using System.Reflection;
using Omika.Core.Contracts.Clients;
using Omika.Core.Contracts.Common;
using Omika.Core.Contracts.Mobile.Sync;
using Omika.Core.Domain.Commands;
using Omika.Core.Domain.Entities.Clients;
using Omika.Core.Domain.ValueObjects;
using Omika.Core.Interfaces;
using Omika.Core.Interfaces.Mobile;
using Omika.Core.Mapping;
using Omika.Core.Services;

namespace Omika.Tests.Services;

/// <summary>
/// Tests unitaires de <see cref="ClientService"/> avec un fake
/// <see cref="IClientRepository"/> en mémoire. Aucune base réelle.
/// </summary>
public class ClientServiceTests
{
    private static readonly IMobileEntityIdentityResolver IdentityResolver = new FakeIdentityResolver();

    // =========================================================================
    // SEARCH
    // =========================================================================

    [Fact]
    public async Task SearchAsync_CallsRepositoryOnce()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest());

        Assert.Equal(1, repo.SearchCallCount);
    }

    [Fact]
    public async Task SearchAsync_TransmitsPage()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { Page = 3 });

        Assert.Equal(3, repo.LastSearchCriteria?.Page);
    }

    [Fact]
    public async Task SearchAsync_TransmitsPageSize()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { PageSize = 50 });

        Assert.Equal(50, repo.LastSearchCriteria?.PageSize);
    }

    [Fact]
    public async Task SearchAsync_TransmitsSearch()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { Search = "test" });

        Assert.Equal("test", repo.LastSearchCriteria?.Search);
    }

    [Fact]
    public async Task SearchAsync_TransmitsNom()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { Nom = "Dupont" });

        Assert.Equal("Dupont", repo.LastSearchCriteria?.Nom);
    }

    [Fact]
    public async Task SearchAsync_TransmitsCode()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { Code = "C001" });

        Assert.Equal("C001", repo.LastSearchCriteria?.Code);
    }

    [Fact]
    public async Task SearchAsync_TransmitsVille()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { Ville = "Paris" });

        Assert.Equal("Paris", repo.LastSearchCriteria?.Ville);
    }

    [Fact]
    public async Task SearchAsync_TransmitsType()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { Type = "Entreprise" });

        Assert.Equal("Entreprise", repo.LastSearchCriteria?.Type);
    }

    [Fact]
    public async Task SearchAsync_TransmitsStatut()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { Statut = "Actif" });

        Assert.Equal("Actif", repo.LastSearchCriteria?.Statut);
    }

    [Fact]
    public async Task SearchAsync_TransmitsEstArchive()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { EstArchive = true });

        Assert.True(repo.LastSearchCriteria?.EstArchive);
    }

    [Fact]
    public async Task SearchAsync_TransmitsEstBloque()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { EstBloque = true });

        Assert.True(repo.LastSearchCriteria?.EstBloque);
    }

    [Fact]
    public async Task SearchAsync_TransmitsSortBy()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { SortBy = "Code" });

        Assert.Equal("Code", repo.LastSearchCriteria?.SortBy);
    }

    [Fact]
    public async Task SearchAsync_TransmitsSortDescending()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.SearchAsync(new SearchClientsRequest { SortDescending = true });

        Assert.True(repo.LastSearchCriteria?.SortDescending);
    }

    [Fact]
    public async Task SearchAsync_TransmitsCancellationToken()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);
        using var cts = new CancellationTokenSource();

        await service.SearchAsync(new SearchClientsRequest(), cts.Token);

        Assert.Equal(cts.Token, repo.LastCancellationToken);
    }

    [Fact]
    public async Task SearchAsync_EmptyResult_ReturnsEmptyPage()
    {
        var repo = new FakeClientRepository
        {
            SearchResult = new PagedResult<Client>([], 1, 20, 0, 0)
        };
        var service = new ClientService(repo, IdentityResolver);

        PagedResult<ClientSummaryDto> result = await service.SearchAsync(
            new SearchClientsRequest());

