#!/usr/bin/python

import os
import sys
import random
import subprocess as sub

def identity(x):
  return x

def cygpath(x):
  command = ["cygpath", "-wp", x]
  p = sub.Popen(command,stdout=sub.PIPE)
  output, errors = p.communicate()
  lines = output.split("\n")
  return lines[0]

if sys.platform == "cygwin":
  normclasspath = cygpath
else:
  normclasspath = identity

CONF_DIR = os.path.expanduser("~/.storm")
STORM_DIR = "/".join(os.path.abspath( __file__ ).split("/")[:-2])

if not os.path.exists(STORM_DIR + "/RELEASE"):
  print "******************************************"
  print "The storm client can only be run from within a release. You appear to be trying to run the client from a checkout of Storm's source code."
  print "\nYou can download a Storm release at https://github.com/nathanmarz/storm/downloads"
  print "******************************************"
  sys.exit(1)  

def get_jars_full(adir):
    files = os.listdir(adir)
    ret = []
    for f in files:
        if f.endswith(".jar"):
            ret.append(adir + "/" + f)
    return ret

def get_classpath(extrajars):
    ret = get_jars_full(STORM_DIR)
    ret.extend(get_jars_full(STORM_DIR + "/lib"))
    ret.extend(extrajars)
    return normclasspath(":".join(ret))

def confvalue(name, extrapaths):
    cp = get_classpath(extrapaths)
    command = ["java", "-client", "-cp", cp, "backtype.storm.command.config_value", name]
    p = sub.Popen(command,stdout=sub.PIPE)
    output, errors = p.communicate()
    lines = output.split("\n")
    for line in lines:
        tokens = line.split(" ")
        if tokens[0] == "VALUE:":
            return tokens[1]

def print_localconfvalue(name):
  print name + ": " + confvalue(name, [CONF_DIR])

def print_remoteconfvalue(name):
  print name + ": " + confvalue(name, [STORM_DIR + "/conf"])

def exec_storm_class(klass, jvmtype="-server", childopts="", extrajars=[], args=[]):
    nativepath = confvalue("java.library.path", extrajars)
    command = "java " + jvmtype + " -Djava.library.path=" + nativepath + " " + childopts + " -cp " + get_classpath(extrajars) + " " + klass + " " + " ".join(args)
    print "Running: " + command    
    os.system(command)

def jar(jarfile, klass, *args):
   exec_storm_class(
        klass,
        jvmtype="-client",
        extrajars=[jarfile, CONF_DIR, STORM_DIR + "/bin"],
        args=args,
        childopts="-Dstorm.jar=" + jarfile)

def kill(*args):
    exec_storm_class("backtype.storm.command.kill_topology", args=args, jvmtype="-client", extrajars=[CONF_DIR, STORM_DIR + "/bin"])

def activate(*args):
    exec_storm_class("backtype.storm.command.activate", args=args, jvmtype="-client", extrajars=[CONF_DIR, STORM_DIR + "/bin"])

def deactivate(*args):
    exec_storm_class("backtype.storm.command.deactivate", args=args, jvmtype="-client", extrajars=[CONF_DIR, STORM_DIR + "/bin"])

def rebalance(*args):
    exec_storm_class("backtype.storm.command.rebalance", args=args, jvmtype="-client", extrajars=[CONF_DIR, STORM_DIR + "/bin"])

def shell(resourcesdir, command, *args):
    tmpjarpath = "stormshell" + str(random.randint(0, 10000000)) + ".jar"
    os.system("jar cf %s %s" % (tmpjarpath, resourcesdir))
    runnerargs = [tmpjarpath, command]
    runnerargs.extend(args)
    exec_storm_class("backtype.storm.command.shell_submission", args=runnerargs, jvmtype="-client", extrajars=[CONF_DIR])
    os.system("rm " + tmpjarpath)

def repl():
    cppaths = [STORM_DIR + "/conf"]
    exec_storm_class("clojure.lang.Repl", jvmtype="-client", extrajars=cppaths)

def nimbus():
    cppaths = [STORM_DIR + "/log4j", STORM_DIR + "/conf"]
    childopts = confvalue("nimbus.childopts", cppaths) + " -Dlogfile.name=nimbus.log -Dlog4j.configuration=storm.log.properties"
    exec_storm_class("backtype.storm.daemon.nimbus", jvmtype="-server", extrajars=cppaths, childopts=childopts)

def supervisor():
    cppaths = [STORM_DIR + "/log4j", STORM_DIR + "/conf"]
    childopts = confvalue("nimbus.childopts", cppaths) + " -Dlogfile.name=supervisor.log -Dlog4j.configuration=storm.log.properties"
    exec_storm_class("backtype.storm.daemon.supervisor", jvmtype="-server", extrajars=cppaths, childopts=childopts)

def ui():
    childopts = "-Xmx768m -Dlogfile.name=ui.log -Dlog4j.configuration=storm.log.properties"
    exec_storm_class("backtype.storm.ui.core", jvmtype="-server", childopts=childopts, extrajars=[STORM_DIR + "/log4j", STORM_DIR, STORM_DIR + "/conf"])

def drpc():
    childopts = "-Xmx768m -Dlogfile.name=drpc.log -Dlog4j.configuration=storm.log.properties"
    exec_storm_class("backtype.storm.daemon.drpc", jvmtype="-server", childopts=childopts, extrajars=[STORM_DIR + "/log4j", STORM_DIR + "/conf"])

def print_classpath():
  print get_classpath([])

COMMANDS = {"jar": jar, "kill": kill, "shell": shell, "nimbus": nimbus, "ui": ui,
            "drpc": drpc, "supervisor": supervisor, "localconfvalue": print_localconfvalue,
            "remoteconfvalue": print_remoteconfvalue, "repl": repl, "classpath": print_classpath,
            "activate": activate, "deactivate": deactivate, "rebalance": rebalance}

def print_commands():
    global COMMANDS
    cmds = COMMANDS.keys()
    cmds.sort()
    print "Commands:\n\t", reduce(lambda x,y: x + '\n\t' + y, cmds[1:], cmds[0])
    print "\nDocumentation for the storm client can be found at https://github.com/nathanmarz/storm/wiki/Command-line-client\n"

def print_usage(msg=None):
    if msg != None:
        print msg
    print_commands()

def main():
    if len(sys.argv) <= 1:
        print_usage()
        sys.exit(-1)

    COMMAND = sys.argv[1]
    ARGS = sys.argv[2:]
    COMMANDS[COMMAND](*ARGS)
    
if __name__ == "__main__":
    main()