// Licensed to Timothy Schenk under the GNU AGPL Version 3 License.

using System.Net;
using System.Reflection;
using System.Text.Json;
using Continuity.AuthServer;
using Continuity.AuthServer.DB;
using Continuity.AuthServer.PacketHandlers;
using Continuity.AuthServer.Services;
using MassTransit;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Diagnostics.HealthChecks;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Npgsql;
using OpenTelemetry.Logs;
using OpenTelemetry.Metrics;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;
using RaiNote.PacketMediator;
using Wonderking.Game.Mapping;
using Wonderking.Packets;

var builder = Host.CreateApplicationBuilder();
#if DEBUG
builder.Environment.EnvironmentName = "Development";
#endif

builder.Services.AddMetrics();

builder.Configuration.AddJsonFile("settings.json", true, true)
    .AddJsonFile($"settings.{builder.Environment.EnvironmentName}.json", true)
    .AddEnvironmentVariables().Build();

builder.Services.AddLogging();
var loggerFactory = LoggerFactory.Create(loggingBuilder =>
{
    loggingBuilder.AddFile("logs/Continuity.AuthServer-{Date}.log", LogLevel.Trace);
    loggingBuilder.AddFile("logs/Continuity.AuthServer-{Date}.json.log", LogLevel.Trace, isJson: true);
    loggingBuilder.AddConsole();
    loggingBuilder.AddOpenTelemetry();
});

var configuration = builder.Configuration;

builder.Logging.AddOpenTelemetry(logging =>
{
    logging.IncludeFormattedMessage = true;
    logging.IncludeScopes = true;
});

builder.Services.AddOpenTelemetry()
    .WithMetrics(metrics =>
    {
        metrics.AddRuntimeInstrumentation().AddProcessInstrumentation().AddMeter("Microsoft.AspNetCore.Hosting", nameof(Continuity.AuthServer))
            .ConfigureResource(resourceBuilder => resourceBuilder.AddService("Continuity", serviceNamespace: "Wonderking", serviceVersion: "0.0.1"));
    })
    .WithTracing(tracing =>
    {
        if (builder.Environment.IsDevelopment())
        {
            tracing.SetSampler<AlwaysOnSampler>();
        }
        tracing.AddEntityFrameworkCoreInstrumentation(options => options.SetDbStatementForText = true).AddNpgsql();
    });

builder.Services.AddMetrics();

builder.Services.Configure<OpenTelemetryLoggerOptions>(logging => logging.AddOtlpExporter());
builder.Services.ConfigureOpenTelemetryMeterProvider(meter => meter.AddOtlpExporter());
builder.Services.ConfigureOpenTelemetryTracerProvider(tracer => tracer.AddOtlpExporter());

builder.Services.AddHealthChecks()
    .AddCheck("self", () => HealthCheckResult.Healthy(), ["live"]);

builder.Services.AddDbContextPool<WonderkingContext>(o =>
{
    o.UseNpgsql(
            $"Host={configuration["DB:Host"]};Username={configuration["DB:Username"]};Password={configuration["DB:Password"]};Database={configuration["DB:Database"]};Port={configuration["DB:Port"]}")
        .EnableSensitiveDataLogging().UseLoggerFactory(loggerFactory);
});

builder.Services.AddSingleton<CharacterStatsMappingConfiguration>(
    JsonSerializer.Deserialize<CharacterStatsMappingConfiguration>(
        File.ReadAllText("config/character-stats.mapping.json")) ?? throw new InvalidOperationException());

builder.Services.AddSingleton<ILoggerFactory>(loggerFactory);
builder.Services.AddSingleton(provider =>
    new PacketDistributorService<OperationCode, AuthSession>(
        provider.GetRequiredService<IServiceProvider>(),
        new List<Assembly> { Assembly.GetAssembly(typeof(OperationCode)) }.AsReadOnly(),
        new List<Assembly> { Assembly.GetAssembly(typeof(LoginHandler)) }.AsReadOnly()
    ));
builder.Services.AddSingleton<ItemObjectPoolService>();

builder.Services.AddHostedService(provider => new WonderkingAuthServer(IPAddress.Any, 10001,
    provider.GetService<ILogger<WonderkingAuthServer>>() ?? throw new InvalidOperationException(),
    provider.GetService<IServiceProvider>() ?? throw new InvalidOperationException()));

builder.Services.AddHostedService(provider =>
    provider.GetService<ItemObjectPoolService>() ?? throw new InvalidOperationException());

builder.Services.AddHostedService(provider =>
    provider.GetService<PacketDistributorService<OperationCode, AuthSession>>() ??
    throw new InvalidOperationException());

builder.Services.AddMassTransit(x =>
{
    x.UsingInMemory((context, configurator) => configurator.ConfigureEndpoints(context));
    x.AddMediator(cfg => cfg.AddConsumers(Assembly.GetExecutingAssembly()));
});

using var host = builder.Build();

await using (var scope = host.Services.CreateAsyncScope())
{
    var db = scope.ServiceProvider.GetRequiredService<WonderkingContext>();
    await db.Database.MigrateAsync();
}

await host.RunAsync();