import pytest
from pathlib import Path

from genesis.data_models import StructuredSource
from genesis.parsers.source_aggregator import SourceParser

from tests.docx_helpers import make_rule_doc, new_document, save_document
from tests.excel_helpers import new_workbook, save_workbook


def _xlsx(tmp_path, name: str = "source.xlsx") -> str:
    wb = new_workbook({"機能一覧": [["機能ID", "機能名"], ["A001", "社員登録"]]})
    path = tmp_path / name
    wb.save(path)
    return str(path)


def test_parse_full_assembly(tmp_path):
    xlsx = _xlsx(tmp_path)
    template = save_document(tmp_path, new_document())
    rule = make_rule_doc(tmp_path, [("H1", "1. 機能一覧の書き方")])
    instr = make_rule_doc(tmp_path, [("H1", "2. 機能一覧の作成手順")])

    result = SourceParser().parse(
        requirement_paths=[xlsx],
        template_path=template,
        write_instruction_paths=[instr],
        rule_paths=[rule],
    )

    assert isinstance(result, StructuredSource)
    assert len(result.tables) == 1
    assert result.template is not None
    assert result.template.file_name == "source.docx"
    assert len(result.rule_docs) == 2
    assert all(r.category == "write" for r in result.rule_docs)
    assert result.image_analyses == []
    assert result.existing_system is None


def test_parse_without_template_and_rules(tmp_path):
    xlsx = _xlsx(tmp_path)

    result = SourceParser().parse(requirement_paths=[xlsx])

    assert len(result.tables) == 1
    assert result.template is None
    assert result.rule_docs == []


def test_parse_missing_requirement_file(tmp_path):
    with pytest.raises(FileNotFoundError):
        SourceParser().parse(requirement_paths=[tmp_path / "missing.xlsx"])


def test_parse_missing_template_file(tmp_path):
    xlsx = _xlsx(tmp_path)
    with pytest.raises(FileNotFoundError):
        SourceParser().parse(requirement_paths=[xlsx], template_path=tmp_path / "missing.docx")


def test_parse_unknown_extension_in_requirements(tmp_path):
    bad = tmp_path / "note.txt"
    bad.write_text("hello", encoding="utf-8")
    with pytest.raises(ValueError, match="不支持的文件类型"):
        SourceParser().parse(requirement_paths=[bad])


def test_parse_unknown_extension_in_rules(tmp_path):
    bad = tmp_path / "note.txt"
    bad.write_text("hello", encoding="utf-8")
    with pytest.raises(ValueError, match="不支持的文件类型"):
        SourceParser().parse(rule_paths=[bad])


def test_parse_unknown_extension_in_template(tmp_path):
    bad = tmp_path / "note.txt"
    bad.write_text("hello", encoding="utf-8")
    with pytest.raises(ValueError, match="不支持的文件类型"):
        SourceParser().parse(template_path=bad)


def test_parse_missing_rule_file(tmp_path):
    with pytest.raises(FileNotFoundError):
        SourceParser().parse(rule_paths=[tmp_path / "missing.docx"])


def test_parse_extensionless_requirement(tmp_path):
    bad = tmp_path / "note"
    bad.write_text("hello", encoding="utf-8")
    with pytest.raises(ValueError, match="无扩展名"):
        SourceParser().parse(requirement_paths=[bad])


def test_parse_extensionless_rule(tmp_path):
    bad = tmp_path / "note"
    bad.write_text("hello", encoding="utf-8")
    with pytest.raises(ValueError, match="无扩展名"):
        SourceParser().parse(rule_paths=[bad])


# ---------- T7: DRY _validate_path helper（I8） ----------

def test_validate_path_rejects_bad_extension(tmp_path):
    from genesis.parsers.source_aggregator import _validate_path

    bad = tmp_path / "note.txt"
    bad.write_text("x", encoding="utf-8")
    with pytest.raises(ValueError, match="不支持的文件类型"):
        _validate_path(bad, (".xlsx",))


def test_validate_path_rejects_missing_file(tmp_path):
    from genesis.parsers.source_aggregator import _validate_path

    with pytest.raises(FileNotFoundError):
        _validate_path(tmp_path / "missing.xlsx", (".xlsx",))


def test_validate_path_returns_resolved_path(tmp_path):
    from genesis.parsers.source_aggregator import _validate_path

    good = tmp_path / "ok.xlsx"
    good.write_bytes(b"x")
    result = _validate_path(str(good), (".xlsx",))
    assert isinstance(result, Path)
    assert result.suffix.lower() == ".xlsx"