#!/usr/bin/env python

import sys, os, time
from persifs import *

def usage():
    print "Usage: %s {now|info|log <file>}" % sys.argv[0]
    sys.exit(1)

def traceLog(pd, timedir, path):
    while True:
        fullpath = os.path.join(pd, timedir, path)
        if not os.path.exists(fullpath):
            return
        stat = os.stat(fullpath)
        print pathAtTime(pd, path, stat.st_mtime + 1)
        timedir = time.strftime(timeFormat, time.localtime(stat.st_mtime - 1))

def main():
    if sys.argv[1] == "now" and len(sys.argv) == 2:
        pd, dir, path = findPersifs()
        if dir != nowDir:
            print "Current directory is not the current directory"
            sys.exit(1)
        print pathAtTime(pd, path, time.time())
    elif sys.argv[1] == "info" and len(sys.argv) == 2:
        pd, x, x = findPersifs()
        print file(os.path.join(pd, ".persifs")).read().strip()
    elif sys.argv[1] == "log" and len(sys.argv) == 3:
        pd, dir, path = findPersifs()
        name = sys.argv[2]
        traceLog(pd, dir, os.path.join(path, name))
    else:
        usage()

if __name__ == "__main__":
    main()