from __future__ import annotations

from pathlib import Path

import pytest

from pdftomd.models import DocumentIdentity
from pdftomd.paths import (
    OutputBundlePaths,
    document_identity_from_pdf,
    make_anchor,
    normalize_pdf_path,
)


def test_normalize_pdf_path_accepts_korean_and_spaced_paths(tmp_path: Path) -> None:
    pdf = tmp_path / "한글 경로" / "My Report 2026.pdf"
    pdf.parent.mkdir()
    pdf.write_bytes(b"%PDF-1.7\n")

    normalized = normalize_pdf_path(pdf)

    assert normalized.is_absolute()
    assert normalized.name == "My Report 2026.pdf"


def test_normalize_pdf_path_rejects_non_pdf_files(tmp_path: Path) -> None:
    text_file = tmp_path / "document.txt"
    text_file.write_text("not a pdf", encoding="utf-8")

    with pytest.raises(ValueError, match="PDF"):
        normalize_pdf_path(text_file)


def test_document_identity_from_pdf_uses_stable_slug(tmp_path: Path) -> None:
    pdf = tmp_path / "한글 보고서.pdf"
    pdf.write_bytes(b"%PDF-1.7\n")

    first = document_identity_from_pdf(pdf)
    second = document_identity_from_pdf(pdf)

    assert first.filename == "한글 보고서.pdf"
    assert first.slug == second.slug
    assert first.slug.startswith("document-")
    assert first.source_path == str(normalize_pdf_path(pdf))


def test_output_bundle_paths_keep_document_and_runtime_artifacts_separate(tmp_path: Path) -> None:
    document = DocumentIdentity.from_path("Example Paper.pdf")
    bundle = OutputBundlePaths.from_document(tmp_path, document)

    assert bundle.document_dir == tmp_path / "example-paper"
    assert bundle.images_dir == tmp_path / "example-paper" / "images"
    assert bundle.chunk_path(1) == tmp_path / "example-paper" / "example-paper_001.md"
    assert bundle.figure_asset_path("1") == tmp_path / "example-paper" / "images" / "example-paper_fig-1.png"
    assert bundle.runtime_dir == tmp_path / ".pdftomd-runtime" / "example-paper"
    assert bundle.log_path.name == "conversion.log"
    assert bundle.resume_state_path.name == "resume-state.json"
    assert bundle.runtime_dir not in bundle.document_dir.parents


def test_make_anchor_is_deterministic_and_validates_kind() -> None:
    assert make_anchor("Figure", "2 A") == "figure-2-a"
    assert make_anchor("Equation", "식 3") == "equation-3"

    with pytest.raises(ValueError, match="kind"):
        make_anchor("", "1")