#! /usr/bin/perl -w

use strict;
use warnings;
use utf8;

## IMPORTANT ##
# When Net::Twitter::Lite encounters a Twitter API error or a network error, 
# it throws a Net::Twitter::Lite::Error object. 
# You can catch and process these exceptions by using eval blocks and testing $@
## from http://search.cpan.org/perldoc?Net::Twitter::Lite#ERROR_HANDLING
use Net::Twitter::Lite;
use FindBin qw($Bin);
use YAML::Tiny;

my $conf = loadconf("$Bin/config.yml");
if (! defined $conf) {
    die "$0: cannot parse config file.\n";
}

my $bot = login($conf);
if (! $bot->authorized) {
    die "$0: this client is not yet authorized.\n";
}


eval {
    foreach my $id (@ARGV) {
        my $res = $bot->show_status($id);
        use Data::Dumper;
        foreach my $line (split /\n/, Dumper $res) {
            if ($line =~ /undef/) { next; }
            unless ($line =~ / => {/
                ||  $line =~ / = /
                ||  $line =~ /status/
                ||  $line =~ /'text'/
                ||  $line =~ /created/
                ||  $line =~ /'id'/
                ||  $line =~ /name/
                ||  $line =~ / },/
                ||  $line =~ / };/
            ) { next; }
            print $line, "\n";
        }
    }
};
if ($@) {
    evalrescue($@);
}
print "done\n";


sub loadconf {
    # load configration data from yaml formatted file
    #   param   => scalar string of filename
    #   ret     => hash object of yaml data
    
    my $file = shift @_;
    
    my $yaml = YAML::Tiny->read($file);
    
    if ($!) {
        warn "$0: '$file' $!\n";
    }
    
    return $yaml->[0];
}

sub login {
    # make Net::Twitter::Lite object and login
    #   param   => hash object of configration
    #   ret     => Net::Twitter::Lite object
    
    my $conf = shift @_;
    
    my $bot = Net::Twitter::Lite->new(
        consumer_key    => $conf->{consumer_key},
        consumer_secret => $conf->{consumer_secret},
    );
    
    $bot->access_token($conf->{access_token});
    $bot->access_token_secret($conf->{access_token_secret});
    
    return $bot;
}

sub evalrescue {
    # output error message at eval error
    
    use Scalar::Util qw(blessed);
    
    if (blessed $@ && $@->isa('Net::Twitter::Lite::Error')) {
        warn $@->error;
        if ($@->twitter_error) {
            my %twitter_error = %{$@->twitter_error};
            map {
                $twitter_error{"$_ => "} = $twitter_error{$_} . "\n";
                delete $twitter_error{$_}
            } keys %twitter_error;
            warn join("", %twitter_error);
        }
    }
    else {
        warn $@;
    }
}