using Omika.Core.Contracts.Interventions;
using Omika.Core.Contracts.Mobile.Sync;
using Omika.Core.Domain.Commands;
using Omika.Core.Domain.Entities.Interventions;
using Omika.Core.Interfaces;
using Omika.Core.Interfaces.Mobile;
using Omika.Core.Services;

namespace Omika.Tests.Services;

/// <summary>
/// Tests unitaires de <see cref="CompteRenduService"/> avec des fakes en mémoire.
/// Aucune base réelle, aucune dépendance Omika.Data.
/// </summary>
public class CompteRenduServiceTests
{
    // =========================================================================
    // GET
    // =========================================================================

    [Fact]
    public async Task GetByRendezVousAsync_RepositoryReturnsNull_ReturnsNull()
    {
        var repo = new FakeCompteRenduRepository(existing: null);
        var service = new CompteRenduService(repo, new FakeIdentityResolver());

        CompteRenduDto? result = await service.GetByRendezVousAsync("rdv-1");

        Assert.Null(result);
    }

    [Fact]
    public async Task GetByRendezVousAsync_MapsAndEchoesRendezVousId()
    {
        var existing = new CompteRendu
        {
            Id = Guid.NewGuid(),
            NoteCollaborateur = "Intervention terminée",
            NomSignataire = "Jean Client",
            DevisConforme = true
        };
        var repo = new FakeCompteRenduRepository(existing);
        var service = new CompteRenduService(repo, new FakeIdentityResolver());

        CompteRenduDto? result = await service.GetByRendezVousAsync("rdv-1");

        Assert.NotNull(result);
        Assert.Equal("rdv-1", result!.RendezVousId);
        Assert.Equal("Intervention terminée", result.NoteCollaborateur);
        Assert.Equal("Jean Client", result.NomSignataire);
        Assert.True(result.DevisConforme);
    }

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

    [Fact]
    public async Task CreateAsync_Idempotent_ReturnsExistingWithoutCreating()
    {
        var existing = new CompteRendu { Id = Guid.NewGuid(), NoteCollaborateur = "Existant" };
        var repo = new FakeCompteRenduRepository(existing);
        var service = new CompteRenduService(repo, new FakeIdentityResolver());

        CompteRenduDto result = await service.CreateAsync("rdv-1", new CreateCompteRenduRequest());

        Assert.Equal("Existant", result.NoteCollaborateur);
        Assert.Equal(0, repo.CreateCallCount);
    }

    [Fact]
    public async Task CreateAsync_MapsRequestFieldsToCommand()
    {
        var repo = new FakeCompteRenduRepository(existing: null);
        var service = new CompteRenduService(repo, new FakeIdentityResolver());

        await service.CreateAsync("rdv-1", new CreateCompteRenduRequest
        {
            CollaborateurId = "collab-1",
            NoteCollaborateur = "Note collab",
            NomSignataire = "Client",
            NoteSignataire = "Note client",
            NomSignataireTech = "Tech",
            DevisConforme = true,
            AvecReserve = true,
            ReserveCommentaire = "Réserve",
            TypeSignataire = new Omika.Core.Contracts.Common.ReferenceValueDto { Key = "CLIENT", LegacyId = 42 }
        });

        Assert.Equal(1, repo.CreateCallCount);
        CompteRenduCreateCommand? command = repo.LastCommand;
        Assert.NotNull(command);
        Assert.Equal("collab-1", command!.CollaborateurId);
        Assert.Equal("Note collab", command.NoteCollaborateur);
        Assert.Equal("Client", command.NomSignataire);
        Assert.Equal("Note client", command.NoteSignataire);
        Assert.Equal("Tech", command.NomSignataireTech);
        Assert.True(command.DevisConforme);
        Assert.True(command.AvecReserve);
        Assert.Equal("Réserve", command.ReserveCommentaire);
        Assert.Equal("CLIENT", command.TypeSignataireKey);
        Assert.Equal(42, command.TypeSignataireLegacyId);
    }

    [Fact]
    public async Task CreateAsync_ResolvesSyntheticGuidToNumericId()
    {
        var repo = new FakeCompteRenduRepository(existing: null);
        Guid publicGuid = Guid.NewGuid();
        var resolver = new FakeIdentityResolver(numericId: 12345);
        var service = new CompteRenduService(repo, resolver);

        await service.CreateAsync(publicGuid.ToString("D"), new CreateCompteRenduRequest());

        Assert.Equal(1, repo.CreateCallCount);
        Assert.Equal("12345", repo.LastRendezVousId);
        Assert.Equal(publicGuid, resolver.LastResolvedGuid);
    }

    [Fact]
    public void Service_ImplementsICompteRenduService()
    {
        Assert.True(typeof(ICompteRenduService).IsAssignableFrom(typeof(CompteRenduService)));
    }

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

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

    // =========================================================================
    // FAKES
    // =========================================================================

    private sealed class FakeCompteRenduRepository : ICompteRenduRepository
    {
        private readonly CompteRendu? _existing;

        public FakeCompteRenduRepository(CompteRendu? existing)
        {
            _existing = existing;
        }

        public int CreateCallCount { get; private set; }

        public string? LastRendezVousId { get; private set; }

        public CompteRenduCreateCommand? LastCommand { get; private set; }

        public Task<CompteRendu?> GetByRendezVousAsync(string rendezVousId, CancellationToken cancellationToken = default)
            => Task.FromResult(_existing);

        public Task<CompteRendu> CreateAsync(string rendezVousId, CompteRenduCreateCommand command, CancellationToken cancellationToken = default)
        {
            CreateCallCount++;
            LastRendezVousId = rendezVousId;
            LastCommand = command;

            var created = new CompteRendu
            {
                Id = Guid.NewGuid(),
                NoteCollaborateur = command.NoteCollaborateur,
                NomSignataire = command.NomSignataire,
                NoteSignataire = command.NoteSignataire,
                NomSignataireTech = command.NomSignataireTech,
                DevisConforme = command.DevisConforme,
                AvecReserve = command.AvecReserve,
                ReserveCommentaire = command.ReserveCommentaire
            };

            return Task.FromResult(created);
        }
    }

    private sealed class FakeIdentityResolver : IMobileEntityIdentityResolver
    {
        private readonly long? _numericId;

        public FakeIdentityResolver(long? numericId = null)
        {
            _numericId = numericId;
        }

        public Guid? LastResolvedGuid { get; private set; }

        public Guid CreateCanonicalIdentity(string entityType, PhysicalEntityIdentity physical)
            => physical.Guid ?? Guid.NewGuid();

        public PhysicalEntityIdentity? ResolvePhysicalIdentity(string entityType, Guid publicGuid)
        {
            LastResolvedGuid = publicGuid;
            return _numericId is { } numericId
                ? new PhysicalEntityIdentity { NumericId = numericId }
                : null;
        }

        public bool IsCanonical(string entityType, Guid publicGuid) => true;
    }

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

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

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

        var properties = type.GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.NonPublic | System.Reflection.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);
    }
}