"""Tests für die puren Pre-Scan-/OMDb-Helfer (Label-Normalisierung, Parsing)."""

from clients.omdb import parse_runtime_minutes, parse_year
from prescan.prescan import normalize_disc_label, parse_udf_dstring


def test_udf_dstring_latin1():
    # d-string: [comp_id=8]["MEIN_FILM"][padding][len=10]
    daten = bytes([8]) + b"MEIN_FILM" + bytes(21) + bytes([10])
    assert parse_udf_dstring(daten) == "MEIN_FILM"


def test_udf_dstring_utf16():
    text = "FILM".encode("utf-16-be")
    daten = bytes([16]) + text + bytes(32 - 2 - len(text)) + bytes([1 + len(text)])
    assert parse_udf_dstring(daten) == "FILM"


def test_udf_dstring_kaputt_gibt_leer():
    assert parse_udf_dstring(b"") == ""
    assert parse_udf_dstring(bytes(32)) == ""          # Länge 0
    daten = bytes([8]) + b"X" + bytes(29) + bytes([99])  # Länge > Puffer
    assert parse_udf_dstring(daten) == ""


def test_label_normalisierung():
    # Disc-Labels sind fast immer GROSS_MIT_UNTERSTRICHEN
    assert normalize_disc_label("PULP_FICTION") == "Pulp Fiction"
    assert normalize_disc_label("DIE_HARD_4.0_DE") == "Die Hard 4 0 De"
    assert normalize_disc_label("  doppel  raum ") == "doppel raum"
    assert normalize_disc_label("") == ""


def test_label_mit_gemischter_schreibung_bleibt():
    # Wer schon sauber benannt hat, wird nicht plattgewalzt
    assert normalize_disc_label("Inception") == "Inception"


def test_omdb_runtime_parsing():
    assert parse_runtime_minutes("142 min") == 142
    assert parse_runtime_minutes("N/A") == 0
    assert parse_runtime_minutes("") == 0


def test_omdb_jahr_parsing():
    assert parse_year("1999") == 1999
    assert parse_year("2005–2012") == 2005  # Serien-Zeitspanne
    assert parse_year("N/A") is None
    assert parse_year("") is None