# RequestServiceExample.py
from __future__ import print_function
from __future__ import absolute_import

import time
import threading
from optparse import OptionParser, OptionValueError

import os
import platform as plat
import sys
if sys.version_info >= (3, 8) and plat.system().lower() == "windows":
    # pylint: disable=no-member
    with os.add_dll_directory(os.getenv('BLPAPI_LIBDIR')):
        import blpapi
else:
    import blpapi

RESOLUTION_SUCCESS = blpapi.Name("ResolutionSuccess")
SESSION_TERMINATED = blpapi.Name("SessionTerminated")

g_running = True
g_mutex = threading.Lock()


class MyProviderEventHandler(object):
    def __init__(self, serviceName):
        self.serviceName = serviceName

    def processEvent(self, event, session):
        global g_running

        print("Server received an event")
        if event.eventType() == blpapi.Event.SESSION_STATUS:
            for msg in event:
                print(msg)
                if msg.messageType() == SESSION_TERMINATED:
                    g_running = False

        elif event.eventType() == blpapi.Event.RESOLUTION_STATUS:
            for msg in event:
                print(msg)

        elif event.eventType() == blpapi.Event.REQUEST:
            service = session.getService(self.serviceName)
            for msg in event:
                print(msg)

                if msg.messageType() == blpapi.Name("ReferenceDataRequest"):
                    # Similar to createPublishEvent. We assume just one
                    # service - self.serviceName. A responseEvent can only be
                    # for single request so we can specify the correlationId -
                    # which establishes context - when we create the Event.

                    if msg.hasElement("timestamp"):
                        requestTime = msg.getElementAsFloat("timestamp")
                        latency = time.time() - requestTime
                        print("Response latency =", latency)

                    response = \
                        service.createResponseEvent(msg.correlationIds()[0])
                    ef = blpapi.EventFormatter(response)

                    # In appendResponse the string is the name of the
                    # operation, the correlationId indicates which request we
                    # are responding to.
                    ef.appendResponse("ReferenceDataRequest")
                    securities = msg.getElement("securities")
                    fields = msg.getElement("fields")
                    ef.setElement("timestamp", time.time())
                    ef.pushElement("securityData")
                    for security in securities.values():
                        ef.appendElement()
                        ef.setElement("security", security)
                        ef.pushElement("fieldData")

                        for field in fields.values():
                            ef.appendElement()
                            ef.setElement("fieldId", field)
                            ef.pushElement("data")
                            ef.setElement("doubleValue", time.time())
                            ef.popElement()
                            ef.popElement()

                        ef.popElement()
                        ef.popElement()

                    # Service is implicit in the Event. sendResponse has a
                    # second parameter - partialResponse - that defaults to
                    # false.
                    session.sendResponse(response)

        else:
            for msg in event:
                print(msg)
        return True


class MyRequesterEventHandler(object):
    def processEvent(self, event, session):
        print("Client received an event")
        for msg in event:
            print(msg)


def authOptionCallback(option, opt, value, parser):
    """Parse authorization options from user input"""

    vals = value.split('=', 1)

    if value == "user":
        authUser = blpapi.AuthUser.createWithLogonName()
        authOptions = blpapi.AuthOptions.createWithUser(authUser)
    elif value == "none":
        authOptions = None
    elif vals[0] == "app" and len(vals) == 2:
        appName = vals[1]
        authOptions = blpapi.AuthOptions.createWithApp(appName)
    elif vals[0] == "userapp" and len(vals) == 2:
        appName = vals[1]
        authUser = blpapi.AuthUser.createWithLogonName()
        authOptions = blpapi.AuthOptions\
            .createWithUserAndApp(authUser, appName)
    elif vals[0] == "dir" and len(vals) == 2:
        activeDirectoryProperty = vals[1]
        authUser = blpapi.AuthUser\
            .createWithActiveDirectoryProperty(activeDirectoryProperty)
        authOptions = blpapi.AuthOptions.createWithUser(authUser)
    elif vals[0] == "manual":
        parts = []
        if len(vals) == 2:
            parts = vals[1].split(',')

        if len(parts) != 3:
            raise OptionValueError("Invalid auth option {}".format(value))

        appName, ip, userId = parts

        authUser = blpapi.AuthUser.createWithManualOptions(userId, ip)
        authOptions = blpapi.AuthOptions.createWithUserAndApp(authUser, appName)
    else:
        raise OptionValueError("Invalid auth option '{}'".format(value))

