package t::lib::Selenium;

# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Koha is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Koha; if not, see <http://www.gnu.org/licenses>.


use Modern::Perl;
use Carp qw( croak );

use C4::Context;

use base qw(Class::Accessor);
__PACKAGE__->mk_accessors(qw(login password base_url selenium_addr selenium_port driver));

sub new {
    my ( $class, $params ) = @_;
    my $self   = {};
    my $config = $class->config;
    $self->{login}    = $params->{login}    || $config->{login};
    $self->{password} = $params->{password} || $config->{password};
    $self->{base_url} = $params->{base_url} || $config->{base_url};
    $self->{selenium_addr} = $params->{selenium_addr} || $config->{selenium_addr};
    $self->{selenium_port} = $params->{selenium_port} || $config->{selenium_port};
    $self->{driver} = Selenium::Remote::Driver->new(
        port               => $self->{selenium_port},
        remote_server_addr => $self->{selenium_addr},
        error_handler => sub {
            my $selenium_error = $_[1];
            print STDERR "\nSTRACE:";
            my $i = 1;
            while ( (my @call_details = (caller($i++))) ){
                print STDERR "\t" . $call_details[1]. ":" . $call_details[2] . " in " . $call_details[3]."\n";
            }
            print STDERR "\n";
            croak $selenium_error; }
    );
    return bless $self, $class;
}

sub config {
    return {
        login    => $ENV{KOHA_USER} || 'koha',
        password => $ENV{KOHA_PASS} || 'koha',
        base_url => ( $ENV{KOHA_INTRANET_URL} || C4::Context->preference("staffClientBaseURL") ) . "/cgi-bin/koha/",
        selenium_addr => $ENV{SELENIUM_ADDR} || 'localhost',
        selenium_port => $ENV{SELENIUM_PORT} || 4444,
    };
}

sub auth {
    my ( $self, $login, $password ) = @_;

    $login ||= $self->login;
    $password ||= $self->password;
    my $mainpage = $self->base_url . 'mainpage.pl';

    $self->driver->get($mainpage);
    $self->fill_form( { userid => $login, password => $password } );
    my $login_button = $self->driver->find_element('//input[@id="submit"]');
    $login_button->submit();
}

sub fill_form {
    my ( $self, $values ) = @_;
    while ( my ( $id, $value ) = each %$values ) {
        my $element = $self->driver->find_element('//*[@id="'.$id.'"]');
        my $tag = $element->get_tag_name();
        if ( $tag eq 'input' ) {
            $self->driver->find_element('//input[@id="'.$id.'"]')->send_keys($value);
        } elsif ( $tag eq 'select' ) {
            $self->driver->find_element('//select[@id="'.$id.'"]/option[@value="'.$value.'"]')->click;
        }
    }
}

sub submit_form {
    my ( $self ) = @_;

    my $default_submit_selector = '//fieldset[@class="action"]/input[@type="submit"]';
    $self->click_when_visible( $default_submit_selector );
}

sub click {
    my ( $self, $params ) = @_;
    my $xpath_selector;
    if ( exists $params->{main} ) {
        $xpath_selector = '//div[@id="'.$params->{main}.'"]';
    }
    if ( exists $params->{href} ) {
        $xpath_selector .= '//a[contains(@href, "'.$params->{href}.'")]';
    }
    if ( exists $params->{id} ) {
        $xpath_selector .= '//*[@id="'.$params->{id}.'"]';
    }
    $self->click_when_visible( $xpath_selector );
}

sub click_when_visible {
    my ( $self, $xpath_selector ) = @_;
    $self->driver->set_implicit_wait_timeout(20000);
    my ($visible, $elt);
    while ( not $visible ) {
        $elt = $self->driver->find_element($xpath_selector);
        $visible = $elt->is_displayed;
        $self->driver->pause(1000) unless $visible;
    }
    $elt->click;
}

=head1 NAME

t::lib::Selenium - Selenium helper module

=head1 SYNOPSIS

    my $s = t::lib::Selenium->new;
    my $driver = $s->driver;
    my $base_url = $s->base_url;
    $s->auth;
    $driver->get($s->base_url . 'mainpage.pl');
    $s->fill_form({ input_id => 'value' });

=head1 DESCRIPTION

The goal of this module is to group the different actions we need
when we use automation test using Selenium
=head1 METHODS

=head2 new

    my $s = t::lib::Selenium->new;

    Constructor - Returns the object Selenium
    You can pass login, password, base_url, selenium_addr, selenium_port
    If not passed, the environment variables will be used
    KOHA_USER, KOHA_PASS, KOHA_INTRANET_URL, SELENIUM_ADDR SELENIUM_PORT
    Or koha, koha, syspref staffClientBaseURL, localhost, 4444

=head2 auth

    $s->auth;

    Will login into Koha.

=head2 fill_form

    $driver->get($url)
    $s->fill_form({
        input_id => 'value',
        element_id => 'other_value',
    });

    Will fill the different elements of a form.
    The keys must be element ids (input and select are supported so far)
    The values must a string.

=head2 submit_form

    $s->submit_form;

    It will submit the form using the submit button present in in the fieldset with a clas="action".
    It should be the default way. If it does not work you should certainly fix the Koha interface.

=head2 click

    $s->click

    This is a bit dirty for now but will evolve depending on the needs
    3 parameters possible but only the following 2 forms are used:
    $s->click({ href => '/module/script.pl?foo=bar', main => 'doc3' }); # Sometimes we have doc or doc3. To make sure we are not going to hit a link in the header
    $s->click({ id => 'element_id });

=head2 click_when_visible

    $c->click_when_visible

    Should always be called to avoid the "An element could not be located on the page" error

=head2


=head1 AUTHORS

Jonathan Druart <jonathan.druart@bugs.koha-community.org>

Alex Buckley <alexbuckley@catalyst.net.nz>

Koha Development Team

=head1 COPYRIGHT

Copyright 2017 - Koha Development Team

=head1 LICENSE

This file is part of Koha.

Koha is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

Koha is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Koha; if not, see <http://www.gnu.org/licenses>.

=cut

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