"""Behavioral normalization for browser observations; never inspect solutions."""
from decimal import Decimal,InvalidOperation
import re
ASCII_SPACE=re.compile(r'[ \t\r\n\f]+')
BOOLEAN={'disabled','checked','selected','required','multiple','readonly','autofocus','open','reversed'}
CASE_INSENSITIVE={'method','dir','type','contenteditable','lang','enctype','formmethod'}
FLOATING={'max','min'}
INTEGER={'rows','cols','tabindex','colspan','rowspan','width','height'}

def matches(check,observed,target):
    kind=check['kind']
    if kind=='html_text':
        if not isinstance(observed,dict) or 'text' not in observed:return False
        text=observed['text']
        if observed.get('white_space') in ('pre','pre-wrap','break-spaces'):
            return text.replace('\r\n','\n')==target.replace('\r\n','\n')
        if observed.get('white_space')=='pre-line':
            collapse=lambda s:'\n'.join(re.sub(r'[ \t\f]+',' ',line).strip() for line in s.replace('\r\n','\n').split('\n'))
            return collapse(text)==collapse(target)
        return ASCII_SPACE.sub(' ',text).strip()==ASCII_SPACE.sub(' ',target).strip()
    if kind!='attribute':return observed==target
    if observed is not None and not isinstance(observed,str):return False
    name=check['name'].lower()
    if name=='class':return set((observed or '').split())==set((target or '').split())
    if name in BOOLEAN:return (observed is not None)==(target is not None)
    if name=='hidden':
        def state(v):return 'absent' if v is None else 'until-found' if v.lower()=='until-found' else 'hidden'
        return state(observed)==state(target)
    if observed is None or target is None:return observed==target
    if name in CASE_INSENSITIVE:return observed.lower()==target.lower()
    if name in INTEGER:
        a=re.match(r'^[ \t\r\n\f]*([+-]?[0-9]+)',observed)
        b=re.match(r'^[ \t\r\n\f]*([+-]?[0-9]+)',target)
        return bool(a and b and int(a.group(1))==int(b.group(1)))
    if name in FLOATING or (name=='value' and re.search(r'\b(?:progress|meter)\b',check.get('selector',''))):
        try:
            a,b=Decimal(observed),Decimal(target)
            if a.is_finite() and b.is_finite():return a==b
        except (InvalidOperation,TypeError,ValueError):pass
    return observed==target