#!/usr/bin/perl

# Important for switch feature
use v5.34;

use strict;
use warnings;

# CPAN packages
use Log::Log4perl;

# Package name
package F1DataBot;

# Constants and initalisations
Log::Log4perl->init('log.conf');
my $ERGAST_URL   = 'http://ergast.com/api/f1';
my $TELEGRAM_URL = 'https://api.telegram.org';
my $TOKEN        = 'bot5868933096:AAE8Oe-AxU6m_yCWfpqTqwwjERqnRpBGJtE';

sub greet {

	my %Param = @_;
	my $LogObject = Log::Log4perl->get_logger('F1DataBot');
	use Data::Dumper;

	$LogObject->info('greet: Initiating greet routine');

	if ( !defined $Param{Message} ) {
		$LogObject->error('greet: Message not defined!');
		return;
	}

	my @Greetings = qw(Hallo Gruezi Hello Holá Bonjour Konichiwa Shalom Godmorgen);
	my $Greet = $Greetings[ int(rand(7)) ] || '';
	$LogObject->debug('Random Greet is ' . $Greet);
	my $ReturnContent = $Greet . ', ' . ($Param{Message}->{chat}->{first_name} ? $Param{Message}->{chat}->{first_name} : $Param{Message}->{chat}->{username}) . '!';
	$LogObject->debug('ReturnContent is ' . $ReturnContent);
	return $ReturnContent;

}

sub statistics {

	my %Param = @_;
	my $LogObject = Log::Log4perl->get_logger('F1DataBot');
	use Data::Dumper;
	use LWP::Simple::REST qw(GET json);
	use XML::Parser;

	$LogObject->info('statistics: Initiating statistics routine');

	if ( !defined $Param{Message} ) {
		$LogObject->error('statistics: Message not defined!');
		return;
	}

	# Parse arguments
	# Expected format: driver | constructor | circuit
	# Circuit: [name] [statistics identifier] [individual parameters]
	$Param{Message}->{text} =~ /^(\/statistics)\s(?<statclass>driver|constructor|circuit)/;
	my $StatClass = $+{statclass};
	given ( $StatClass ) {

		when ( 'driver' ) {
			$LogObject->info('statistics: Recognizing driver command');
			$Param{Message}->{text} =~ /^(\/statistics)\s$StatClass\s(?<statidentifier>\w+)/;
			my $StatIdentifier = $+{statidentifier};
			given ( $StatIdentifier ) {
				when ( 'standings' ) {
					my $Standings = json POST ( join('/', ($ERGAST_URL, 'current', 'driverStandings.json')), {} );
					$LogObject->info('statistics: Fetched standings are ' . Dumper($Standings));
					my %DriverStandings;
					my $DriverStandingsFormatted = '';
					for my $Driver ( $Standings->{MRData}->{StandingsTable}->{StandingsLists}->[0]->{DriverStandings}->@* ) {
						$DriverStandingsFormatted .= "Position: $Driver->{positionText}, Name: $Driver->{Driver}->{code} - Points: $Driver->{points}\n";
					}
					return $DriverStandingsFormatted;
				}
				default {
					return "I'm sorry, " . ($Param{Message}->{chat}->{first_name} ? $Param{Message}->{chat}->{first_name} : $Param{Message}->{chat}->{username}) . ", I recognized you wanted to fetch a statistic about drivers, but I couldn't determine which one. Maybe you want to try again? Currently available are:\n\tstandings";
				}
			}
		}
		when ( 'constructor' ) {
			$LogObject->info('statistics: Recognizing constructor command');
		}
		when ( 'circuit' ) {
			$LogObject->info('statistics: Recognizing circuit command');
		}
		# Statistics class not recognized
		default {
			return "I'm sorry, " . ($Param{Message}->{chat}->{first_name} ? $Param{Message}->{chat}->{first_name} : $Param{Message}->{chat}->{username}) . ", I recognized you wanted to fetch a statistic, but I couldn't determine which one. Maybe you want to try again? Currently available are:\n\tdriver\n\tconstructor\n\tcircuit";
		}

	}
	
	# Use system to call the python script (big shame, but nothing to do about it)
	return '';

}

sub processMessage {

	my %Param     = @_;
	my $LogObject = Log::Log4perl->get_logger('F1DataBot');
	use Data::Dumper;
	use LWP::Simple::REST qw(POST plain);

	my %Commands = (
		'greet'      => \&greet,
		'statistics' => \&statistics,
	);

	if ( !defined $Param{Message} ) {
		$LogObject->error('processMessage: Message not defined!');
		return;
	}

	$LogObject->info('processMessage: Starting to process message');
	$LogObject->info('processMessage: Message is ' . Dumper($Param{Message}));

	my $Message = $Param{Message}->{message};

	my $ResponseContent;
	if ( $Message->{text} =~ /\/(?<command>greet|statistics)\s?(?<arguments>.*)?/ ) {
		my $Command         = $+{command};
		my $ArgumentsString = $+{arguments};
		$ResponseContent    = $Commands{$Command}(
			Message   => $Message,
			Arguments => $ArgumentsString,
		); 
	}
	else {
		$LogObject->debug('Command not recognized. Data: ' . $Message->{text});
		$ResponseContent = "I'm sorry, " . ($Message->{chat}->{first_name} ? $Message->{chat}->{first_name} : $Message->{chat}->{username}) . ", I couldn't understand your request. Currently I can process the commands:\n\n\t\/greet";
	}

 	my $ResponseResult = plain POST ( join('/', ($TELEGRAM_URL, $TOKEN, 'sendMessage')), {
 				chat_id => $Message->{chat}->{id},
 				text    => $ResponseContent,
 			} );
 	$LogObject->info('processMessage: Answering result is ' . Dumper($ResponseResult));
 
 	# mark message as read
 	my $SeenResult = plain POST ( join('/', ($TELEGRAM_URL, $TOKEN, 'readMessageContents')), {
 			id => $Message->{id},
 		} );

}

sub fetchMessages {

	my %Param = @_;
	my $LogObject = Log::Log4perl->get_logger('F1DataBot');
	use Data::Dumper;
	use LWP::Simple::REST qw(GET json);

	my $Method = 'getUpdates';
	$LogObject->info('fetchMessages: Initiating getUpdates');

	my $MessageDataRaw = json GET ( join('/', ($TELEGRAM_URL, $TOKEN, $Method)), {} );
	$LogObject->info('fetchMessages: Messages raw are ' . Dumper($MessageDataRaw));
	my @Messages = $MessageDataRaw->{result}->@*;
	$LogObject->info('fetchMessages: Messages returned are ' . Dumper(\@Messages));
	for my $Message ( @Messages ) {
		$LogObject->info('fetchMessages: Calling processMessage');
		processMessage(
			Message => $Message,
		);
	}

}

1;