        Assert.Empty(result.Items);
        Assert.Equal(0, result.TotalCount);
        Assert.Equal(0, result.TotalPages);
        Assert.Equal(1, result.Page);
        Assert.Equal(20, result.PageSize);
    }

    [Fact]
    public async Task SearchAsync_SingleClient_MapsToSummaryDto()
    {
        var client = new Client
        {
            Code = "C001",
            Nom = "Dupont",
            Type = new ReferenceValue("Entreprise") { Key = "ENTREPRISE" },
            Statut = new ReferenceValue("Actif") { Key = "ACTIF" },
            AdressePrincipale = new Adresse
            {
                AdressePostale = new PostalAddress(City: "Paris")
            },
            Coordonnees = new ContactDetails(Phone: "0102030405"),
            EstBloque = false,
            EstArchive = false
        };
        var repo = new FakeClientRepository
        {
            SearchResult = new PagedResult<Client>([client], 1, 20, 1, 1)
        };
        var service = new ClientService(repo, IdentityResolver);

        PagedResult<ClientSummaryDto> result = await service.SearchAsync(
            new SearchClientsRequest());

        ClientSummaryDto dto = Assert.Single(result.Items);
        Assert.Equal("C001", dto.Code);
        Assert.Equal("Dupont", dto.Nom);
        Assert.Equal("Entreprise", dto.Type);
        Assert.Equal("Actif", dto.Statut);
        Assert.Equal("Paris", dto.Ville);
        Assert.Equal("0102030405", dto.Telephone);
        Assert.False(dto.EstBloque);
        Assert.False(dto.EstArchive);
    }

    [Fact]
    public async Task SearchAsync_MultipleClients_MapsAllToDtos()
    {
        var clients = new[]
        {
            new Client { Nom = "Alpha", Code = "A" },
            new Client { Nom = "Beta", Code = "B" },
            new Client { Nom = "Gamma", Code = "C" }
        };
        var repo = new FakeClientRepository
        {
            SearchResult = new PagedResult<Client>(clients, 1, 20, 3, 1)
        };
        var service = new ClientService(repo, IdentityResolver);

        PagedResult<ClientSummaryDto> result = await service.SearchAsync(
            new SearchClientsRequest());

        Assert.Equal(3, result.Items.Count);
        Assert.Equal(3, result.TotalCount);
        Assert.Equal("Alpha", result.Items[0].Nom);
        Assert.Equal("Beta", result.Items[1].Nom);
        Assert.Equal("Gamma", result.Items[2].Nom);
    }

    [Fact]
    public async Task SearchAsync_PreservesTotalCount()
    {
        var repo = new FakeClientRepository
        {
            SearchResult = new PagedResult<Client>([], 2, 10, 42, 5)
        };
        var service = new ClientService(repo, IdentityResolver);

        PagedResult<ClientSummaryDto> result = await service.SearchAsync(
            new SearchClientsRequest());

        Assert.Equal(42, result.TotalCount);
        Assert.Equal(2, result.Page);
        Assert.Equal(10, result.PageSize);
        Assert.Equal(5, result.TotalPages);
    }

    [Fact]
    public async Task SearchAsync_IdComesFromClientContractMapper()
    {
        var client = new Client { Nom = "Test" };
        var expectedId = client.Id.ToString();
        var repo = new FakeClientRepository
        {
            SearchResult = new PagedResult<Client>([client], 1, 20, 1, 1)
        };
        var service = new ClientService(repo, IdentityResolver);

        PagedResult<ClientSummaryDto> result = await service.SearchAsync(
            new SearchClientsRequest());

        Assert.Equal(expectedId, result.Items[0].Id);
    }

    [Fact]
    public async Task SearchAsync_ServiceDoesNotRePaginate()
    {
        // Le service ne doit pas altérer la pagination du repository.
        var repo = new FakeClientRepository
        {
            SearchResult = new PagedResult<Client>(
                [new Client { Nom = "A" }, new Client { Nom = "B" }], 3, 15, 100, 7)
        };
        var service = new ClientService(repo, IdentityResolver);

        PagedResult<ClientSummaryDto> result = await service.SearchAsync(
            new SearchClientsRequest { Page = 1, PageSize = 5 });

