using System;
using System.IO;
using Omika.App.Local.Security;

namespace Omika.Tests.Mobile.Local;

/// <summary>
/// Tests de la distinction « mise à niveau d'une installation existante » vs
/// « installation vierge / réinstallation », utilisée par iOS pour décider de
/// purger ou non le Keychain. Aucun runtime iOS requis : logique pure.
/// </summary>
public class InstallationBootstrapperTests
{
    private static string NewTempDir()
    {
        string dir = Path.Combine(Path.GetTempPath(), "omika-boot-" + Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(dir);
        return dir;
    }

    private static void DeleteDir(string dir)
    {
        try { Directory.Delete(dir, recursive: true); }
        catch { /* best-effort */ }
    }

    [Theory]
    [InlineData(true, true, InstallationKind.Normal)]
    [InlineData(true, false, InstallationKind.Normal)]
    [InlineData(false, true, InstallationKind.Upgrade)]
    [InlineData(false, false, InstallationKind.FreshInstall)]
    public void Decide_RetourneLaBonneNature(bool marker, bool proof, InstallationKind expected)
        => Assert.Equal(expected, InstallationBootstrapper.Decide(marker, proof));

    [Fact]
    public void Decide_MarkerPresent_ToujoursNormal()
        => Assert.Equal(InstallationKind.Normal, InstallationBootstrapper.Decide(markerExists: true, hasHistoricalProof: false));

    [Fact]
    public void Decide_MarkerAbsentSansPreuve_FreshInstall()
        => Assert.Equal(InstallationKind.FreshInstall, InstallationBootstrapper.Decide(markerExists: false, hasHistoricalProof: false));

    [Fact]
    public void Decide_MarkerAbsentAvecPreuve_Upgrade()
        => Assert.Equal(InstallationKind.Upgrade, InstallationBootstrapper.Decide(markerExists: false, hasHistoricalProof: true));

    [Fact]
    public void HasHistoricalProof_DossierInexistant_False()
        => Assert.False(InstallationBootstrapper.HasHistoricalProof(Path.Combine(Path.GetTempPath(), "omika-absent-" + Guid.NewGuid().ToString("N"))));

    [Fact]
    public void HasHistoricalProof_DossierVide_False()
    {
        string dir = NewTempDir();
        try
        {
            Assert.False(InstallationBootstrapper.HasHistoricalProof(dir));
        }
        finally { DeleteDir(dir); }
    }

    [Theory]
    [InlineData("device.id")]
    [InlineData("omika.db")]
    [InlineData("session.token")]
    [InlineData("session.token.secure")]
    public void HasHistoricalProof_TracePresente_True(string fileName)
    {
        string dir = NewTempDir();
        try
        {
            File.WriteAllText(Path.Combine(dir, fileName), "x");
            Assert.True(InstallationBootstrapper.HasHistoricalProof(dir));
        }
        finally { DeleteDir(dir); }
    }
}