowDeveloperConsole = false;
			settings.Browser.AdditionalWindowSettings.AllowForwardNavigation = true;
			settings.Browser.AdditionalWindowSettings.AllowReloading = true;
			settings.Browser.AdditionalWindowSettings.FullScreenMode = false;
			settings.Browser.AdditionalWindowSettings.ShowReloadWarning = false;
			settings.Browser.MainWindowSettings.AllowAddressBar = false;
			settings.Browser.MainWindowSettings.AllowBackwardNavigation = false;
			settings.Browser.MainWindowSettings.AllowDeveloperConsole = false;
			settings.Browser.MainWindowSettings.AllowForwardNavigation = false;
			settings.Browser.MainWindowSettings.AllowReloading = true;
			settings.Browser.MainWindowSettings.FullScreenMode = false;
			settings.Browser.MainWindowSettings.ShowReloadWarning = true;

			settings.Keyboard.AllowAltEsc = false;
			settings.Keyboard.AllowAltF4 = false;
			settings.Keyboard.AllowAltTab = true;
			settings.Keyboard.AllowCtrlEsc = false;
			settings.Keyboard.AllowEsc = true;
			settings.Keyboard.AllowF1 = true;
			settings.Keyboard.AllowF2 = true;
			settings.Keyboard.AllowF3 = true;
			settings.Keyboard.AllowF4 = true;
			settings.Keyboard.AllowF5 = true;
			settings.Keyboard.AllowF6 = true;
			settings.Keyboard.AllowF7 = true;
			settings.Keyboard.AllowF8 = true;
			settings.Keyboard.AllowF9 = true;
			settings.Keyboard.AllowF10 = true;
			settings.Keyboard.AllowF11 = true;
			settings.Keyboard.AllowF12 = true;
			settings.Keyboard.AllowPrintScreen = false;
			settings.Keyboard.AllowSystemKey = false;

			settings.KioskMode = KioskMode.CreateNewDesktop;

			settings.LogLevel = LogLevel.Debug;

			settings.Mouse.AllowMiddleButton = false;
			settings.Mouse.AllowRightButton = true;

			settings.Service.DisableChromeNotifications = true;
			settings.Service.DisableEaseOfAccessOptions = true;
			settings.Service.DisableNetworkOptions = true;
			settings.Service.DisablePasswordChange = true;
			settings.Service.DisablePowerOptions = true;
			settings.Service.DisableRemoteConnections = true;
			settings.Service.DisableSignout = true;
			settings.Service.DisableTaskManager = true;
			settings.Service.DisableUserLock = true;
			settings.Service.DisableUserSwitch = true;
			settings.Service.DisableVmwareOverlay = true;
			settings.Service.DisableWindowsUpdate = true;
			settings.Service.Policy = ServicePolicy.Mandatory;

			settings.AllowApplicationLogAccess = false;

			settings.Taskbar.EnableTaskbar = true;
			settings.Taskbar.ShowApplicationInfo = false;
			settings.Taskbar.ShowApplicationLog = false;
			settings.Taskbar.ShowKeyboardLayout = true;
			settings.Taskbar.ShowWirelessNetwork = false;
			settings.Taskbar.ShowClock = true;

			settings.UserInterfaceMode = UserInterfaceMode.Desktop;
			
			return settings;
		}
	}
}