        // Le repo reçoit la demande mais retourne ce qu'il veut.
        // Le service doit préserver le résultat du repo, pas refaire la pagination.
        Assert.Equal(2, result.Items.Count);
        Assert.Equal(100, result.TotalCount);
        Assert.Equal(7, result.TotalPages);
    }

    // =========================================================================
    // DETAIL
    // =========================================================================

    [Fact]
    public async Task GetByIdAsync_TransmitsExactId()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.GetByIdAsync("test-id-123");

        Assert.Equal("test-id-123", repo.LastDetailsId);
    }

    [Fact]
    public async Task GetByIdAsync_TransmitsCancellationToken()
    {
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);
        using var cts = new CancellationTokenSource();

        await service.GetByIdAsync("42", cts.Token);

        Assert.Equal(cts.Token, repo.LastCancellationToken);
    }

    [Fact]
    public async Task GetByIdAsync_RepositoryReturnsNull_ReturnsNull()
    {
        var repo = new FakeClientRepository { DetailsResult = null };
        var service = new ClientService(repo, IdentityResolver);

        ClientDetailsDto? result = await service.GetByIdAsync("999");

        Assert.Null(result);
    }

    [Fact]
    public async Task GetByIdAsync_MapsToDetailsDto()
    {
        var client = new Client
        {
            Code = "C001",
            Nom = "Dupont",
            Type = new ReferenceValue("Entreprise") { Key = "ENTREPRISE" },
            Statut = new ReferenceValue("Actif") { Key = "ACTIF" },
            EstBloque = false,
            EstArchive = false
        };
        var repo = new FakeClientRepository { DetailsResult = client };
        var service = new ClientService(repo, IdentityResolver);

        ClientDetailsDto? result = await service.GetByIdAsync("42");

        Assert.NotNull(result);
        Assert.Equal("C001", result.Code);
        Assert.Equal("Dupont", result.Nom);
        Assert.Equal("Entreprise", result.Type?.Label);
        Assert.Equal("Actif", result.Statut?.Label);
    }

    [Fact]
    public async Task GetByIdAsync_AdressesMapped()
    {
        var client = new Client { Nom = "Test" };
        client.AddAdresse(new Adresse
        {
            Etiquette = "Siège",
            AdressePostale = new PostalAddress(City: "Paris"),
            EstPrincipale = true
        });
        var repo = new FakeClientRepository { DetailsResult = client };
        var service = new ClientService(repo, IdentityResolver);

        ClientDetailsDto? result = await service.GetByIdAsync("42");

        Assert.NotNull(result);
        Assert.Single(result.Adresses);
        Assert.Equal("Siège", result.Adresses[0].Etiquette);
        Assert.Equal("Paris", result.Adresses[0].AdressePostale?.City);
    }

    [Fact]
    public async Task GetByIdAsync_ContactsMapped()
    {
        var client = new Client { Nom = "Test" };
        client.AddContact(new Contact { Nom = "Martin", Prenom = "Jean" });
        var repo = new FakeClientRepository { DetailsResult = client };
        var service = new ClientService(repo, IdentityResolver);

        ClientDetailsDto? result = await service.GetByIdAsync("42");

        Assert.NotNull(result);
        Assert.Single(result.Contacts);
        Assert.Equal("Martin", result.Contacts[0].Nom);
        Assert.Equal("Jean Martin", result.Contacts[0].NomAffiche);
    }

    [Fact]
    public async Task GetByIdAsync_SitesMapped()
    {
        var client = new Client { Nom = "Test" };
        client.AddSite(new Site { Code = "S1", Nom = "Site 1" });
        var repo = new FakeClientRepository { DetailsResult = client };
        var service = new ClientService(repo, IdentityResolver);

        ClientDetailsDto? result = await service.GetByIdAsync("42");

        Assert.NotNull(result);
        Assert.Single(result.Sites);
        Assert.Equal("S1", result.Sites[0].Code);
    }

    [Fact]
    public async Task GetByIdAsync_IdComesFromMapper()
    {
        var client = new Client { Nom = "Test" };
        var expectedId = client.Id.ToString();
        var repo = new FakeClientRepository { DetailsResult = client };
        var service = new ClientService(repo, IdentityResolver);

