using NSubstitute;
using NUnit.Framework;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DASFactoryDb.Tests
{
    [TestFixture]
    class DbWrapperShould
    {
        DbWrapper sut;

        [SetUp]
        public void SetUp()
        {
            //Arrange
            sut = DbWrapper.Connection;
        }

        [TearDown]
        public void TearDown()
        {
            sut.ResetLocalDASFactoryConnection();
        }

        [Test]
        public void UserName_ShouldSetAndGet()
        {
            //Act
            sut.Username = "Name";
            var result = sut.Username;

            //Assert
            Assert.That(result, Is.EqualTo("Name"));
        }

        [Test]
        public void Password_ShouldSetAndGet()
        {
            //Act
            sut.Password = "Pass";
            var result = sut.Password;

            //Assert
            Assert.That(result, Is.EqualTo("Pass"));
        }

        [Test]
        public void DBName_ShouldSetAndGet()
        {
            //Act
            sut.DBName = "DataPro";
            var result = sut.DBName;

            //Assert
            Assert.That(result, Is.EqualTo("DataPro"));
        }

        [Test]
        public void Server_ShouldSetAndGet()
        {
            //Act
            sut.Server = "localdb\\DataProInstance";
            var result = sut.Server;

            //Assert
            Assert.That(result, Is.EqualTo("localdb\\DataProInstance"));
        }

        [Test]
        public void GetLocalDASFactoryConnectionString_NullServer_ShouldThrowException()
        {
            //Arrange
            sut.Server = null;

            //Act & Assert 
            Assert.That(DbWrapper._usingNTLMAuthentication, Is.EqualTo(true));

            Assert.That(
            () => sut.GetLocalDASFactoryConnectionString()
            , Throws.TypeOf<Exception>()
           .With
           .Property("Message")
           .EqualTo("Empty Server"));
        }


        [Test]
        public void GetLocalDASFactoryConnectionString_DefaultState()
        {
            //Arrange 
            sut.Server = "MyServer";

            //Act
            var result = sut.GetLocalDASFactoryConnectionString();

            //Assert
            Assert.That(DbWrapper._usingNTLMAuthentication, Is.EqualTo(true));
            Assert.That(result, Is.EqualTo("Server=MyServer;Database=DASFactory;Trusted_Connection=TRUE;"));
        }

        [Test]
        public void GetLocalDASFactoryConnectionString_ServerHasValue()
        {
            //Arrange
            sut.Server = "TestServer";

            //Act
            var result = sut.GetLocalDASFactoryConnectionString();

            //Assert
            // Assert.That(sut.UsingNTLMAuthentication , Is.EqualTo(true));
            Assert.That(DbWrapper._usingNTLMAuthentication, Is.EqualTo(true));
            Assert.That(result, Is.EqualTo("Server=TestServer;Database=DASFactory;Trusted_Connection=TRUE;"));
        }

        [Test]
        public void GetLocalDASFactoryConnectionString_ServerHasValueAndFalseUsingNTLMAuthentication()
        {
            //Arrange
            sut.Server = "TestServer";
            DbWrapper._usingNTLMAuthentication = false;

            //Act
            var result = sut.GetLocalDASFactoryConnectionString();

            //Assert
            Assert.That(result, Is.EqualTo("Server=TestServer;Database=DASFactory;User Id=;Password=;"));
        }

        [Test]
        public void GetLocalDASFactoryConnectionString_ServerHasValueAndFalseUsingNTLMAuthentication_SwitchToTrueUsingNTLMAuthentication()
        {
            //Arrange
            sut.Server = "TestServer";
            DbWrapper._usingNTLMAuthentication = false;

            //Act
            var result = sut.GetLocalDASFactoryConnectionString();

            //Assert
            Assert.That(result, Is.EqualTo("Server=TestServer;Database=DASFactory;User Id=;Password=;"));

            //Arrange
            //Important to reset the connection otherwise the class needs to be redesgined to not be singleton
            sut.ResetLocalDASFactoryConnection();

            //Act
            result = sut.GetLocalDASFactoryConnectionString();

            //Assert
            Assert.That(result, Is.EqualTo("Server=TestServer;Database=DASFactory;Trusted_Connection=TRUE;"));
        }

        [Ignore("Not testing DAL")]
        [Test]
        public void GetDASFactoryCommand_ShouldBeOpened()
        {
            //Arrange
            string connectionString = "Server=TestServer;Database=DASFactory;Trusted_Connection=TRUE;";

            System.Data.IDbCommand dbCommand = Substitute.For<System.Data.IDbCommand>();
            System.Data.IDbConnection dbConnection = Substitute.For<System.Data.IDbConnection>();
            dbConnection.ConnectionString = connectionString;
            dbConnection.State.Returns(System.Data.ConnectionState.Open);

            //Act
            System.Data.IDbCommand result = null;
            //Uncomment if decided to unit test the Data Access Layer
            //result = DbWrapper.GetDASFactoryCommand(dbCommand, dbConnection);
            Assert.That(result, Is.Not.Null);

            var state = result.Connection.State;

            //Assert
            Assert.That(result.Connection.State, Is.EqualTo(System.Data.ConnectionState.Open));
            Assert.That(result.Connection.ConnectionString, Is.Not.Empty.And.EqualTo(connectionString));
        }

        [Test]
        public void GetDeviceId_ShouldThrowException_WhenNotConnected()
        {
            //Arrange
            DbWrapper.Connected = false;

            //Act & Assert
            Assert.That(
                () => DbWrapper.GetDeviceId("SOMESERIAL")
                , Throws.TypeOf<Exception>()
           .With
           .Property("Message")
           .EqualTo("Not connected"));
        }

        [Test]
        public void Connection_ShouldBeSameReference()
        {
            Assert.That(DbWrapper.Connection, Is.SameAs(DbWrapper.Connection));
        }
    }
}