#!/usr/bin/python

import os
import sys
import random
import subprocess as sub

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

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 ":".join(ret)

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

COMMAND = sys.argv[1]
ARGS = sys.argv[2:]

def jar(jarfile, klass, *args):
   exec_storm_class(
        klass,
        childopts="-Dlog4j.configuration=storm.log.properties",
        jvmtype="-client",
        extrajars=[jarfile, CONF_DIR, STORM_DIR + "/bin"],
        args=args,
        prefix="export STORM_JAR=" + jarfile + ";")

def kill(name):
    exec_storm_class("backtype.storm.command.kill_topology", args=[name], jvmtype="-client", extrajars=[CONF_DIR, STORM_DIR + "/bin"], childopts="-Dlog4j.configuration=storm.log.properties")

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], childopts="-Dlog4j.configuration=storm.log.properties")
    os.system("rm " + tmpjarpath)

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

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

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


COMMANDS = {"jar": jar, "kill": kill, "shell": shell, "nimbus": nimbus, "ui": ui, "supervisor": supervisor}

COMMANDS[COMMAND](*ARGS)