        ClientDetailsDto? result = await service.GetByIdAsync("42");

        Assert.NotNull(result);
        Assert.Equal(expectedId, result.Id);
    }

    [Fact]
    public async Task GetByIdAsync_NoGuidParsingInService()
    {
        // Le service transmet l'id tel quel, sans parsing.
        var repo = new FakeClientRepository();
        var service = new ClientService(repo, IdentityResolver);

        await service.GetByIdAsync("not-a-guid-nor-int");

        Assert.Equal("not-a-guid-nor-int", repo.LastDetailsId);
    }

    [Fact]
    public async Task GetByIdAsync_RepositoryException_Propagated()
    {
        var repo = new FakeClientRepository
        {
            ThrowOnDetails = new InvalidOperationException("Infrastructure error")
        };
        var service = new ClientService(repo, IdentityResolver);

        var ex = await Assert.ThrowsAsync<InvalidOperationException>(
            () => service.GetByIdAsync("42"));

        Assert.Equal("Infrastructure error", ex.Message);
    }

    // =========================================================================
    // CREATE
    // =========================================================================

    [Fact]
    public async Task CreateAsync_CallsRepositoryOnce()
    {
        var repo = new FakeClientRepository
        {
            CreateResult = new Client { Nom = "Nouveau", Code = "C001" }
        };
        var service = new ClientService(repo, IdentityResolver);

        await service.CreateAsync(new CreateClientRequest { Nom = "Nouveau" });

        Assert.Equal(1, repo.CreateCallCount);
    }

    [Fact]
    public async Task CreateAsync_MapsAllProperties()
    {
        var repo = new FakeClientRepository
        {
            CreateResult = new Client { Nom = "Nouveau" }
        };
        var service = new ClientService(repo, IdentityResolver);

        await service.CreateAsync(new CreateClientRequest
        {
            Code = "C001",
            Nom = "Nouveau",
            Type = new ReferenceValueDto { Key = "ENT" },
            Statut = new ReferenceValueDto { Key = "ACT" },
            FormeJuridique = new ReferenceValueDto { Key = "SARL" },
            CodeTva = "FR123",
            CodeComptable = "411",
            Siren = "123456789",
            Siret = "12345678900014",
            Pays = "FR",
            Coordonnees = new ContactDetailsDto { Email = "a@b.c", Phone = "0102" },
            InformationsComplementaires = "Info sup",
            AdressePrincipale = new AddressDto
            {
                Label = "Etiquette",
                Line1 = "1 rue",
                PostalCode = "75001",
                City = "Paris"
            }
        });

        Assert.Equal("C001", repo.LastCreateCommand!.Code);
        Assert.Equal("Nouveau", repo.LastCreateCommand!.Nom);
        Assert.Equal("ENT", repo.LastCreateCommand!.TypeKey);
        Assert.Equal("ACT", repo.LastCreateCommand!.StatutKey);
        Assert.Equal("SARL", repo.LastCreateCommand!.FormeJuridique);
        Assert.Equal("FR123", repo.LastCreateCommand!.CodeTva);
        Assert.Equal("411", repo.LastCreateCommand!.CodeComptable);
        Assert.Equal("123456789", repo.LastCreateCommand!.Siren);
        Assert.Equal("12345678900014", repo.LastCreateCommand!.Siret);
        Assert.Equal("FR", repo.LastCreateCommand!.Pays);
        Assert.Equal("a@b.c", repo.LastCreateCommand!.Email);
        Assert.Equal("0102", repo.LastCreateCommand!.Telephone);
        Assert.Equal("Info sup", repo.LastCreateCommand!.InformationsComplementaires);
        Assert.Equal("Etiquette", repo.LastCreateCommand!.AdresseEtiquette);
        Assert.Equal("1 rue", repo.LastCreateCommand!.AdresseLigne1);
        Assert.Equal("75001", repo.LastCreateCommand!.AdresseCodePostal);
        Assert.Equal("Paris", repo.LastCreateCommand!.AdresseVille);
    }

