package Moose::Exception::OverloadConflictInSummation;
our $VERSION = '2.2015';

use Moose;
extends 'Moose::Exception';

use Moose::Util 'find_meta';

has 'role_application' => (
    is       => 'ro',
    isa      => 'Moose::Meta::Role::Application::RoleSummation',
    required => 1
);

has 'role_names' => (
    traits  => ['Array'],
    is      => 'bare',
    isa     => 'ArrayRef[Str]',
    handles => {
        role_names => 'elements',
    },
    required => 1,
    documentation =>
        "This attribute is an ArrayRef containing role names, if you want metaobjects\n"
        . "associated with these role names, then call method roles on the exception object.\n",
);

has 'overloaded_op' => (
    is       => 'ro',
    isa      => 'Str',
    required => 1,
);

sub roles {
    my $self = shift;
    my @role_names = $self->role_names;
    my @roles = map { find_meta($_) } @role_names;
    return @roles;
}

sub _build_message {
    my $self = shift;

    my @roles = $self->role_names;
    my $role_names = join "|", @roles;

    my $op = $self->overloaded_op;
    if ( $op eq 'fallback' ) {
        return
              'We have encountered an overloading conflict for the fallback '
            . 'during composition. This is a fatal error.';
    }
    else {
        return
              "Role '$role_names' has encountered an overloading conflict "
            . "during composition. The two roles both overload the '$op' operator. "
            . 'This is a fatal error.';
    }
}

__PACKAGE__->meta->make_immutable;
1;
