from pathlib import Path

from markitect_tool.core import parse_markdown_file
from markitect_tool.explode import explode_markdown_file, implode_markdown_directory
from markitect_tool.ops import resolve_includes
from markitect_tool.processor import ProcessorContext, run_fenced_processors
from markitect_tool.reference import load_namespaces
from markitect_tool.literate import tangle_markdown


EXAMPLES = Path("examples/migration")


def test_migration_explode_example_roundtrips(tmp_path: Path):
    source = EXAMPLES / "legacy-explode-source.md"
    original = source.read_text(encoding="utf-8")

    explode_markdown_file(source, tmp_path / "exploded", variant="hierarchical")
    result = implode_markdown_directory(tmp_path / "exploded")

    assert result.markdown == original


def test_migration_reference_backed_transclusion_example():
    source = EXAMPLES / "legacy-transclusion-context.md"
    document = parse_markdown_file(source)
    context = ProcessorContext(
        root=EXAMPLES,
        current_path=source,
        namespaces=load_namespaces(document.frontmatter),
    )

    result = run_fenced_processors(source.read_text(encoding="utf-8"), context=context)

    assert result.valid
    assert "Payment is due within 30 days" in result.results[0].content


def test_migration_path_include_example():
    source = EXAMPLES / "legacy-path-include.md"

    result = resolve_includes(
        source.read_text(encoding="utf-8"),
        base_dir=EXAMPLES,
        current_path=source,
    )

    assert "## Warranty" in result.markdown
    assert "Warranty begins on the effective date" in result.markdown


def test_migration_literate_example_tangles():
    source = EXAMPLES / "legacy-literate.md"

    result = tangle_markdown(source.read_text(encoding="utf-8"), source_path=source)

    assert result.valid
    assert result.files[0].path == "src/app.py"
    assert "CONFIG" in result.files[0].content
    assert "<<config>>" not in result.files[0].content