#!/usr/bin/perl

use strict;
use warnings;
use POSIX qw/strftime/;

my $outputfile = "/home/swflint/org/index.org";
my $date = strftime "<%Y-%m-%d %a %H:%M>", localtime;

my $fileHeader = <<EOF;
#+Title: Org File Index
#+AUTHOR: Sam Flint
#+EMAIL: swflint\@flintfam.org
#+DATE: $date
#+INFOJS_OPT: view:info toc:nil path:http://flintfam.org/org-info.js
#+OPTIONS: toc:nil H:5 ':t *:t d:nil stat:nil todo:nil
#+LATEX_CLASS_OPTIONS: [10pt,twocolumn]
#+LATEX_HEADER: \\usepackage[landscape,margin=0.125 in]{geometry}
#+LATEX_HEADER: \\pagestyle{empty}

* Org

EOF

open(my $output, ">", $outputfile) or die "Unable to open \"$outputfile\" the output file, $!";

print $output $fileHeader;

opendir(my $directory, "/home/swflint/org/")
    or die "Can't open the directory: $!";

my @directories;

while (my $file = readdir $directory) {
    if ($file =~ m/^\..*/) {
        next;
    } elsif (-d "/home/swflint/org/$file") {
        push @directories, $file;
    } elsif ($file =~ m/.*\.org$/) {
        (my $linkName = $file) =~ s/\.[^.]+$//;
        $linkName =~ s/-/ /g;
        $linkName =~ s/\b(\w)/\U$1/g;
        print $output " - [[file:~/org/$file][$linkName]]\n"
    } else {
        next;
    }
}

closedir $directory;

foreach (sort @directories) {
    my $newDir = $_;
    if ($newDir =~ "auto" or $newDir =~ "data") {
        next;
    }
    opendir(my $theDirectory, "/home/swflint/org/$newDir/")
        or die "Can't open directory: $!";
    my $fancyDir = $newDir;
    $fancyDir =~ s/-/ /g;
    $fancyDir =~ s/\b(\w)/\U$1/g;
    print $output "\n** Org: $fancyDir\n\n";
    print $output " - [[file:~/org/$newDir/][$fancyDir]]\n";
    while (my $file = readdir $theDirectory) {
        if ($file =~ m/^\..*/
            or -d "/home/swflint/org/$newDir/$file") {
            next;
        } elsif ($file =~ m/.*\.org$/) {
            (my $linkName = $file) =~ s/\.[^.]+$//;
            $linkName =~ s/-/ /g;
            $linkName =~ s/\b(\w)/\U$1/g;
            print $output " - [[file:~/org/$newDir/$file][$linkName]]\n";
        } else {
            next;
        }
    }
}

close $output;