from companion.rag.chunker import sliding_window_chunks


def test_sliding_window_basic():
    text = "word " * 100
    chunks = sliding_window_chunks(text, chunk_size=20, chunk_overlap=5)
    assert len(chunks) > 1
    assert len(chunks[0].split()) == 20
    # overlap check: last 5 words of chunk 0 should appear in chunk 1
    last_five = chunks[0].split()[-5:]
    first_chunk1 = chunks[1].split()[:5]
    assert last_five == first_chunk1
from companion.rag.chunker import section_based_chunks, chunk_file, ChunkingRule
import tempfile
from pathlib import Path


def test_section_based_chunks_splits_on_tags():
    text = "#DayInShort: good day\n#mentalhealth: stressed\n#work: busy"
    chunks = section_based_chunks(text, ["#DayInShort", "#mentalhealth", "#work"], chunk_size=10, chunk_overlap=2)
    assert len(chunks) == 3
    assert chunks[0][1] == "#DayInShort"
    assert chunks[1][1] == "#mentalhealth"
    assert chunks[2][1] == "#work"


def test_chunk_file_extracts_metadata():
    with tempfile.TemporaryDirectory() as tmp:
        vault = Path(tmp)
        journal = vault / "Journal" / "2026" / "04" / "2026-04-12.md"
        journal.parent.mkdir(parents=True)
        journal.write_text("#DayInShort: good day\n#Relations: [[Person/Vinay]] visited.", encoding="utf-8")
        rules = {
            "default": ChunkingRule(strategy="sliding_window", chunk_size=500, chunk_overlap=100),
            "Journal/**": ChunkingRule(strategy="section", chunk_size=300, chunk_overlap=50, section_tags=["#DayInShort", "#Relations"]),
        }
        chunks = chunk_file(journal, vault, rules, modified_at=1234567890.0)
        assert len(chunks) == 2
        assert chunks[0].source_directory == "Journal"
        assert chunks[0].date == "2026-04-12"
        assert "Person/Vinay" in (chunks[1].tags or [])