#!/usr/bin/env python

import commands, os, sys
out=sys.stdout
err=sys.stderr
import py
import uconf

mailfn = "/etc/mail/user"

userlist = [
]

def inrange(uid):
    return 1000 <= uid < 2000

def getpassword():
    status,output = commands.getstatusoutput('passook')
    p = output.strip().lower()
    r = open('/dev/random', 'r')
    salt = r.read(8) 
    r.close()
    salt = "".join([ITOA64[ord(x) % 64] for x in salt])
    return p, unix_md5_crypt(p, salt) 
    
class Passwd:
    def __init__(self):
        self.reread()

    def reread(self):
        lines = open('/etc/passwd').readlines()
        self.entries = map(lambda x: x.split(':'), lines)
        uids = map(lambda x: int(x[2]), self.entries)
        uids = filter(inrange, uids)
        self.uids = uids

    def user_exists(self, name):
        for entry in self.entries:
            if name == entry[0]:
                return True

    def next_uid(self):
        for i in range(1000,1500):
            if i not in self.uids:
                self.uids.append(i)
                break
        return i

def execcmd(cmd):
    status, output = commands.getstatusoutput(cmd)
    if status:
        print "failed:",cmd
        print status,output
        raise SystemExit
    print >>err, "   exec_ok:",cmd
   
#def execcmd(cmd): 
#    print "execing:", cmd  
passwd = Passwd()

def make_user(username, realname, email):
    global mailfn
    if passwd.user_exists(username):
        usage("user exists: %s" %username) 
    uid = passwd.next_uid()
    password = uconf.Password() 
    crypt = password.hashspec 
    clear = password.clear 

    if not uconf.system.hasgroup(username): 
        cmd = 'groupadd %(username)s' % locals()
        execcmd(cmd)
    cmd = "adduser -c '%(realname)s' -u %(uid)d -g %(username)s -G svnusers -p '%(crypt)s' -s /bin/bash  %(username)s" % locals()
    execcmd(cmd)
    cmd = 'mkdir -p /home/%(username)s/.ssh' % locals() 
    execcmd(cmd)
    cmd = 'touch /home/%(username)s/.ssh/authorized_keys' % locals() 
    execcmd(cmd)
    cmd = 'echo "%(clear)s" >/home/%(username)s/.ssh/password' % locals()
    execcmd(cmd)
    cmd = 'chown -R %(username)s:%(username)s /home/%(username)s' % locals()
    execcmd(cmd)
    cmd = 'chmod -R 755 /home/%(username)s' % locals()
    execcmd(cmd)
    cmd = 'chmod 700 /home/%(username)s/.ssh' % locals()
    execcmd(cmd)
    cmd = 'chmod 700 /home/%(username)s/.ssh/password' % locals()
    execcmd(cmd)
    print "codespeak account created for %(realname)s (%(email)s)" % locals()
    print "%(username)s pass: %(clear)s" % locals()
    mailfn = py.path.local(mailfn) 
    lines = mailfn.readlines(cr=0)
    lines.append("%s: %s" %(username, email))
    mailfn.write("\n".join(lines))
    print "username/email info written to", mailfn 

def usage(msg):
    print 'usage: %s "username" "realname" "email"' % sys.argv[0]
    print msg
    raise SystemExit, 1 

if __name__ == '__main__':
    args = sys.argv[1:]
    if len(args) != 3:
        usage("need exactly three arguments")
    username, realname, email = args
    assert "@" in email, "%r must be a valid email-adrress" % email
    make_user(username, realname, email)