package Slic3r::GUI::OptionsGroup;
use Moo;

use List::Util qw(first);
use Wx qw(:combobox :font :misc :sizer :systemsettings :textctrl);
use Wx::Event qw(EVT_CHECKBOX EVT_COMBOBOX EVT_SPINCTRL EVT_TEXT);

=head1 NAME

Slic3r::GUI::OptionsGroup - pre-filled Wx::StaticBoxSizer wrapper containing one or more options

=head1 SYNOPSIS

    my $optgroup = Slic3r::GUI::OptionsGroup->new(
        parent  => $self->parent,
        title   => 'Layers',
        options => [
            {
                opt_key     => 'layer_height',  # mandatory
                type        => 'f',             # mandatory
                label       => 'Layer height',
                tooltip     => 'This setting controls the height (and thus the total number) of the slices/layers.',
                sidetext    => 'mm',
                width       => 200,
                full_width  => 0,
                height      => 50,
                min         => 0,
                max         => 100,
                labels      => [],
                values      => [],
                default     => 0.4,             # mandatory
                readonly    => 0,
                on_change   => sub { print "new value is $_[0]\n" },
            },
        ],
        on_change   => sub { print "new value for $_[0] is $_[1]\n" },
        no_labels   => 0,
        label_width => 180,
    );
    $sizer->Add($optgroup->sizer);

=cut

has 'parent'        => (is => 'ro', required => 1);
has 'title'         => (is => 'ro', required => 1);
has 'options'       => (is => 'ro', required => 1, trigger => 1);
has 'lines'         => (is => 'lazy');
has 'on_change'     => (is => 'ro', default => sub { sub {} });
has 'no_labels'     => (is => 'ro', default => sub { 0 });
has 'label_width'   => (is => 'ro', default => sub { 180 });

has 'sizer'         => (is => 'rw');
has '_triggers'     => (is => 'ro', default => sub { {} });
has '_setters'      => (is => 'ro', default => sub { {} });

sub _trigger_options {}

sub BUILD {
    my $self = shift;
    
    {
        my $box = Wx::StaticBox->new($self->parent, -1, $self->title);
        $self->sizer(Wx::StaticBoxSizer->new($box, wxVERTICAL));
    }
    
    my $grid_sizer = Wx::FlexGridSizer->new(scalar(@{$self->options}), 2, ($self->no_labels ? 1 : 2), 0);
    $grid_sizer->SetFlexibleDirection(wxHORIZONTAL);
    $grid_sizer->AddGrowableCol($self->no_labels ? 0 : 1);
    
    $self->{sidetext_font} = Wx::SystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
    $self->_build_line($_, $grid_sizer) for @{$self->lines};
    
    # TODO: border size may be related to wxWidgets 2.8.x vs. 2.9.x instead of wxMAC specific
    $self->sizer->Add($grid_sizer, 0, wxEXPAND | wxALL, &Wx::wxMAC ? 0 : 5);
}

# default behavior: one option per line
sub _build_lines {
    my $self = shift;
    
    my $lines = [];
    foreach my $opt (@{$self->options}) {
        push @$lines, {
            label       => $opt->{label},
            sidetext    => $opt->{sidetext},
            full_width  => $opt->{full_width},
            options     => [$opt->{opt_key}],
        };
    }
    return $lines;
}

sub _build_line {
    my $self = shift;
    my ($line, $grid_sizer) = @_;
    
    my $label;
    if (!$self->no_labels) {
        $label = Wx::StaticText->new($self->parent, -1, "$line->{label}:", wxDefaultPosition, [$self->label_width, -1]);
        $label->Wrap($self->label_width) ;  # needed to avoid Linux/GTK bug
        $grid_sizer->Add($label, 0, wxALIGN_CENTER_VERTICAL, 0);
        $label->SetToolTipString($line->{tooltip}) if $line->{tooltip};
    }
    
    my @fields = ();
    foreach my $opt_key (@{$line->{options}}) {
        my $opt = first { $_->{opt_key} eq $opt_key } @{$self->options};
        push @fields, $self->_build_field($opt);
    }
    if (@fields > 1 || $line->{sidetext}) {
        my $sizer = Wx::BoxSizer->new(wxHORIZONTAL);
        $sizer->Add($_, 0, wxALIGN_CENTER_VERTICAL, 0) for @fields;
        my $sidetext = Wx::StaticText->new($self->parent, -1, $line->{sidetext}, wxDefaultPosition, wxDefaultSize);
        $sidetext->SetFont($self->{sidetext_font});
        $sizer->Add($sidetext, 0, wxLEFT | wxALIGN_CENTER_VERTICAL , 4);
        $grid_sizer->Add($sizer);
    } else {
        $grid_sizer->Add($fields[0], 0, ($line->{full_width} ? wxEXPAND : 0) | wxALIGN_CENTER_VERTICAL, 0);
    }
}

sub _build_field {
    my $self = shift;
    my ($opt) = @_;
    
    my $opt_key = $opt->{opt_key};
    $self->_triggers->{$opt_key} = $opt->{on_change} || sub {};
    
    my $field;
    if ($opt->{type} =~ /^(i|f|s|s@)$/) {
        my $style = 0;
        $style = wxTE_MULTILINE if $opt->{multiline};
        my $size = Wx::Size->new($opt->{width} || -1, $opt->{height} || -1);
        
