#!/usr/bin/perl -w
#
=head1 NAME

cb - CasparBuster looks at the structure in your CMS environment and deploy it to the target systems as needed

=head1 SYNOPSIS

cb [options]

 Options:
   --debug  |-d			debug mode
   --help   |-h			brief help message
   --man			full documentation
   --force   |-f			force copy of files, even if they exist
   --source |-s <file/dir>	directory or files to copy from the CasparBuster tree (',' separated if many) to the target
   --plugin |-p <plugin name>	plugin defining what to copy from the CasparBuster tree (',' separated if many) to the target
   --machine|-m <machine>	machine to deploy on.

=head1 OPTIONS

=over 4

=item B<--debug>

Enter debug mode. This will print what would be done. No commands are executed,
so this is safe to use when testing.

=item B<--help>

Print a brief help message and exits.

=item B<--man>

Prints the manual page and exits.

=item B<--machine> I<machine name>

Specify the machine to consider when dealing with the CasparBuster structure. 
The files will be pushed to this machine, and a subdirectory named after the machine 
will be used under the basedir to look at the directory structure to deploy

=item B<--source> I<path>

Specify the path of the source file or directory to deploy with CasparBuster. Multiple paths can be specified separated by ','.

=item B<--plugin> I<name>

Specify the name of the plugin to deploy with CasparBuster. Multiple plugins can be specified separated by ','.
A plugin defines a set of files (with their mode and owner), a set of directories (with their mode and owner) and a set of scripts to launch once the files are copied remotely.

=back

=head1 DESCRIPTION

Deploy the standard CasparBuster structure created by I<cbusterize>. It will reinstall all files and directory in the plugin, with correct owner, group and mode, and launch at the end the script to re-enable potentially the service using the updated files.

=head1 EXAMPLES

	# this will deploy the appropriate CasparBuster environment for DHCP
	# from the base ~/prj/musique-ancienne.org directory (Cf cbbasedir in cb.conf)
	# containing the directory victoria2 for this machine
	# to which it will copy the required files

	cb -m victoria2 -p dhcpd

=head1 AUTHOR

=over 4

Bruno Cornec, http://brunocornec.wordpress.com

=back

=head1 LICENSE

Copyright (C) 2012  Bruno Cornec <bruno@project-builder.org>
Released under the GPLv2 or the Artistic license at your will.

=cut
use strict;
use CasparBuster::Version;
use CasparBuster::Env;
use CasparBuster::Plugin;
#use Cwd 'realpath';
use File::Find;
use File::Copy;
use File::Basename;
use File::Path;
use File::Glob ':glob';
use Getopt::Long;
use Pod::Usage;
use Data::Dumper;
use List::Util qw(first);
use ProjectBuilder::Base;
use ProjectBuilder::Conf;
use ProjectBuilder::VCS;
use DBI;
use DBD::SQLite;

# settings
my $debug = 0;
my $help = undef;
my $man = undef;
my $source = undef;
my $machine = undef;
my $plugin = undef;
my $quiet = undef;
my $force = undef;
my $log = undef;
my $LOG = undef;

my ($cbver,$cbrev) = cb_version_init();
my $appname = "cb";
$ENV{'PBPROJ'} = $appname;
pb_temp_init();

# Initialize the syntax string
pb_syntax_init("$appname (aka CasparBuster) Version $cbver-$cbrev\n");

# parse command-line options
GetOptions(
	'machine|m=s' => \$machine,
	'debug|d+'    => \$debug,
	'help|h'      => \$help,
	'quiet|q'     => \$quiet,
	'force|f'     => \$force,
	'man'         => \$man,
	'logfile|l=s' => \$log,
	'source|s=s'  => \$source,
	'plugin|p=s'  => \$plugin,
) || pb_syntax(-1,0);

if (defined $help) {
	pb_syntax(0,1);
}
if (defined $man) {
	pb_syntax(0,2);
}
if (defined $quiet) {
	$debug=-1;
}
if (defined $log) {
	open(LOG,"> $log") || die "Unable to log to $log: $!";
	$LOG = \*LOG;
	$debug = 0  if ($debug == -1);
}

$pbdebug = $debug;
pb_log_init($debug, $LOG);
pb_log(0,"Starting cb\n");

# Get conf file in context
pb_conf_init($appname);
# The personal one if there is such
pb_conf_add("$ENV{'HOME'}/.cbrc") if (-f "$ENV{'HOME'}/.cbrc");
# The system one
pb_conf_add(cb_env_conffile());

# Get configuration parameters
my %cb;
my $cb = \%cb;
($cb->{'basedir'},$cb->{'usemachines'},$cb->{'cms'},$cb->{'database'}) = pb_conf_get("cbbasedir","cbusemachines","cbcms","cbdatabase");
pb_log(2,"%cb: ",Dumper($cb));

