namespace Cef3
{
    using System;
    using System.Collections.Generic;
    using System.Text;
    using Cef3.Interop;

    /// <summary>
    /// Initialization settings. Specify <c>null</c> or 0 to get the recommended default
    /// values. Many of these and other settings can also configured using command-line
    /// switches.
    /// </summary>
    public sealed unsafe class CefSettings
    {
        public CefSettings()
        {
            BackgroundColor = new CefColor(255, 255, 255, 255);
        }

        /// <summary>
        /// Set to <c>true</c> to use a single process for the browser and renderer. This
        /// run mode is not officially supported by Chromium and is less stable than
        /// the multi-process default. Also configurable using the "single-process"
        /// command-line switch.
        /// </summary>
        public bool SingleProcess { get; set; }

        /// <summary>
        /// Set to <c>true</c> to disable the sandbox for sub-processes. See
        /// cef_sandbox_win.h for requirements to enable the sandbox on Windows. Also
        /// configurable using the "no-sandbox" command-line switch.
        /// </summary>
        public bool NoSandbox { get; set; }

        /// <summary>
        /// The path to a separate executable that will be launched for sub-processes.
        /// By default the browser process executable is used. See the comments on
        /// CefExecuteProcess() for details. Also configurable using the
        /// "browser-subprocess-path" command-line switch.
        /// </summary>
        public string BrowserSubprocessPath { get; set; }

        /// <summary>
        /// Set to <c>true</c> to have the browser process message loop run in a separate
        /// thread. If <c>false</c> than the CefDoMessageLoopWork() function must be
        /// called from your application message loop. This option is only supported on
        /// Windows.
        /// </summary>
        public bool MultiThreadedMessageLoop { get; set; }

        /// <summary>
        /// Set to true (1) to enable windowless (off-screen) rendering support. Do not
        /// enable this value if the application does not use windowless rendering as
        /// it may reduce rendering performance on some systems.
        /// </summary>
        public bool WindowlessRenderingEnabled { get; set; }

        /// <summary>
        /// Set to <c>true</c> to disable configuration of browser process features using
        /// standard CEF and Chromium command-line arguments. Configuration can still
        /// be specified using CEF data structures or via the
        /// CefApp::OnBeforeCommandLineProcessing() method.
        /// </summary>
        public bool CommandLineArgsDisabled { get; set; }

        /// <summary>
        /// The location where cache data will be stored on disk. If empty then
        /// browsers will be created in "incognito mode" where in-memory caches are
        /// used for storage and no data is persisted to disk. HTML5 databases such as
        /// localStorage will only persist across sessions if a cache path is
        /// specified. Can be overridden for individual CefRequestContext instances via
        /// the CefRequestContextSettings.cache_path value.
        /// </summary>
        public string CachePath { get; set; }

        /// <summary>
        /// The location where user data such as spell checking dictionary files will
        /// be stored on disk. If empty then the default platform-specific user data
        /// directory will be used ("~/.cef_user_data" directory on Linux,
        /// "~/Library/Application Support/CEF/User Data" directory on Mac OS X,
        /// "Local Settings\Application Data\CEF\User Data" directory under the user
        /// profile directory on Windows).
        /// </summary>
        public string UserDataPath { get; set; }

        /// <summary>
        /// To persist session cookies (cookies without an expiry date or validity
        /// interval) by default when using the global cookie manager set this value to
        /// true. Session cookies are generally intended to be transient and most Web
        /// browsers do not persist them. A |cache_path| value must also be specified
        /// to enable this feature. Also configurable using the
        /// "persist-session-cookies" command-line switch. Can be overridden for
        /// individual CefRequestContext instances via the
        /// CefRequestContextSettings.persist_session_cookies value.
        /// </summary>
        public bool PersistSessionCookies { get; set; }

        /// <summary>
        /// Value that will be returned as the User-Agent HTTP header. If empty the
        /// default User-Agent string will be used. Also configurable using the
        /// "user-agent" command-line switch.
        /// </summary>
        public string UserAgent { get; set; }

        /// <summary>
        /// Value that will be inserted as the product portion of the default
        /// User-Agent string. If empty the Chromium product version will be used. If
        /// |userAgent| is specified this value will be ignored. Also configurable
        /// using the "product-version" command-line switch.
        /// </summary>
        public string ProductVersion { get; set; }

