#!/usr/bin/python2

# this version cannot tell if a stream is running or just ordinary music
import os
import sys
from subprocess import Popen, PIPE

os.chdir(os.path.dirname(os.path.realpath(sys.argv[0])))
pidfile = "/tmp/krebs.stream.pid"
host="lounge.mpd.shack"
url_file = os.environ.get("STREAM_DB", "stream.db")
urls = []
#urls = [ url,f for (url,f) in open(url_file).readline() ]
for line in open(url_file):
    urls.append(line.split())
#print urls
mybin = sys.argv[0]
cmd = sys.argv[1] if len(sys.argv) > 1 else "you-are-made-of-stupid"
stream = sys.argv[2] if len(sys.argv) == 3 else "groove"
pipe_silent = open("/dev/null","w")

def urlForStream(stream):
    for url, s in urls:
        if s == stream:
            return url

def streamForUrl(url):
    for u, s in urls:
        if u == url:
            return stream 

def startStream(stream_url):
    Popen(["mpc","--host",host,"crossfade","5"],
            stdout=pipe_silent,stderr=pipe_silent)
    Popen(["mpc","--host",host,"repeat","yes"],
            stdout=pipe_silent,stderr=pipe_silent)
    Popen(["mpc","--host",host,"clear"],
            stdout=pipe_silent,stderr=pipe_silent)
    Popen(["mpc","--host",host,"add",stream_url],
            stdout=pipe_silent,stderr=pipe_silent).wait()
    Popen(["mpc","--host",host,"play"],
            stdout=pipe_silent,stderr=pipe_silent)

def start(stream):
    ret = running()
    if ret:
        print "!! Stream `%s` already running !" % \
                (ret)
    else:
        startStream(urlForStream(stream))
        print "** Starting `%s`."% stream


def stop():
    ret = running()
    if not ret:
        print "!! No Stream running!"
    else:
        print "** Stopping `%s`" % ret
        Popen(["mpc","--host",host,"stop"],
            stdout=pipe_silent,stderr=pipe_silent)
        

def running():
    try:
        (out,err) = Popen(["mpc","--host",host,"current"],stdout=PIPE,stderr=PIPE).communicate()
        out = out.rstrip()
        return out
    except Exception as e:
        return ""


def slist():
    for url, name in urls:
        print "%s : %s" % (name, url)


def shorthelp():
    print "start|stop|restart|status|list [audio stream]"


def longhelp():
    print "Usage: %s" % mybin,
    shorthelp
    print """ get all available streams with '/%(fil)s list'
    Examples:
    %(fil)s list
    %(fil)s start groove
    %(fil)s switch deepmix
    %(fil)s status
    %(fil)s stop""" % {'fil': mybin}

if cmd == "start":
    start(stream)
elif cmd == "stop":
    stop()
elif cmd == "switch" or cmd == "restart":
    stop()
    start(stream)
elif cmd == "status":
    ret = running()
    if not ret:
        print "** nothing running"  # , e
    else:
        print "Now Playing: %s" % ret
elif cmd == "list":
    slist()
elif cmd == "--help":
    longhelp()
elif cmd == "-h":
    shorthelp()
else:
    print "unknown command `%s`" % cmd
    print "try `%s` --help" % os.path.basename(mybin)