"""
Pruebas de _build_move_clauses: nombres únicos por archivo lógico (G4),
evitando colisiones con múltiples data files / logs y sin descartar otros tipos.
"""
from app.sql.sql_manager import SQLServerManager, LogicalFile


def _paths(clauses):
    """Extrae las rutas destino (lo que va tras 'TO N') de cada cláusula MOVE."""
    out = []
    for c in clauses:
        # MOVE N'logico' TO N'ruta'
        ruta = c.split("TO N'")[1].rstrip("'")
        out.append(ruta)
    return out


def test_un_data_un_log():
    files = [
        LogicalFile("EMP_dat", "X.mdf", "D"),
        LogicalFile("EMP_log", "X.ldf", "L"),
    ]
    clauses = SQLServerManager._build_move_clauses("EMP", "C:\\D", files)
    rutas = _paths(clauses)
    assert rutas == ["C:\\D\\EMP.mdf", "C:\\D\\EMP_log.ldf"]


def test_multiples_data_files_sin_colision():
    files = [
        LogicalFile("d1", "a.mdf", "D"),
        LogicalFile("d2", "b.ndf", "D"),
        LogicalFile("d3", "c.ndf", "D"),
        LogicalFile("l1", "a.ldf", "L"),
    ]
    clauses = SQLServerManager._build_move_clauses("EMP", "C:\\D", files)
    rutas = _paths(clauses)
    assert rutas == [
        "C:\\D\\EMP.mdf",
        "C:\\D\\EMP_1.ndf",
        "C:\\D\\EMP_2.ndf",
        "C:\\D\\EMP_log.ldf",
    ]
    # No debe haber rutas duplicadas (la causa del bug original).
    assert len(set(rutas)) == len(rutas)


def test_multiples_logs_sin_colision():
    files = [
        LogicalFile("d1", "a.mdf", "D"),
        LogicalFile("l1", "a.ldf", "L"),
        LogicalFile("l2", "b.ldf", "L"),
    ]
    rutas = _paths(SQLServerManager._build_move_clauses("EMP", "C:\\D", files))
    assert rutas == ["C:\\D\\EMP.mdf", "C:\\D\\EMP_log.ldf", "C:\\D\\EMP_log_1.ldf"]
    assert len(set(rutas)) == len(rutas)


def test_tipo_no_data_ni_log_no_se_descarta():
    # Tipos como FILESTREAM/full-text (p. ej. 'S') deben moverse, no ignorarse.
    files = [
        LogicalFile("d1", "a.mdf", "D"),
        LogicalFile("l1", "a.ldf", "L"),
        LogicalFile("fs stream!", "fs", "S"),
    ]
    clauses = SQLServerManager._build_move_clauses("EMP", "C:\\D", files)
    assert len(clauses) == 3  # ninguno descartado
    rutas = _paths(clauses)
    # El nombre lógico se sanea (no alfanumérico → '_').
    assert "C:\\D\\EMP_fs_stream_" in rutas[2]
    assert len(set(rutas)) == len(rutas)


def test_cada_archivo_logico_genera_una_clausula():
    files = [LogicalFile(f"f{i}", f"f{i}", "D") for i in range(5)]
    clauses = SQLServerManager._build_move_clauses("DB", "C:\\D", files)
    assert len(clauses) == 5
    assert len(set(_paths(clauses))) == 5  # todas únicas