using System;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;

namespace HashCalculator.GUI
{
    public static class Program
    {
        [STAThread]
        public static void Main()
        {
            try
            {
                AppDomain.CurrentDomain.AssemblyResolve += OnResolveAssembly;
                App.Main();
            }
            catch(Exception exception)
            {
                ErrorBox($"发生了无法处理的错误：\r\n{exception}\r\n可以尝试在百度红警3吧联系岚依");
                throw;
            }
        }

        private static Assembly OnResolveAssembly(object? sender, ResolveEventArgs args)
        {
            var executingAssembly = Assembly.GetExecutingAssembly();
            var assemblyName = new AssemblyName(args.Name);
            var nameString = assemblyName.Name 
                ?? throw new InvalidOperationException("Assembly does not have an name");

            var paths = new[] { $"{nameString}.dll" }.AsEnumerable();
            const string resourceExtenstion = ".resources";
            if (nameString.EndsWith(resourceExtenstion, StringComparison.OrdinalIgnoreCase))
            {
                paths = paths.Append(nameString.Insert(nameString.Length - resourceExtenstion.Length, ".g"));
            }
            if (!Equals(assemblyName.CultureInfo, CultureInfo.InvariantCulture))
            {
                paths = paths.Select(x => $"{assemblyName.CultureInfo}\\{x}").Concat(paths);
            }

            foreach(var path in paths)
            {
                using var stream = executingAssembly.GetManifestResourceStream(path);
                if (stream == null)
                {
                    continue;
                }

                using (stream)
                {
                    var assemblyRawBytes = new byte[stream.Length];
                    stream.Read(assemblyRawBytes, 0, assemblyRawBytes.Length);
                    return Assembly.Load(assemblyRawBytes);
                }
            }

            var errorMessage = $"Failed to load assembly {nameString}";
            throw new ApplicationException(errorMessage);
        }

        public static void ErrorBox(string text)
        {
            _ = NativeMethods.MessageBox(IntPtr.Zero, text, null, 0x00000010L);
        }
    }

    internal static class NativeMethods
    {
        [DllImport("User32.dll", CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Unicode)]
        public static extern int MessageBox(IntPtr hWnd, string lpText, string? lpCaption, ulong uType);
    }
}