// Copyright (c) 2023 Timothy Schenk. Subject to the GNU AGPL Version 3 License.

using System.Net;
using System.Reflection;
using System.Text.Json;
using Continuity.AuthServer.DB;
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 Wonderking.Game.Mapping;

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();
});

var configuration = builder.Configuration;
if (configuration.GetValue<bool>("Tracing:Enabled"))
{
    Action<ResourceBuilder> resourceBuilderAction = r => r
        .AddService("Continuity", serviceInstanceId: Environment.MachineName);

    builder.Services.AddOpenTelemetry()
        .ConfigureResource(resourceBuilderAction)
        .WithTracing(tracing =>
        {
            tracing.AddSource(nameof(Server));
            //tracing.AddSource("MassTransit");
            tracing.AddEntityFrameworkCoreInstrumentation(options => options.SetDbStatementForText = true);
            tracing.AddNpgsql();
        })
        .WithMetrics(metrics =>
        {
            metrics.AddRuntimeInstrumentation();
            metrics.AddProcessInstrumentation();
        });

    builder.Logging.AddOpenTelemetry(logging =>
    {
        var resourceBuilder = ResourceBuilder.CreateDefault();
        resourceBuilderAction(resourceBuilder);
        logging.SetResourceBuilder(resourceBuilder);
        logging.IncludeFormattedMessage = true;
        logging.IncludeScopes = true;
    });
    builder.Services.Configure<OpenTelemetryLoggerOptions>(logging =>
    {
        logging.AddOtlpExporter(options =>
        {
            options.Endpoint = new Uri(configuration["OTLP:Logging:Endpoint"] ?? string.Empty);
        });
    });
    builder.Services.ConfigureOpenTelemetryMeterProvider(metrics =>
    {
        metrics.AddOtlpExporter(options =>
            options.Endpoint = new Uri(configuration["OTLP:Metrics:Endpoint"] ?? string.Empty));
    });
    builder.Services.ConfigureOpenTelemetryTracerProvider(tracing =>
    {
        tracing.AddZipkinExporter(options =>
            options.Endpoint = new Uri(configuration["Zipkin:Endpoint"] ?? string.Empty));
        tracing.AddOtlpExporter(options => options.Endpoint = new Uri(configuration["OTLP:Tracing:Endpoint"] ?? string.Empty));
    });
}

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().UseLazyLoadingProxies().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<PacketDistributorService>();
builder.Services.AddSingleton<ItemObjectPoolService>();
builder.Services.AddHostedService(provider =>
    provider.GetService<ItemObjectPoolService>() ?? throw new InvalidOperationException());
builder.Services.AddHostedService(provider =>
    provider.GetService<PacketDistributorService>() ?? throw new InvalidOperationException());
builder.Services.AddMassTransit(x =>
{
    x.UsingInMemory((context, configurator) => configurator.ConfigureEndpoints(context));
    x.AddMediator(cfg => cfg.AddConsumers(Assembly.GetExecutingAssembly()));
});
builder.Services.AddHostedService(provider => new WonderkingAuthServer(IPAddress.Any, 10001,
    provider.GetService<ILogger<WonderkingAuthServer>>() ?? throw new InvalidOperationException(),
    provider.GetService<IServiceProvider>() ?? throw new InvalidOperationException()));

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

await host.RunAsync();