"""产品推介材料 PDF 转换适配器。"""

import subprocess
from pathlib import Path


class PromotionPdfAdapter:
    """首版只在配置启用且本机存在转换器时转换，不伪造 PDF 成功状态。"""

    def __init__(self, *, enabled: bool = False, converter_path: str = "") -> None:
        self.enabled = enabled
        self.converter_path = converter_path

    def convert(self, pptx_path: str | Path, output_path: str | Path) -> str | None:
        if not self.enabled or not self.converter_path:
            return None
        source = Path(pptx_path).resolve()
        target = Path(output_path).resolve()
        if not source.is_file():
            raise RuntimeError("PPTX 文件不存在，无法转换 PDF")
        target.parent.mkdir(parents=True, exist_ok=True)
        completed = subprocess.run(
            [
                self.converter_path,
                "--headless",
                "--convert-to",
                "pdf",
                "--outdir",
                str(target.parent),
                str(source),
            ],
            capture_output=True,
            text=True,
            check=False,
        )
        generated = target.parent / f"{source.stem}.pdf"
        if completed.returncode != 0 or not generated.is_file():
            raise RuntimeError("PPTX 转 PDF 失败")
        if generated != target:
            generated.replace(target)
        return str(target)