using Omika.Data.Repositories;

namespace Omika.Tests.Data;

/// <summary>
/// Tests de la résolution répertoire par répertoire des documents (ancres #id).
/// Le chemin est reconstruit depuis la structure Omika :
/// <c>[LI_CodeLieu] #[LI_PKID]\[CL_Nom] #[CL_PKID]\[IN_RefInterne] #[IN_PKID]\$DC_Categorie_Id$</c>.
/// Objectif : retrouver le répertoire existant même si un libellé a été modifié ou
/// contient des espaces en trop, sans jamais créer de doublon — et sans jamais
/// lancer de recherche sur le chemin complet.
/// </summary>
public class DocumentAnchoredPathTests : IDisposable
{
    private const string ExpectedPath =
        @"402 ORCHIDEES 2 #3512\Dupont #12\INT-0001 #3401\Photos #46";

    private readonly string _root;

    public DocumentAnchoredPathTests()
    {
        _root = Path.Combine(Path.GetTempPath(), "omika-anchors", Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(_root);
    }

    public void Dispose()
    {
        if (Directory.Exists(_root))
        {
            Directory.Delete(_root, recursive: true);
        }
    }

    // --- Extraction de l'ancre ------------------------------------------------

    [Fact]
    public void TryParseAnchor_ExtraitLeDernierIdentifiant()
    {
        bool parsed = DocumentPathResolver.TryParseAnchor("Dupont #2 #3512", out string label, out long id);

        Assert.True(parsed);
        Assert.Equal(3512, id);
        Assert.Equal("Dupont #2", label);
    }

    [Fact]
    public void TryParseAnchor_TolereLesEspacesAutourDuDiese()
    {
        Assert.True(DocumentPathResolver.TryParseAnchor("Photos # 46", out _, out long id1));
        Assert.Equal(46, id1);

        Assert.True(DocumentPathResolver.TryParseAnchor("Photos  #46", out _, out long id2));
        Assert.Equal(46, id2);
    }

    [Fact]
    public void TryParseAnchor_SansIdentifiant_RetourneFaux()
    {
        Assert.False(DocumentPathResolver.TryParseAnchor("Intervention", out string label, out long id));
        Assert.Equal(0, id);
        Assert.Equal("Intervention", label);
    }

    [Fact]
    public void NormalizeSegmentName_CompacteLesEspacesEtLaCasse()
    {
        Assert.Equal(
            DocumentPathResolver.NormalizeSegmentName("402 ORCHIDEES 2 #3512"),
            DocumentPathResolver.NormalizeSegmentName("402  ORCHIDEES 2 #3512"));
    }

    // --- Recherche du fichier -------------------------------------------------

    [Fact]
    public void RetrouveLeFichier_MalgreUnEspaceDoubleDansLeRepertoireRacine()
    {
        // Le disque porte « 402  ORCHIDEES 2 #3512 » (deux espaces), la base produit
        // « 402 ORCHIDEES 2 #3512 » (un seul).
        string actualDirectory = CreateDirectoryWithFile(@"402  ORCHIDEES 2 #3512\Dupont #12\INT-0001 #3401\Photos #46");

        string? found = DocumentPathResolver.ResolveAnchoredDocumentFile(
            _root, ExpectedPath, "photo.jpg", Guid.Empty);

        Assert.NotNull(found);
        Assert.Equal(
            Path.GetFullPath(Path.Combine(actualDirectory, "photo.jpg")),
            Path.GetFullPath(found!));
    }

    [Fact]
    public void RetrouveLeFichier_MalgreUnLibelleModifie()
    {
        // Le client a été renommé : le disque porte « Dupont SA #12 », la base produit
        // « Dupont #12 ». L'ancre #12 reste identique.
        string actualDirectory = CreateDirectoryWithFile(@"402 ORCHIDEES 2 #3512\Dupont SA #12\INT-0001 #3401\Photos #46");

        string? found = DocumentPathResolver.ResolveAnchoredDocumentFile(
            _root, ExpectedPath, "photo.jpg", Guid.Empty);

        Assert.NotNull(found);
        Assert.Equal(
            Path.GetFullPath(Path.Combine(actualDirectory, "photo.jpg")),
            Path.GetFullPath(found!));
    }

    [Fact]
    public void RetrouveLeFichier_QuandLeSegmentDeCategorieEstAbsent()
    {
        // Document historique : pas de sous-répertoire de catégorie sur le disque.
        string interventionDirectory = CreateDirectoryWithFile(@"402 ORCHIDEES 2 #3512\Dupont #12\INT-0001 #3401");

        string? found = DocumentPathResolver.ResolveAnchoredDocumentFile(
            _root, ExpectedPath, "photo.jpg", Guid.Empty);

