import optparse
import sys
import subprocess

from wizard import deploy, log

def main(argv, baton):
    options, args = parse_args(argv)
    d = deploy.Deployment(args[0])
    d.log # force the log to be loaded, to pre-empt errors
    with PipeToLess():
        print_log(d, options)

def parse_args(argv):
    usage = """usage: %prog info [ARGS] DIR

Prints information about an autoinstalled directory,
including its history and current version."""
    parser = optparse.OptionParser(usage)
    parser.add_option("--reverse", dest="reverse", action="store_true",
            default=False, help="Print entries in chronological order (default is reverse)")
    options, args = parser.parse_args(argv)
    if len(args) > 1:
        parser.error("too many arguments")
    elif not args:
        parser.error("must specify directory")
    return options, args

def print_log(d, options):
    if options.reverse:
        dlog = reversed(d.log)
    else:
        dlog = d.log
    for entry in dlog:
        print "%s %s" % (entry.version.application.name, entry.version.version)
        print "User: %s" % entry.user
        print "Date: %s" % entry.datetime.strftime("%a %b %0d %H:%M:%S %Y %z")
        print
        info = "Unknown"
        if isinstance(entry.source, log.TarballInstall):
            info = "Installed with tarball at:\n%s" % \
                prettify(entry.source.location)
        print indent(info, 4)
        print

class PipeToLess(object):
    def __enter__(self):
        self.proc = subprocess.Popen("less", stdin=subprocess.PIPE)
        self.old_stdout = sys.stdout
        sys.stdout = self.proc.stdin
    def __exit__(self, *args):
        if self.proc:
            self.proc.stdin.close()
            self.proc.wait()
            sys.stdout = self.old_stdout

def prettify(loc):
    return loc.replace("/afs/athena.mit.edu/contrib/scripts", "~scripts")

def indent(text, indent):
    # There should be a built-in
    return "\n".join([" " * indent + x for x in text.split("\n")])