    [Fact]
    public async Task CreateAsync_ResultMappedToDetails()
    {
        var repo = new FakeClientRepository
        {
            CreateResult = new Client { Nom = "Nouveau", Code = "C001" }
        };
        var service = new ClientService(repo, IdentityResolver);

        ClientDetailsDto result = await service.CreateAsync(new CreateClientRequest { Nom = "Nouveau" });

        Assert.Equal("Nouveau", result.Nom);
        Assert.Equal("C001", result.Code);
    }

    [Fact]
    public async Task CreateAsync_CancellationTokenTransmitted()
    {
        var repo = new FakeClientRepository
        {
            CreateResult = new Client { Nom = "Nouveau" }
        };
        var service = new ClientService(repo, IdentityResolver);
        using var cts = new CancellationTokenSource();

        await service.CreateAsync(new CreateClientRequest { Nom = "Nouveau" }, cts.Token);

        Assert.Equal(cts.Token, repo.LastCreateCancellationToken);
    }

    [Fact]
    public async Task CreateAsync_ExceptionPropagated()
    {
        var repo = new FakeClientRepository
        {
            ThrowOnCreate = new InvalidOperationException("Panne")
        };
        var service = new ClientService(repo, IdentityResolver);

        var ex = await Assert.ThrowsAsync<InvalidOperationException>(
            () => service.CreateAsync(new CreateClientRequest { Nom = "Nouveau" }));

        Assert.Equal("Panne", ex.Message);
    }

    // =========================================================================
    // UPDATE
    // =========================================================================

    [Fact]
    public async Task UpdateAsync_MapsAllProperties()
    {
        var repo = new FakeClientRepository
        {
            UpdateResult = new Client { Nom = "Updated", Code = "C002" }
        };
        var service = new ClientService(repo, IdentityResolver);

        await service.UpdateAsync("42", new UpdateClientRequest
        {
            Code = "C002",
            Nom = "Updated",
            Type = new ReferenceValueDto { Key = "ENT" },
            Statut = new ReferenceValueDto { Key = "ACT" },
            FormeJuridique = new ReferenceValueDto { Key = "SARL" },
            CodeTva = "FR123",
            CodeComptable = "411",
            Siren = "123456789",
            Siret = "12345678900014",
            Pays = "FR",
            Coordonnees = new ContactDetailsDto { Email = "a@b.c", Phone = "0102" },
            InformationsComplementaires = "Info sup",
            EstBloque = true
        });

        Assert.Equal(1, repo.UpdateCallCount);
        Assert.Equal("42", repo.LastUpdateId);
        Assert.Equal("C002", repo.LastUpdateCommand!.Code);
        Assert.Equal("Updated", repo.LastUpdateCommand!.Nom);
        Assert.Equal("ENT", repo.LastUpdateCommand!.TypeKey);
        Assert.Equal("ACT", repo.LastUpdateCommand!.StatutKey);
        Assert.Equal("SARL", repo.LastUpdateCommand!.FormeJuridique);
        Assert.Equal("FR123", repo.LastUpdateCommand!.CodeTva);
        Assert.Equal("411", repo.LastUpdateCommand!.CodeComptable);
        Assert.Equal("123456789", repo.LastUpdateCommand!.Siren);
        Assert.Equal("12345678900014", repo.LastUpdateCommand!.Siret);
        Assert.Equal("FR", repo.LastUpdateCommand!.Pays);
        Assert.Equal("a@b.c", repo.LastUpdateCommand!.Email);
        Assert.Equal("0102", repo.LastUpdateCommand!.Telephone);
        Assert.Equal("Info sup", repo.LastUpdateCommand!.InformationsComplementaires);
        Assert.True(repo.LastUpdateCommand!.EstBloque);
    }

    [Fact]
    public async Task UpdateAsync_NullsPreserved()
    {
        var repo = new FakeClientRepository { UpdateResult = new Client { Nom = "X" } };
        var service = new ClientService(repo, IdentityResolver);

        await service.UpdateAsync("42", new UpdateClientRequest());

        Assert.Null(repo.LastUpdateCommand!.TypeKey);
        Assert.Null(repo.LastUpdateCommand!.StatutKey);
        Assert.Null(repo.LastUpdateCommand!.FormeJuridique);
        Assert.Null(repo.LastUpdateCommand!.Email);
        Assert.Null(repo.LastUpdateCommand!.Telephone);
    }

