import win32api
import win32wnet
import sys
from winnetwk import *
import os

possible_shares = []

def _doDumpHandle(handle, level = 0):
		indent = " " * level
		while 1:
			items = win32wnet.WNetEnumResource(handle, 0)
			if len(items)==0:
				break
			for item in items:
				try:
					if item.dwDisplayType == RESOURCEDISPLAYTYPE_SHARE:
						print(indent + "Have share with name:", item.lpRemoteName)
						possible_shares.append(item)
					elif item.dwDisplayType == RESOURCEDISPLAYTYPE_GENERIC:
						print(indent + "Have generic resource with name:", item.lpRemoteName)
					else:
						# Try generic!
						print(indent + "Enumerating " + item.lpRemoteName, end=' ')
						k = win32wnet.WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY,0,item)
						print()
						_doDumpHandle(k, level + 1)
						win32wnet.WNetCloseEnum(k) # could do k.Close(), but this is a good test!
				except win32wnet.error as details:
					print(indent + "Couldn't enumerate this resource: " + details.strerror)

def TestOpenEnum():
	print("Enumerating all resources on the network - this may take some time...")
	handle = win32wnet.WNetOpenEnum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,0,None)

	try:
		_doDumpHandle(handle)
	finally:
		handle.Close()
	print("Finished dumping all resources.")

def findUnusedDriveLetter():
	existing = [x[0].lower() for x in win32api.GetLogicalDriveStrings().split('\0') if x]
	handle = win32wnet.WNetOpenEnum(RESOURCE_REMEMBERED,RESOURCETYPE_DISK,0,None)
	try:
		while 1:
			items = win32wnet.WNetEnumResource(handle, 0)
			if len(items)==0:
				break
			xtra = [i.lpLocalName[0].lower() for i in items if i.lpLocalName]
			existing.extend(xtra)
	finally:
		handle.Close()
	for maybe in 'defghijklmnopqrstuvwxyz':
		if maybe not in existing:
			return maybe
	raise RuntimeError("All drive mappings are taken?")

def TestConnection():
	if len(possible_shares)==0:
		print("Couldn't find any potential shares to connect to")
		return
	localName = findUnusedDriveLetter() + ':'
	for share in possible_shares:
		print("Attempting connection of", localName, "to", share.lpRemoteName)
		try:
			win32wnet.WNetAddConnection2(share.dwType, localName, share.lpRemoteName)
		except win32wnet.error as details:
			print("Couldn't connect: " + details.strerror)
			continue
		# Have a connection.
		try:
			fname = os.path.join(localName + "\\", os.listdir(localName + "\\")[0])
			try:
				print("Universal name of '%s' is '%s'" % (fname, win32wnet.WNetGetUniversalName(fname)))
			except win32wnet.error as details:
				print("Couldn't get universal name of '%s': %s" % (fname, details.strerror))
			print("User name for this connection is", win32wnet.WNetGetUser(localName))
		finally:
			win32wnet.WNetCancelConnection2(localName, 0, 0)
		# and do it again, but this time by using the more modern
		# NETRESOURCE way.
		nr = win32wnet.NETRESOURCE()
		nr.dwType = share.dwType
		nr.lpLocalName = localName
		nr.lpRemoteName = share.lpRemoteName
		win32wnet.WNetAddConnection2(nr)
		win32wnet.WNetCancelConnection2(localName, 0, 0)

		# and one more time using WNetAddConnection3
		win32wnet.WNetAddConnection3(0, nr)
		win32wnet.WNetCancelConnection2(localName, 0, 0)

		# Only do the first share that succeeds.
		break

def TestGetUser():
	u = win32wnet.WNetGetUser()
	print("Current global user is", repr(u))
	if u != win32wnet.WNetGetUser(None):
		raise RuntimeError("Default value didnt seem to work!")

TestGetUser()
TestOpenEnum()
TestConnection()
