"""合成离线样本检查。与同名 JSON 及文中列出的附件放在同一目录运行。"""
from pathlib import Path, PurePosixPath
import base64, hashlib, io, inspect, json, math, re, subprocess, sys, tempfile, wave, zipfile
from collections import Counter, defaultdict
from datetime import date, datetime
from decimal import Decimal
sys.dont_write_bytecode=True

def sha(b): return hashlib.sha256(b).hexdigest()
def rejected(fn):
    try: fn()
    except (ValueError,TypeError,KeyError,UnicodeError,OverflowError): return True
    return False

def git(root,*args,input=None,check=True):
    r=subprocess.run(['git','-c','core.autocrlf=false',*args],cwd=root,input=input,capture_output=True,check=check)
    return r

def verify(d,base):
    sx,sy=d['scale'];left,top,right,bottom=d['padding'];w,h=d['original_size'];cw,ch=d['canvas_size']
    assert w*sx+left+right==cw and h*sy+top+bottom==ch
    x1,y1,x2,y2=d['original_box'];forward=[x1*sx+left,y1*sy+top,x2*sx+left,y2*sy+top]
    assert forward==d['processed_box']
    def inverse(box):
        a,b,c,e=box
        if not (0<=a<c<=cw and 0<=b<e<=ch):raise ValueError('画布越界')
        if not (left<=a<c<=cw-right and top<=b<e<=ch-bottom):raise ValueError('包含补边')
        return [(a-left)/sx,(b-top)/sy,(c-left)/sx,(e-top)/sy]
    back=inverse(forward);assert back==d['original_box']
    assert rejected(lambda:inverse(d['padding_box'])) and rejected(lambda:inverse(d['out_of_bounds_box']))
    naive=[forward[0]/sx,forward[1]/sy,forward[2]/sx,forward[3]/sy];assert naive!=back
    return {'forward':forward,'inverse':back,'max_roundtrip_error':max(abs(a-b) for a,b in zip(back,d['original_box'])),'padding_and_bounds_rejected':True}

if __name__=='__main__':
    base=Path(__file__).resolve().parent
    data=json.loads((base/'a041.json').read_text('utf-8'))
    result=verify(data,base)
    print(json.dumps({'id':'A041','passed':True,'result':result},ensure_ascii=True))