import zipfile
import re

ppt = r"D:\F\yc\课程上架\福田商圈夜校\课程视频\钢琴演奏入门第一课.pptx"

with zipfile.ZipFile(ppt, "r") as z:
    names = z.namelist()
    slide_files = [f for f in names if f.startswith("ppt/slides/slide") and f.endswith(".xml")]
    print(f"Total files in zip: {len(names)}")
    print(f"Slide files found: {len(slide_files)}")
    print(f"First 5 slide files: {slide_files[:5]}")

    # Test presentation.xml
    try:
        pres_xml = z.read("ppt/presentation.xml").decode("utf-8", errors="replace")
        sld_ids = re.findall(r'<p:sldId\b[^>]*r:id="([^"]+)"', pres_xml)
        print(f"\nsldIdList rIds: {sld_ids[:5]}")
    except Exception as e:
        print(f"\npresentation.xml error: {e}")

    # Test rels
    try:
        rels_xml = z.read("ppt/_rels/presentation.xml.rels").decode("utf-8", errors="replace")
        rid_to_target = dict(re.findall(r'Id="([^"]+)"[^>]*Target="([^"]+)"', rels_xml))
        print(f"Rels entries: {len(rid_to_target)}")
        # Show a sample
        for k, v in list(rid_to_target.items())[:3]:
            print(f"  {k} -> {v}")
    except Exception as e:
        print(f"\nrels error: {e}")