    [Fact]
    public async Task UpdateAsync_RepoReturnsNull_ReturnsNull()
    {
        var repo = new FakeClientRepository { UpdateResult = null };
        var service = new ClientService(repo, IdentityResolver);

        ClientDetailsDto? result = await service.UpdateAsync("42", new UpdateClientRequest());

        Assert.Null(result);
    }

    [Fact]
    public async Task UpdateAsync_IdTransmittedExactly()
    {
        var repo = new FakeClientRepository
        {
            UpdateResult = new Client { Nom = "XY" }
        };
        var service = new ClientService(repo, IdentityResolver);

        await service.UpdateAsync("my-guid-123", new UpdateClientRequest());

        Assert.Equal("my-guid-123", repo.LastUpdateId);
    }

    [Fact]
    public async Task UpdateAsync_CancellationTokenTransmitted()
    {
        var repo = new FakeClientRepository { UpdateResult = new Client { Nom = "X" } };
        var service = new ClientService(repo, IdentityResolver);
        using var cts = new CancellationTokenSource();

        await service.UpdateAsync("42", new UpdateClientRequest(), cts.Token);

        Assert.Equal(cts.Token, repo.LastUpdateCancellationToken);
    }

    [Fact]
    public async Task UpdateAsync_ExceptionPropagated()
    {
        var repo = new FakeClientRepository
        {
            ThrowOnUpdate = new InvalidOperationException("Panne")
        };
        var service = new ClientService(repo, IdentityResolver);

        var ex = await Assert.ThrowsAsync<InvalidOperationException>(
            () => service.UpdateAsync("42", new UpdateClientRequest()));

        Assert.Equal("Panne", ex.Message);
    }

    // =========================================================================
    // ARCHIVE
    // =========================================================================

    [Fact]
    public async Task ArchiveAsync_TruePropagated()
    {
        var repo = new FakeClientRepository { ArchiveResult = true };
        var service = new ClientService(repo, IdentityResolver);

        bool result = await service.ArchiveAsync("42");

        Assert.True(result);
        Assert.Equal(1, repo.ArchiveCallCount);
    }

    [Fact]
    public async Task ArchiveAsync_FalsePropagated()
    {
        var repo = new FakeClientRepository { ArchiveResult = false };
        var service = new ClientService(repo, IdentityResolver);

        bool result = await service.ArchiveAsync("42");

        Assert.False(result);
    }

    [Fact]
    public async Task ArchiveAsync_IdTransmittedExactly()
    {
        var repo = new FakeClientRepository { ArchiveResult = true };
        var service = new ClientService(repo, IdentityResolver);

        await service.ArchiveAsync("my-guid-123");

        Assert.Equal("my-guid-123", repo.LastArchiveId);
    }

    [Fact]
    public async Task ArchiveAsync_CancellationTokenTransmitted()
    {
        var repo = new FakeClientRepository { ArchiveResult = true };
        var service = new ClientService(repo, IdentityResolver);
        using var cts = new CancellationTokenSource();

        await service.ArchiveAsync("42", cts.Token);

        Assert.Equal(cts.Token, repo.LastArchiveCancellationToken);
    }

    [Fact]
    public async Task ArchiveAsync_ExceptionPropagated()
    {
        var repo = new FakeClientRepository
        {
            ThrowOnArchive = new InvalidOperationException("Panne")
        };
        var service = new ClientService(repo, IdentityResolver);

        var ex = await Assert.ThrowsAsync<InvalidOperationException>(
            () => service.ArchiveAsync("42"));

        Assert.Equal("Panne", ex.Message);
    }

    // =========================================================================
    // ARCHITECTURE
    // =========================================================================

    [Fact]
    public void Service_ImplementsIClientService()
    {
        Assert.True(typeof(IClientService).IsAssignableFrom(typeof(ClientService)));
    }

    [Fact]
    public void Service_DependsOnIClientRepository()
    {
        var type = typeof(ClientService);
        bool hasRepoParam = type.GetConstructors()
            .Any(c => c.GetParameters()
                .Any(p => p.ParameterType == typeof(IClientRepository)));

