#!/usr/bin/env python

import os
import zipfile
import re
import plistlib
import shutil
import json

from os.path import join


def xp_filename(basename):
    return re.sub('["<>*?|\\\\]', "_",
                  basename.replace("/", "-").replace(":", "."))


def versionify(version):
    return ".".join(filter(lambda x: x.isdigit(),
                           re.split("[-+.]", version))[:3])


def main(nwdir, nwpackage):
    if not os.path.isdir(nwdir):
        raise StandardError("input (%r) is not a directory" % nwdir)
    nwzip = zipfile.ZipFile(nwpackage)
    icnss = filter(lambda f: f.lower().endswith(".icns"),
                   nwzip.namelist())
    package = json.load(nwzip.open("package.json"))
    app = join(nwdir, "nwjs.app")
    title = package["window"]["title"]
    exe = package["name"].split(".")[-1]
    plist = dict(
        CFBundleDisplayName=title,
        CFBundleExecutable=exe,
        CFBundleIdentifier=package["name"],
        CFBundleInfoDictionaryVersion="6.0",
        CFBundleName=title,
        CFBundlePackageType="APPL",
        CFBundleShortVersionString=package["version"],
        CFBundleIconFile="nw.icns",
        CFBundleVersion=versionify(package["version"]),
        LSMinimumSystemVersion="10.6.0",
        NSPrincipalClass="NSApplication",
        NSSupportsAutomaticGraphicsSwitching=True,
    )
    if icnss:
        icnss.sort()
        os.remove(join(app, "Contents", "Resources", "nw.icns"))
        nwzip.extract(icnss[0], join(app, "Contents", "Resources"))
        plist["CFBundleIconFile"] = icnss[0]
    plistlib.writePlist(plist, join(app, "Contents/Info.plist"))
    exedir = join(app, "Contents", "MacOS")
    shutil.move(join(exedir, "nwjs"), join(exedir, exe))
    shutil.copy(nwpackage, join(app, "Contents", "Resources", "app.nw"))
    shutil.move(app, join(app, "..", xp_filename(title) + ".app"))

if __name__ == "__main__":
    import sys
    main(*sys.argv[1:])