#! /usr/bin/env perl

use strict;
use warnings;

# find our location and use it for searching for libraries
BEGIN {
   use FindBin;
   use File::Spec;
   # use libraries from the directory this script is in
   use lib File::Spec->catdir($FindBin::Bin);
   # and its parent
   use lib File::Spec->catdir( $FindBin::Bin . '/../' );
   eval( 'use YAML::Tiny' );
}

use Cwd qw(abs_path);
use sysinfosetup;

my $scriptDir = abs_path(File::Spec->catdir($FindBin::Bin) );
my $binDir = abs_path("$scriptDir/../");
use Digest::MD5 qw(md5_hex);
use File::Copy;

# define the version number
# see https://metacpan.org/pod/release/JPEACOCK/version-0.97/lib/version.pod
use version;
our $VERSION = version->declare("v0.001.001");


use Data::Dumper;
use File::Basename;
use Getopt::Long;

Getopt::Long::Configure ("bundling"); # allow -vd --os='debian'
our $dryRun;
our $DEBUG;
my $os;
my $help = 0;
my $version = 0;
my $quiet = 0;
my $seedFileName = '';

our %operatingSystems;

# simple display if --help is passed
sub help {
   use File::Basename;
   print basename($0) . " $VERSION\n";
   print <<END
$0 [options]
Options:
   --os|-o      - lower case name of operating system (debian, freebsd, etc...)
   --dryrun|-n  - do not actually do anything, just tell you what I'd do
   --version|-v - display version and exit
   --quiet|-q   - Do not ask questions, just do stuff
   --help|-g    - Show this screen
   --seed|-s    - URL/Path to seed file for config
   --debug      - Show extra information (--nodebug is default)
END
}


################################################################
#               Main Code                                      #
################################################################

# handle any command line parameters that may have been passed in

GetOptions (
            "os|o=s"      => \$os,      # pass in the operating system
            "dryrun|n"    => \$dryRun,  # do NOT actually do anything
            "seed|s=s"    => \$seedFileName,
            'help|h'      => \$help,
            'version|v'   => \$version,
            'quiet|q'     => \$quiet,
            'debug!'      => \$DEBUG
            ) or die "Error parsing command line\n";
                  
if ( $help ) { &help() ; exit; }
if ( $version ) { use File::Basename; print basename($0) . " $VERSION\n"; exit; }


# find OS if they did not tell us what it was
$os = `$scriptDir/determineOS` unless $os;
print "Installing Conf and Cron for $os\n" unless $quiet;

my $returnValue = 0;
my $command;

# load the definitions from installer_config.pl
do "$scriptDir/installer_config.pl";

our %libraries;
our %install;
our %binaries;

if ( $seedFileName =~ m~^(((http)|(ftp))s?://).+$~ ) { # the seed file is a URL
   $command = "wget -O /tmp/seedfile --no-check-certificate $seedFileName";
   print "Downloading from $seedFileName\n\t$command\n" unless $quiet;
   `$command` unless $dryRun;
   $seedFileName = '/tmp/seedfile';
}

# Check for configuration file
my $configDir = $operatingSystems{ $os }{'confdir'};
unless ( -d $configDir ) {
   $command = "mkdir -p $configDir";
   print "Creating $configDir\n\t$command\n" unless $quiet;
   `$command` unless $dryRun;
}

my $configFile = $operatingSystems{'configuration file'};
$configFile =~ s/<confdir>/$configDir/;
unless ( -f $configFile ) {
   $seedFileName = "$scriptDir/sysinfo-client.conf.template.yaml" unless $seedFileName;
   $command = "cp $seedFileName $configFile";
   print "Creating $configFile\n\t$command\n" unless $quiet;
   `cp $seedFileName $configFile` unless $dryRun;
}

# check for cron file(s)
if ( defined( $operatingSystems{$os}{'crontab'} ) ) {
   my $command = $operatingSystems{$os}{'crontab'};
   $command =~ s/<bindir>/$binDir/;
   $command =~ s/<scriptdir>/$scriptDir/g;
   print "Setting up cron\n\t$command\n" unless $quiet;
   `$command` unless $dryRun;
}