"""
Tests for indexer/title_parse.py — synthetic filenames only, one per
docs/mediacenter.md §3.3/§3.4 rule. The real ~1950-file library validation
is a manual acceptance step (§11), not something this repo's corpus holds.
"""

from meshbay_node.indexer.title_parse import (
    ParsedName,
    clean_query,
    has_episode_marker,
    leading_episode_number,
    naive_title,
    parse_episode_filename,
    parse_movie_filename,
    season_from_folder_name,
    sequel_variants,
    year_in,
)


# ── §3.3 row: plain, well-formed movie filename ──────────────────────────────

def test_plain_movie_filename_parses_confidently():
    r = parse_movie_filename("The.Great.Adventure.2015.1080p.BluRay.x264.mkv")
    assert r.display_title == "The Great Adventure"
    assert r.year == 2015
    assert r.confidence is True


# ── §3.3 row 1: real title in alternative_title ──────────────────────────────

def test_franchise_numeric_code_exposes_alternative_title():
    r = parse_movie_filename("Franchise.007.-.The.Real.Subtitle.1999.720p.mkv")
    assert r.year == 1999
    # guessit lands the franchise fragment in title and the real subtitle in
    # alternative_title — both must be surfaced so a caller (tmdb.py) can
    # try either, per the design doc's "search both fields" fix.
    assert r.alt_title is not None


# ── §3.3 row 2: hyphenated title split before a parenthesized year ───────────

def test_naive_title_normalizes_hyphens_dots_and_underscores():
    nt = naive_title("Hero-Name.(2002).DVDRip.XviD-GROUP.avi")
    assert "-" not in nt
    assert "." not in nt
    assert "_" not in nt
    assert "2002" not in nt  # the year itself is stripped, not just its parens
    assert "Hero" in nt and "Name" in nt


# ── §3.3 row 3: French edition vocabulary stuck to the title ─────────────────

def test_french_edition_phrases_are_stripped():
    r = parse_movie_filename("Some.Movie.Version.Longue.2010.mkv")
    assert "version" not in (r.display_title or "").lower()
    assert "longue" not in (r.display_title or "").lower()

    r2 = parse_movie_filename("Autre.Film.Remasterise.1998.mkv")
    assert "remasteris" not in (r2.display_title or "").lower()


# ── §3.3 row 4: trailing sequel digit / Roman numeral ────────────────────────

def test_sequel_variants_strips_digit_and_offers_roman_numeral():
    variants = sequel_variants("Some Sequel 2")
    assert "Some Sequel" in variants
    assert "Some Sequel II" in variants


def test_sequel_variants_empty_when_no_trailing_digit():
    assert sequel_variants("Some Movie") == []


# ── §10.1/V10: wider sequel-index handling ──────────────────────────────────

def test_sequel_variants_roman_numeral_offers_the_digit_form():
    v = sequel_variants("Old Frontier III")
    assert "Old Frontier" in v
    assert "Old Frontier 3" in v


def test_sequel_variants_rewrites_a_part_keyword_index_but_keeps_the_name():
    # §10.1/V14: with a "Part"/"Episode"/… keyword the bare base is
    # withheld — "Some Saga" alone collides with a franchise-origin film.
    v = sequel_variants("Some Saga Part 2")
    assert "Some Saga II" in v
    assert "Some Saga 2" in v
    assert "Some Saga" not in v


def test_sequel_variants_reads_a_spelled_out_index():
    v = sequel_variants("Story Chapter Three")
    assert "Story 3" in v and "Story III" in v
    assert "Story" not in v  # keyword present -> no bare base


def test_sequel_variants_saga_shape_does_not_offer_the_bare_franchise():
    # Every "<Saga> Chapter <N>" was matching the franchise's first entry
    # because the bare "<Saga>" variant hit it at ratio 1.0 (§10.1/V14).
    v = sequel_variants("Some Saga Chapter III")
    assert "Some Saga" not in v
    assert "Some Saga 3" in v


def test_sequel_variants_ignores_a_trailing_word_that_is_not_an_index():
    assert sequel_variants("The Dark Knight") == []
    assert sequel_variants("In Bruges") == []


def test_sequel_variants_ignores_a_four_digit_year_suffix():
    assert sequel_variants("Blade Runner 2049") == []


def test_year_in_lifts_a_year_from_a_show_folder_name():
    assert year_in("Some.Show.2022.S01") == 2022
    assert year_in("Some Show") is None
    assert year_in("Episode 100 of 2010") == 2010


def test_clean_query_despaces_a_folder_name_without_eating_the_last_word():
    # naive_title would rsplit on the last dot and drop ".Name"
    assert clean_query("Some.Show.Name") == "Some Show Name"
    assert clean_query("Some.Show.Name.S01") == "Some Show Name S01"
    assert naive_title("Some.Show.Name") != "Some Show Name"  # the trap it avoids


# ── §10.1/V14: telling a real episode marker from a mangled number ──────────

def test_has_episode_marker_accepts_real_markers():
    for name in ["Some.Show.S01E08.mkv", "some.show.s1.e8.mkv",
                 "Some Show 1x08.mkv", "Some Show 01x08.mkv",
                 "Some Show Episode 8.mkv", "Some Show ep08.mkv",
                 "Some Show ep.8.mkv", "Some Show Season 1.mkv",
                 "Une Serie Saison 3.mkv"]:
        assert has_episode_marker(name), name


def test_has_episode_marker_rejects_bare_numbers_and_ordinary_words():
    # "1080p" truncated to "108", "1280" left in, a year, plain words that
    # merely contain "ep" — none of these are episode markers.
    for name in ["Some.Film.2017.MULTI.108.grp.mkv",
                 "Some.Flick.2013.1280.x264-grp.mkv",
                 "Some Movie 2017.mkv", "The Dark Knight.mkv",
                 "Sleep 8.mkv", "Deep 8 mm.mkv", "Ocean's 11.mkv"]:
        assert not has_episode_marker(name), name


