using AutoMapper;
using Diligent.WebAPI.Business.MappingProfiles;
using Diligent.WebAPI.Business.Services;
using Diligent.WebAPI.Contracts.DTOs.Ad;
using Diligent.WebAPI.Contracts.DTOs.Applicant;
using Diligent.WebAPI.Contracts.Exceptions;
using Diligent.WebAPI.Data.Entities;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;

namespace Diligent.WebAPI.Tests.Services
{
    public class ApplicantServiceTests
    {
        private readonly IMapper _mapper;
        private ILogger<ApplicantService> _logger = Substitute.For<ILogger<ApplicantService>>();
        private readonly IUserService _userService = Substitute.For<IUserService>();
        private readonly IFileService _fileService = Substitute.For<IFileService>();
        private readonly IAdService _adService = Substitute.For<IAdService>();
        private readonly List<Applicant> _applicants;
        private readonly List<Ad> _ads;
        private readonly List<User> _users;
        public ApplicantServiceTests()
        {
            // mock data
            _applicants = MockData.GetListOfApplicants();
            _ads = MockData.GetListOfAds();
            _users = MockData.GetListOfUsers();

            // configure mapper
            var configuration = new MapperConfiguration(cfg => cfg.AddProfiles(
                new List<Profile>
            {
                new ApplicantMappingProfile(),
                new AdMappingProfile(),
                new SelectionProcessMappingProfile()
            }));
            _mapper = new Mapper(configuration);
        }

        [Fact]
        public async Task GetFilteredApplicants_ShouldReturnOneApplicant_Always()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);

            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            var filterDto = new ApplicantFilterDto
            {
                MinExperience = 2,
                MaxExperience = 4
            };

            var result = await applicantService.GetFilteredApplicants(filterDto);

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


        [Fact]
        public async Task GetAllAdsApplicants_ShouldReturnAllApplicants_Always()
        {
            var databaseContext = await Helpers<Ad>.GetDatabaseContext(_ads);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            var filterDto = MockData.GetApplicantFilters();

            var result = await applicantService.GetAllAdsApplicants(filterDto);

            result.Should().BeEquivalentTo(_mapper.Map<List<AdApplicantsViewDto>>(_ads));
        }

        [Fact]
        public async Task GetById_ShouldReturnApplicant_WhenApplicantExist()
        {
            var fileInBase64Format = "some string";
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);
            _fileService.GetCV(Arg.Any<string>()).Returns(fileInBase64Format);

            var result = await applicantService.GetById(1);
            _applicants[0].CV = fileInBase64Format;

            result.Should().BeEquivalentTo(_mapper.Map<ApplicantViewDto>(_applicants[0]));
        }

        [Fact]
        public async Task GetById_ShouldThrowEntityNotFoundException_WhenApplicantDoesNotExist()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await applicantService.GetById(1000));
        }

        [Fact]
        public async Task GetApplicantWithSelectionProcessesById_ShouldReturnApplicant_WhenApplicantExists()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            var result = await applicantService.GetApplicantWithSelectionProcessesById(1);
            var processes = result.SelectionProcesses;

            processes.Should().HaveCount(3);
            result.Should().BeEquivalentTo(_mapper.Map<ApplicantViewDto>(_applicants[0]));
        }

        [Fact]
        public async Task GetApplicantWithSelectionProcessesById_ShouldThrowEntityNotFoundException_WhenApplicantDoesNotExist()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await 
            applicantService.GetApplicantWithSelectionProcessesById(1000));
        }

        [Fact]
        public async Task ApplyForAd_ShouldThrowEntityNotFooundException_WhenAdIsNotFound()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);
            ApplyForAdRequestDto applyForAdRequestDto = new()
            {
                AdId = 1,
                BitBucketLink = "",
                CoverLetter = "saddadas",
                DateOfBirth = new DateTime(1980, 10, 10),
                Email = "meris@gmail.com",
                Experience = 3,
                FirstName = "Meris",
                LastName = "Ahmatovic",
                GithubLink = "",
                LinkedinLink = "",
                PdfFile = null,
                PhoneNumber = "32312321",
                TechnologiesIds = new int[] { 1 },
            };
            _fileService.When(x => x.UploadCV(Arg.Any<string>(), Arg.Any<IFormFile>())).Do(x => { });

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await
            applicantService.ApplyForAd(applyForAdRequestDto));
        }

