using System;
using FinlyticAnalyzer.Database;
using FinlyticAnalyzer.Services;
using FinlyticAnalyzer.Util;
using FinlyticCore.Database;
using FinlyticCore.Services;
using FinlyticCore.Services.Yahoo;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

var builder = Host.CreateApplicationBuilder(args);

// Register DB Context
builder.Services.AddDbContext<AnalyzerDbContext>(options =>
    options.UseNpgsql(builder.Configuration.GetConnectionString("DefaultConnection")));
builder.Services.AddScoped<ISettingsDbContext>(sp => sp.GetRequiredService<AnalyzerDbContext>());

// Register Core Services
builder.Services.AddSingleton<ISettingsService, SettingsService>();
builder.Services.AddSingleton(typeof(IFinlyticLogger<>), typeof(FinlyticLogger<>));

// Register HTTP Clients for external webhooks (HttpClientFactory manages pool)
builder.Services.AddHttpClient<IN8nEvaluationService, N8nEvaluationService>();

// Register Domain Services
builder.Services.AddSingleton<IVixTrackerService, VixTrackerService>();
builder.Services.AddSingleton<IThreeLayerFilterEngine, ThreeLayerFilterEngine>();
builder.Services.AddSingleton<IWinRateCalculator, WinRateCalculator>();
builder.Services.AddScoped<ISettingsDbService, SettingsDbService>();
builder.Services.AddSingleton<YahooFinanceClient>();

// Unified MQTT Client (Handles both Events and RPC)
builder.Services.AddSingleton<AnalyzerMqttClient>();
builder.Services.AddHostedService(provider => provider.GetRequiredService<AnalyzerMqttClient>());

// Register Active Trade Monitor
builder.Services.AddHostedService<ActiveTradeMonitorWorker>();

var host = builder.Build();

// Run DB Migrations
using (var scope = host.Services.CreateScope())
{
    try
    {
        var context = scope.ServiceProvider.GetRequiredService<AnalyzerDbContext>();
        await context.Database.MigrateAsync();
        Console.WriteLine("Database migrations successfully executed for FinlyticAnalyzer.");
    }
    catch (Exception ex)
    {
        Console.WriteLine($"Critical error during database migration for FinlyticAnalyzer: {ex.Message}");
    }
}

// Initial VIX Poll
using (var scope = host.Services.CreateScope())
{
    var vixService = scope.ServiceProvider.GetRequiredService<IVixTrackerService>();
    await vixService.PollVixAsync();
}

await host.RunAsync();