from __future__ import annotations

from zipfile import ZipFile

from app.services.knowledge_document_extractors import _extract_document_text_from_path


def test_extract_docx_document_text_preserves_tables_as_markdown(tmp_path) -> None:
    file_path = tmp_path / "financial-basic.docx"
    _write_minimal_docx_with_table(
        file_path,
        paragraphs=[
            "远光软件股份有限公司",
            "财务基础知识手册",
            "二、常用会计科目",
        ],
        table=[
            ["科目类别", "科目名称", "说明"],
            ["资产类", "库存现金", "公司持有的现金"],
            ["负债类", "应付账款", "因购买商品或接受劳务应付的款项"],
            ["损益类", "销售费用", "为销售产品发生的费用"],
        ],
    )

    text = _extract_document_text_from_path(
        file_path=file_path,
        original_name="远光软件财务基础知识手册.docx",
        mime_type="application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    )

    assert "二、常用会计科目" in text
    assert "| 科目类别 | 科目名称 | 说明 |" in text
    assert "| 资产类 | 库存现金 | 公司持有的现金 |" in text
    assert "| 负债类 | 应付账款 | 因购买商品或接受劳务应付的款项 |" in text
    assert "| 损益类 | 销售费用 | 为销售产品发生的费用 |" in text
    assert "表格第 2 行：科目类别=资产类；科目名称=库存现金；说明=公司持有的现金" in text
    assert "科目类别\n科目名称\n说明" not in text


def test_extract_xlsx_document_text_builds_markdown_with_row_clues(tmp_path) -> None:
    file_path = tmp_path / "company-expense-rules.xlsx"
    _write_minimal_xlsx(
        file_path,
        sheet_name="报销标准",
        rows=[
            ["费用类型", "标准", "说明"],
            ["住宿费", "500", "超标准需事前审批"],
            ["交通费", "据实", "保留发票"],
        ],
    )

    text = _extract_document_text_from_path(
        file_path=file_path,
        original_name="公司支出管理办法.xlsx",
        mime_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    )

    assert "# Excel 工作簿：公司支出管理办法.xlsx" in text
    assert "## 工作表 1：报销标准" in text
    assert "| 费用类型 | 标准 | 说明 |" in text
    assert "费用类型=住宿费；标准=500；说明=超标准需事前审批" in text
    assert "费用类型=交通费；标准=据实；说明=保留发票" in text


def test_extract_pptx_document_text_builds_markdown_slides(tmp_path) -> None:
    file_path = tmp_path / "training.pptx"
    slide_xml = """<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<p:sld xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main"
       xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main">
  <p:cSld>
    <p:spTree>
      <p:sp><p:txBody><a:p><a:r><a:t>差旅报销培训</a:t></a:r></a:p></p:txBody></p:sp>
      <p:sp><p:txBody><a:p><a:r><a:t>发票、审批、预算三项要素必须齐全</a:t></a:r></a:p></p:txBody></p:sp>
    </p:spTree>
  </p:cSld>
</p:sld>
"""
    with ZipFile(file_path, "w") as archive:
        archive.writestr("ppt/slides/slide1.xml", slide_xml)

    text = _extract_document_text_from_path(
        file_path=file_path,
        original_name="报销培训.pptx",
        mime_type="application/vnd.openxmlformats-officedocument.presentationml.presentation",
    )

    assert "# PowerPoint 演示文稿：报销培训.pptx" in text
    assert "## 幻灯片 1" in text
    assert "- 差旅报销培训" in text
    assert "- 发票、审批、预算三项要素必须齐全" in text


def _write_minimal_docx_with_table(
    file_path,
    *,
    paragraphs: list[str],
    table: list[list[str]],
) -> None:
    paragraph_xml = "\n".join(f"<w:p>{_docx_text_run(text)}</w:p>" for text in paragraphs)
    table_xml = (
        "<w:tbl>"
        + "".join(
            "<w:tr>"
            + "".join(f"<w:tc><w:p>{_docx_text_run(cell)}</w:p></w:tc>" for cell in row)
            + "</w:tr>"
            for row in table
        )
        + "</w:tbl>"
    )
    document_xml = f"""<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">
  <w:body>
    {paragraph_xml}
    {table_xml}
  </w:body>
</w:document>
"""
    with ZipFile(file_path, "w") as archive:
        archive.writestr("word/document.xml", document_xml)


def _docx_text_run(text: str) -> str:
    return f"<w:r><w:t>{text}</w:t></w:r>"


def _write_minimal_xlsx(file_path, *, sheet_name: str, rows: list[list[str]]) -> None:
    workbook_xml = f"""<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main"
          xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">
  <sheets>
    <sheet name="{sheet_name}" sheetId="1" r:id="rId1"/>
  </sheets>
</workbook>
"""
    rels_xml = """<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1"
                Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet"
                Target="worksheets/sheet1.xml"/>
</Relationships>
"""
    row_xml = "\n".join(
        f'<row r="{row_index}">'
        + "".join(
            f'<c r="{chr(65 + column_index)}{row_index}" t="inlineStr"><is><t>{cell}</t></is></c>'
            for column_index, cell in enumerate(row)
        )
        + "</row>"
        for row_index, row in enumerate(rows, start=1)
    )
    sheet_xml = f"""<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
  <sheetData>
    {row_xml}
  </sheetData>
</worksheet>
"""
    with ZipFile(file_path, "w") as archive:
        archive.writestr("xl/workbook.xml", workbook_xml)
        archive.writestr("xl/_rels/workbook.xml.rels", rels_xml)
        archive.writestr("xl/worksheets/sheet1.xml", sheet_xml)
