# -*- 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))

seed('group-rates.csv','group,success,total\nsmall,9,10\nlarge,10,100\n')
rows=list(csv.DictReader((BASE/'group-rates.csv').open(encoding='utf-8')))
if NEG: rows.append({'group':'undefined','success':'0','total':'0'})
data=[]
for r in rows:
    a,b=int(r['success']),int(r['total'])
    if b<=0 or not 0<=a<=b: raise ValueError('分母为零或分子越界：'+r['group'])
    data.append((r['group'],a,b,a/b))
a=sum(r[1] for r in data);b=sum(r[2] for r in data);mean=sum(r[3] for r in data)/len(data)
table('rebuilt.csv',['group','success','total','rate'],data+[('ALL',a,b,a/b)])
page('comparison.html','两种比例',f'<p>分组简单平均 {mean:.2%}；合并总率 {a}/{b} = {a/b:.6%}</p><pre>'+html.escape((BASE/'rebuilt.csv').read_text(encoding='utf-8'))+'</pre>')
emit({'simple_mean':mean,'weighted':a/b,'success':a,'total':b})