package Plugins::YouTubeMusic::OAuth2;

use strict;

use Slim::Utils::Log;
use Slim::Utils::Cache;
use Slim::Utils::Strings qw(string cstring);
use JSON::XS::VersionOneAndTwo;
use Data::Dumper;

use constant CLIENT_ID => "861556708454-d6dlm3lh05idd8npek18k6be8ba3oc68.apps.googleusercontent.com";
use constant CLIENT_SECRET => "SboVhoG9s0rNafixCSGGKXAT";

my $log   = logger('plugin.youtubemusic');
my $cache = Slim::Utils::Cache->new();

sub getDeviceCode {
	my $post = "client_id=" . CLIENT_ID . "&scope=https://www.googleapis.com/auth/youtube";
	
	my $http = Slim::Networking::SimpleAsyncHTTP->new(
		sub {
			my $response = shift;
			my $result = eval { from_json($response->content) };

			if ($@) {
				$log->error(Data::Dump::dump($response)) unless main::DEBUGLOG && $log->is_debug;
				$log->error($@);
			} else {
				$cache->set("yt:device_code", $result->{device_code}, $result->{expires_in});
				$cache->set("yt:verification_url", $result->{verification_url}, $result->{expires_in});
				$cache->set("yt:user_code", $result->{user_code}, $result->{expires_in});

				$log->debug("content:", $response->content);
			}
		},
		sub { 
			$log->error($_[1]);
		},
		{
			timeout => 15,
		}
	);
	
	$http->post(
		"https://www.youtube.com/o/oauth2/device/code",
		'Content-Type' => 'application/x-www-form-urlencoded',
		$post,
	);
}

sub getToken {
	my $cb = shift;
	my @params = @_;
	my $post = "client_id=" . CLIENT_ID . "&client_secret=" . CLIENT_SECRET;
	my $code = $cache->get('yt:device_code');
	
	if (defined $code) {
		$post .= "&code=$code&grant_type=http://oauth.net/grant_type/device/1.0";
	} else {
		$post .= "&refresh_token=" . $cache->get('yt:refresh_token') . "&grant_type=refresh_token";
	}
	
	my $http = Slim::Networking::SimpleAsyncHTTP->new(
		sub {
			my $response = shift;
			my $result = eval { from_json($response->content) };

			if ($@) {
				$log->error(Data::Dump::dump($response)) unless main::DEBUGLOG && $log->is_debug;
				$log->error($@);
			} else {
				$cache->set("yt:access_token", $result->{access_token}, $result->{expires_in} - 60);
				$cache->set('yt:refresh_token', $result->{refresh_token}) if $result->{refresh_token};
				
				$cache->remove('yt:user_code');
				$cache->remove('yt:verification_url');
				$cache->remove('yt:device_code');
			
				$log->debug("content:", $response->content);

				$cb->(@params) if $cb;
			}
		},
		sub {
			$log->error($_[1]);
			$cb->(@params) if $cb;
		},
		{
			timeout => 15,
		}
	);
	
	$http->post(
		"https://oauth2.googleapis.com/token",
		'Content-Type' => 'application/x-www-form-urlencoded',
		$post,
	);
}

1;