using System;
using System.Linq;
using System.Threading.Tasks;
using Octokit.Tests.Helpers;
using Octokit.Tests.Integration.Helpers;
using Xunit;

namespace Octokit.Tests.Integration.Clients
{
    public class OrganizationMembersClientTests
    {
        public class TheGetAllMethod
        {
            private readonly IGitHubClient _gitHub;
            private readonly string _organizationFixture;

            public TheGetAllMethod()
            {
                _gitHub = Helper.GetAuthenticatedClient();
                _organizationFixture = "octokit";
            }

            [OrganizationTest]
            public async Task ReturnsMembers()
            {
                var members = await
                    _gitHub.Organization.Member.GetAll(_organizationFixture);
                Assert.NotEmpty(members);
            }

            [OrganizationTest]
            public async Task ReturnsCorrectCountOfMembersWithoutStart()
            {
                var options = new ApiOptions
                {
                    PageCount = 1,
                    PageSize = 1
                };

                var members = await _gitHub.Organization.Member.GetAll(_organizationFixture, options);

                Assert.Single(members);
            }

            [OrganizationTest]
            public async Task ReturnsCorrectCountOfMembersWithStart()
            {
                var options = new ApiOptions
                {
                    PageCount = 1,
                    PageSize = 1,
                    StartPage = 1
                };

                var members = await _gitHub.Organization.Member.GetAll(_organizationFixture, options);

                Assert.Single(members);
            }

            [OrganizationTest]
            public async Task ReturnsDistinctMembersBasedOnStartPage()
            {
                var startOptions = new ApiOptions
                {
                    PageCount = 1,
                    PageSize = 1,
                    StartPage = 1
                };

                var firstPage = await _gitHub.Organization.Member.GetAll(_organizationFixture, startOptions);

                var skipStartOptions = new ApiOptions
                {
                    PageSize = 1,
                    PageCount = 1,
                    StartPage = 2
                };

                var secondPage = await _gitHub.Organization.Member.GetAll(_organizationFixture, skipStartOptions);

                Assert.Single(firstPage);
                Assert.Single(secondPage);
                Assert.NotEqual(firstPage.First().Id, secondPage.First().Id);
            }

            [IntegrationTest(Skip = "TwoFactor filter can't be used unless the requester is an organization owner")]
            public async Task ReturnsMembersWithFilter()
            {
                var no2FAMembers = await _gitHub.Organization.Member.GetAll(_organizationFixture, OrganizationMembersFilter.TwoFactorAuthenticationDisabled);
                Assert.NotNull(no2FAMembers);
            }

            [IntegrationTest(Skip = "Admin/Member filter doesn't work unless the requester is an organization member")]
            public async Task ReturnsMembersWithRole()
            {
                var adminMembers = await _gitHub.Organization.Member.GetAll(_organizationFixture, OrganizationMembersRole.Admin);
                Assert.NotNull(adminMembers);

                var normalMembers = await _gitHub.Organization.Member.GetAll(_organizationFixture, OrganizationMembersRole.Member);
                Assert.NotNull(normalMembers);

                // There shouldnt be any members that are in both groups if the role filter works correctly
                var membersInBoth = adminMembers.Select(a => a.Id).Intersect(normalMembers.Select(n => n.Id));
                Assert.Empty(membersInBoth);
            }

            [IntegrationTest(Skip = "TwoFactor filter can't be used unless the requester is an organization owner")]
            public async Task ReturnsMembersWthFilterAndRole()
            {
                // Get count of admin/normal members
                var adminCount = (await _gitHub.Organization.Member.GetAll(_organizationFixture, OrganizationMembersRole.Admin)).Count;
                var memberCount = (await _gitHub.Organization.Member.GetAll(_organizationFixture, OrganizationMembersRole.Member)).Count;

                // Ensure that there are less admins with no 2 factor, than there are total admins
                var adminsWithNo2FA = await _gitHub.Organization.Member.GetAll(_organizationFixture, OrganizationMembersFilter.TwoFactorAuthenticationDisabled, OrganizationMembersRole.Admin);
                Assert.NotNull(adminsWithNo2FA);
                Assert.True(adminsWithNo2FA.Count <= adminCount);

                // Ensure that there are less members with no 2 factor, than there are total admins
                var membersWithNo2FA = await _gitHub.Organization.Member.GetAll(_organizationFixture, OrganizationMembersFilter.TwoFactorAuthenticationDisabled, OrganizationMembersRole.Member);
                Assert.NotNull(membersWithNo2FA);
                Assert.True(membersWithNo2FA.Count <= memberCount);
            }
        }

        public class TheGetOrganizationMembershipMethod
        {
            readonly IGitHubClient _gitHub;

            public TheGetOrganizationMembershipMethod()
            {
                _gitHub = Helper.GetAuthenticatedClient();
            }

