using Microsoft.Data.SqlClient;
using Respawn;
using SIGCM2.Infrastructure.Persistence;

namespace SIGCM2.Application.Tests.Integration;

[Collection("Database")]
public class UsuarioRepositoryTests : IAsyncLifetime
{
    private const string ConnectionString =
        "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";

    private SqlConnection _connection = null!;
    private Respawner _respawner = null!;
    private UsuarioRepository _repository = null!;

    public async Task InitializeAsync()
    {
        _connection = new SqlConnection(ConnectionString);
        await _connection.OpenAsync();

        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
        {
            DbAdapter = DbAdapter.SqlServer
        });

        // Reset DB and seed admin user for each test class run
        await _respawner.ResetAsync(_connection);
        await SeedAdminAsync();

        var factory = new SqlConnectionFactory(ConnectionString);
        _repository = new UsuarioRepository(factory);
    }

    public async Task DisposeAsync()
    {
        await _respawner.ResetAsync(_connection);
        await _connection.CloseAsync();
        await _connection.DisposeAsync();
    }

    // Scenario: GetByUsername returns correct entity when user exists
    [Fact]
    public async Task GetByUsernameAsync_ExistingUser_ReturnsUsuario()
    {
        var usuario = await _repository.GetByUsernameAsync("admin");

        Assert.NotNull(usuario);
        Assert.Equal("admin", usuario.Username);
        Assert.Equal("admin", usuario.Rol);
        Assert.True(usuario.Activo);
        Assert.False(string.IsNullOrWhiteSpace(usuario.PasswordHash));
    }

    // Triangulation: GetByUsername returns null when user does not exist
    [Fact]
    public async Task GetByUsernameAsync_NonExistentUser_ReturnsNull()
    {
        var usuario = await _repository.GetByUsernameAsync("noexiste");
        Assert.Null(usuario);
    }

    // Triangulation: case-sensitive username lookup (SQL Server UNIQUE constraint is case-insensitive by default)
    [Fact]
    public async Task GetByUsernameAsync_DifferentUser_ReturnsCorrectUser()
    {
        // Insert a second user
        await _connection.ExecuteAsync(
            "INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson) " +
            "VALUES ('vendedor1', '$2a$12$hash2', 'Juan', 'Pérez', 'vendedor', '[]')");

        var admin = await _repository.GetByUsernameAsync("admin");
        var vendedor = await _repository.GetByUsernameAsync("vendedor1");

        Assert.NotNull(admin);
        Assert.NotNull(vendedor);
        Assert.NotEqual(admin.Id, vendedor.Id);
        Assert.Equal("admin", admin.Rol);
        Assert.Equal("vendedor", vendedor.Rol);
    }

    private async Task SeedAdminAsync()
    {
        await _connection.ExecuteAsync(
            "SET QUOTED_IDENTIFIER ON; " +
            "IF NOT EXISTS (SELECT 1 FROM dbo.Usuario WHERE Username = 'admin') " +
            "INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo) " +
            "VALUES ('admin', '$2a$12$rmq6tlSAQ8WXhR2CwLCSeuwCJKz/.8Eab95UQCUNfwe4dokeOqMcW', " +
            "'Administrador', 'Sistema', 'admin', '[\"*\"]', 1)");
    }
}

// Dapper extension helper for IDbConnection
file static class DapperHelper
{
    public static async Task ExecuteAsync(this SqlConnection conn, string sql)
    {
        using var cmd = conn.CreateCommand();
        cmd.CommandText = sql;
        await cmd.ExecuteNonQueryAsync();
    }
}