using AutoMapper;
using Castle.Core.Logging;
using Diligent.WebAPI.Business.MappingProfiles;
using Diligent.WebAPI.Business.Services;
using Diligent.WebAPI.Business.Services.Interfaces;
using Diligent.WebAPI.Contracts.DTOs.Ad;
using Diligent.WebAPI.Contracts.DTOs.Pattern;
using Diligent.WebAPI.Contracts.Exceptions;
using Diligent.WebAPI.Data.Entities;
using Microsoft.AspNetCore.Http;
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 PatternServiceTests
    {
        private readonly IMapper _mapper;
        private readonly List<Pattern> _patterns = new();
        private readonly Pattern _pattern;
        private ISelectionLevelService _selectionLevelService = Substitute.For<ISelectionLevelService>();
        private ILogger<PatternService> _logger = Substitute.For<ILogger<PatternService>>();
        private IEmailer _emailService = Substitute.For<IEmailer>();
        private ISelectionProcessService _selectionProcessService = Substitute.For<ISelectionProcessService>();

        public PatternServiceTests()
        {
            var configuration = new MapperConfiguration(cfg => cfg.AddProfiles(new List<Profile>()
            {
                new PatternMappingProfile(),
                new SelectionLevelMappingProfile(),
                new SelectionProcessMappingProfile(),
                new ApplicantMappingProfile()
            }));
            _mapper = new Mapper(configuration);

            _pattern = new Pattern
            {
                Id = 1,
                Title = "Zakazivanje termina",
                CreatedAt = DateTime.Now,
                SelectionLevelId = 2000,
                SelectionLevel = new SelectionLevel
                {
                    Id = 2000,
                    Name = "SelLevel",
                    SelectionProcesses = new List<SelectionProcess>
                        {
                            new SelectionProcess
                            {
                                Id = 1234,
                                Name = "Zakazan termin",
                                Status = "Čeka na zakazivanje",
                                SelectionLevelId = 4321,
                                ApplicantId = 2321,
                                Applicant = new Applicant
                                {
                                    ApplicantId= 2321,
                                    FirstName = "Ermin",
                                    LastName = "Bronja",
                                    Position = "Developer",
                                    DateOfApplication = DateTime.Now,
                                    CV = "",
                                    Email = "ermin.bronja@dilig.net",
                                    PhoneNumber = "",
                                    LinkedlnLink = "",
                                    GithubLink = "",
                                    BitBucketLink = "",
                                    Experience = 1,
                                    ApplicationChannel = "",
                                    TypeOfEmployment = Applicant.TypesOfEmployment.Posao,
                                    Gender = Applicant.Genders.M,
                                    ProfessionalQualification = "Elektrotehnicki fakultet"
                                },
                                Comment = "Komentar"
                            }
                        }
                },
                Message = "Poruka"
            };

            _patterns.Add(_pattern);
        }

        [Fact]
        public async Task GetAll_ShouldReturnListOfPatterns_WhenCalled()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            var result = await patternService.GetAllAsync();

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

        [Fact]
        public async Task GetById_ShouldReturnPattern_WhenAdExists()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            var result = await patternService.GetByIdAsync(1);

            result.Should().BeEquivalentTo(_mapper.Map<PatternResponseDto>(_pattern));
        }

        [Fact]
        public async Task GetById_ShouldThrowEntityNotFoundException_WhenPatternDontExists()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

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

        [Fact]
        public async Task GetFilteredPatterns_ShouldReturnListOfPatterns_WhenCalled()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            var result = await patternService.GetFilteredPatternsAsync(new FilterPatternDto
            {
                FromDate = new DateTime(2022, 11, 30),
                ToDate = DateTime.Now,
                SelectionLevels = null
            });

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

        [Fact]
        public async Task GetCorrespondingPatternApplicants_ShouldReturnListOfApplicants_WhenCalled()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            var result = await patternService.GetCorrespondingPatternApplicants(1);

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

        [Fact]
        public async Task GetCorrespondingPatternApplicants_ShouldThrowEntityNotFoundException_WhenPatternDontExists()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await patternService.GetCorrespondingPatternApplicants(2));
        }

        [Fact]
        public async Task CreatePattern_ShouldThrowEntityNotFoundException_WhenPatternExist()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await patternService.CreateAsync(new PatternCreateDto
            {
                Title = "Zakazivanje termina",
                CreatedAt = DateTime.Now,
                SelectionLevelId = 2000,
                Message = "Poruka",
            }));
        }