            [OrganizationTest]
            public async Task ReturnsUsersMembershipOrganizationMembership()
            {
                using (var teamContext = await _gitHub.CreateTeamContext(Helper.Organization, new NewTeam(Helper.MakeNameWithTimestamp("team"))))
                {
                    teamContext.InviteMember("alfhenrik-test-2");

                    var organizationMemberhip = await _gitHub.Organization.Member.GetOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
                    Assert.Equal(MembershipState.Pending, organizationMemberhip.State);
                    Assert.Equal(MembershipRole.Member, organizationMemberhip.Role);
                }
            }
        }

        public class TheAddOrUpdateOrganizationMembershipMethod
        {
            readonly IGitHubClient _gitHub;

            public TheAddOrUpdateOrganizationMembershipMethod()
            {
                _gitHub = Helper.GetAuthenticatedClient();
            }

            [OrganizationTest]
            public async Task ReturnsUsersPendingMemberOrganizationMembership()
            {
                var organizationMembership = await _gitHub.Organization.Member.AddOrUpdateOrganizationMembership(Helper.Organization, "alfhenrik-test-2", new OrganizationMembershipUpdate());
                Assert.Equal(MembershipState.Pending, organizationMembership.State);
                Assert.Equal(MembershipRole.Member, organizationMembership.Role);
                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
            }

            [OrganizationTest]
            public async Task ReturnsUsersPendingAdminOrganizationMembership()
            {
                var organizationMembership = await _gitHub.Organization.Member.AddOrUpdateOrganizationMembership(Helper.Organization, "alfhenrik-test-2", new OrganizationMembershipUpdate { Role = MembershipRole.Admin });
                Assert.Equal(MembershipState.Pending, organizationMembership.State);
                Assert.Equal(MembershipRole.Admin, organizationMembership.Role);
                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
            }
        }

        public class TheCreateOrganizationInvitationMethod
        {
            readonly IGitHubClient _gitHub;

            public TheCreateOrganizationInvitationMethod()
            {
                _gitHub = Helper.GetAuthenticatedClient();
            }

            [OrganizationTest]
            public async Task ReturnsOrganizationMembershipInvitationViaUserId()
            {
                var user = await _gitHub.User.Get("alfhenrik-test-2");
                
                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id);
                var organizationMembershipInvitation = await _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
                
                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
                
                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
            }
            
            [OrganizationTest]
            public async Task ReturnsOrganizationMembershipInvitationViaUserEmail()
            {
                var email = RandomEmailGenerator.GenerateRandomEmail();
                
                var organizationInvitationRequest = new OrganizationInvitationRequest(email);
                var organizationMembershipInvitation = await _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
                
                Assert.Equal(email, organizationMembershipInvitation.Email);
                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);

                await _gitHub.Organization.Member.CancelOrganizationInvitation(Helper.Organization, organizationMembershipInvitation.Id);
            }

            [OrganizationTest]
            public async Task ThrowsApiValidationExceptionForCurrentOrganizationMembers()
            {
                var user = await _gitHub.User.Get(Helper.UserName);
                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id);
                
                await Assert.ThrowsAsync<ApiValidationException>(() => _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest));
            }

            [OrganizationTest]
            public async Task ReturnsOrganizationMembershipInvitationSingleTeam()
            {
                var user = await _gitHub.User.Get("alfhenrik-test-2");

                var team1 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam1"));
                
                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id, new int[] {team1.Id});
                var organizationMembershipInvitation = await _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
                
                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
                Assert.Equal(1, organizationMembershipInvitation.TeamCount);
                
                await _gitHub.Organization.Team.Delete(Helper.Organization, team1.Slug);
                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
            }
            
            [OrganizationTest]
            public async Task ReturnsOrganizationMembershipInvitationMultipleTeams()
            {
                var user = await _gitHub.User.Get("alfhenrik-test-2");

                var team1 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam1"));
                var team2 = await _gitHub.Organization.Team.Create(Helper.Organization, new NewTeam("TestTeam2"));
                
                var organizationInvitationRequest = new OrganizationInvitationRequest(user.Id, new int[] {team1.Id, team2.Id});
                var organizationMembershipInvitation = await _gitHub.Organization.Member.CreateOrganizationInvitation(Helper.Organization, organizationInvitationRequest);
                
                Assert.Equal("alfhenrik-test-2", organizationMembershipInvitation.Login);
                Assert.Equal(OrganizationMembershipRole.DirectMember, organizationMembershipInvitation.Role.Value);
                Assert.Equal(Helper.UserName, organizationMembershipInvitation.Inviter.Login);
                Assert.Equal(2, organizationMembershipInvitation.TeamCount);
                
                await _gitHub.Organization.Team.Delete(Helper.Organization, team1.Slug);
                await _gitHub.Organization.Team.Delete(Helper.Organization, team2.Slug);
                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
            }
        }

        public class TheRemoveOrganizationMembershipMethod
        {
            readonly IGitHubClient _gitHub;

            public TheRemoveOrganizationMembershipMethod()
            {
                _gitHub = Helper.GetAuthenticatedClient();
            }

