#!/usr/bin/env perl
use LWP::Simple;
use JSON;
use utf8;
use warnings;

my $screen_width = 92;

sub print_list {
    my @lines = @_;

    my $column_w = 0;

    map { 
        $column_w = length($_->[0]) if length($_->[0]) > $column_w ; 
    } @lines;

    for my $arg ( @lines ) {
        my $title = shift @$arg;

        my $padding = int($column_w) - length( $title );

        if ( ! $ENV{NO_WRAP} && ( $column_w + 3 + length( join " ",@$arg) ) > $screen_width ) {
            # wrap description
            my $string = $title . " " x $padding . " - " . join(" ",@$arg) . "\n";
            $string =~ s/\n//g;

            my $cnt = 0;
            my $firstline = 1;
            my $tab = 4;
            my $wrapped = 0;
            while( $string =~ /(.)/g ) {
                $cnt++;

                my $c = $1;
                print $c;

                if( $c =~ /[ \,]/ && $firstline && $cnt > $screen_width ) {
                    print "\n" . " " x ($column_w + 3 + $tab );
                    $firstline = 0;
                    $cnt = 0;
                    $wrapped = 1;
                }
                elsif( $c =~ /[ \,]/ && ! $firstline && $cnt > ($screen_width - $column_w) ) {
                    print "\n" . " " x ($column_w + 3 + $tab );
                    $cnt = 0;
                    $wrapped = 1;
                }
            }
            print "\n";
            print "\n" if $wrapped;
        }
        else {
            print $title;
            print " " x $padding;
            print " - ";
            print join " " , @$arg;
            print "\n";
        }

    }

}

sub get_github_auth {
    open FH , "<" , $ENV{HOME} . "/.gitconfig";
    local $/;
    my $content = <FH>;
    close FH;
    my @parts = split /(?=\[.*?\])/,$content;
    for my $part ( @parts ) {
        if( $part =~ /^\[github\]/ ) {
            my ($user) = ($part =~ m/user\s*=\s*(\w+)/ );
            my ($token) = ($part =~ m/token\s*=\s*(\w+)/ );
            return {
                user => $user,
                token => $token
            };
        }
    }
}

my $act = shift;

$SIG{INT} = sub {
    exit;
};

if( ! $act || $act eq 'help' ) 
{

    print <<'END';

App::gh

show help message;

    $ gh help

* list:

    list all repository of c9s:

        $ gh list c9s

    if you dont want text wrapped:

        $ NO_WRAP=1 gh list c9s

* clone:

    clone Plack repository from miyagawa:

        $ gh clone miyagawa/Plack   # default: read-only 

    or:

        $ gh clone miyagawa Plack

        $ gh clone gugod Social http

        $ gh clone clkao Web-Hippie ro

    clone from read-only uri:

        $ gh clone miyagawa/Plack ro 

    clone from ssh uri:

        $ gh clone miyagawa/Plack ssh  

* search:

    search repository:

        $ gh search Plack

* cloneall:

    to clone all repository of miyagawa:

        $ gh cloneall miyagawa 

        $ gh cloneall clkao ro  # read-only

* fork;

    to fork project

        $ gh fork clkao AnyMQ

END
    exit;

}
elsif( $act eq 'search' || $act eq 's' ) {
    my $keyword = shift;
    my $json = get 'http://github.com/api/v2/json/repos/search/' . $keyword;

    my $result = decode_json( $json );

    my @ary = ();
    for my $repo ( @{ $result->{repositories} } ) {
        my $name = sprintf "%s/%s", $repo->{username} , $repo->{name};
        my $desc = $repo->{description};
        push @ary, [ $name , $desc ];
    }

    print_list @ary;
}
elsif( $act eq 'clone' || $act eq 'c' ) {
    my $user;
    my $repo;

