using AutoMapper;
using Castle.Core.Logging;
using Diligent.WebAPI.Business.MappingProfiles;
using Diligent.WebAPI.Business.Services;
using Diligent.WebAPI.Contracts.DTOs.Technology;
using Diligent.WebAPI.Contracts.Exceptions;
using Diligent.WebAPI.Data.Entities;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Diligent.WebAPI.Tests.Services
{
    public class TechnologyServiceTests
    {
        private readonly IMapper _mapper;
        private readonly List<Technology> _technologies = new();
        private readonly Technology _technology;
        private readonly ILogger<TechnologyService> _logger = Substitute.For<ILogger<TechnologyService>>();

        public TechnologyServiceTests()
        {
            var configuration = new MapperConfiguration(cfg => cfg.AddProfiles(
                new List<Profile>
            {
                new TechnologyMappingProfile()
            }));
            _mapper = new Mapper(configuration);

            _technology = new Technology
            {
                TechnologyId = 1,
                Name = ".NET",
                TechnologyType = TechnologyTypes.Backend
            };

            _technologies.Add(_technology);
        }

        [Fact]
        public async Task GetAll_ShouldReturnListOfTechnologies_Always()
        {
            var databaseContext = await Helpers<Technology>.GetDatabaseContext(_technologies);
            TechnologyService tehnologyService = new(_mapper, databaseContext, _logger);

            var result = await tehnologyService.GetAllAsync();

            Assert.Equal(result.Count, 1);
        }

        [Fact]
        public async Task GetById_ShouldReturnTechnology_WhenTechnologyExists()
        {
            var databaseContext = await Helpers<Technology>.GetDatabaseContext(_technologies);
            TechnologyService tehnologyService = new(_mapper, databaseContext, _logger);

            var result = await tehnologyService.GetByIdAsync(1);

            result.Should().BeEquivalentTo(_mapper.Map<TechnologyResponseDto>(_technology));
        }

        [Fact]
        public async Task GetById_ShouldThrowEntityNotFoundException_WhenTechnologyDoesNotExists()
        {
            var databaseContext = await Helpers<Technology>.GetDatabaseContext(_technologies);
            TechnologyService tehnologyService = new(_mapper, databaseContext, _logger);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await tehnologyService.GetByIdAsync(1000));
        }

        [Fact]
        public async Task GetEntityById_ShouldReturnTechnology_WhenTechnologyExists()
        {
            var databaseContext = await Helpers<Technology>.GetDatabaseContext(_technologies);
            TechnologyService tehnologyService = new(_mapper, databaseContext, _logger);

            var result = await tehnologyService.GetEntityByIdAsync(1);

            result.Should().BeEquivalentTo(_technology);
        }

        [Fact]
        public async Task GetEntityById_ShouldThrowEntityNotFoundException_WhenTechnologyDoesNotExists()
        {
            var databaseContext = await Helpers<Technology>.GetDatabaseContext(_technologies);
            TechnologyService tehnologyService = new(_mapper, databaseContext, _logger);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await tehnologyService.GetEntityByIdAsync(1000));
        }
    }
}