        /// <summary>
        /// The locale string that will be passed to WebKit. If empty the default
        /// locale of "en-US" will be used. This value is ignored on Linux where locale
        /// is determined using environment variable parsing with the precedence order:
        /// LANGUAGE, LC_ALL, LC_MESSAGES and LANG. Also configurable using the "lang"
        /// command-line switch.
        /// </summary>
        public string Locale { get; set; }

        /// <summary>
        /// The directory and file name to use for the debug log. If empty, the
        /// default name of "debug.log" will be used and the file will be written
        /// to the application directory. Also configurable using the "log-file"
        /// command-line switch.
        /// </summary>
        public string LogFile { get; set; }

        /// <summary>
        /// The log severity. Only messages of this severity level or higher will be
        /// logged. Also configurable using the "log-severity" command-line switch with
        /// a value of "verbose", "info", "warning", "error", "error-report" or
        /// "disable".
        /// </summary>
        public CefLogSeverity LogSeverity { get; set; }

        /// <summary>
        /// Custom flags that will be used when initializing the V8 JavaScript engine.
        /// The consequences of using custom flags may not be well tested. Also
        /// configurable using the "js-flags" command-line switch.
        /// </summary>
        public string JavaScriptFlags { get; set; }

        /// <summary>
        /// The fully qualified path for the resources directory. If this value is
        /// empty the cef.pak and/or devtools_resources.pak files must be located in
        /// the module directory on Windows/Linux or the app bundle Resources directory
        /// on Mac OS X. Also configurable using the "resources-dir-path" command-line
        /// switch.
        /// </summary>
        public string ResourcesDirPath { get; set; }

        /// <summary>
        /// The fully qualified path for the locales directory. If this value is empty
        /// the locales directory must be located in the module directory. This value
        /// is ignored on Mac OS X where pack files are always loaded from the app
        /// bundle resource directory. Also configurable using the "locales-dir-path"
        /// command-line switch.
        /// </summary>
        public string LocalesDirPath { get; set; }

        /// <summary>
        /// Set to <c>true</c> to disable loading of pack files for resources and locales.
        /// A resource bundle handler must be provided for the browser and render
        /// processes via CefApp::GetResourceBundleHandler() if loading of pack files
        /// is disabled. Also configurable using the "disable-pack-loading" command-
        /// line switch.
        /// </summary>
        public bool PackLoadingDisabled { get; set; }

        /// <summary>
        /// Set to a value between 1024 and 65535 to enable remote debugging on the
        /// specified port. For example, if 8080 is specified the remote debugging URL
        /// will be http://localhost:8080. CEF can be remotely debugged from any CEF or
        /// Chrome browser window. Also configurable using the "remote-debugging-port"
        /// command-line switch.
        /// </summary>
        public int RemoteDebuggingPort { get; set; }

        /// <summary>
        /// The number of stack trace frames to capture for uncaught exceptions.
        /// Specify a positive value to enable the CefV8ContextHandler::
        /// OnUncaughtException() callback. Specify 0 (default value) and
        /// OnUncaughtException() will not be called. Also configurable using the
        /// "uncaught-exception-stack-size" command-line switch.
        /// </summary>
        public int UncaughtExceptionStackSize { get; set; }

        /// <summary>
        /// By default CEF V8 references will be invalidated (the IsValid() method will
        /// return false) after the owning context has been released. This reduces the
        /// need for external record keeping and avoids crashes due to the use of V8
        /// references after the associated context has been released.
        ///
        /// CEF currently offers two context safety implementations with different
        /// performance characteristics. The default implementation (value of 0) uses a
        /// map of hash values and should provide better performance in situations with
        /// a small number contexts. The alternate implementation (value of 1) uses a
        /// hidden value attached to each context and should provide better performance
        /// in situations with a large number of contexts.
        ///
        /// If you need better performance in the creation of V8 references and you
        /// plan to manually track context lifespan you can disable context safety by
        /// specifying a value of -1.
        ///
        /// Also configurable using the "context-safety-implementation" command-line
        /// switch.
        /// </summary>
        public CefContextSafetyImplementation ContextSafetyImplementation { get; set; }

