using MeterVault.App.Api;
using MeterVault.App.Components;
using MeterVault.Infrastructure;
using MeterVault.Infrastructure.Options;
using MeterVault.Infrastructure.Persistence;
using Microsoft.EntityFrameworkCore;
using MudBlazor.Services;
using Serilog;

Log.Logger = new LoggerConfiguration()
    .WriteTo.Console()
    .CreateBootstrapLogger();

try
{
    var builder = WebApplication.CreateBuilder(args);

    builder.Host.UseSerilog((context, services, configuration) => configuration
        .ReadFrom.Configuration(context.Configuration)
        .ReadFrom.Services(services)
        .Enrich.FromLogContext()
        .WriteTo.Console());

    builder.Services.Configure<MeterVaultOptions>(
        builder.Configuration.GetSection(MeterVaultOptions.SectionName));

    var connectionString = builder.Configuration.GetConnectionString("Default")
        ?? "Host=localhost;Port=5432;Database=metervault;Username=metervault;Password=metervault";
    builder.Services.AddMeterVaultInfrastructure(connectionString);

    var options = builder.Configuration.GetSection(MeterVaultOptions.SectionName).Get<MeterVaultOptions>()
        ?? new MeterVaultOptions();
    if (options.EnableLiveIngestion)
    {
        builder.Services.AddMeterVaultIngestion();
    }

    builder.Services.AddMudServices();
    builder.Services.AddRazorComponents()
        .AddInteractiveServerComponents();

    // Serialize/accept enums as strings on the REST API (e.g. event Type "Delivery").
    builder.Services.ConfigureHttpJsonOptions(o =>
        o.SerializerOptions.Converters.Add(new System.Text.Json.Serialization.JsonStringEnumConverter()));

    builder.Services.AddEndpointsApiExplorer();
    builder.Services.AddSwaggerGen(c =>
        c.SwaggerDoc("v1", new() { Title = "MeterVault API", Version = "v1" }));

    var app = builder.Build();

    await MigrateDatabaseAsync(app).ConfigureAwait(false);

    if (!app.Environment.IsDevelopment())
    {
        app.UseExceptionHandler("/Error", createScopeForErrors: true);
        app.UseHsts();
    }

    app.UseStatusCodePagesWithReExecute("/not-found", createScopeForStatusCodePages: true);
    app.UseSerilogRequestLogging();
    app.UseReverseProxyTrust();
    // No HTTPS redirection: the app serves plain HTTP (port 8760) behind a reverse proxy
    // that terminates TLS (SDD §10). HTTPS redirection here would break the container and proxy.
    app.UseAntiforgery();

    app.UseSwagger();
    app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "MeterVault API v1"));

    app.MapStaticAssets();
    app.MapRazorComponents<App>()
        .AddInteractiveServerRenderMode();

    app.MapMeterVaultApi();

    // Liveness/readiness probe for Gatus/Compose healthchecks (SDD §9).
    app.MapGet("/healthz", () => Results.Ok(new { status = "ok" }));

    await app.RunAsync().ConfigureAwait(false);
}
catch (Exception ex)
{
    Log.Fatal(ex, "MeterVault terminated unexpectedly");
    throw;
}
finally
{
    await Log.CloseAndFlushAsync().ConfigureAwait(false);
}

static async Task MigrateDatabaseAsync(WebApplication app)
{
    var options = app.Configuration
        .GetSection(MeterVaultOptions.SectionName)
        .Get<MeterVaultOptions>() ?? new MeterVaultOptions();

    if (!options.RunMigrationsAtStartup)
    {
        return;
    }

    await using var scope = app.Services.CreateAsyncScope();
    var db = scope.ServiceProvider.GetRequiredService<MeterVaultDbContext>();
    await db.Database.MigrateAsync().ConfigureAwait(false);
    await DatabaseSeeder.SeedAsync(db).ConfigureAwait(false);
    Log.Information("Database migrations applied and defaults seeded");

    if (options.SeedReferenceData)
    {
        var importer = scope.ServiceProvider.GetRequiredService<MeterVault.Infrastructure.Import.ReferenceDataImporter>();
        var dir = Path.Combine(AppContext.BaseDirectory, "sampledata");
        await importer.LoadAsync(dir).ConfigureAwait(false);
        Log.Information("Reference dataset ensured (SeedReferenceData=true)");
    }
}

/// <summary>Exposed for WebApplicationFactory-based integration tests.</summary>
public partial class Program;