import json,sys,os,copy;from datetime import datetime

def loadJ(p):
    f=open(p,'r');d=json.load(f);f.close();return d

def saveJ(p,d):
    f=open(p,'w');json.dump(d,f,indent=2);f.close()

def proc(accs,txns):
    ok=[];bad=[]
    for t in txns:
        tp=t['type'];aid=t['account_id'];amt=t['amount'];tid=t['id']
        # find account
        a=None
        for x in accs:
            if x['account_id']==aid:a=x
        if a==None:
            t['reason']='account not found';bad.append(t);continue
        if a['status']!='active':
            t['reason']='account not active';bad.append(t);continue
        if amt<=0 and tp!='withdrawal':
            if tp=='deposit':t['reason']='invalid amount';bad.append(t);continue
            if tp=='transfer':t['reason']='invalid amount';bad.append(t);continue
        if amt<=0 and tp=='withdrawal':
            t['reason']='invalid amount';bad.append(t);continue
        if tp=='deposit':
            a['balance']=a['balance']+amt;t['status']='accepted';ok.append(t)
        elif tp=='withdrawal':
            if a['balance']>=amt:
                a['balance']=a['balance']-amt;t['status']='accepted';ok.append(t)
            else:
                t['reason']='insufficient funds';t['status']='rejected';bad.append(t)
        elif tp=='transfer':
            ta=None
            for x in accs:
                if x['account_id']==t.get('to_account_id',''):ta=x
            if ta==None:t['reason']='target account not found';bad.append(t);continue
            if ta['status']!='active':t['reason']='target account not active';bad.append(t);continue
            if a['balance']>=amt:
                a['balance']=a['balance']-amt;ta['balance']=ta['balance']+amt
                t['status']='accepted';ok.append(t)
            else:
                t['reason']='insufficient funds';t['status']='rejected';bad.append(t)
        else:
            t['reason']='unknown type';bad.append(t)
    return accs,ok,bad

def main():
    D=loadJ('accounts.json');T=loadJ('transactions.json')
    accs=D['accounts'];txns=T['transactions']
    accs,ok,bad=proc(accs,txns)
    # print results
    print("=== UPDATED ACCOUNTS ===")
    for a in accs:print("  "+a['account_id']+" "+a['holder']+": "+str(a['balance'])+" "+a['currency']+" ("+a['status']+")")
    print("\n=== ACCEPTED ("+str(len(ok))+") ===")
    for t in ok:print("  "+t['id']+" "+t['type']+" "+str(t['amount'])+" -> "+t.get('description',''))
    print("\n=== REJECTED ("+str(len(bad))+") ===")
    for t in bad:print("  "+t['id']+" "+t['type']+" "+str(t['amount'])+" -> "+t.get('reason','unknown'))
    saveJ('accounts_updated_bad.json',{"accounts":accs})
    saveJ('transaction_log_bad.json',{"accepted":ok,"rejected":bad})

main()