using System.Security.Cryptography;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using SIGCM2.Application.Abstractions.Security;
using SIGCM2.Infrastructure.Security;
using Xunit;

namespace SIGCM2.TestSupport;

/// <summary>
/// WebApplicationFactory for integration tests against SIGCM2.Api.
/// Uses SIGCM2_Test database (separate from production SIGCM2).
/// </summary>
public sealed class TestWebAppFactory : WebApplicationFactory<Program>, IAsyncLifetime
{
    private const string TestConnectionString =
        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";

    // Resolved once — absolute paths independent of working directory
    private static readonly string RepoRoot = ResolveRepoRoot();
    private static readonly string PrivateKeyPath = Path.Combine(RepoRoot, "src", "api", "SIGCM2.Api", "keys", "private.pem");
    private static readonly string PublicKeyPath  = Path.Combine(RepoRoot, "src", "api", "SIGCM2.Api", "keys", "public.pem");

    private readonly SqlTestFixture _dbFixture = new(TestConnectionString);

    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        // Step 1: Override configuration BEFORE services are built
        builder.ConfigureAppConfiguration((ctx, config) =>
        {
            // Clear all existing sources and rebuild with test values
            // This ensures our paths win over appsettings.json
            config.AddInMemoryCollection(new Dictionary<string, string?>
            {
                ["ConnectionStrings:SqlServer"]  = TestConnectionString,
                ["Jwt:Issuer"]                   = "sigcm2.api",
                ["Jwt:Audience"]                 = "sigcm2.web",
                ["Jwt:AccessTokenMinutes"]        = "60",
                ["Jwt:RefreshTokenDays"]          = "7",
                ["Jwt:PrivateKeyPath"]            = PrivateKeyPath,
                ["Jwt:PublicKeyPath"]             = PublicKeyPath,
                ["Jwt:PrivateKey"]                = null,
                ["Jwt:PublicKey"]                 = null,
                ["Cors:AllowedOrigins:0"]         = "http://localhost:5173",
                ["Serilog:MinimumLevel:Default"]  = "Warning",
            });
        });

        builder.UseEnvironment("Testing");
    }

    public async Task InitializeAsync()
    {
        await _dbFixture.InitializeAsync();
    }

    public new async Task DisposeAsync()
    {
        await _dbFixture.DisposeAsync();
        await base.DisposeAsync();
    }

    private static string ResolveRepoRoot()
    {
        // Walk up from AppContext.BaseDirectory looking for SIGCM2.slnx
        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        while (dir is not null)
        {
            if (dir.GetFiles("SIGCM2.slnx").Length > 0)
                return dir.FullName;
            dir = dir.Parent;
        }

        // Walk up from assembly location
        var assemblyLocation = typeof(TestWebAppFactory).Assembly.Location;
        dir = new DirectoryInfo(Path.GetDirectoryName(assemblyLocation)!);
        while (dir is not null)
        {
            if (dir.GetFiles("SIGCM2.slnx").Length > 0)
                return dir.FullName;
            dir = dir.Parent;
        }

        // Known absolute path (last resort for this machine)
        const string knownPath = @"E:\SIG-CM2.0";
        if (Directory.Exists(knownPath) && File.Exists(Path.Combine(knownPath, "SIGCM2.slnx")))
            return knownPath;

        throw new InvalidOperationException(
            $"Could not find repo root containing SIGCM2.slnx. " +
            $"AppContext.BaseDirectory: {AppContext.BaseDirectory}");
    }
}