#!/usr/bin/python3
import os,sys,html,json,datetime
import urllib.parse,urllib.request

if os.environ['SERVER_NAME']!='chrisoft.org':
	import socks,socket
	socks.set_default_proxy(socks.SOCKS5,"127.0.0.1",1080)
	socket.socket=socks.socksocket
	def getaddrinfo(*args):
		return [(socket.AF_INET,socket.SOCK_STREAM,6,'',(args[0],args[1]))]
	socket.getaddrinfo=getaddrinfo

def fail(x=None):
	print('Status: 400 Bad Request',end='\r\n')
	print('Content-type: text/plain',end='\r\n')
	print(end='\r\n')
	print('400.')
	if x is not None:print(x)
	exit()

if os.environ['REQUEST_METHOD']!='POST':
	fail()
try:
	f=json.load(sys.stdin)
except Exception:
	fail()

try:
	mname=urllib.parse.unquote(f['mname'],encoding='utf-8')
	mcontent=urllib.parse.unquote(f['mcontent'],encoding='utf-8')
	mname=html.escape(mname)
	mcontent=html.escape(mcontent).replace('\n','<br>')
	mtime=datetime.datetime.now(tz=datetime.timezone(datetime.timedelta(hours=8))).strftime('%Y-%m-%d %H:%M')
except Exception as e:
	fail()

if len(mname)+len(mcontent)>16384:
	fail(x=':)')

try:
	with open(os.environ['DOCUMENT_ROOT']+'/grecaptcha_key',mode='r',encoding='utf-8') as gr_secret_f:
		gr_secret=gr_secret_f.read()
	req={'secret':gr_secret,'response':f['gr_ret'],'remoteip':os.environ['REMOTE_ADDR']}
	r=urllib.request.Request('https://www.google.com/recaptcha/api/siteverify',data=urllib.parse.urlencode(req).encode('utf-8'),method='POST')
	rr=urllib.request.urlopen(r,timeout=5)
	rsp=json.loads(str(rr.read(),'utf-8'))
	if not rsp['success'] or rsp['score']<0.6:
		fail(x=':)')
except Exception as e:
	fail(x=e)

print('Status: 200 OK',end='\r\n')
print('Content-type: text/plain',end='\r\n')
print(end='\r\n')

msgp=os.environ['DOCUMENT_ROOT']+'/leave-a-message/messages'
with open(msgp,mode='r',encoding='utf-8') as f:
	o=json.load(f)
newm={'cont':mcontent,'author':mname,'time':mtime}
o.append(newm)
with open(msgp,mode='w',encoding='utf-8') as f:
	json.dump(o,f)

archivp=os.environ['DOCUMENT_ROOT']+'/leave-a-message/archive.txt'
with open(archivp,mode='a',encoding='utf-8') as f:
	f.write(f'comment: {mcontent}\n')
	f.write(f'author: {mname}\n')
	f.write(f'time: {mtime}\n')
	f.write(f'IP: {os.environ["REMOTE_ADDR"]}\n\n')