#!/usr/bin/perl
use strict;
use warnings;

use WWW::Mechanize;
use Data::Dumper;
use HTML::TableExtract;
use HTML::TreeBuilder::XPath;
use UTF8;

# initialize
my $cols;
my $url;
my $depth;
my $count;
my $data;
my $ship;
my @position;
my @name;
my $callsign;

# get the data from the web.  Typically this is:
# http://www.sailwx.info/shiptrack/cruiseships.phtml
# Either pass this in as --url <page_url> when invoking or just set it.

$cols = 'Ship,last reported (UTC),position,Callsign';
$url = "http://www.sailwx.info/shiptrack/cruiseships.phtml";

my $input;

my $out_fn = 'C:\\Program Files\\cron\\Cruise Ships\\ship_data.csv';
open(my $out_fh, '>', $out_fn) or die("Unable to create output file \"$out_fn\": $!\n");

my $m = WWW::Mechanize->new();
$m->get($url);
$input = $m->content;

my $te;
if ( defined ($cols))
{
    my @headers = split(/,/, $cols);
    
    $te = HTML::TableExtract->new( attribs => { border => 1 } );
    $te = HTML::TableExtract->new(
                                headers => [qw( Ship position last Callsign )]
                                ) or die qq{$!};
}
else
{
    $te = new HTML::TableExtract( depth => $depth, count=>$count);
};
$te->parse($input);
foreach my $ship ($te->rows) {
    
    # extract name from row data using XPath
    my $tree = HTML::TreeBuilder::XPath->new_from_content($te);
    my @name = $tree->findvalues('//shipposition');

    print $name[0], "\n";
    
    # extract position from row data using XPath
    my @position = $tree->findvalues('//shiplocations');
    print @position;
    
    
    #    my $re = qr/([NS]?)\s*(\d+)(?:\D*)(\d*).*?,\s*([EW]?)\s*(\d+)(?:\D*)(\d*)/;
    #    unless ($position =~ /$re/) {
    #        die "unable to parse position\n";
    #            }
    #    my $lat = $2 + $3/60;
    #    my $long = $5 + $6/60;
    
    #   if ($1 eq 'S') { $lat = -$lat; }
    #   if ($4 eq 'W') { $long = -$long; }
    #   return sprintf("%.2f,%.2f", $lat, $long);
    
    #    $time       = $ { $ship }[2];
    #    $callsign   = $ { $ship }[3];
    #    print "positions: $position \n";
    }