using Autofac;
using Serilog;
using Serilog.Core;
using Xunit.Abstractions;

namespace Nitride.Tests
{
    /// <summary>
    /// Common initialization logic for Nitride-based tests including setting
    /// up containers, logging, and Serilog.
    /// </summary>
    public abstract class NitrideTestsBase
    {
        private readonly ITestOutputHelper output;

        public NitrideTestsBase(ITestOutputHelper output)
        {
            this.output = output;

            // Set up logging.
            const string Template =
                "[{Level:u3}] "
                + "({SourceContext}) {Message}"
                + "{NewLine}{Exception}";

            this.Logger = new LoggerConfiguration()
                .WriteTo.TestOutput(
                    output,
                    outputTemplate: Template)
                .CreateLogger();

            // Set up Autofac.
            var builder = new ContainerBuilder();

            builder.RegisterInstance(this.Logger)
                .As<ILogger>()
                .SingleInstance();
            builder.RegisterModule<NitrideModule>();

            this.ConfigureContainer(builder);

            this.Container = builder.Build();
        }

        /// <summary>
        /// Contains the Autofac container for this test.
        /// </summary>
        protected IContainer Container { get; }

        /// <summary>
        /// Gets the logger used to report messages about the test.
        /// </summary>
        protected Logger Logger { get; }

        /// <summary>
        /// Configures the Autofac container for this test instance.
        /// </summary>
        /// <param name="builder"></param>
        protected virtual void ConfigureContainer(ContainerBuilder builder)
        {
        }
    }
}