import os

import comtypes.client


def ppt_to_pdf_single(ppt_path, pdf_path=None):
    """
    单个 PPT 转 PDF
    :param ppt_path: PPT 文件路径
    :param pdf_path: PDF 输出路径 (可选，默认同名)
    """
    ppt_path = os.path.abspath(ppt_path)  # COM 接口必须使用绝对路径

    if pdf_path is None:
        pdf_path = os.path.splitext(ppt_path)[0] + ".pdf"
    pdf_path = os.path.abspath(pdf_path)

    if not os.path.exists(ppt_path):
        print(f"文件不存在: {ppt_path}")
        return False

    powerpoint = None
    try:
        # 启动 PowerPoint 应用
        powerpoint = comtypes.client.CreateObject("PowerPoint.Application")
        powerpoint.Visible = 1  # 设为可见，否则某些版本会报错

        # 打开演示文稿
        deck = powerpoint.Presentations.Open(ppt_path)

        # 保存为 PDF (文件格式代码 32 代表 PDF)
        deck.SaveAs(pdf_path, 32)

        deck.Close()
        print(f"转换成功: {pdf_path}")
        return True
    except Exception as e:
        print(f"转换失败: {str(e)}")
        return False
    finally:
        if powerpoint:
            powerpoint.Quit()