            [OrganizationTest]
            public async Task RemovesOrganizationMembership()
            {
                await _gitHub.Organization.Member.AddOrUpdateOrganizationMembership(Helper.Organization, "alfhenrik-test-2", new OrganizationMembershipUpdate());
                await _gitHub.Organization.Member.RemoveOrganizationMembership(Helper.Organization, "alfhenrik-test-2");
                await Assert.ThrowsAsync<NotFoundException>(() => _gitHub.Organization.Member.GetOrganizationMembership(Helper.Organization, "alfhenrik-test-2"));
            }
        }

        public class TheGetAllPendingInvitationsMethod
        {
            readonly IGitHubClient _gitHub;

            public TheGetAllPendingInvitationsMethod()
            {
                _gitHub = Helper.GetAuthenticatedClient();
            }

            [OrganizationTest]
            public async Task ReturnsNoPendingInvitations()
            {
                var pendingInvitations = await _gitHub.Organization.Member.GetAllPendingInvitations(Helper.Organization);
                Assert.NotNull(pendingInvitations);
                Assert.Empty(pendingInvitations);
            }

            [OrganizationTest]
            public async Task ReturnsPendingInvitations()
            {
                using (var teamContext = await _gitHub.CreateTeamContext(Helper.Organization, new NewTeam(Helper.MakeNameWithTimestamp("team"))))
                {
                    teamContext.InviteMember("octokitnet-test1");
                    teamContext.InviteMember("octokitnet-test2");

                    var pendingInvitations = await _gitHub.Organization.Member.GetAllPendingInvitations(Helper.Organization);
                    Assert.NotEmpty(pendingInvitations);
                    Assert.Equal(2, pendingInvitations.Count);
                }
            }

            [OrganizationTest]
            public async Task ReturnsCorrectCountOfPendingInvitationsWithoutStart()
            {
                using (var teamContext = await _gitHub.CreateTeamContext(Helper.Organization, new NewTeam(Helper.MakeNameWithTimestamp("team"))))
                {
                    teamContext.InviteMember("octokitnet-test1");
                    teamContext.InviteMember("octokitnet-test2");

                    var options = new ApiOptions
                    {
                        PageCount = 1,
                        PageSize = 1
                    };

                    var pendingInvitations = await _gitHub.Organization.Member.GetAllPendingInvitations(Helper.Organization, options);
                    Assert.NotEmpty(pendingInvitations);
                    Assert.Single(pendingInvitations);
                }
            }

            [OrganizationTest]
            public async Task ReturnsCorrectCountOfPendingInvitationsWithStart()
            {
                using (var teamContext = await _gitHub.CreateTeamContext(Helper.Organization, new NewTeam(Helper.MakeNameWithTimestamp("team"))))
                {
                    teamContext.InviteMember("octokitnet-test1");
                    teamContext.InviteMember("octokitnet-test2");

                    var firstPageOptions = new ApiOptions
                    {
                        PageCount = 1,
                        PageSize = 1,
                        StartPage = 1
                    };

                    var firstPagePendingInvitations = await _gitHub.Organization.Member.GetAllPendingInvitations(Helper.Organization, firstPageOptions);
                    Assert.NotEmpty(firstPagePendingInvitations);
                    Assert.Single(firstPagePendingInvitations);

                    var secondPageOptions = new ApiOptions
                    {
                        PageCount = 1,
                        PageSize = 1,
                        StartPage = 2
                    };

                    var secondPagePendingInvitations = await _gitHub.Organization.Member.GetAllPendingInvitations(Helper.Organization, secondPageOptions);
                    Assert.NotEmpty(secondPagePendingInvitations);
                    Assert.Single(secondPagePendingInvitations);

                    Assert.NotEqual(firstPagePendingInvitations[0].Login, secondPagePendingInvitations[0].Login);
                }
            }
        }

        public class TheGetAllFailedInvitationsMethod
        {
            readonly IGitHubClient _gitHub;

            public TheGetAllFailedInvitationsMethod()
            {
                _gitHub = Helper.GetAuthenticatedClient();
            }

            [OrganizationTest]
            public async Task ReturnsNoFailedInvitations()
            {
                var pendingInvitations = await _gitHub.Organization.Member.GetAllFailedInvitations(Helper.Organization);
                Assert.NotNull(pendingInvitations);
                Assert.Empty(pendingInvitations);
            }
        }

        public class TheGetAllOrganizationMembershipsForCurrentMethod
        {
            private readonly IGitHubClient _gitHub;

            public TheGetAllOrganizationMembershipsForCurrentMethod()
            {
                _gitHub = Helper.GetAuthenticatedClient();
            }

            [OrganizationTest]
            public async Task ReturnsMemberships()
            {
                var memberships = await _gitHub.Organization.Member.GetAllOrganizationMembershipsForCurrent();
                Assert.NotEmpty(memberships);
            }

            [OrganizationTest]
            public async Task ReturnsCorrectCountOfMembersWithoutStart()
            {
                var options = new ApiOptions
                {
                    PageCount = 1,
                    PageSize = 1
                };

                var memberships = await _gitHub.Organization.Member.GetAllOrganizationMembershipsForCurrent(options);

                Assert.Single(memberships);
            }

        }
    }
}