    parser.values.auth = {'option' : authOptions}

def parseCmdLine():
    parser = OptionParser()
    parser.add_option("-a",
                      "--ip",
                      dest="hosts",
                      help="server name or IP (default: localhost)",
                      metavar="ipAddress",
                      action="append",
                      default=[])
    parser.add_option("-p",
                      dest="port",
                      type="int",
                      help="server port (default: %default)",
                      metavar="tcpPort",
                      default=8194)
    parser.add_option("--service",
                      dest="service",
                      help="service name (default: %default)",
                      metavar="service",
                      default="//example/refdata")
    parser.add_option("-s",
                      dest="securities",
                      help="request security (default: IBM US Equity)",
                      metavar="security",
                      action="append",
                      default=[])
    parser.add_option("-f",
                      dest="fields",
                      help="request field (default: PX_LAST)",
                      metavar="field",
                      action="append",
                      default=[])
    parser.add_option("-r",
                      dest="role",
                      type="choice",
                      choices=["server", "client", "both"],
                      help="service role option: server|client|both " +
                           "(default: %default)",
                      metavar="option",
                      default="both")
    parser.add_option("--auth",
                      dest="auth",
                      help="authentication option: "
                           "user|none|app=<app>|userapp=<app>|dir=<property>"
                           "|manual=<app,ip,user>"
                           " (default: user)\n"
                           "'none' is applicable to Desktop API product "
                           "that requires Bloomberg Professional service "
                           "to be installed locally.",
                      metavar="option",
                      action="callback",
                      callback=authOptionCallback,
                      type="string",
                      default={"option" :
                               blpapi.AuthOptions.createWithUser(
                                      blpapi.AuthUser.createWithLogonName())})

    (options, _) = parser.parse_args()

    if not options.hosts:
        options.hosts = ["localhost"]

    if not options.securities:
        options.securities = ["IBM US Equity"]

    if not options.fields:
        options.fields = ["PX_LAST"]

    return options


def serverRun(session, options):
    print("Server is starting------")

    if not session.start():
        print("Failed to start server session.")
        return

    if not session.registerService(options.service):
        print("Failed to register", options.service)
        return


def clientRun(session, options):
    print("Client is starting------")

    if not session.start():
        print("Failed to start client session.")
        return

    if not session.openService(options.service):
        print("Failed to open", options.service)
        return

    service = session.getService(options.service)
    request = service.createRequest("ReferenceDataRequest")

    # append securities to request
    # Add securities to request
    securities = request.getElement("securities")
    for security in options.securities:
        securities.appendValue(security)

    # Add fields to request
    fields = request.getElement("fields")
    for field in options.fields:
        fields.appendValue(field)

    request.set("timestamp", time.time())

    print("Sendind Request:", request)

    eventQueue = blpapi.EventQueue()
    session.sendRequest(
        request, None, blpapi.CorrelationId("AddRequest"), eventQueue)

    while True:
        # Specify timeout to give a chance for Ctrl-C
        event = eventQueue.nextEvent(500)

        if event.eventType() == blpapi.Event.TIMEOUT:
            continue

        print("Client received an event")
        for msg in event:
            with g_mutex:
                if event.eventType() == blpapi.Event.RESPONSE:
                    if msg.hasElement("timestamp"):
                        responseTime = msg.getElementAsFloat("timestamp")
                        print("Response latency =", time.time() - responseTime)
                print(msg)

        if event.eventType() == blpapi.Event.RESPONSE:
            break


def main():
    options = parseCmdLine()

    # Fill SessionOptions
    sessionOptions = blpapi.SessionOptions()
    for idx, host in enumerate(options.hosts):
        sessionOptions.setServerAddress(host, options.port, idx)
    sessionOptions.setSessionIdentityOptions(options.auth['option'])
    sessionOptions.setAutoRestartOnDisconnection(True)
    sessionOptions.setNumStartAttempts(len(options.hosts))

    print("Connecting to port %d on %s" % (
        options.port, ", ".join(options.hosts)))

    providerEventHandler = MyProviderEventHandler(options.service)
    providerSession = blpapi.ProviderSession(sessionOptions,
                                             providerEventHandler.processEvent)

    requesterEventHandler = MyRequesterEventHandler()
    requesterSession = blpapi.Session(sessionOptions,
                                      requesterEventHandler.processEvent)

    if options.role in ["server", "both"]:
        serverRun(providerSession, options)

    if options.role in ["client", "both"]:
        clientRun(requesterSession, options)

    # wait for enter key to exit application
    print("Press ENTER to quit")
    input()

    if options.role in ["server", "both"]:
        providerSession.stop()

    if options.role in ["client", "both"]:
        requesterSession.stop()


if __name__ == "__main__":
    print("RequestServiceExample")
    try:
        main()
    except KeyboardInterrupt:
        print("Ctrl+C pressed. Stopping...")

__copyright__ = """
Copyright 2012. Bloomberg Finance L.P.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:  The above
copyright notice and this permission notice shall be included in all copies
or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
"""