import re, os, json, sys
from urllib import quote_plus, unquote_plus
from math import ceil, floor
from urllib2 import urlopen

groupnamepat = re.compile(r"^g\.(\w+)\$")
def splitpadname (padid):
    m = groupnamepat.match(padid)
    if m:
        return(m.group(1), padid[m.end():])
    else:
        return (u"", padid)

def padpath (padid, pub_path=u"", group_path=u""):
    g, p = splitpadname(padid)
    if type(g) == unicode:
        g = g.encode("utf-8")
    if type(p) == unicode:
        p = p.encode("utf-8")
    p = quote_plus(p)
    # p = p.replace(" ", "_")
    # p = p.replace("*", "-")
    if g:
        return os.path.join(group_path, g, p)
    else:
        return os.path.join(pub_path, p)

def padpath2id (path):
    if type(path) == unicode:
        path = path.encode("utf-8")
    dd, p = os.path.split(path)
    gname = dd.split("/")[-1]
    p = unquote_plus(p)
    if gname:
        return "{0}${1}".format(gname, p).decode("utf-8")
    else:
        return p.decode("utf-8")

def getjson (url):
    f = urlopen(url)
    data = f.read()
    f.close()
    return json.loads(data)

def loadpadinfo(p):
    with open(p) as f:
        info = json.load(f)
    return info

def progressbar (i, num, label="", file=sys.stderr):
    p = float(i) / num
    percentage = int(floor(p*100))
    bars = int(ceil(p*20))
    bar = ("*"*bars) + ("-"*(20-bars))
    msg = u"\r{0} {1}/{2} {3}... ".format(bar, (i+1), num, label)
    sys.stderr.write(msg.encode("utf-8"))
    sys.stderr.flush()