using System;
using System.IO;
using System.Reflection;
using Inventory.Core;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

namespace Inventory.Agent
{
    public class Program
    {
        public static void Main(string[] args)
        {
            // Set the current directory to the application's base directory.
            // This ensures that files like .env are found correctly when running as a service.
            Directory.SetCurrentDirectory(AppContext.BaseDirectory);

            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .UseWindowsService() // Important for running as a Windows Service
                .ConfigureHostConfiguration(config =>
                {
#if DEBUG
                    config.AddInMemoryCollection(new[] { new KeyValuePair<string, string>(HostDefaults.EnvironmentKey, "Development") });
#endif
                })
                .ConfigureLogging(logging =>
                {
                    // Configure logging providers for the service
                    logging.ClearProviders();
                    logging.AddEventLog(); // Log to Windows Event Viewer
                    logging.AddConsole();  // Also log to console for debugging
                })
                .ConfigureAppConfiguration((context, config) =>
                {
                    // Setup secrets here, after the default configuration and environment are established.
                    EnvironmentBuilder.SetupEnvironment(context.HostingEnvironment);
                })
                .ConfigureServices((hostContext, services) =>
                {
                    var dbCon = Secrets.DbConnectionString;
                    if (string.IsNullOrWhiteSpace(dbCon))
                    {
                        // This will now correctly log to the Event Viewer if the .env file is missing or misconfigured.
                        throw new InvalidOperationException("FATAL ERROR: DB_CONNECTION_STRING is not configured. The service cannot start.");
                    }

                    services.AddDbContext<InventoryContext>(options => options.UseSqlServer(dbCon));
                    services.AddHostedService<Worker>();
                    services.AddHttpClient();
                    services.AddSingleton<SystemInfoCollector>(provider =>
                    {
                        var collector = new SystemInfoCollector();
                        collector.Consumer = ConsumerType.Agent; // Explicitly set the consumer
                        return collector;
                    });
                    services.AddScoped<DatabaseUpdater>(provider => new DatabaseUpdater(
                        provider.GetRequiredService<InventoryContext>(),
                        provider.GetRequiredService<SystemInfoCollector>(),
                        provider.GetRequiredService<HealthMonitor>(),
                        ConsumerType.Agent
                    ));
                    services.AddScoped<HealthMonitor>();
                    services.AddScoped<SlurpitClient>(); // No longer needs collector/monitor
                    services.AddScoped<UpdateWorkflow>(provider => new UpdateWorkflow(
                        provider.GetRequiredService<DatabaseUpdater>(),
                        provider.GetRequiredService<SystemInfoCollector>(),
                        provider.GetRequiredService<InventoryContext>(),
                        provider.GetRequiredService<SlurpitClient>()
                    ));
                });
    }
}