using System;
using System.Diagnostics;
using Autofac;
using Core.ModuleRegistry;
using Microsoft.ApplicationInsights;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace Tests
{
    /// <summary>
    /// Act as base class for tests. Avoids duplication of test setup code
    /// </summary>
    [TestClass]
    public abstract partial class TestFixture
    {
        protected IContainer Container { get; private set; }
        protected ContainerBuilder ContainerBuilder { get; private set; }


        [AssemblyInitialize]
        public static void AssemblySetup(TestContext tc)
        {
            Trace.Listeners.Add(new TextWriterTraceListener(Console.Out));

            var envConfiguration = new ConfigurationBuilder()
                .AddEnvironmentVariables()
                .Build();

        }

        public virtual IConfigurationRoot Configuration()
        {

            IConfigurationBuilder configBuilder = Core.Configurations.AzureConfigurationManager.AppConfigBuilder("appsettings.dev.json");
            IConfigurationRoot configuration = configBuilder.Build();

            return configuration;
        }

        /// <summary>
        /// Should not be overriden. Rather override PreArrangeAll to setup data needed for a test class.
        /// Override PrebuildContainer with a method that does nothing to prevent early build of IOC container 
        /// </summary>
        [TestInitialize]
        public void Setup()
        {
            CreateContainerBuilder();
            Container = ContainerBuilder.Build();
            Insight.Database.Providers.PostgreSQL.PostgreSQLInsightDbProvider.RegisterProvider();
        }


        protected virtual void CreateContainerBuilder()
        {
            IConfigurationRoot configuration = Configuration();

            var builder = new ContainerBuilder();
            builder.RegisterInstance(new LoggerFactory())
                .As<ILoggerFactory>();

            builder.RegisterGeneric(typeof(Logger<>))
                    .As(typeof(ILogger<>))
                    .SingleInstance();

            builder.RegisterModule(new Core.ModuleRegistry.DbPostgreSqlModule
            {
                ConnectionString = configuration.GetConnectionString("ptdb")
            });

            builder.RegisterModule(new Core.ModuleRegistry.TelemetryModule
            {
                TelemetryConfig = configuration.GetSection("ApplicationInsights").Get<Core.ModuleRegistry.TelemetryConfig>()
            });



            ContainerBuilder = builder;
        }

        [TestCleanup]
        public void CleanUp()
        {
            Trace.Flush();
            var telemetryClient = Container.Resolve<TelemetryClient>();
            telemetryClient.Flush();

            if (Container != null)
            {
                Container.Dispose();
                Container = null;
            }
        }

    }
}