#!/usr/bin/env python3

"""
test.unit_tests_d.ut_dep: dependency unit tests for the MMGen suite

  Test whether dependencies are installed and functional.
  No data verification is performed.
"""

from subprocess import run,PIPE

from mmgen.common import *
from mmgen.exception import NoLEDSupport
from ..include.common import cfg,vmsg,check_solc_ver

class unit_tests:

	altcoin_deps = ('pysha3','py_ecc','solc')
	win_skip = ('aiohttp','pysha3','led')

	def led(self,name,ut):
		from mmgen.led import LEDControl
		try:
			LEDControl(enabled=True)
		except NoLEDSupport:
			ymsg('Warning: no LED support on this platform')
		else:
			gmsg('LED support found!')
		return True

	def pysha3(self,name,ut): # ETH,XMR
		import platform
		major,minor,_ = [int(s) for s in platform.python_version_tuple()]
		if major > 3 or (major == 3 and minor >= 11):
			ymsg(f'Skipping pysha3 for Python version {major}.{minor}')
		else:
			from sha3 import keccak_256
		return True

	def py_ecc(self,name,ut): # ETH
		from py_ecc.secp256k1 import privtopub
		return True

	def pysocks(self,name,ut):
		import requests,urllib3
		urllib3.disable_warnings()
		session = requests.Session()
		session.trust_env = False
		session.proxies.update({'https':'socks5h://127.243.172.8:20677'})
		try:
			session.get('https://127.188.29.17')
		except Exception as e:
			if type(e).__name__ == 'ConnectionError':
				return True
			else:
				print(e)
		return False

	def secp256k1(self,name,ut):
		from mmgen.proto.secp256k1.secp256k1 import priv2pub
		priv2pub(bytes.fromhex('deadbeef'*8),1)
		return True

	def cryptography(self,name,ut):
		from cryptography.hazmat.primitives.ciphers import Cipher,algorithms,modes
		from cryptography.hazmat.backends import default_backend
		c = Cipher(algorithms.AES(b'deadbeef'*4),modes.CTR(b'deadbeef'*2),backend=default_backend())
		encryptor = c.encryptor()
		enc_data = encryptor.update(b'foo') + encryptor.finalize()
		return True

	def ecdsa(self,name,ut):
		import ecdsa
		pko = ecdsa.SigningKey.from_secret_exponent(12345678901234,curve=ecdsa.SECP256k1)
		pubkey = pko.get_verifying_key().to_string().hex()
		return True

	def ripemd160(self,name,ut):
		import hashlib
		if hashlib.new.__name__ == 'hashlib_new_wrapper':
			ymsg('Warning: RIPEMD160 missing in hashlib, falling back on pure-Python implementation')
		hashlib.new('ripemd160')
		return True

	def gmpy(self,name,ut):
		from gmpy2 import context,set_context,sqrt,cbrt
		# context() parameters are platform-dependent!
		set_context(context(precision=75,round=1)) # OK for gmp 6.1.2 / gmpy 2.1.0
		return True

	def aiohttp(self,name,ut):
		import asyncio,aiohttp
		async def do():
			async with aiohttp.ClientSession(
				headers = { 'Content-Type': 'application/json' },
				connector = aiohttp.TCPConnector(),
			) as session:
				pass
		asyncio.run(do())
		return True

	def pexpect(self,name,ut):
		import pexpect
		from pexpect.popen_spawn import PopenSpawn
		return True

	def scrypt(self,name,ut):
		passwd,salt = b'foo',b'bar'
		N,r,p = 4,8,16
		buflen = 64

		vmsg('Testing builtin scrypt module (hashlib)')
		from hashlib import scrypt # max N == 14!!
		scrypt(password=passwd,salt=salt,n=2**N,r=r,p=p,maxmem=0,dklen=buflen)

		vmsg('Testing standalone scrypt module')
		import scrypt
		scrypt.hash(passwd, salt, N=2**N, r=r, p=p, buflen=buflen)

		return True

	def solc(self,name,ut):
		from mmgen.protocol import init_proto
		solc_ok = check_solc_ver()
		if solc_ok:
			cmd = [
				'python3',
				'scripts/create-token.py',
				'--coin=ETH',
				'--name=My Fake Token',
				'--symbol=FAKE',
				'--supply=100000000000000000000000000',
				'--decimals=18',
				'--stdout',
				init_proto( cfg, 'eth' ).checksummed_addr('deadbeef'*5),
			]
			cp = run(cmd,stdout=PIPE,stderr=PIPE)
			vmsg(cp.stderr.decode())
			if cp.returncode:
				msg(cp.stderr.decode())
				return False
		return True