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package Piny::Repo;

use Moose;

use Piny::User;

# Attributes

has 'name' =>
  ( is        => 'rw'
  , isa       => 'Str'
  , trigger   => \&_rename_repo
  , required  => 1
  );

has 'path' =>
  ( is          => 'ro'
  , isa         => 'Str'
  , lazy_build  => 1
  , init_arg    => undef
  );

has 'description' =>
  ( is          => 'rw'
  , isa         => 'Str'
  , trigger     => \&_set_description
  , lazy_build  => 1
  , init_arg    => undef
  );

has 'repostat' =>
  ( is          => 'ro'
  , isa         => 'ArrayRef'
  , lazy_build  => 1
  , init_arg    => undef
  );

has 'owner' =>
  ( is          => 'ro'
  , isa         => 'Piny::User'
  , lazy_build  => 1
  , init_arg    => undef
  );

has 'globally_readable' =>
  ( is          => 'ro'
  , isa         => 'Bool'
  , lazy_build  => 1
  , init_arg    => undef
  );

has 'globally_writable' =>
  ( is          => 'ro'
  , isa         => 'Bool'
  , lazy_build  => 1
  , init_arg    => undef
  );

# Triggers

sub _rename_repo {
  my ( $s, $new_name, $old_name ) = @_;

  return unless defined $old_name;

  my $olddir = "/srv/git/$old_name.git";
  my $newdir = "/srv/git/$new_name.git";

  rename( $olddir, $newdir ) or die "Couldn't rename $olddir to $newdir: $!\n";

  $s->clear_path( );
};

sub _set_description {
  my ( $s, $new_description, $old_description ) = @_;

  return unless defined $old_description;

  open( my $fd, ">", $s->path( ) . "/description" ) or die "Unable to open " . $s->path( ) . "/description for writing: $!\n";
  print $fd $new_description;
  close( $fd ) or die "Error when closing " . $s->path( ) . "/description: $!\n";
};

# Builder methods

# If constructed with just one argument, then treat it as a repo name.
around BUILDARGS => sub {
  my ( $orig, $class ) = ( shift, shift );

  if ( @_ == 1 && ! ref $_[0] ) {
    return $class->$orig( name => $_[0] );
  } else {
    return $class->$orig( @_ );
  };
};

sub _build_path {
  my ( $s ) = @_;

  my $dir = "/srv/git/" . $s->name( ) . ".git";

  if ( -d $dir ) {
    return $dir;
  } else {
    die "Expected repo $dir does not exist!\n";
  };
};

sub _build_description {
  my ( $s ) = @_;

  open( my $d, "<", $s->path( ) . "/description" ) or die "Unable to open " . $s->path( ) . "/description: $!\n";
  my $desc;
  {
    local $/ = undef;
    $desc = <$d>;
  };
  close( $d );

  return $desc;
};

sub _build_repostat {
  my ( $s ) = @_;

  my @res = stat( $s->path( ) );
  die "stat( " . $s->path( ) . " ) failed: $!\n" unless @res;
  return \@res;
};

sub _build_owner {
  my ( $s ) = @_;

  my ( $uid ) = $s->repostat( )->[4];

  return Piny::User->new( uid => $uid );
};

sub _build_globally_readable {
  my ( $s ) = @_;

  return ( $s->repostat( )->[2] & 0444 ) == 0444;
};

sub _build_globally_writable {
  my ( $s ) = @_;

  return ( $s->repostat( )->[2] & 0111 ) == 0111;
};

# Moose boilerplate

__PACKAGE__->meta->make_immutable;

1;