        /// <summary>
        /// Set to true (1) to ignore errors related to invalid SSL certificates.
        /// Enabling this setting can lead to potential security vulnerabilities like
        /// "man in the middle" attacks. Applications that load content from the
        /// internet should not enable this setting. Also configurable using the
        /// "ignore-certificate-errors" command-line switch. Can be overridden for
        /// individual CefRequestContext instances via the
        /// CefRequestContextSettings.ignore_certificate_errors value.
        /// </summary>
        public bool IgnoreCertificateErrors { get; set; }

        /// <summary>
        /// Opaque background color used for accelerated content. By default the
        /// background color will be white. Only the RGB compontents of the specified
        /// value will be used. The alpha component must greater than 0 to enable use
        /// of the background color but will be otherwise ignored.
        /// </summary>
        public CefColor BackgroundColor { get; set; }

        /// <summary>
        /// Comma delimited ordered list of language codes without any whitespace that
        /// will be used in the "Accept-Language" HTTP header. May be overridden on a
        /// per-browser basis using the CefBrowserSettings.accept_language_list value.
        /// If both values are empty then "en-US,en" will be used. Can be overridden
        /// for individual CefRequestContext instances via the
        /// CefRequestContextSettings.accept_language_list value.
        /// </summary>
        public string AcceptLanguageList { get; set; }

        internal cef_settings_t* ToNative()
        {
            var ptr = cef_settings_t.Alloc();
            ptr->single_process = SingleProcess ? 1 : 0;
            ptr->no_sandbox = NoSandbox ? 1 : 0;
            cef_string_t.Copy(BrowserSubprocessPath, &ptr->browser_subprocess_path);
            ptr->multi_threaded_message_loop = MultiThreadedMessageLoop ? 1 : 0;
            ptr->windowless_rendering_enabled = WindowlessRenderingEnabled ? 1 : 0;
            ptr->command_line_args_disabled = CommandLineArgsDisabled ? 1 : 0;
            cef_string_t.Copy(CachePath, &ptr->cache_path);
            cef_string_t.Copy(UserDataPath, &ptr->user_data_path);
            ptr->persist_session_cookies = PersistSessionCookies ? 1 : 0;
            cef_string_t.Copy(UserAgent, &ptr->user_agent);
            cef_string_t.Copy(ProductVersion, &ptr->product_version);
            cef_string_t.Copy(Locale, &ptr->locale);
            cef_string_t.Copy(LogFile, &ptr->log_file);
            ptr->log_severity = LogSeverity;
            cef_string_t.Copy(JavaScriptFlags, &ptr->javascript_flags);
            cef_string_t.Copy(ResourcesDirPath, &ptr->resources_dir_path);
            cef_string_t.Copy(LocalesDirPath, &ptr->locales_dir_path);
            ptr->pack_loading_disabled = PackLoadingDisabled ? 1 : 0;
            ptr->remote_debugging_port = RemoteDebuggingPort;
            ptr->uncaught_exception_stack_size = UncaughtExceptionStackSize;
            ptr->context_safety_implementation = (int)ContextSafetyImplementation;
            ptr->ignore_certificate_errors = IgnoreCertificateErrors ? 1 : 0;
            ptr->background_color = BackgroundColor.ToArgb();
            cef_string_t.Copy(AcceptLanguageList, &ptr->accept_language_list);
            return ptr;
        }

        private static void Clear(cef_settings_t* ptr)
        {
            libcef.string_clear(&ptr->browser_subprocess_path);
            libcef.string_clear(&ptr->cache_path);
            libcef.string_clear(&ptr->user_data_path);
            libcef.string_clear(&ptr->user_agent);
            libcef.string_clear(&ptr->product_version);
            libcef.string_clear(&ptr->locale);
            libcef.string_clear(&ptr->log_file);
            libcef.string_clear(&ptr->javascript_flags);
            libcef.string_clear(&ptr->resources_dir_path);
            libcef.string_clear(&ptr->locales_dir_path);
            libcef.string_clear(&ptr->accept_language_list);
        }

        internal static void Free(cef_settings_t* ptr)
        {
            Clear(ptr);
            cef_settings_t.Free(ptr);
        }
    }
}