using Serilog.Events;
using System.Diagnostics.CodeAnalysis;

namespace MyWarehouse.WebApi.Logging.Helper;

[ExcludeFromCodeCoverage]
internal static class LogHelper
{
    /// <summary>
    /// Replacement of the default implementation of RequestLoggingOptions.GetLevel.
    /// Excludes health check endpoints from logging by decreasing their log level.
    /// </summary>
    public static LogEventLevel ExcludeHealthChecks(HttpContext ctx, double _, Exception ex) =>
        ex != null
            ? LogEventLevel.Error
            : ctx.Response.StatusCode > 499
                ? LogEventLevel.Error
                : IsHealthCheckEndpoint(ctx) // Not an error, check if it was a health check
                    ? LogEventLevel.Verbose // Was a health check, use Verbose
                    : LogEventLevel.Information;

    private static bool IsHealthCheckEndpoint(HttpContext ctx)
    {
        var endpoint = ctx.GetEndpoint();
        if (endpoint is object)
        {
            return string.Equals(
                endpoint.DisplayName,
                "Health checks",
                StringComparison.Ordinal);
        }
        // No endpoint, so not a health check endpoint
        return false;
    }
}