"""Tests for the ingestion pipeline."""

from atocore.ingestion.parser import parse_markdown
from atocore.models.database import get_connection, init_db
from atocore.ingestion.pipeline import ingest_file, ingest_folder


def test_parse_markdown(sample_markdown):
    """Test markdown parsing with frontmatter."""
    parsed = parse_markdown(sample_markdown)
    assert parsed.title == "AtoCore Architecture"
    assert "atocore" in parsed.tags
    assert "architecture" in parsed.tags
    assert len(parsed.body) > 0
    assert len(parsed.headings) > 0


def test_parse_extracts_headings(sample_markdown):
    """Test that headings are extracted correctly."""
    parsed = parse_markdown(sample_markdown)
    heading_texts = [h[1] for h in parsed.headings]
    assert "AtoCore Architecture" in heading_texts
    assert "Overview" in heading_texts


def test_ingest_file(tmp_data_dir, sample_markdown):
    """Test ingesting a single file."""
    init_db()
    result = ingest_file(sample_markdown)
    assert result["status"] == "ingested"
    assert result["chunks"] > 0

    # Verify the file was stored in DB
    with get_connection() as conn:
        doc = conn.execute(
            "SELECT COUNT(*) as c FROM source_documents WHERE file_path = ?",
            (str(sample_markdown.resolve()),),
        ).fetchone()
        assert doc["c"] == 1

        chunks = conn.execute(
            "SELECT COUNT(*) as c FROM source_chunks sc "
            "JOIN source_documents sd ON sc.document_id = sd.id "
            "WHERE sd.file_path = ?",
            (str(sample_markdown.resolve()),),
        ).fetchone()
        assert chunks["c"] > 0


def test_ingest_skips_unchanged(tmp_data_dir, sample_markdown):
    """Test that re-ingesting unchanged file is skipped."""
    init_db()
    ingest_file(sample_markdown)
    result = ingest_file(sample_markdown)
    assert result["status"] == "skipped"


def test_ingest_updates_changed(tmp_data_dir, sample_markdown):
    """Test that changed files are re-ingested."""
    init_db()
    ingest_file(sample_markdown)

    # Modify the file
    sample_markdown.write_text(
        sample_markdown.read_text(encoding="utf-8") + "\n\n## New Section\n\nNew content added.",
        encoding="utf-8",
    )
    result = ingest_file(sample_markdown)
    assert result["status"] == "ingested"


def test_parse_markdown_uses_supplied_text(sample_markdown):
    """Parsing should be able to reuse pre-read content from ingestion."""
    latin_text = """---\ntags: parser\n---\n# Parser Title\n\nBody text."""
    parsed = parse_markdown(sample_markdown, text=latin_text)
    assert parsed.title == "Parser Title"
    assert "parser" in parsed.tags


def test_reingest_empty_replaces_stale_chunks(tmp_data_dir, sample_markdown, monkeypatch):
    """Re-ingesting a file with no chunks should clear stale DB/vector state."""
    init_db()

    class FakeVectorStore:
        def __init__(self):
            self.deleted_ids = []

        def add(self, ids, documents, metadatas):
            return None

        def delete(self, ids):
            self.deleted_ids.extend(ids)

    fake_store = FakeVectorStore()
    monkeypatch.setattr("atocore.ingestion.pipeline.get_vector_store", lambda: fake_store)

    first = ingest_file(sample_markdown)
    assert first["status"] == "ingested"

    sample_markdown.write_text("# Changed\n\nThis update should now produce no chunks after monkeypatching.", encoding="utf-8")
    monkeypatch.setattr("atocore.ingestion.pipeline.chunk_markdown", lambda *args, **kwargs: [])
    second = ingest_file(sample_markdown)
    assert second["status"] == "empty"

    with get_connection() as conn:
        chunk_count = conn.execute("SELECT COUNT(*) AS c FROM source_chunks").fetchone()
        assert chunk_count["c"] == 0

    assert fake_store.deleted_ids


def test_ingest_folder_includes_markdown_extension(tmp_data_dir, sample_folder, monkeypatch):
    """Folder ingestion should include both .md and .markdown files."""
    init_db()
    markdown_file = sample_folder / "third_note.markdown"
    markdown_file.write_text("# Third Note\n\nThis file should be discovered during folder ingestion.", encoding="utf-8")

    class FakeVectorStore:
        def add(self, ids, documents, metadatas):
            return None

        def delete(self, ids):
            return None

        @property
        def count(self):
            return 0

    monkeypatch.setattr("atocore.ingestion.pipeline.get_vector_store", lambda: FakeVectorStore())
    results = ingest_folder(sample_folder)
    files = {result["file"] for result in results if "file" in result}
    assert str(markdown_file.resolve()) in files


def test_purge_deleted_files_does_not_match_sibling_prefix(tmp_data_dir, sample_folder, monkeypatch):
    """Purging one folder should not delete entries from a sibling folder with the same prefix."""
    init_db()

    class FakeVectorStore:
        def add(self, ids, documents, metadatas):
            return None

        def delete(self, ids):
            return None

        @property
        def count(self):
            return 0

    monkeypatch.setattr("atocore.ingestion.pipeline.get_vector_store", lambda: FakeVectorStore())

    kept_folder = tmp_data_dir / "notes"
    kept_folder.mkdir()
    kept_file = kept_folder / "keep.md"
    kept_file.write_text("# Keep\n\nThis document should survive purge.", encoding="utf-8")
    ingest_file(kept_file)

    purge_folder = tmp_data_dir / "notes-project"
    purge_folder.mkdir()
    purge_file = purge_folder / "gone.md"
    purge_file.write_text("# Gone\n\nThis document will be purged.", encoding="utf-8")
    ingest_file(purge_file)
    purge_file.unlink()

    ingest_folder(purge_folder, purge_deleted=True)

    with get_connection() as conn:
        rows = conn.execute("SELECT file_path FROM source_documents").fetchall()
    remaining_paths = {row["file_path"] for row in rows}
    assert str(kept_file.resolve()) in remaining_paths