using System;
using System.Collections.Generic;
using System.Linq;
using Deltares.Dam.Data;
using Deltares.Dam.Forms;
using NUnit.Framework;

namespace Deltares.Dam.Tests
{
    public class DamContextTest
    {
        private DamContext context;
        private Type knownType = typeof(Scenario);

        [SetUp]
        public void SetUp()
        {
            context = new DamContext();
        }

        [Test]
        public void DamContext_GetColumnNamedFiltersOfKnownType_ReturnListOfKnownNamedFilters()
        {
            // setup
            // call
            var result = context.GetColumnNamedFilters(knownType);

            // assert
            Assert.NotNull(result);
            foreach (var knownFilter in result)
            {
                Assert.NotNull(context.GetFilteredColumns(knownType, knownFilter));
            }
        }

        [Test]
        public void DamContext_GetColumNamedFiltersOfUnknownType_ReturnsNull()
        {
            // setup
            // call
            var result = context.GetColumnNamedFilters(GetType());

            // assert
            Assert.IsNull(result);
        }

        [Test]
        public void DamContext_GetNamedFiltersOfKnownTypeUnknownFilter_ReturnsNull()
        {
            // setup
            var unknownNamedFilter = "UnknownNamedFilter";
            var namedFilters = context.GetColumnNamedFilters(knownType);
            CollectionAssert.DoesNotContain(namedFilters,unknownNamedFilter);

            // call
            var result = context.GetFilteredColumns(knownType, unknownNamedFilter);

            // assert
            Assert.IsNull(result);
        }

        [Test]
        public void DamContext_GetNamedFiltersOfUnknownTypeRandomFilter_ReturnsNull()
        {
            // setup
            var randomNamedFilter = "RandomNamedFilter";

            // call
            var result = context.GetFilteredColumns(GetType(), randomNamedFilter);

            // assert
            Assert.IsNull(result);
        }

        [Test]
        public void DamContext_GetNamedFiltersOfKnownTypeKnownFilter_ReturnsListOfPropertyNamesInType()
        {
            // setup
            var namedFilters = context.GetColumnNamedFilters(knownType);
            var knownNamedFilter = namedFilters.First();

            // call
            var result = context.GetFilteredColumns(knownType, knownNamedFilter);

            // assert
            Assert.IsNotNull(result);
            foreach (var propertyName in result)
            {
                Assert.IsNotEmpty(knownType.GetMember(propertyName));
            }
        }
        
        
    }
}