# -*- coding: utf-8 -*-
"""原创离线合成样例；不连接模型、不读取账户。输出位于脚本旁。
已有输入保留，修改输入后可以重跑。失败边界由 --negative 单独演示。
"""
from pathlib import Path
import sys, json, csv, math, io, hashlib, html, base64, re
sys.stdout.reconfigure(encoding='utf-8')
sys.stderr.reconfigure(encoding='utf-8')
BASE = Path(__file__).resolve().parent
NEG = '--negative' in sys.argv
def write(name, value):
    p=BASE/name; p.parent.mkdir(parents=True,exist_ok=True)
    if isinstance(value,bytes): p.write_bytes(value)
    else: p.write_text(value,encoding='utf-8',newline='')
def seed(name,value):
    if not (BASE/name).exists(): write(name,value)
def jwrite(name,value): write(name,json.dumps(value,ensure_ascii=False,indent=2))
def jseed(name,value):
    if not (BASE/name).exists(): jwrite(name,value)
def load(name): return json.loads((BASE/name).read_text(encoding='utf-8'))
def table(name,heads,rows):
    f=io.StringIO(newline='');w=csv.writer(f);w.writerow(heads);w.writerows(rows);write(name,f.getvalue())
def page(name,title,body):
    write(name,'<!doctype html><html lang="zh-CN"><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>'+html.escape(title)+'</title><style>body{max-width:1000px;margin:2rem auto;padding:0 1rem;font:17px/1.7 system-ui}table{border-collapse:collapse}td,th{border:1px solid #aaa;padding:.5rem}pre{white-space:pre-wrap;overflow-wrap:anywhere}img,svg{max-width:100%;height:auto}a{color:#125caa}</style><h1>'+html.escape(title)+'</h1>'+body+'</html>')
def emit(data): print(json.dumps(data,ensure_ascii=False))

import fitz
if not (BASE/'report.pdf').exists():
    doc=fitz.open()
    for i in range(5):p=doc.new_page();p.insert_text((60,80),f'Synthetic report physical page {i+1}');p.insert_text((60,130),'Cover' if i==0 else f'Section content {i}')
    doc.save(BASE/'report.pdf');doc.close()
seed('chapter-map.csv','level,title,physical_page\n1,Part One,2\n2,Detail One,3\n1,Part Two,4\n2,Detail Two,5\n')
toc=[[int(r['level']),r['title'],int(r['physical_page'])] for r in csv.DictReader((BASE/'chapter-map.csv').open())]
if NEG: toc[1][0]=4
doc=fitz.open(BASE/'report.pdf');previous=0
for level,title,p in toc:
    if not 1<=p<=len(doc) or level<1 or level>previous+1:raise ValueError('书签页越界或层级跳号')
    previous=level
doc.set_toc(toc);doc.save(BASE/'report-with-bookmarks.pdf');doc.close();read=fitz.open(BASE/'report-with-bookmarks.pdf');actual=read.get_toc();jwrite('bookmark-readback.json',actual);emit({'toc':actual,'pages':len(read)})