        Assert.True(hasRepoParam, "ClientService doit dépendre de IClientRepository.");
    }

    [Fact]
    public void Service_HasNoOmikaDataReferences()
    {
        var type = typeof(ClientService);
        var refs = GetReferencedTypes(type);

        Assert.DoesNotContain(refs, t =>
            t.Namespace is not null && t.Namespace.StartsWith("Omika.Data"));
    }

    [Fact]
    public void Service_HasNoBatikReferences()
    {
        var type = typeof(ClientService);
        var refs = GetReferencedTypes(type);

        Assert.DoesNotContain(refs, t =>
            t.Name.Contains("Batik", StringComparison.OrdinalIgnoreCase));
    }

    [Fact]
    public void Service_HasNoHfsqlReferences()
    {
        var type = typeof(ClientService);
        var refs = GetReferencedTypes(type);

        Assert.DoesNotContain(refs, t =>
            t.Name.Contains("Row", StringComparison.OrdinalIgnoreCase)
            && t.Namespace is not null
            && (t.Namespace.Contains("HfSql", StringComparison.OrdinalIgnoreCase)
                || t.Namespace.Contains("Models.Omika", StringComparison.OrdinalIgnoreCase)));
    }

    [Fact]
    public void Service_HasNoSqlStatements()
    {
        string source = ReadSourceFile(typeof(ClientService));

        Assert.DoesNotContain("SELECT ", source, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("FROM ", source, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void Service_HasNoApplicationRuntimeContext()
    {
        var type = typeof(ClientService);
        var refs = GetReferencedTypes(type);

        Assert.DoesNotContain(refs, t =>
            t.Name.Contains("ApplicationRuntimeContext", StringComparison.OrdinalIgnoreCase));
    }

    [Fact]
    public void Service_HasNoDatabaseSchemaVersion()
    {
        var type = typeof(ClientService);
        var refs = GetReferencedTypes(type);

        Assert.DoesNotContain(refs, t =>
            t.Name.Contains("DatabaseSchemaVersion", StringComparison.OrdinalIgnoreCase));
    }

    [Fact]
    public void Service_HasNoOdbcReferences()
    {
        var type = typeof(ClientService);
        var refs = GetReferencedTypes(type);

        Assert.DoesNotContain(refs, t =>
            t.Namespace is not null && t.Namespace.StartsWith("System.Data.Odbc", StringComparison.Ordinal));
    }

    // =========================================================================
    // HELPERS
    // =========================================================================

    private static IEnumerable<Type> GetReferencedTypes(Type type)
    {
        var members = type.GetMembers(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static)
            .Select(m => m.DeclaringType)
            .Where(t => t is not null)
            .Cast<Type>();

        var parameters = type.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
            .SelectMany(m => m.GetParameters())
            .Select(p => p.ParameterType);

        var returnTypes = type.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
            .Select(m => m.ReturnType);

        var properties = type.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
            .Select(p => p.PropertyType);

        var ctorParams = type.GetConstructors()
            .SelectMany(c => c.GetParameters())
            .Select(p => p.ParameterType);

        return members.Concat(parameters).Concat(returnTypes).Concat(properties).Concat(ctorParams);
    }

    private static string ReadSourceFile(Type type)
    {
        string baseDir = AppDomain.CurrentDomain.BaseDirectory;
        var dir = new DirectoryInfo(baseDir);
        while (dir != null && !File.Exists(Path.Combine(dir.FullName, "Omika.slnx")))
            dir = dir.Parent;

        string root = dir?.FullName ?? baseDir;
        return File.ReadAllText(Path.Combine(root, "src", "Omika.Core", "Services", type.Name + ".cs"));
    }

