"""Tests fuer legal_metadata (rag_reingest_spec.md §3-Normalisierung)."""

import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent.parent))

import legal_metadata as L


def test_detect_citation_style():
    assert L.detect_citation_style("§ 38") == "paragraph"
    assert L.detect_citation_style("Artikel 13") == "article"
    assert L.detect_citation_style("Art. 13") == "article"


def test_normalize_article():
    assert L.normalize_article("§ 38") == "38"
    assert L.normalize_article("Artikel 13") == "13"
    assert L.normalize_article("Art. 13a") == "13a"
    assert L.normalize_article("[Artikel 17]") == "17"
    assert L.normalize_article("") == ""
    # Strikt: Datum/Seite/Titel sind KEINE Fundstelle -> leer (keine falsche Zitierung)
    assert L.normalize_article("4.5.2016 DE Amtsblatt der Europaeischen Union L 119/9") == ""
    assert L.normalize_article("Begriffsbestimmungen") == ""


def test_normalize_paragraph():
    assert L.normalize_paragraph("(1)") == "1"
    assert L.normalize_paragraph("Abs. 2") == "2"
    assert L.normalize_paragraph("") == ""


def test_extract_sub():
    assert L.extract_sub("... lit. c ...") == "lit. c"
    assert L.extract_sub("Satz 2 des Absatzes") == "Satz 2"
    assert L.extract_sub("kein Sub hier") == ""


def test_format_article_label_paragraph_style():
    # Klarname (regulation_short) wird NICHT mehr uppercased -> camelCase bleibt erhalten.
    assert L.format_article_label("ProdHaftG", "paragraph", "1", "", "") == "ProdHaftG § 1"
    assert L.format_article_label("BDSG", "paragraph", "38", "1", "") == "BDSG § 38 Abs. 1"
    assert L.format_article_label("BDSG", "paragraph", "38", "", "") == "BDSG § 38"


def test_format_article_label_article_style():
    assert L.format_article_label("DSGVO", "article", "13", "1", "lit. c") == "Art. 13 Abs. 1 lit. c DSGVO"
    assert L.format_article_label("DSGVO", "article", "30", "", "") == "Art. 30 DSGVO"
    # CH-Recht: Klarname + Art.
    assert L.format_article_label("RevDSG", "article", "12", "", "") == "Art. 12 RevDSG"


def test_compute_chunk_hash_stable_and_ws_insensitive():
    a = L.compute_chunk_hash("Hallo   Welt\n")
    b = L.compute_chunk_hash("Hallo Welt")
    assert a == b and len(a) == 64


def test_deterministic_point_id_stable():
    i1 = L.deterministic_point_id("BDSG", "38", "1", 0, "2026-06-19")
    i2 = L.deterministic_point_id("BDSG", "38", "1", 0, "2026-06-19")
    i3 = L.deterministic_point_id("BDSG", "38", "1", 1, "2026-06-19")
    assert i1 == i2 and i1 != i3 and len(i1) == 36  # UUID


def test_build_legal_fields_citation_style_override():
    # DSGVO = EU-VO -> citation_style 'article' pro Regulierung, NICHT '§' aus dem Section-String
    out = L.build_legal_fields(
        {"section": "§ 4", "section_title": "Begriffsbestimmungen", "paragraph": ""},
        "DSGVO", citation_style="article",
    )
    assert out["citation_style"] == "article"
    assert out["article"] == "4"
    assert out["article_label"] == "Art. 4 DSGVO"


def test_build_legal_fields_integration():
    out = L.build_legal_fields(
        {"section": "§ 38", "section_title": "Datenschutzbeauftragte", "paragraph": "(1)"},
        "bdsg",
        chunk_text="... in der Regel mindestens 20 Personen ...",
        display_name="BDSG",
    )
    assert out["citation_style"] == "paragraph"
    assert out["article"] == "38"
    assert out["paragraph"] == ""  # artikel-genau, kein geratener Absatz
    assert out["regulation_code"] == "BDSG"  # Feldwert bleibt GROSS
    assert out["article_label"] == "BDSG § 38"
    assert out["section_header"] == "Datenschutzbeauftragte"
    assert out["is_recital"] is False


def test_build_legal_fields_camelcase_display_name():
    # camelCase-Klarname bleibt im Label erhalten, Feld regulation_code bleibt GROSS.
    out = L.build_legal_fields(
        {"section": "§ 1", "section_title": "Haftung"},
        "PRODHAFTG",
        display_name="ProdHaftG",
    )
    assert out["regulation_code"] == "PRODHAFTG"
    assert out["article_label"] == "ProdHaftG § 1"


def test_build_legal_fields_ruling_uses_aktenzeichen_not_paragraph():
    # Urteil: Querverweis "§ 87 BetrVG" im Text darf KEIN Label "AZ § 87" erzeugen.
    out = L.build_legal_fields(
        {"section": "§ 87", "section_title": "Mitbestimmung"},
        "BAG_1_ABR_22_21",
        source_type="urteil",
        display_name="BAG, 1 ABR 22/21",
    )
    assert out["article"] == ""
    assert out["article_label"] == "BAG, 1 ABR 22/21"
    assert out["regulation_code"] == "BAG_1_ABR_22_21"