import pycurl
import sys, getopt
from StringIO import StringIO
import json

####################################################################################################################################################################################
#                                                                                                                                                                                  #
# Export all active users to file - for 1602+                                                                                                                                      #
#                                                                                                                                                                                  #
# activation :                                                                                                                                                                     #
#       python exportUsers.py  [-s <scheme> | --scheme=<scheme> ] [-i <be host> | --ip=<be host>] [-p <be port> | --port=<be port> ] [-f <output file> | --ofile=<output file> ]   #
#                                                                                                                                                                                  #
# shortest activation (be host = localhost, be port = 8080):                                                                                                                       #
#        python exportUsers.py [-f <output file> | --ofile=<output file> ]                                                                                                         #
#                                                                                                                                                                                  #
####################################################################################################################################################################################

ALL_USERS_SUFFIX = '/sdc2/rest/v1/user/users'


def errorAndExit(errorCode, errorDesc):
    if errorCode > 0:
        print("status=" + str(errorCode) + ". " + errorDesc)
    else:
        print("status=" + str(errorCode))
    sys.exit(errorCode)


def getUsers(scheme, beHost, bePort, adminUser):
    try:
        buffer = StringIO()
        c = pycurl.Curl()

        url = scheme + '://' + beHost + ':' + bePort + ALL_USERS_SUFFIX
        print(url)
        c.setopt(c.URL, url)
        c.setopt(c.WRITEFUNCTION, buffer.write)
        # c.setopt(c.WRITEFUNCTION, lambda x: None)
        adminHeader = 'USER_ID: ' + adminUser
        c.setopt(pycurl.HTTPHEADER, ['Content-Type: application/json', 'Accept: application/json', adminHeader])

        if scheme == 'https':
            c.setopt(pycurl.SSL_VERIFYPEER, 0)
            c.setopt(pycurl.SSL_VERIFYHOST, 0)

        res = c.perform()
        # print(res)

        # print('Status: %d' % c.getinfo(c.RESPONSE_CODE))

        c.close()

        body = buffer.getvalue()

		# print(body)

        return body, None

    except Exception as inst:
        print(inst)
		# print type(inst)     # the exception instance
		# print inst.args      # arguments stored in .args
		# print inst           # __str__ allows args to be printed directly
		# x, y = inst.args
		# print 'x =', x

        return None, inst


def usage():
    print(sys.argv[0],
          '[optional -s <scheme> | --scheme=<scheme>, default http] [-i <be host> | --ip=<be host>] [-p <be port> | --port=<be port> ] [-f <output file> | --ofile=<output file> ]')


def main(argv):
    print('Number of arguments:', len(sys.argv), 'arguments.')

    adminHeader = 'jh0003'
    beHost = 'localhost'
    bePort = '8080'
    outputfile = None
    scheme = 'http'

    try:
        opts, args = getopt.getopt(argv, "i:p:f:h:s:", ["ip=", "port=", "ofile=", "scheme="])
    except getopt.GetoptError:
        usage()
        errorAndExit(2, 'Invalid input')

    for opt, arg in opts:
        # print opt, arg
        if opt == '-h':
            usage()
            sys.exit(3)
        elif opt in ("-i", "--ip"):
            beHost = arg
        elif opt in ("-p", "--port"):
            bePort = arg
        elif opt in ("-f", "--ofile"):
            outputfile = arg
        elif opt in ("-s", "--scheme"):
            scheme = arg

    print('scheme =', scheme, ', be host =', beHost, ', be port =', bePort, ', output file =', outputfile)

    if outputfile == None:
        usage()
        sys.exit(3)

    users = getUsers(scheme, beHost, bePort, adminHeader)
    error = users[1]
    body = users[0]

    if error is not None:
        errorAndExit(5, str(error))

    # print body

    io = StringIO(body)
    usersAsJson = json.load(io)

    writeFile = open(outputfile, 'w')

    json.dump(usersAsJson, writeFile)

    writeFile.close()

    print("-------------------------------------------")
    errorAndExit(0, None)


if __name__ == "__main__":
    main(sys.argv[1:])