# -*- coding: utf-8 -*-
"""扫描 PDF 中内容过少（大片空白）的页面。"""
import io
import os
import sys

import fitz

sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding="utf-8")

PDF = os.path.join(os.path.dirname(os.path.abspath(__file__)),
                   "_tmp_inspect", "current.pdf")
d = fitz.open(PDF)
bad = []
for i, pg in enumerate(d, 1):
    txt = pg.get_text().strip()
    # 页码本身算 2~4 个字符，先去掉
    nchar = len(txt.replace("\n", ""))
    nimg = len(pg.get_images(full=True))
    if nimg == 0 and nchar < 90:
        bad.append((i, nchar, txt.replace("\n", " / ")[:70]))
print(f"共 {d.page_count} 页；内容过少的页 {len(bad)} 页")
for i, n, t in bad:
    print(f"  p{i:>3}  {n:>3} 字  「{t}」")
d.close()