        [Fact]
        public async Task CreatePattern_ShouldThrowEntityNotFoundException_WhenSelectionLevelIsNull()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await patternService.CreateAsync(new PatternCreateDto
            {
                Title = "Zakazan termin",
                CreatedAt = DateTime.Now,
                SelectionLevelId = 2323,
                Message = "Poruka",
            }));
        }

        [Fact]
        public async Task CreatePattern_ShouldCreatePattern_WhenConditionsAreFullfiled()
        {
            _selectionLevelService.GetByIdEntity(Arg.Any<int>()).Returns(new SelectionLevel
            {
                Id = 1122,
                Name = "Test",
                SelectionProcesses = new List<SelectionProcess>()
            });
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await patternService.CreateAsync(new PatternCreateDto
            {
                Title = "Zakazan termin",
                CreatedAt = DateTime.Now,
                SelectionLevelId = 1122,
                Message = "Poruka",
            });

            var result = await patternService.GetAllAsync();

            Assert.Equal(2, result.Count);
        }

        [Fact]
        public async Task ScheduleInterview_ShouldThrowEntityNotFoundException_WhenWhenPatternDoesNotExist()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await patternService.ScheduleIntrviewAsync(new ScheduleInterviewDto
            {
                Emails = new List<string>
                {
                    "ermin.bronja@dilig.net"
                },
                PatternId = 2
            }));
        }

        [Fact]
        public async Task ScheduleInterview_ShouldScheduleInterview_WhenConditionsAreFullfiled()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            var result = await patternService.ScheduleIntrviewAsync(new ScheduleInterviewDto
            {
                Emails = new List<string>
                {
                    "ermin.bronja@dilig.net"
                },
                PatternId = 1
            });

            Assert.Equal(null, result);
        }

        [Fact]
        public async Task ScheduleInterview_ShouldReturnListOfNotSentEmails_WhenEmailsDontExistOrStatusAreNotCorrectInProcesses()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            var result = await patternService.ScheduleIntrviewAsync(new ScheduleInterviewDto
            {
                Emails = new List<string>
                {
                    "meris.ahmatovic@dilig.net"
                },
                PatternId = 1
            });

            Assert.NotEqual(null, result);
        }

        [Fact]
        public async Task UpdatePattern_ShouldThrowEntityNotFoundException_WhenWhenPatternDoesNotExist()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await patternService.UpdateAsync(new PatternUpdateDto
            {
                CreatedAt = DateTime.Now,
                Message = "Poruka 1",
                SelectionLevelId = 2000,
                Title = "Naslov"
            }, 2));
        }

        [Fact]
        public async Task UpdatePattern_ShouldThrowEntityNotFoundException_WhenTitleAndPatternSelectionLevelAreNotChanged()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await patternService.UpdateAsync(new PatternUpdateDto
            {
                CreatedAt = DateTime.Now,
                Message = "Poruka 1",
                SelectionLevelId = 2000,
                Title = "Zakazivanje termina"
            }, 1));
        }

        [Fact]
        public async Task UpdatePattern_ShouldThrowEntityNotFoundException_WhenSelectionLevelDoesNotExistInDatabase()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await patternService.UpdateAsync(new PatternUpdateDto
            {
                CreatedAt = DateTime.Now,
                Message = "Poruka 1",
                SelectionLevelId = 2001,
                Title = "Zakazan Termin"
            }, 1));
        }

        [Fact]
        public async Task UpdatePattern_ShouldUpdatePattern_WhenConditionsAreFullfiled()
        {
            _selectionLevelService.GetByIdEntity(Arg.Any<int>()).Returns(new SelectionLevel
            {
                Id = 1,
                Name = "Test 1",
                SelectionProcesses = new List<SelectionProcess>()
            });
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            var updatePatternDto = new PatternUpdateDto
            {
                CreatedAt = DateTime.Now,
                Message = "Message",
                SelectionLevelId = 1122,
                Title = "Zakazan termin"
            };

            await patternService.UpdateAsync(updatePatternDto, 1);

            var result = await patternService.GetAllAsync();

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

        [Fact]
        public async Task DeletePattern_ShouldThrowEntityNotFoundException_WhenPatternDoesNotExist()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await Assert.ThrowsAsync<EntityNotFoundException>(async () => await patternService.DeleteAsync(2));
        }

        [Fact]
        public async Task DeletePattern_ShouldDeletePattern_WhenPatternExist()
        {
            var databaseContext = await Helpers<Pattern>.GetDatabaseContext(_patterns);
            PatternService patternService = new(databaseContext, _mapper, _selectionLevelService, _logger, _emailService, _selectionProcessService);

            await patternService.DeleteAsync(1);

            var result = await patternService.GetAllAsync();

            Assert.Equal(0, result.Count);
        }
    }
}