from pathlib import Path

import pytest

from docling.backend.md_backend import MarkdownDocumentBackend
from docling.datamodel.base_models import ConversionStatus, InputFormat
from docling.datamodel.document import (
    ConversionResult,
    DoclingDocument,
    InputDocument,
)
from docling.document_converter import DocumentConverter
from tests.verify_utils import CONFID_PREC, COORD_PREC

from .test_data_gen_flag import GEN_TEST_DATA
from .verify_utils import verify_document

pytestmark = pytest.mark.cross_platform


def test_convert_valid():
    fmt = InputFormat.MD
    cls = MarkdownDocumentBackend

    root_path = Path("tests") / "data"
    relevant_paths = sorted((root_path / "md").rglob("*.md"))
    assert len(relevant_paths) > 0

    yaml_filter = ["inline_and_formatting", "mixed_without_h1"]
    json_filter = ["escaped_characters", "signature_stamp_01"]

    for in_path in relevant_paths:
        md_gt_path = root_path / "groundtruth" / "docling_v2" / f"{in_path.name}.md"
        yaml_gt_path = root_path / "groundtruth" / "docling_v2" / f"{in_path.name}.yaml"
        json_gt_path = root_path / "groundtruth" / "docling_v2" / f"{in_path.name}.json"

        in_doc = InputDocument(
            path_or_stream=in_path,
            format=fmt,
            backend=cls,
        )
        backend = cls(
            in_doc=in_doc,
            path_or_stream=in_path,
        )
        assert backend.is_valid()

        act_doc = backend.convert()
        act_data = act_doc.export_to_markdown()

        if in_path.stem in json_filter:
            assert verify_document(act_doc, json_gt_path, GEN_TEST_DATA), (
                "export to json"
            )

        if GEN_TEST_DATA:
            with open(md_gt_path, mode="w", encoding="utf-8") as f:
                f.write(f"{act_data}\n")

            if in_path.stem in yaml_filter:
                act_doc.save_as_yaml(
                    yaml_gt_path,
                    coord_precision=COORD_PREC,
                    confid_precision=CONFID_PREC,
                )
        else:
            with open(md_gt_path, encoding="utf-8") as f:
                exp_data = f.read().rstrip()
            assert act_data == exp_data

            if in_path.stem in yaml_filter:
                exp_doc = DoclingDocument.load_from_yaml(yaml_gt_path)
                assert act_doc == exp_doc, f"export to yaml failed on {in_path}"


def get_md_paths():
    # Define the directory you want to search
    directory = Path("./tests/groundtruth/docling_v2")

    # List all MD files in the directory and its subdirectories
    md_files = sorted(directory.rglob("*.md"))
    return md_files


def get_converter():
    converter = DocumentConverter(allowed_formats=[InputFormat.MD])

    return converter


def test_e2e_md_conversions():
    md_paths = get_md_paths()
    converter = get_converter()

    for md_path in md_paths:
        # print(f"converting {md_path}")

        with open(md_path) as fr:
            true_md = fr.read()

        conv_result: ConversionResult = converter.convert(md_path)

        doc: DoclingDocument = conv_result.document

        pred_md: str = doc.export_to_markdown()
        assert true_md == pred_md

        conv_result_: ConversionResult = converter.convert_string(
            true_md, format=InputFormat.MD
        )

        doc_: DoclingDocument = conv_result_.document

        pred_md_: str = doc_.export_to_markdown()
        assert true_md == pred_md_


def test_convert_leading_dash_sequences():
    converter = get_converter()
    markdown = """## Research Article

Here is some content...

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

<!-- image -->
"""

    conv_result: ConversionResult = converter.convert_string(
        markdown, format=InputFormat.MD
    )

    pred_md = conv_result.document.export_to_markdown()

    assert conv_result.status == ConversionStatus.SUCCESS
    assert (
        "- This is an open access article under the terms of the Creative Commons Attribution License"
        in pred_md
    )


def test_convert_list_item_codespan_only():
    """
    Regression test:
    A list item that only contains an inline CodeSpan (no RawText) must not leave
    a pending ListItem payload behind, otherwise later RawText will attach it to a
    wrong parent and create a very deep tree (RecursionError in iterate/export).
    """
    converter = get_converter()
    markdown = """# Title

*   `raw_ops.Abort`
*   `raw_ops.Abs`
"""

    conv_result: ConversionResult = converter.convert_string(
        markdown, format=InputFormat.MD
    )
    assert conv_result.status == ConversionStatus.SUCCESS

    pred_md = conv_result.document.export_to_markdown()
    assert "- raw\\_ops.Abort" in pred_md
    assert "- raw\\_ops.Abs" in pred_md