using AS1024.NetworkQuality.Server;
using System.Text.Json;
const string schemeNetQuality = "https";
var builder = WebApplication.CreateSlimBuilder(args);

builder.WebHost.ConfigureKestrel(options => {
    options.Limits.MaxRequestBodySize = long.MaxValue;
}).UseKestrelHttpsConfiguration();

builder.Services.AddLogging();
builder.Logging.AddConsole();

var app = builder.Build();

app.MapGet("/api/v1/config", (HttpRequest request) =>
{
    string host = request.Host.Host;
    int port = request.Host.Port ?? 443;
    Uri smallDownloadUrl = new UriBuilder
    {
        Scheme = schemeNetQuality,
        Host = host,
        Port = port,
        Path = "/api/v1/small"
    }.Uri;

    Uri largeDownloadUrl = new UriBuilder
    {
        Scheme = schemeNetQuality,
        Host = host,
        Port = port,
        Path = "/api/v1/large"
    }.Uri;

    Uri uploadUrl = new UriBuilder
    {
        Scheme = schemeNetQuality,
        Host = host,
        Port = port,
        Path = "/api/v1/upload"
    }.Uri;

    ConfigResponse config = new()
    {
        Urls = new Urls
        {
            SmallDownloadUrl = smallDownloadUrl.AbsoluteUri,
            LargeDownloadUrl = largeDownloadUrl.AbsoluteUri,
            UploadUrl = uploadUrl.AbsoluteUri
        }
    };

    return Results.Json(config, AppJsonSerializerContext.Default);
});

app.MapGet("/api/v1/small", (HttpResponse response, ILogger<Program> logger) =>
{
    response.ContentType = "application/octet-stream";
    return Results.Ok();
});

app.MapGet("/api/v1/large", async (HttpRequest request, HttpResponse response, ILogger<Program> logger) =>
{
    response.ContentType = "application/octet-stream";

    try
    {
        var largeStream = new LargeStreamResult();
        await largeStream.CopyToAsync(response.Body);
    }
    catch (IOException ex)
    {
        logger.LogError(ex, "An error occurred while writing the large file content.");
        response.StatusCode = 500;
        await response.WriteAsync("An error occurred while writing the large file content.");
    }
    catch (Exception ex)
    {
        logger.LogError(ex, "An unexpected error occurred.");
        response.StatusCode = 500;
        await response.WriteAsync("An unexpected error occurred.");
    }
});

app.MapPost("/api/v1/upload", (HttpRequest request, ILogger<Program> logger) =>
{
    try
    {
        return Results.Ok();
    }
    catch (IOException ex)
    {
        logger.LogError(ex, "An error occurred while reading the request body.");
        return Results.Problem("An error occurred while reading the request body.", statusCode: 500);
    }
    catch (Exception ex)
    {
        logger.LogError(ex, "An unexpected error occurred.");
        return Results.Problem("An unexpected error occurred.", statusCode: 500);
    }
});

app.Run();