#! /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) );

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 = '';

# 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
}


# returns 0 on success, so call with
# if ( my $return = &doCommand $command ) {
#    failure code
# } else {
#    success code
# }
# 
sub doCommand {
   my $command = shift;
   system $command;
   if ($? == -1) { # Could not even find the file?? Or not executable
       return -1;
   }
   elsif ($? & 127) { # major failure with, possibly, code dump
       return $? & 127;
   } else { # we had some kind of failure, just return the failure code
       return $? >> 8;
   }
   return 0;
}

################################################################
#               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; }

my $returnValue = 0;

# first, find operating system
my $command = $scriptDir . '/determineOS';
$os = `$command` unless $os;
&logIt( "Detected operating system is [$os]" );

die "Could not detect operation system\n" unless $os;
# now, verify we have all the libraries we need and install them if necessary
$command = $scriptDir . '/validateDependencies'
            . " -o $os" 
            . ( $quiet ? ' -q' : '' ) 
            . ( $DEBUG ? ' --debug' : '')
            . ( $dryRun ? ' -n' : '' );
&logIt( "Running command $command" );
if ( doCommand( $command ) ) {
   die "I had an error executing $command\n";
}
&logIt( "\tReturn value is $returnValue" );

$command = $scriptDir . '/checkFiles'
            . " -o $os" 
            . ( $quiet ? ' -q' : '' ) 
            . ( $DEBUG ? ' --debug' : '')
            . ( $dryRun ? ' -n' : '')
            . ( $seedFileName ? " -s $seedFileName " : '' );
&logIt( "Running command $command" );
if ( doCommand( $command ) ) {
   die "I had an error executing $command\n";
}
&logIt( "\tReturn value is $returnValue" );

# check permissions
$command = $scriptDir . '/permissions';
&logIt( "Running command $command" );
if ( doCommand( $command ) ) {
   die "I had an error executing $command\n";
}

# run configure
$command = $scriptDir . "/../configure"
            . ( $quiet ? ' -q' : '' ) 
            . ( $DEBUG ? ' --debug' : '')
            . ( $dryRun ? ' -n' : '' );
&logIt( "Running command $command" );
if ( doCommand( $command ) ) {
   die "I had an error executing $command\n";
}
&logIt( "\tReturn value is $returnValue" );