#!/usr/bin/python2.2

# Copyright (C) 2002 John Goerzen
# <jgoerzen@complete.org>
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

from offlineimap import imaplib, imaputil, imapserver, repository, folder, mbnames, threadutil
from offlineimap.threadutil import InstanceLimitedThread
import re, os, os.path, offlineimap, sys
from ConfigParser import ConfigParser
from threading import *

# imaplib.Debug = 5

ui = offlineimap.ui.TTY.TTYUI()
ui.init_banner()

config = ConfigParser()
configfilename = os.path.expanduser("~/.offlineimaprc")
if not os.path.exists(configfilename):
    sys.stderr.write(" *** Config file %s does not exist; aborting!\n" % configfilename)
    sys.exit(1)
    
config.read(configfilename)

metadatadir = os.path.expanduser(config.get("general", "metadata"))
if not os.path.exists(metadatadir):
    os.mkdir(metadatadir, 0700)

accounts = config.get("general", "accounts")
accounts = accounts.replace(" ", "")
accounts = accounts.split(",")

server = None
remoterepos = None
localrepos = None
passwords = {}

threadutil.initInstanceLimit("ACCOUNTLIMIT", config.getint("general",
                                                           "maxsyncaccounts"))

# We have to gather passwords here -- don't want to have two threads
# asking for passwords simultaneously.

for account in accounts:
    if config.has_option(account, "remotepass"):
        passwords[account] = config.get(account, "remotepass")
    else:
        passwords[account] = ui.getpass(account, config)
    for instancename in ["FOLDER_" + account, "MSGCOPY_" + account]:
        threadutil.initInstanceLimit(instancename,
                                     config.getint(account, "maxconnections"))

mailboxes = []
mailboxlock = Lock()
def addmailbox(accountname, remotefolder):
    mailboxlock.acquire()
    mailboxes.append({'accountname' : accountname,
                      'foldername': remotefolder.getvisiblename()})
    mailboxlock.release()    
    
def syncaccount(accountname, *args):
    # We don't need an account lock because syncitall() goes through
    # each account once, then waits for all to finish.
    try:
        ui.acct(accountname)
        accountmetadata = os.path.join(metadatadir, accountname)
        if not os.path.exists(accountmetadata):
            os.mkdir(accountmetadata, 0700)
        host = config.get(accountname, "remotehost")
        user = config.get(accountname, "remoteuser")
        port = None
        if config.has_option(accountname, "remoteport"):
            port = config.getint(accountname, "remoteport")
        ssl = config.getboolean(accountname, "ssl")

        # Connect to the remote server.
        server = imapserver.IMAPServer(user, passwords[accountname],
                                       host, port, ssl,
                                       config.getint(accountname, "maxconnections"))
        remoterepos = repository.IMAP.IMAPRepository(config, accountname, server)

        # Connect to the Maildirs.
        localrepos = repository.Maildir.MaildirRepository(os.path.expanduser(config.get(accountname, "localfolders")))

        # Connect to the local cache.
        statusrepos = repository.LocalStatus.LocalStatusRepository(accountmetadata)

        ui.syncfolders(remoterepos, localrepos)
        remoterepos.syncfoldersto(localrepos)

        folderthreads = []
        for remotefolder in remoterepos.getfolders():
            thread = InstanceLimitedThread(\
                instancename = 'FOLDER_' + accountname,
                target = syncfolder,
                name = "syncfolder-%s-%s" % \
                (accountname, remotefolder.getvisiblename()),
                args = (accountname, remoterepos, remotefolder, localrepos,
                        statusrepos))
            thread.start()
            folderthreads.append(thread)
        threadutil.threadsreset(folderthreads)
        server.close()
    finally:
        pass

def syncfolder(accountname, remoterepos, remotefolder, localrepos,
               statusrepos):
    mailboxes.append({'accountname': accountname,
                      'foldername': remotefolder.getvisiblename()})
    # Load local folder.
    localfolder = localrepos.getfolder(remotefolder.getvisiblename())
    if not localfolder.isuidvalidityok(remotefolder):
        ui.validityproblem(remotefolder)
        return
    ui.syncingfolder(remoterepos, remotefolder, localrepos, localfolder)
    ui.loadmessagelist(localrepos, localfolder)
    localfolder.cachemessagelist()
    ui.messagelistloaded(localrepos, localfolder, len(localfolder.getmessagelist().keys()))

    # Load remote folder.
    ui.loadmessagelist(remoterepos, remotefolder)
    remotefolder.cachemessagelist()
    ui.messagelistloaded(remoterepos, remotefolder,
                         len(remotefolder.getmessagelist().keys()))

    # Load status folder.
    statusfolder = statusrepos.getfolder(remotefolder.getvisiblename())
    statusfolder.cachemessagelist()

    #

    if not statusfolder.isnewfolder():
        # Delete local copies of remote messages.  This way,
        # if a message's flag is modified locally but it has been
        # deleted remotely, we'll delete it locally.  Otherwise, we
        # try to modify a deleted message's flags!  This step
        # need only be taken if a statusfolder is present; otherwise,
        # there is no action taken *to* the remote repository.

        remotefolder.syncmessagesto_delete(localfolder, [localfolder,
                                                         statusfolder])
        ui.syncingmessages(localrepos, localfolder, remoterepos, remotefolder)
        localfolder.syncmessagesto(statusfolder, [remotefolder, statusfolder])

    # Synchronize remote changes.
    ui.syncingmessages(remoterepos, remotefolder, localrepos, localfolder)
    remotefolder.syncmessagesto(localfolder)

    # Make sure the status folder is up-to-date.
    ui.syncingmessages(localrepos, localfolder, statusrepos, statusfolder)
    localfolder.syncmessagesto(statusfolder)
    statusfolder.save()
    

def syncitall():
    mailboxes = []                      # Reset.
    threads = []
    for accountname in accounts:
        thread = InstanceLimitedThread(instancename = 'ACCOUNTLIMIT',
                                       target = syncaccount,
                                       name = "syncaccount-%s" % accountname,
                                       args = (accountname,))
        thread.start()
        threads.append(thread)
    # Wait for the threads to finish.
    threadutil.threadsreset(threads)

    mbnames.genmbnames(config, mailboxes)

syncitall()
if config.has_option('general', 'autorefresh'):
    refreshperiod = config.getint('general', 'autorefresh') * 60
    while 1:
        if ui.sleep(refreshperiod) == 2:
            break
        else:
            syncitall()