using Asp.Versioning;
using Asp.Versioning.ApiExplorer;
using Microsoft.Extensions.Options;
using Swashbuckle.AspNetCore.SwaggerGen;
using TarninaHub.Application.Abstractions;
using TarninaHub.Configuration;
using TarninaHub.Errors;
using TarninaHub.Infrastructure;

var builder = WebApplication.CreateBuilder(args);

// Layered infrastructure: SurrealDB client, settings and persistence services.
builder.Services.AddInfrastructure(builder.Configuration);

builder.Services.AddControllers();

// Uniform error responses (RFC 7807) and a global exception handler.
builder.Services.AddProblemDetails();
builder.Services.AddExceptionHandler<GlobalExceptionHandler>();

// API versioning: `?api-version=1.0` or header `X-Api-Version`; default 1.0.
builder.Services
    .AddApiVersioning(options =>
    {
        options.DefaultApiVersion = new ApiVersion(1, 0);
        options.AssumeDefaultVersionWhenUnspecified = true;
        options.ApiVersionReader = ApiVersionReader.Combine(
            new QueryStringApiVersionReader("api-version"),
            new HeaderApiVersionReader("X-Api-Version"));
        options.ReportApiVersions = true;
    })
    .AddMvc()
    .AddApiExplorer(options =>
    {
        options.GroupNameFormat = "'v'VVV";
        options.SubstituteApiVersionInUrl = true;
    });

// OpenAPI document + Swagger UI (Swashbuckle), one document per API version.
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddTransient<IConfigureOptions<SwaggerGenOptions>, ConfigureSwaggerOptions>();
builder.Services.AddSwaggerGen();

var app = builder.Build();

using (var scope = app.Services.CreateScope())
{
    var migrationRunner = scope.ServiceProvider.GetRequiredService<IMigrationRunner>();
    var storageService = scope.ServiceProvider.GetRequiredService<IStorageService>();

    await migrationRunner.ApplyAsync(CancellationToken.None);
    await storageService.InitializeAsync(CancellationToken.None);
}

app.UseExceptionHandler();
app.UseStatusCodePages();

app.UseSwagger();
app.UseSwaggerUI(options =>
{
    var provider = app.Services.GetRequiredService<IApiVersionDescriptionProvider>();

    foreach (var description in provider.ApiVersionDescriptions)
    {
        options.SwaggerEndpoint(
            $"/swagger/{description.GroupName}/swagger.json",
            $"TarninaHub API {description.GroupName.ToUpperInvariant()}");
    }
});

if (!app.Environment.IsDevelopment())
{
    app.UseHttpsRedirection();
}

app.UseDefaultFiles();
app.UseStaticFiles();

app.MapControllers();

app.MapFallbackToFile("index.html");

app.Run();