#!/usr/bin/perl

#
# Copyright (C) Roman Dmitiriev, rnd@rajven.ru
#

use utf8;
use open ":encoding(utf8)";
use Encode;
no warnings 'utf8';
use English;
use base;
use FindBin '$Bin';
use lib "/opt/Eye/scripts";
use Data::Dumper;
use eyelib::config;
use eyelib::main;
use eyelib::database;
use eyelib::common;
use eyelib::net_utils;
use strict;
use warnings;
use Getopt::Long;
use Proc::Daemon;
use Cwd;
use Net::Netmask;
use DateTime;

my $mute_time=300;

my $pf = '/run/eye/stat-sync.pid';

my $daemon = Proc::Daemon->new(
        pid_file => $pf,
        work_dir => $HOME_DIR
);

# are you running?  Returns 0 if not.
my $pid = $daemon->Status($pf);

my $daemonize = 1;

GetOptions(
    'daemon!' => \$daemonize,
    "help"    => \&usage,
    "reload"  => \&reload,
    "restart" => \&restart,
    "start"   => \&run,
    "status"  => \&status,
    "stop"    => \&stop
) or &usage;

exit(0);

sub stop {
        if ($pid) {
                print "Stopping pid $pid...";
                if ($daemon->Kill_Daemon($pf)) {
                        print "Successfully stopped.\n";
                } else {
                        print "Could not find $pid.  Was it running?\n";
                }
         } else {
                print "Not running, nothing to stop.\n";
         }
}

sub status {
        if ($pid) {
                print "Running with pid $pid.\n";
        } else {
                print "Not running.\n";
        }
}

sub run {
if (!$pid) {
    print "Starting...";
    if ($daemonize) {
        # when Init happens, everything under it runs in the child process.
        # this is important when dealing with file handles, due to the fact
        # Proc::Daemon shuts down all open file handles when Init happens.
        # Keep this in mind when laying out your program, particularly if
        # you use filehandles.
        $daemon->Init;
        }

    setpriority(0,0,19);

    my %leases;

    while (1) {

        eval {

        # Create new database handle. If we can't connect, die()
        my $hdb = init_db();

        #process dhcp queue per 10 sec.
        my @dhcp_events = get_records_sql($hdb,"SELECT * FROM dhcp_queue");
        if (@dhcp_events and scalar @dhcp_events) {
            foreach my $dhcp (@dhcp_events) {
                process_dhcp_request($hdb, $dhcp->{action}, $dhcp->{mac}, $dhcp->{ip}, $dhcp->{dhcp_hostname}, '', '', '')
                        unless exists $leases{$dhcp->{ip}} && $leases{$dhcp->{ip}}{'action'} ne $dhcp->{action} && time() - $leases{$dhcp->{ip}}{'last_time'} <= $mute_time;
                $leases{$dhcp->{ip}}=$dhcp;
                do_sql($hdb,"DELETE FROM dhcp_queue WHERE id=".$dhcp->{id});
                }
            }

        #udpate 
        if (time()-$last_refresh_config>=60)  {

            #refresh settings
            init_option($hdb);

            $urgent_sync=get_option($hdb,50);
            if ($urgent_sync) {
                    #clean changed for dynamic clients or hotspot
        	    do_sql($hdb,"UPDATE User_auth SET changed=0 WHERE ou_id=".$default_user_ou_id." OR ou_id=".$default_hotspot_ou_id);
                    do_sql($hdb,"UPDATE User_auth SET dhcp_changed=0 WHERE ou_id=".$default_user_ou_id." OR ou_id=".$default_hotspot_ou_id);
        	    #clean unmanagment ip changed
	            my @all_changed = get_records_sql($hdb,"SELECT id, ip FROM User_auth WHERE changed = 1 OR dhcp_changed = 1");
        	    foreach my $row(@all_changed) {
	        	    next if ($office_networks->match_string($row->{ip}));
		            do_sql($hdb,"UPDATE User_auth SET changed = 0, dhcp_changed = 0  WHERE id=".$row->{id});
		            }
                    #dhcp changed records
                    my $changed = get_record_sql($hdb,"SELECT COUNT(*) as c_count from User_auth WHERE dhcp_changed=1");
                    if ($changed->{"c_count"}>0) {
                	    do_sql($hdb,"UPDATE User_auth SET dhcp_changed=0");
                            log_info("Found changed dhcp variables in records: ".$changed->{'c_count'});
                            my $dhcp_exec=get_option($hdb,38);
	                    my %result=do_exec_ref('/usr/bin/sudo '.$dhcp_exec);
	                    if ($result{status} ne 0) { log_error("Error sync dhcp config"); }
                            }
                    #acl & dhcp changed records 
                    $changed = get_record_sql($hdb,"SELECT COUNT(*) as c_count from User_auth WHERE changed=1");
	            if ($changed->{"c_count"}>0) {
                            log_info("Found changed records: ".$changed->{'c_count'});
                            my $acl_exec=get_option($hdb,37);
                            my %result=do_exec_ref($acl_exec);
	                    if ($result{status} ne 0) { log_error("Error sync status at gateways"); }
		            }
	            }
            #dns changed records
            my @dns_changed = get_records_sql($hdb,"SELECT auth_id FROM `dns_queue` GROUP BY auth_id");
            if (@dns_changed and scalar @dns_changed) {
                    foreach my $auth (@dns_changed) {
                        update_dns_record($hdb,$auth->{auth_id});
                        log_info("Clear changed dns for auth id: ".$auth->{auth_id});
                        do_sql($hdb,"DELETE FROM `dns_queue` WHERE auth_id=".$auth->{auth_id});
                        }
	            }
            #clear temporary user auth records
            my $now = DateTime->now(time_zone=>'local');
            my $clear_time =$dbh->quote($now->strftime('%Y-%m-%d %H:%M:%S'));
            my $users_sql = "SELECT * FROM User_auth WHERE deleted=0 AND dynamic=1 AND `eof`<=".$clear_time;
            my @users_auth = get_records_sql($hdb,$users_sql);
            if (@users_auth and scalar @users_auth) {
                    foreach my $row (@users_auth) {
                        delete_user_auth($hdb,$row->{id});
                        db_log_info($hdb,"Removed dynamic user auth record for auth_id: $row->{'id'} by eof time: $row->{'eof'}",$row->{'id'});
                        my $u_count=get_count_records($hdb,'User_auth','deleted=0 and user_id='.$row->{user_id});
                        if (!$u_count) { delete_user($hdb,$row->{'user_id'}); }
                        }
                    }
            }
	sleep(10);
        };
        if ($@) { log_error("Exception found: $@"); sleep(300); }
        }
    } else {
        print "Already Running with pid $pid\n";
    }
}

sub usage {
    print "usage: stat-sync.pl (start|stop|restart)\n";
    exit(0);
}

sub reload {
    print "reload process not implemented.\n";
}

sub restart {
    stop;
    run;
}