"""Unit tests for draft overlap / Jaccard helpers (library scan uses vector store)."""

from app.services.content_similarity import find_draft_overlaps, jaccard_similarity


def test_jaccard_identical() -> None:
    assert jaccard_similarity("hello world", "hello world") == 1.0


def test_jaccard_disjoint() -> None:
    assert jaccard_similarity("aaa bbb", "ccc ddd") == 0.0


def test_jaccard_partial() -> None:
    sim = jaccard_similarity("slipped roof tiles on main hip", "main hip roof with slipped tiles")
    assert sim > 0.4


def test_find_draft_overlaps_line() -> None:
    text = "solid brick wall 275mm dpc visible slight crack nw corner"
    peers = {"E4": "solid brick construction 275mm dpc hairline crack north west corner elevation"}
    hits = find_draft_overlaps(text, "D", peers, line_threshold=0.25, block_threshold=0.55)
    assert len(hits) >= 1
    assert hits[0].other_section_code == "E4"
    assert hits[0].overlap_kind in ("line", "block")


def test_find_draft_overlaps_skips_same_section() -> None:
    text = "duplicate line about gutters blocked"
    peers = {"E3": "duplicate line about gutters blocked"}
    hits = find_draft_overlaps(text, "E3", peers)
    assert hits == []