#!/usr/bin/perl

use strict;
use FindBin qw($Bin);
use lib "$Bin/../lib";

use Cwd;
use Getopt::Long;
use File::Spec::Functions qw(splitdir catfile);

use App::Followme;
use App::Followme::Initialize qw(initialize);

my ($init, $help, $guide);
GetOptions('init|i' => \$init, 
           'help|h' => \$help,
           'guide|g' =>\$guide);

my $filename = shift @ARGV;
my $config = configuration_file();
my $quick_update = set_quick_update($filename);
my $directory = set_directory($filename);

if ($help) {
    show_help();

} elsif ($guide) {
    my $page = App::Followme::Guide->new()->print();
    print $page;

} elsif ($init) {
    initialize($directory);

} else {
    my $app = App::Followme->new(configuration_file => $config,
                                 quick_update => $quick_update);
    $app->run($directory);
}

#----------------------------------------------------------------------
# Construct configuration file name

sub configuration_file {
    my @path = splitdir($0);
    my $basename = pop(@path);
    $basename .= '.cfg';

    return $basename;
}

#----------------------------------------------------------------------
# Change directory to filename or directory containing filename if passed

sub set_directory {
    my ($filename) = @_;

    my $directory;
    if (defined $filename) {
        if (-d $filename) {
            $directory = $filename;

        } else {
            my @path = splitdir($filename);
            pop(@path);
            $directory = catfile(@path) if @path;
        }
    }

    $directory = getcwd();

    die "Could not set directory: $!\n" unless $directory;
    die "Could not change directory: $directory\n" unless chdir($directory);

    return $directory;
}

#----------------------------------------------------------------------
# Set quick update mode

sub set_quick_update {
    my ($filename) = @_;

    my $quick_update = defined $filename && ! -d $filename;
    return $quick_update;
}

#----------------------------------------------------------------------
# Print the help file

sub show_help {
    print <<'EOQ';

Usage: followme [file or directory]

Update a static website after changes. Constant portions of each page are
updated to match, text files are converted to html, and indexes are created
for new files in the archive.

The script is run on the directory or file passed as its argument. If no
argument is given, it is run on the current directory.

If a file is passed, the script is run on the directory the file is in. In
addition, the script is run in quick mode, meaning that only the directory
the file is in is checked for changes. Otherwise not only that directory, but
all directories below it are checked.

Options:

-h --help    print this help
-g --guide   print the guide, a fuller explanation of the task
-i --init    copy default templates and configurations to directory

EOQ
    return;
}

__END__

=encoding utf-8

=head1 NAME

followme - Simple static website creation and maintenance

=head1 SYNOPSIS

followme [file or directory]

=head1 DESCRIPTION

Updates a static website after changes. Constant portions of each page are
updated to match, text files are converted to html, and indexes are created
for files in the archive.

The script is run on the directory or file passed as its argument. If no
argument is given, it is run on the current directory.

If a file is passed, the script is run on the directory the file is in. In
addition, the script is run in quick mode, meaning that only the directory
the file is in is checked for changes. Otherwise not only that directory, but
all directories below it are checked.

head1 LICENSE

Copyright (C) Bernie Simon.

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.

=head1 AUTHOR

Bernie Simon E<lt>bernie.simon@gmail.comE<gt>

=cut