"""R636：完整持有区间监测，未知行业保留，终点合规不掩盖中途超限。"""
from math import isfinite,isclose

SHARES={'A':4,'B':4,'C':1};SECTORS={'A':'Tech','B':'Health','C':'Utilities'}
PRICES={'A':[100,140,150,110,100],'B':[100]*5,'C':[100]*5}


def monitor(shares,cash,prices,sectors):
    if not isfinite(cash) or cash<0:raise ValueError('invalid cash')
    rows=[]
    for t in range(5):
        if any(prices[s][t] is None or not isfinite(prices[s][t]) or prices[s][t]<=0 for s in shares):raise ValueError('missing or invalid price')
        values={s:shares[s]*prices[s][t] for s in shares}
        if any(not isfinite(v) or v<0 for v in values.values()):raise ValueError('invalid quote')
        nav=cash+sum(values.values())
        if not isfinite(nav) or nav<=0:raise ValueError('invalid NAV')
        w={s:value/nav for s,value in values.items()};sector={}
        for s,weight in w.items():
            group=sectors.get(s) or 'Unknown';sector[group]=sector.get(group,0)+weight
        assert isclose(sum(w.values())+cash/nav,1,rel_tol=0,abs_tol=1e-12)
        rows.append({'session':t,'NAV':nav,'weights':w,'sectors':sector,
                     'tech_breach':sector.get('Tech',0)>.45,'single_breach':max(w.values(),default=0)>.49,
                     'classification_complete':'Unknown' not in sector,
                     'tech_upper_bound':sector.get('Tech',0)+sector.get('Unknown',0),
                     'tech_conclusion':'confirmed_breach' if sector.get('Tech',0)>.45 else 'classification_incomplete' if sector.get('Unknown',0)>0 else 'within_declared_cap'})
    return rows


def episodes(rows,field):
    out=[];current=[]
    for row in rows:
        if row[field]:current.append(row['session'])
        elif current:out.append(current);current=[]
    if current:out.append(current)
    return out


rows=monitor(SHARES,100,PRICES,SECTORS)
sector_days=[r['session'] for r in rows if r['tech_breach']]
single_days=[r['session'] for r in rows if r['single_breach']]
assert sector_days==[1,2] and single_days==[2]
assert episodes(rows,'tech_breach')==[[1,2]] and episodes(rows,'single_breach')==[[2]]
assert not rows[0]['tech_breach'] and not rows[-1]['tech_breach']
unknown=monitor(SHARES,100,PRICES,{'A':'Tech','B':'Health'})
assert unknown[0]['sectors']['Unknown']==.1 and not unknown[0]['classification_complete']
assert unknown[0]['tech_conclusion']=='classification_incomplete' and unknown[0]['tech_upper_bound']==.5
try:monitor({'A':0,'B':0,'C':0},0,PRICES,SECTORS)
except ValueError:pass
else:raise AssertionError('zero base accepted')
assert SHARES=={'A':4,'B':4,'C':1}
assert all(not row['single_breach'] for row in monitor({},1000,{},{}))
missing={s:list(values) for s,values in PRICES.items()};missing['B'][2]=None
try:monitor(SHARES,100,missing,SECTORS)
except ValueError:pass
else:raise AssertionError('missing price silently passed')
print('Tech_weights='+str([round(r['sectors']['Tech'],6) for r in rows]))
print('Tech_first=1 breach_sessions=[1,2] longest=2 single_first=2 breach_sessions=[2] final_compliant=True')
print('unknown_weight_initial=0.1 classification_status=incomplete policy=monitor_only orders=0 zero_NAV=rejected')