    $user = shift;
    if( $user =~ /\// ) {
        ($user,$repo) = split /\//,$user;
    }
    else {
        $repo = shift;
    }

    my $attr = shift || 'ro';
    my $uri;
    if( $attr eq 'ro' ) {
        $uri = sprintf "git://github.com/%s/%s.git" , $user , $repo;
    }
    elsif( $attr eq 'ssh' ) {
        $uri = sprintf "git\@github.com:%s/%s.git" , $user , $repo;
    }
    print $uri . "\n";
    system( qq{git clone $uri} );
}
elsif( $act eq 'list' ) 
{
    my $acc = shift;
    my $json = get 'http://github.com/api/v2/json/repos/show/' . $acc;
    my $data = decode_json( $json );
    my @lines = ();
    for my $repo ( @{ $data->{repositories} } ) {
        my $repo_name = $repo->{name};
        push @lines , [  
            $acc . "/" . $repo->{name} ,
            ($repo->{description}||"")
        ];
    }
    print_list @lines;
}
elsif( $act eq 'cloneall' || $act eq 'ca' ) {
    my $acc = shift;
    my $attr = shift || 'ro';

    my $json = get 'http://github.com/api/v2/json/repos/show/' . $acc;
    my $data = decode_json( $json );

    for my $repo ( @{ $data->{repositories} } ) {
        my $repo_name = $repo->{name};
        my $local_repo_name = $repo_name;
        $local_repo_name =~ s/\.git$//;

        my $uri;
        if( $attr eq 'ro' ) {
            $uri = sprintf "git://github.com/%s/%s.git" , $acc , $repo_name;
        }
        elsif( $attr eq 'ssh' ) {
            $uri = sprintf "git\@github.com:%s/%s.git" , $acc , $repo_name;
        }
        print $uri . "\n";

        if( -e $local_repo_name ) {
            print "Updating " . $local_repo_name . " ...\n";
            qx{ cd $local_repo_name ; git pull origin master };
        }
        else {
            print "Cloning " . $repo->{name} . " ...\n";
            qx{ git clone -q $uri };
        }
    }
}
elsif( $act eq 'fork' ) {
    my $user;
    my $repo;

    $user = shift;
    if( $user =~ /\// ) {
        ($user,$repo) = split /\//,$user;
    }
    else {
        $repo = shift;
    }

    my $auth = get_github_auth();

    # curl -F 'login=schacon' -F 'token=XXX' http://github.com/api/v2/yaml/repos/fork/dim/retrospectiva

=pod

$VAR1 = {
          'repository' => {
                            'has_downloads' => bless( do{\(my $o = 1)}, 'JSON::XS::Boolean' ),
                            'owner' => 'c9s',
                            'has_issues' => bless( do{\(my $o = 0)}, 'JSON::XS::Boolean' ),
                            'name' => 'AnyMQ',
                            'private' => $VAR1->{'repository'}{'has_issues'},
                            'has_wiki' => $VAR1->{'repository'}{'has_downloads'},
                            'pushed_at' => '2010/04/06 00:40:45 -0700',
                            'description' => 'Simple message queue based on AnyEvent',
                            'watchers' => 1,
                            'forks' => 0,
                            'homepage' => '',
                            'created_at' => '2010/07/21 06:08:11 -0700',
                            'fork' => $VAR1->{'repository'}{'has_downloads'},
                            'url' => 'http://github.com/c9s/AnyMQ',
                            'open_issues' => 0
                          }
        };
=cut

    my $uri = sprintf("http://github.com/api/v2/json/repos/fork/%s/%s?login=%s&token=%s", $user , $repo , $auth->{user} , $auth->{token} );
    my $json = get( $uri );
    my $data = decode_json( $json );
    # use Data::Dumper; warn Dumper( $data );

    $data = $data->{repository};
    print "Name:       " . $data->{name} . "\n";
    print "Owner:      " . $data->{owner} . "\n";
    print "Watchers:   " . $data->{watchers} . "\n";
    print "Created at: " . $data->{created_at} . "\n";
    print "Pushed at:  " . $data->{pushed_at} . "\n";
    print "Fork:       " . $data->{'fork'} . "\n";
    print "URL:        " . $data->{url} . "\n";
    print "Homepage:   " . $data->{homepage} . "\n";
}
