using System.Collections.Generic;
using System.Threading.Tasks;
using LCU.API.Internal.Operations.IncentiveApi.Exceptions;
using LCU.API.Internal.Operations.IncentiveApi.Services.DuplicateDetection;
using LCU.API.Internal.Operations.IncentiveApiLib.Repositories;
using LCU.Library.Internal.IncentiveApiModels.Entities;
using LCU.Library.Internal.IncentiveApiModels.Enums;
using Moq;
using NUnit.Framework;

namespace Application.UnitTests.Services.DuplicateDetection
{
    public class DuplicateDetectionServiceTest
    {
        private IDuplicateDetectionService _service;
        IActivityRepository _activityRepository;
        private IDuplicateDetectionStrategy _strategy;

        [SetUp]
        public void Setup()
        {
            _activityRepository = Mock.Of<IActivityRepository>();
            _strategy = Mock.Of<IDuplicateDetectionStrategy>();
            var strategies = new List<IDuplicateDetectionStrategy>()
            {
                _strategy
            };
            _service = new DuplicateDetectionService(strategies, _activityRepository);
        }

        [Test]
        public async Task AllTypesCoveredOnce()
        {
            var activity = new Activity()
            {
                Id = 1,
                Type = ActivityType.Other,
                Product = Product.Mortgage,
                State = ActivityState.Accepted
            };
            var duplicates = new List<Activity>() { activity };
            Mock.Get(_strategy).Setup(x => x.CanDecideActivity(It.IsAny<Activity>())).Returns(true);
            Mock.Get(_strategy).Setup(x => x.FindDuplicates(It.IsAny<Activity>())).ReturnsAsync(duplicates);

            var results = await _service.TryFindDuplicates(activity);
            Assert.NotNull(results);
            Assert.IsNotEmpty(results);

            Mock.Get(_strategy).Verify(x => x.CanDecideActivity(It.IsAny<Activity>()), Times.Once);
            Mock.Get(_strategy).Verify(x => x.FindDuplicates(It.IsAny<Activity>()), Times.Once);
        }

        [Test]
        public void ThrowsWithoutStrategy()
        {
            var activity = new Activity()
            {
                Id = 1,
                Type = ActivityType.Other,
                Product = Product.Mortgage,
                State = ActivityState.Accepted
            };
            var strategies = new List<IDuplicateDetectionStrategy>();
            var service = new DuplicateDetectionService(strategies, _activityRepository);
            Assert.ThrowsAsync<NoAvailableStrategy>(async () =>
            {
               await service.TryFindDuplicates(activity);
            });
        }
    }
}