# Check for mandatory params

if (defined $plugin) {
	# Load plugins
	cb_plugin_load();
}

my $basedir = $cb->{'basedir'}->{$appname};
eval { $basedir =~ s/(\$ENV.+\})/$1/eeg };

pb_log(1, "DEBUG MODE, not doing anything, just printing\nDEBUG: basedir = $basedir\n");

# Use potentially a remote account if defined
my $account = undef;
my $remote = $machine;
($account) = pb_conf_get_if("cbaccount") if (defined $machine);
$remote = $account->{$machine}."@".$machine if ((defined $account) && (defined $account->{$machine}));
pb_log(1, "DEBUG: remote = $remote\n") if (defined $remote);

# Create basedir if it doesn't exist
die "Unable to find base directory at $basedir" if (not -d $basedir);

# Now handle plugins if any
my $cbp = ();

if (defined $plugin) {
	foreach my $p (split(/,/,$plugin)) {	
		pb_log(1,"Getting context for plugin $p\n");
		$cbp = cb_plugin_get($p,$cbp);
		pb_log(2,"cbp: ".Dumper($cbp)."\n");
	}
}

my $db = "$cb->{'basedir'}/$cb->{'database'}";

my $precmd = "";
if (! -f $db) {
	$precmd = "CREATE TABLE dates (id INTEGER PRIMARY KEY AUTOINCREMENT, date DATE, file VARCHAR[65535])";
}

my $dbh = DBI->connect("dbi:SQLite:dbname=$db","","",
			{ RaiseError => 1, AutoCommit => 1 })
			|| die "Unable to connect to $db";

if ($precmd ne "") {
	my $sth = $dbh->prepare(qq{$precmd}) || die "Unable to create table into $db";
	if ($debug) {
			pb_log(1,"DEBUG: Creatung DB $db\n");
			pb_log(1,"DEBUG: with command $precmd\n");
	} else {
		$sth->execute();
	}
}

my $dest = "$ENV{'TMPDIR'}/vcs.$$";
pb_vcs_export(,$cb->{'basedir'},$dest);

# Is the source a file or a dir ? Split the source parameter in 2
my $srcdir = undef;
my $srcfile = undef;
my $cmd = undef;

if (not defined $machine) {
	if (-d $source) {
		$srcdir = $source;
	} else {
		$srcdir = dirname($source);
		$srcfile = basename($source);
	}
} else {
	$cmd = "ssh -q $remote \'echo \"if [ -d $source ]; then exit 0; else exit -1; fi\" | sudo bash\'";
	my $res = pb_system($cmd,"","quiet");
	pb_log(2,"DEBUG: Found res = $res\n");
	if ($res == 0) {
		$srcdir = $source;
		pb_log(1,"DEBUG: Found remote dir = $source\n");
	} else {
		$srcdir = dirname($source);
		$srcfile = basename($source);
		pb_log(1,"DEBUG: Found remote file = $source\n");
	}
}

pb_log(1,"DEBUG: Found srcdir = $srcdir\n");
if (defined $srcfile) {
	pb_log(1,"DEBUG: Found srcfile = $srcfile\n");
} else {
	pb_log(1,"DEBUG: Found no srcfile\n");
}

# Deduce the target directory from the local structure and the source
my $target = $basedir;
$target .= "/$machine" if defined ($machine);
$target .= "$srcdir";

my $scheme = $cb->{'cms'}->{$appname};

# If both source and target are dirs, then copy into the parent of the target
$target = basename($target) if ((not defined $srcfile) && (-d $target));

# Create target if it doesn't exist when we have to copy a file
if ((not -d $target) && (defined $srcfile)) {
	if ($debug) {
		pb_log(1,"DEBUG: Creating recursively directory $target\n");
	} else {
		pb_mkdir_p($target) || die "Unable to recursively create $target: $!";
		pb_vcs_add($scheme,$target);
		pb_log(0,"INFO: Created $target and added it to your $scheme system\n");
	}
}

# We need to know where to get the content from
my $cmdopt = "";

# Recursive if we copy dirs
$cmdopt = "-r" if (not defined $srcfile);

if (defined $machine) {
	$cmd = "scp -p -q $cmdopt $remote:$source $target";
} else {
	$cmd = "cp -p $cmdopt $source $target";
}

# Now add content if not already there
if (defined $srcfile) {
	# File case
	if ((! -f "$target/$srcfile") || (defined $force)){
		if ($debug) {
			pb_log(1,"DEBUG: launching $cmd\n");
		} else {
			pb_system($cmd);
			pb_vcs_add($scheme,"$target/$srcfile");
			pb_log(0,"INFO: Created $target/$srcfile and added it to your $scheme system\n");
		}
	} else {
		pb_log(0,"INFO: File $target/$srcfile already there\n");
	}
} else {
	# Directory case
	if ($debug) {
		pb_log(1,"DEBUG: launching $cmd\n");
	} else {
		pb_system($cmd);
		pb_vcs_add($scheme,"$target");
		pb_log(0,"INFO: Created $target and added it to your $scheme system\n");
	}
}
pb_log(2,"Exiting cb_busterize\n");
}