    // =========================================================================
    // FAKE REPOSITORY
    // =========================================================================

    private sealed class FakeClientRepository : IClientRepository
    {
        public int SearchCallCount { get; private set; }
        public int DetailsCallCount { get; private set; }
        public int UpdateCallCount { get; private set; }
        public int ArchiveCallCount { get; private set; }
        public int CreateCallCount { get; private set; }
        public ClientSearchCriteria? LastSearchCriteria { get; private set; }
        public string? LastDetailsId { get; private set; }
        public string? LastUpdateId { get; private set; }
        public string? LastArchiveId { get; private set; }
        public ClientUpdateCommand? LastUpdateCommand { get; private set; }
        public ClientCreateCommand? LastCreateCommand { get; private set; }
        public CancellationToken LastUpdateCancellationToken { get; private set; }
        public CancellationToken LastArchiveCancellationToken { get; private set; }
        public CancellationToken LastCreateCancellationToken { get; private set; }
        public CancellationToken LastCancellationToken { get; private set; }
        public PagedResult<Client>? SearchResult { get; set; }
        public Client? DetailsResult { get; set; }
        public Client? UpdateResult { get; set; }
        public Client? CreateResult { get; set; }
        public bool ArchiveResult { get; set; }
        public Exception? ThrowOnSearch { get; set; }
        public Exception? ThrowOnDetails { get; set; }
        public Exception? ThrowOnUpdate { get; set; }
        public Exception? ThrowOnArchive { get; set; }
        public Exception? ThrowOnCreate { get; set; }

        public Task<Client> CreateAsync(
            ClientCreateCommand command,
            CancellationToken cancellationToken = default)
        {
            CreateCallCount++;
            LastCreateCommand = command;
            LastCreateCancellationToken = cancellationToken;

            if (ThrowOnCreate is not null)
                throw ThrowOnCreate;

            return Task.FromResult(CreateResult ?? new Client { Nom = command.Nom });
        }

        public Task<PagedResult<Client>> SearchAsync(

            ClientSearchCriteria criteria,
            CancellationToken cancellationToken = default)
        {
            SearchCallCount++;
            LastSearchCriteria = criteria;
            LastCancellationToken = cancellationToken;

            if (ThrowOnSearch is not null)
                throw ThrowOnSearch;

            return Task.FromResult(SearchResult
                ?? new PagedResult<Client>([], 1, 20, 0, 0));
        }

        public Task<PagedResult<Client>> SearchDetailsAsync(
            ClientSearchCriteria criteria,
            CancellationToken cancellationToken = default)
        {
            SearchCallCount++;
            LastSearchCriteria = criteria;
            LastCancellationToken = cancellationToken;

            if (ThrowOnSearch is not null)
                throw ThrowOnSearch;

            return Task.FromResult(SearchResult
                ?? new PagedResult<Client>([], 1, 20, 0, 0));
        }

        public Task<Client?> GetDetailsAsync(

            string id,
            CancellationToken cancellationToken = default)
        {
            DetailsCallCount++;
            LastDetailsId = id;
            LastCancellationToken = cancellationToken;

            if (ThrowOnDetails is not null)
                throw ThrowOnDetails;

            return Task.FromResult(DetailsResult);
        }

        public Task<Client?> UpdateAsync(
            string id, ClientUpdateCommand command,
            CancellationToken cancellationToken = default)
        {
            UpdateCallCount++;
            LastUpdateId = id;
            LastUpdateCommand = command;
            LastUpdateCancellationToken = cancellationToken;

            if (ThrowOnUpdate is not null)
                throw ThrowOnUpdate;

            return Task.FromResult(UpdateResult);
        }

        public Task<bool> ArchiveAsync(
            string id,
            CancellationToken cancellationToken = default)
        {
            ArchiveCallCount++;
            LastArchiveId = id;
            LastArchiveCancellationToken = cancellationToken;

            if (ThrowOnArchive is not null)
                throw ThrowOnArchive;

            return Task.FromResult(ArchiveResult);
        }
    }

    private sealed class FakeIdentityResolver : IMobileEntityIdentityResolver
    {
        public Guid CreateCanonicalIdentity(string entityType, PhysicalEntityIdentity physical)
            => physical.Guid ?? Guid.NewGuid();

        public PhysicalEntityIdentity? ResolvePhysicalIdentity(string entityType, Guid publicGuid)
            => new() { Guid = publicGuid };

        public bool IsCanonical(string entityType, Guid publicGuid)
            => publicGuid != Guid.Empty;
    }
}