using Dapper;
using Microsoft.Data.SqlClient;
using Respawn;
using Xunit;

namespace SIGCM2.TestSupport;

/// <summary>
/// Manages a real SQL Server test database.
/// Resets state between test runs using Respawn.
/// Seeds the admin user after each reset.
/// </summary>
public sealed class SqlTestFixture : IAsyncLifetime
{
    private readonly string _connectionString;
    private SqlConnection _connection = null!;
    private Respawner _respawner = null!;

    public SqlTestFixture(string connectionString)
    {
        _connectionString = connectionString;
    }

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

        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
        {
            DbAdapter = DbAdapter.SqlServer,
            // Rol is a lookup table seeded by migration V003 — never wipe or Usuario FK breaks.
            TablesToIgnore = [new Respawn.Graph.Table("dbo", "Rol")]
        });

        await ResetAndSeedAsync();
    }

    public async Task ResetAndSeedAsync()
    {
        await _respawner.ResetAsync(_connection);
        await SeedRolCanonicalAsync();
        await SeedAdminAsync();
    }

    private async Task SeedRolCanonicalAsync()
    {
        const string sql = """
            SET QUOTED_IDENTIFIER ON;
            MERGE dbo.Rol AS t
            USING (VALUES
                ('admin', N'Administrador', N'Supervisor total'),
                ('cajero', N'Cajero', N'Mostrador contado'),
                ('operador_ctacte', N'Operador Cta Cte', N'Cuenta corriente'),
                ('picadora', N'Picadora/Correctora', N'Edición de textos'),
                ('jefe_publicidad', N'Jefe de Publicidad', N'Supervisión de pauta'),
                ('productor', N'Productor', N'Carga restringida'),
                ('diagramacion', N'Diagramación/Taller', N'Solo lectura pauta'),
                ('reportes', N'Reportes', N'Solo lectura reportes')
            ) AS s (Codigo, Nombre, Descripcion)
            ON t.Codigo = s.Codigo
            WHEN NOT MATCHED BY TARGET THEN
                INSERT (Codigo, Nombre, Descripcion, Activo)
                VALUES (s.Codigo, s.Nombre, s.Descripcion, 1);
            """;
        await _connection.ExecuteAsync(sql);
    }

    public async Task DisposeAsync()
    {
        if (_connection is not null)
        {
            await _connection.CloseAsync();
            await _connection.DisposeAsync();
        }
    }

    private async Task SeedAdminAsync()
    {
        const string sql = """
            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
            );
            """;
        await _connection.ExecuteAsync(sql);
    }
}