        [Fact]
        public async Task ApplyForAd_ApplicantShouldBeCreated_Always()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);
            ApplyForAdRequestDto applyForAdRequestDto = new()
            {
                AdId = 1,
                BitBucketLink = "",
                CoverLetter = "saddadas",
                DateOfBirth = new DateTime(1980, 10, 10),
                Email = "meris@gmail.com",
                Experience = 3,
                FirstName = "Meris",
                LastName = "Ahmatovic",
                GithubLink = "",
                LinkedinLink = "",
                PdfFile = null,
                PhoneNumber = "32312321",
                TechnologiesIds = new int[] { 1 },
            };
            _fileService.When(x => x.UploadCV(Arg.Any<string>(), Arg.Any<IFormFile>())).Do(x => { });
            _adService.GetByIdEntityAsync(Arg.Any<int>()).Returns(new Ad
            {
                Id = 10,
                Applicants = new List<Applicant>(),
                CreatedAt = DateTime.Now,
                ExpiredAt = DateTime.Now.AddDays(5),
                MinimumExperience = 1,
                Title = ".NET Intern",
                KeyResponsibilities = "dasdadas",
                Offer = "dsadsada",
                Requirements = "dsadsadas"
            });
            await applicantService.ApplyForAd(applyForAdRequestDto);

            var filterDto = MockData.GetApplicantFilters();
            var result = await applicantService.GetFilteredApplicants(filterDto);

            Assert.Equal(3, result.Total);
        }

        [Fact]
        public async Task DeleteApplicant_ShouldDeleteApplicant_WhenApplicantExist()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            await applicantService.DeleteApplicant(1);

            var filterDto = MockData.GetApplicantFilters();

            var applicants = await applicantService.GetFilteredApplicants(filterDto);

            Assert.Equal(1,applicants.Total);
        }

        [Fact]
        public async Task DeleteApplicant_ShouldThrowEntityNotFooundException_WhenApplicantDoesNotExist()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await applicantService.DeleteApplicant(1000));
        }

        [Fact]
        public async Task GetOptions_ShouldReturnAllOptions_Always()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            var res = await applicantService.GetOptions();
            Assert.Equal(2, res.Count);
        }

        [Fact]
        public async Task InitializeProcess_ShouldReturnError_WhenApplicantDoesNotExist()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);
            var res = await applicantService.InitializeProcess(new ApplicantProcessRequestDTO
            {
                ApplicantId = 1000,
                Appointment = DateTime.Now,
                SchedulerId = 1000
            });

            Assert.True(res.IsError);
        }

        [Fact]
        public async Task InitializeProcess_SelectionProcessShouldBeCreated_WhenApplicantExist()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);
           
            var res = await applicantService.InitializeProcess(new ApplicantProcessRequestDTO
            {
                ApplicantId = 1,
                Appointment = DateTime.Now,
                SchedulerId = 1
            });

            // before creating new selection process total number of selection proceesses was 6
            Assert.Equal(7, databaseContext.SelectionProcesses.Count());
            Assert.False(res.IsError);
        }

        [Fact]
        public async Task ImportApplicant_ShouldCreateApplicant_Always()
        {
            var databaseContext = await Helpers<Applicant>.GetDatabaseContext(_applicants);
            _userService.GetFirst().Returns(_users[0]);
            ApplicantService applicantService = new(databaseContext, _mapper, _logger, _userService, _fileService, _adService);

            var ad = new Ad
            {
                Id = 2,
                Applicants = _applicants,
                CreatedAt = DateTime.Now,
                ExpiredAt = DateTime.Now.AddDays(5),
                MinimumExperience = 1,
                Title = ".NET Intern",
                KeyResponsibilities = "dasdadas",
                Offer = "dsadsada",
                Requirements = "dsadsadas"
            };

            await applicantService.ImportApplicant(new List<ApplicantImportDto>
            {
                new ApplicantImportDto
                {
                    Ad = ad,
                    ApplicationChannel = "Facebook",
                    BitBucketLink = "",
                    Comment = "some comment",
                    CV = "name of CV",
                    DateOfApplication = DateTime.Now,
                    Email = "somemail@gmail.com",
                    Experience = 3,
                    FirstName = "Dzenis",
                    LastName = "Hadzifejzovic",
                    GithubLink = "",
                    LinkedlnLink = "",
                    PhoneNumber = "2321312",
                    Position = "some position",
                    TypeOfEmployment = "Intership"
                }
            });

            Assert.Equal(3, databaseContext.Applicants.Count());
          
        }

    }
}