package HTTP::Cookies;

use strict;
use HTTP::Date qw(str2time time2str);
use HTTP::Headers::Util qw(_split_header_words join_header_words);
use LWP::Debug ();

use vars qw($VERSION $EPOCH_OFFSET);
$VERSION = "5.817";

# Legacy: because "use "HTTP::Cookies" used be the ONLY way
#  to load the class HTTP::Cookies::Netscape.
require HTTP::Cookies::Netscape;

$EPOCH_OFFSET = 0;  # difference from Unix epoch
if ($^O eq "MacOS") {
    require Time::Local;
    $EPOCH_OFFSET = Time::Local::timelocal(0,0,0,1,0,70);
}

# A HTTP::Cookies object is a hash.  The main attribute is the
# COOKIES 3 level hash:  $self->{COOKIES}{$domain}{$path}{$key}.

sub new
{
    my $class = shift;
    my $self = bless {
	COOKIES => {},
    }, $class;
    my %cnf = @_;
    for (keys %cnf) {
	$self->{lc($_)} = $cnf{$_};
    }
    $self->load;
    $self;
}


sub add_cookie_header
{
    my $self = shift;
    my $request = shift || return;
    my $url = $request->url;
    my $scheme = $url->scheme;
    unless ($scheme =~ /^https?\z/) {
	LWP::Debug::debug("Will not add cookies to non-HTTP requests");
	return;
    }

    my $domain = _host($request, $url);
    $domain = "$domain.local" unless $domain =~ /\./;
    my $secure_request = ($scheme eq "https");
    my $req_path = _url_path($url);
    my $req_port = $url->port;
    my $now = time();
    _normalize_path($req_path) if $req_path =~ /%/;

    my @cval;    # cookie values for the "Cookie" header
    my $set_ver;
    my $netscape_only = 0; # An exact domain match applies to any cookie

    while ($domain =~ /\./) {

        LWP::Debug::debug("Checking $domain for cookies");
	my $cookies = $self->{COOKIES}{$domain};
	next unless $cookies;
	if ($self->{delayload} && defined($cookies->{'//+delayload'})) {
	    my $cookie_data = $cookies->{'//+delayload'}{'cookie'};
	    delete $self->{COOKIES}{$domain};
	    $self->load_cookie($cookie_data->[1]);
	    $cookies = $self->{COOKIES}{$domain};
	    next unless $cookies;  # should not really happen
	}

	# Want to add cookies corresponding to the most specific paths
	# first (i.e. longest path first)
	my $path;
	for $path (sort {length($b) <=> length($a) } keys %$cookies) {
            LWP::Debug::debug("- checking cookie path=$path");
	    if (index($req_path, $path) != 0) {
	        LWP::Debug::debug("  path $path:$req_path does not fit");
		next;
	    }

	    my($key,$array);
	    while (($key,$array) = each %{$cookies->{$path}}) {
		my($version,$val,$port,$path_spec,$secure,$expires) = @$array;
	        LWP::Debug::debug(" - checking cookie $key=$val");
		if ($secure && !$secure_request) {
		    LWP::Debug::debug("   not a secure requests");
		    next;
		}
		if ($expires && $expires < $now) {
		    LWP::Debug::debug("   expired");
		    next;
		}
		if ($port) {
		    my $found;
		    if ($port =~ s/^_//) {
			# The correponding Set-Cookie attribute was empty