# ── bug 2026-08-29: guessit peels "Volume N" off the title ─────────────────

def test_movie_volume_number_is_folded_back_into_the_title():
    # guessit parses both to title="Some Saga" + volume=1/2; leaving it that
    # way collapsed the two parts onto one TMDB match and made "Fix match"
    # (grouped by display_title) unable to separate them.
    r1 = parse_movie_filename("Some.Saga.Volume.1.2003.mkv")
    r2 = parse_movie_filename("Some.Saga.Volume.2.2004.mkv")
    assert r1.display_title == "Some Saga 1"
    assert r2.display_title == "Some Saga 2"
    assert r1.display_title != r2.display_title
    assert r1.year == 2003 and r2.year == 2004


def test_movie_without_a_volume_token_is_unchanged():
    # the "3" is already part of guessit's title here, not a volume field
    r = parse_movie_filename("Old.Frontier.3.2001.mkv")
    assert r.display_title == "Old Frontier 3"


# ── §3.3 row 6: no usable title at all ───────────────────────────────────────

def test_low_confidence_when_no_title_or_year():
    r = parse_movie_filename("abc123.mkv")
    assert r.confidence is False
    # the mandated fallback is always available regardless
    assert r.naive_title == "abc123"


# ── §3.2/§3.4: episode filename with no show name at all ─────────────────────

def test_episode_only_filename_has_no_title_but_has_season_episode():
    r = parse_episode_filename("S08E02.SUBFRENCH.720p.mkv")
    assert r.display_title is None
    assert r.season == 8
    assert r.episode == 2
    # confidence is False (no title yet) — the indexer must supply one from
    # a representative sibling filename in the same folder, per §3.4.
    assert r.confidence is False


def test_episode_filename_with_show_name_parses_confidently():
    r = parse_episode_filename("Some.Show.Name.S02E05.720p.WEB.mkv")
    assert r.display_title == "Some Show Name"
    assert r.season == 2
    assert r.episode == 5
    assert r.confidence is True


# ── §3.4: season-like ancestor folders, including non-English vocabulary ────

def test_season_folder_english():
    assert season_from_folder_name("Season 2") == 2


def test_season_folder_french_word():
    assert season_from_folder_name("Saison 3") == 3


def test_season_folder_roman_numeral():
    assert season_from_folder_name("Saison IV") == 4


def test_season_folder_book_word_roman_numeral():
    # Some shows number their seasons by "book" (Roman numerals) rather
    # than "season"/"saison" — real, observed vocabulary (§3.4).
    assert season_from_folder_name("Livre I") == 1
    assert season_from_folder_name("Livre VI") == 6


def test_season_folder_bare_s_abbreviation():
    # A common abbreviated convention distinct from SEASON_WORDS' full
    # words — found live: a show with "S1"/"S2"/"S3" folders instead of
    # "Season 1" etc, exactly the shape that grouped its later seasons as
    # loose individual entries rather than under the show.
    assert season_from_folder_name("S1") == 1
    assert season_from_folder_name("S2") == 2
    assert season_from_folder_name("S02") == 2


def test_season_folder_bare_s_abbreviation_does_not_match_inside_a_longer_name():
    # Anchored to the whole folder name — a real folder that merely starts
    # with "S" followed by digits somewhere in a longer, unrelated name
    # must not be read as a season abbreviation.
    assert season_from_folder_name("S1 Extended Cut") is None
    assert season_from_folder_name("Something2") is None


def test_specials_folder_maps_to_season_zero():
    assert season_from_folder_name("Specials") == 0
    assert season_from_folder_name("Bonus") == 0
    assert season_from_folder_name("Extras") == 0


def test_non_season_folder_name_returns_none():
    assert season_from_folder_name("Some Show Name") is None


# ── §3.4c: a bare leading episode number, guessit's 3-digit blind spot ───────

def test_leading_episode_number_reads_the_whole_number():
    assert leading_episode_number("001    Episode's Own Title.mkv") == 1
    assert leading_episode_number("099    Episode's Own Title.mkv") == 99


def test_leading_episode_number_not_split_by_guessit_at_three_digits():
    # The real bug this guards: guessit itself reads a bare "100" as season=1,
    # episode=0 (a concatenated SxxE guess), not episode=100 — silently, with
    # nothing in its output telling apart a real 2-digit episode from this.
    assert leading_episode_number("100    Episode's Own Title.mkv") == 100


def test_leading_episode_number_ignores_a_leading_year():
    # Four digits, not the 1-3 an episode-number prefix can be — this is a
    # normal movie filename shape, not an episode number.
    assert leading_episode_number("2010 - Some Movie.mkv") is None


def test_leading_episode_number_none_without_a_leading_number():
    assert leading_episode_number("Some Show.S01E01.mkv") is None


def test_parsed_name_is_a_plain_dataclass():
    # sanity: constructible with just the one required field, per the
    # "None => caller must supply from elsewhere" contract.
    p = ParsedName(display_title=None)
    assert p.confidence is False
    assert p.naive_title == ""