using System.Collections.Generic;
using LCU.API.Collections.RepoApi.Services;
using LCU.Shared.Collections.RepoApiLib.Models;
using LCU.Shared.Collections.RepoApiLib.Repositories;
using Moq;
using Xunit;

namespace LCU.API.Collections.RepoApiTests.Services
{
    public class SavedLocationServiceTest
    {
        [Fact]
        public async void ListAll_Ok()
        {
            var mockLocation = getMockLocation();
            var savedLocationService = getSavedLocationService();

            var result = await savedLocationService.ListAllAsync();
            var locationEnumerator = result.GetEnumerator();

            locationEnumerator.MoveNext();
            var firstLocationFromService = locationEnumerator.Current;
            Assert.Equal(mockLocation.ID, firstLocationFromService.ID);
            Assert.Equal(mockLocation.Name, firstLocationFromService.Name);
        }

        [Fact]
        public async void GetOne_Ok()
        {
            var mockLocation = getMockLocation();
            var savedLocationService = getSavedLocationService();

            var result = await savedLocationService.GetAsync(1);
            Assert.Equal(mockLocation.ID, result.ID);
            Assert.Equal(mockLocation.Name, result.Name);
        }

        [Fact]
        public async void Update_Ok()
        {
            var mockLocation = getMockLocation();
            var savedLocationService = getSavedLocationService();

            var oldId = mockLocation.ID;
            mockLocation.ID = 2;
            mockLocation.Name = "New Name";

            var result = await savedLocationService.UpdateAsync(mockLocation);
            Assert.Equal(mockLocation.Name, result.Name);
            Assert.Equal(oldId, result.ID);
        }

        private SavedLocationService getSavedLocationService()
        {
            var savedLocations = getMockLocationList();

            var mockRepository = new Mock<ISavedLocationRepository>();
            var mockUnitOfWork = new Mock<IUnitOfWork>();

            mockRepository.Setup(repo => repo.ListAsync()).ReturnsAsync(savedLocations);
            mockRepository.Setup(repo => repo.FindByIdAsync(It.IsAny<int>())).ReturnsAsync(savedLocations[0]);
            mockRepository.Setup(repo => repo.Update(It.IsAny<SavedLocation>()));

            return new SavedLocationService(mockRepository.Object, mockUnitOfWork.Object);
        }

        private IList<SavedLocation> getMockLocationList()
        {
            return new List<SavedLocation>
            {
                getMockLocation()
            };
        }

        private SavedLocation getMockLocation()
        {
            return new SavedLocation() {ID = 1, Name = "Some Weird Storage Place"};
        }
    }
}