using Bts.DataStreamCore.Services;
using Bts.PubSub.Services;
using Bts.SharedStreams.Services;

using Spark.Api.Services;
using Spark.Core.Services;

using System.Reactive.Linq;
using System.Reflection;

var builder = WebApplication.CreateBuilder(new WebApplicationOptions {
   Args = args,
   ApplicationName = "Bts.DataStreamWebApp.Server",
});
ConfigureApp(builder.Configuration, builder.Environment.EnvironmentName);
ConfigureServices(builder.Services, builder.Configuration);

var app = builder.Build();
var wsOpts = new WebSocketOptions {
   KeepAliveInterval = TimeSpan.FromMinutes(2)
};
if (app.Environment.IsDevelopment()) {
   app.UseDirectoryBrowser("/browse");
   app.UseSwagger();
   app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.UseWebSockets(wsOpts);
app.UseDefaultFiles();
app.UseStaticFiles();
app.UseAuthorization();
app.MapControllers();
try {
   Console.Write($"Starting Application");
   app.Run();
   Console.Write($"Application exited gracefully.");
} catch (Exception ex) {
   Console.Error.Write($"Application crashed: {ex}");
   return 1;
}
return 0;

static void ConfigureApp(ConfigurationManager configBuilder, string environment) {
   // We prefix appsettings with the exe name because multiple exes will usually be in the build dir
   // (this way, each exe can still load its own appsettings files from the current directory).
   var exeName = Assembly.GetCallingAssembly().GetName().Name;
   AddJsonFile($"{exeName}.appsettings.json");
   AddJsonFile($"{exeName}.appsettings.{environment}.json");

   var cfg = configBuilder.GetSection("config")?.Value;
   if (!SetBasePath(cfg)) {
      AddJsonFile(cfg);
   }

   bool SetBasePath(string? path) {
      if (!Directory.Exists(path)) {
         return false;
      }
      configBuilder.SetBasePath(path);
      return true;
   }

   bool AddJsonFile(string? path) {
      if (!File.Exists(path)) {
         return false;
      }
      configBuilder.AddJsonFile(path);
      return true;
   }
}

static void ConfigureServices(IServiceCollection services, IConfiguration config) {
   services.AddDirectoryBrowser()
      .AddControllers().Services
      .AddEndpointsApiExplorer()
      .AddSwaggerGen();
   services.AddSpaStaticFiles();
   services.AddSpark(config.GetSection("Spark"))
      .AddSparkApi(config.GetSection("SparkApi"))
      .AddMasterWorker(config.GetSection("MasterWorker"))
      .AddViewStreamDatabase()
      .AddPrimitiveDataStreamFactory(config.GetSection("PrimitiveStreams"))
      .AddOhlcvStreams(config.GetSection("StreamDatabase"))
      .AddNaturalLanguageStreams(config.GetSection("NaturalLanguageStream"))
      .AddCompositeDataStreamFactory()
      .AddPubSubClient(config.GetSection("PubSub"));
}