        Assert.NotNull(found);
        Assert.Equal(
            Path.GetFullPath(Path.Combine(interventionDirectory, "photo.jpg")),
            Path.GetFullPath(found!));
    }

    [Fact]
    public void NeDescendPas_QuandUnNiveauIntermediaireManque()
    {
        // Le répertoire du client est absent : la descente doit s'arrêter là et ne
        // jamais partir en recherche sur le chemin complet.
        CreateDirectoryWithFile(@"402 ORCHIDEES 2 #3512\INT-0001 #3401\Photos #46");

        string? found = DocumentPathResolver.ResolveAnchoredDocumentFile(
            _root, ExpectedPath, "photo.jpg", Guid.Empty);

        Assert.Null(found);
    }

    [Fact]
    public void NeConfondPasDeuxIdentifiantsProches()
    {
        // #3512 attendu, le disque porte #13512 : aucune correspondance.
        CreateDirectoryWithFile(@"402 ORCHIDEES 2 #13512\Dupont #12\INT-0001 #3401\Photos #46");

        string? found = DocumentPathResolver.ResolveAnchoredDocumentFile(
            _root, ExpectedPath, "photo.jpg", Guid.Empty);

        Assert.Null(found);
    }

    // --- Création : réutilisation sans doublon --------------------------------

    [Fact]
    public void Creation_ReutiliseLeRepertoireExistant()
    {
        string existing = CreateDirectoryWithFile(@"402  ORCHIDEES 2 #3512\Dupont SA #12\INT-0001 #3401\Photos #46");
        int directoriesBefore = Directory.GetDirectories(_root, "*", SearchOption.AllDirectories).Length;

        DocumentPathResolver.AnchorResolution resolution = DocumentPathResolver.EnsureAnchoredDirectory(
            _root, DocumentPathResolver.ParseAnchors(ExpectedPath));

        // Le répertoire réel (deux espaces, libellé « Dupont SA ») est réutilisé tel quel.
        Assert.NotNull(resolution.RelativeDirectory);
        Assert.Equal(
            Path.GetFullPath(existing),
            Path.GetFullPath(Path.Combine(_root, resolution.RelativeDirectory!)));

        // Aucun répertoire concurrent n'a été créé.
        Assert.Equal(directoriesBefore, Directory.GetDirectories(_root, "*", SearchOption.AllDirectories).Length);
        Assert.False(Directory.Exists(Path.Combine(_root, @"402 ORCHIDEES 2 #3512")));
    }

    [Fact]
    public void Creation_AjouteUniquementLesSegmentsManquants()
    {
        // Client et intervention existent, la catégorie manque.
        string interventionDirectory = Path.Combine(_root, @"402 ORCHIDEES 2 #3512\Dupont #12\INT-0001 #3401");
        Directory.CreateDirectory(interventionDirectory);
        Directory.CreateDirectory(Path.Combine(_root, @"402 ORCHIDEES 2 #3512\Dupont #12"));

        DocumentPathResolver.AnchorResolution resolution = DocumentPathResolver.EnsureAnchoredDirectory(
            _root, DocumentPathResolver.ParseAnchors(ExpectedPath));

        Assert.True(resolution.IsComplete);
        Assert.Equal(4, resolution.ResolvedDepth);

        string expectedFinal = Path.Combine(interventionDirectory, "Photos #46");
        Assert.Equal(Path.GetFullPath(expectedFinal), Path.GetFullPath(resolution.FullDirectory!));
        Assert.True(Directory.Exists(expectedFinal));
    }

    [Fact]
    public void Creation_DepuisUneRacineVide_CreeTouteLArborescence()
    {
        DocumentPathResolver.AnchorResolution resolution = DocumentPathResolver.EnsureAnchoredDirectory(
            _root, DocumentPathResolver.ParseAnchors(ExpectedPath));

        Assert.True(resolution.IsComplete);
        Assert.Equal(
            Path.GetFullPath(Path.Combine(_root, ExpectedPath)),
            Path.GetFullPath(resolution.FullDirectory!));
    }

    [Fact]
    public void ParseAnchors_IgnoreLesSeparateursMultiples()
    {
        IReadOnlyList<DocumentPathResolver.AnchoredSegment> segments =
            DocumentPathResolver.ParseAnchors(@"\\402 ORCHIDEES 2 #3512\\Dupont #12\");

        Assert.Equal(2, segments.Count);
        Assert.Equal(3512, segments[0].Id);
        Assert.Equal(12, segments[1].Id);
    }

    private string CreateDirectoryWithFile(string relativeDirectory)
    {
        string directory = Path.Combine(_root, relativeDirectory);
        Directory.CreateDirectory(directory);
        File.WriteAllBytes(Path.Combine(directory, "photo.jpg"), [1, 2, 3]);
        return directory;
    }
}