        $field = $opt->{type} eq 'i'
            ? Wx::SpinCtrl->new($self->parent, -1, $opt->{default}, wxDefaultPosition, $size, $style, $opt->{min} || 0, $opt->{max} || 2147483647, $opt->{default})
            : Wx::TextCtrl->new($self->parent, -1, $opt->{default}, wxDefaultPosition, $size, $style);
        $field->Disable if $opt->{readonly};
        $self->_setters->{$opt_key} = sub { $field->SetValue($_[0]) };
        
        my $on_change = sub { $self->_on_change($opt_key, $field->GetValue) };
        $opt->{type} eq 'i'
            ? EVT_SPINCTRL  ($self->parent, $field, $on_change)
            : EVT_TEXT      ($self->parent, $field, $on_change);
    } elsif ($opt->{type} eq 'bool') {
        $field = Wx::CheckBox->new($self->parent, -1, "");
        $field->SetValue($opt->{default});
        EVT_CHECKBOX($self->parent, $field, sub { $self->_on_change($opt_key, $field->GetValue); });
        $self->_setters->{$opt_key} = sub { $field->SetValue($_[0]) };
    } elsif ($opt->{type} eq 'point') {
        $field = Wx::BoxSizer->new(wxHORIZONTAL);
        my $field_size = Wx::Size->new(40, -1);
        my @items = (
            Wx::StaticText->new($self->parent, -1, "x:"),
                my $x_field = Wx::TextCtrl->new($self->parent, -1, $opt->{default}->[0], wxDefaultPosition, $field_size),
            Wx::StaticText->new($self->parent, -1, "  y:"),
                my $y_field = Wx::TextCtrl->new($self->parent, -1, $opt->{default}->[1], wxDefaultPosition, $field_size),
        );
        $field->Add($_, 0, wxALIGN_CENTER_VERTICAL, 0) for @items;
        if ($opt->{tooltip}) {
            $_->SetToolTipString($opt->{tooltip}) for @items;
        }
        EVT_TEXT($self->parent, $_, sub { $self->_on_change($opt_key, [ $x_field->GetValue, $y_field->GetValue ]) })
            for $x_field, $y_field;
        $self->_setters->{$opt_key} = sub {
            $x_field->SetValue($_[0][0]);
            $y_field->SetValue($_[0][1]);
        };
    } elsif ($opt->{type} eq 'select') {
        $field = Wx::ComboBox->new($self->parent, -1, "", wxDefaultPosition, wxDefaultSize, $opt->{labels} || $opt->{values}, wxCB_READONLY);
        EVT_COMBOBOX($self->parent, $field, sub {
            $self->_on_change($opt_key, $opt->{values}[$field->GetSelection]);
        });
        $self->_setters->{$opt_key} = sub {
            $field->SetSelection(grep $opt->{values}[$_] eq $_[0], 0..$#{$opt->{values}});
        };
        $self->_setters->{$opt_key}->($opt->{default});
    } else {
        die "Unsupported option type: " . $opt->{type};
    }
    $field->SetToolTipString($opt->{tooltip}) if $opt->{tooltip} && $field->can('SetToolTipString');
    return $field;
}

sub _option {
    my $self = shift;
    my ($opt_key) = @_;
    
    return first { $_->{opt_key} eq $opt_key } @{$self->options};
}

sub _on_change {
    my $self = shift;
    my ($opt_key, $value) = @_;
    
    return if $self->sizer->GetStaticBox->GetParent->{disabled};
    $self->_triggers->{$opt_key}->($value);
    $self->on_change->($opt_key, $value);
}

=head2 set_value

This method accepts an option key and a value. If this option group contains the supplied
option key, its field will be updated with the new value and the method will return a true
value, otherwise it will return false.

=cut

sub set_value {
    my $self = shift;
    my ($opt_key, $value) = @_;
    
    if ($self->_setters->{$opt_key}) {
        $self->_setters->{$opt_key}->($value);
        $self->_on_change($opt_key, $value);
        return 1;
    }
    
    return 0;
}

package Slic3r::GUI::ConfigOptionsGroup;
use Moo;

extends 'Slic3r::GUI::OptionsGroup';

=head1 NAME

Slic3r::GUI::ConfigOptionsGroup - pre-filled Wx::StaticBoxSizer wrapper containing one or more config options

=head1 SYNOPSIS

    my $optgroup = Slic3r::GUI::ConfigOptionsGroup->new(
        parent      => $self->parent,
        title       => 'Layers',
        config      => $config,
        options     => ['layer_height'],
        on_change   => sub { print "new value for $_[0] is $_[1]\n" },
        no_labels   => 0,
        label_width => 180,
    );
    $sizer->Add($optgroup->sizer);

=cut

use List::Util qw(first);

has 'config' => (is => 'ro', required => 1);

sub _trigger_options {
    my $self = shift;
    
    @{$self->options} = map {
        my $opt = $_;
        if (ref $opt ne 'HASH') {
            my $full_key = $opt;
            my ($opt_key, $index) = $self->_split_key($full_key);
            my $config_opt = $Slic3r::Config::Options->{$opt_key};
            $opt = {
                opt_key     => $full_key,
                config      => 1,
                (map { $_   => $config_opt->{$_} } qw(type label tooltip sidetext width height full_width min max labels values multiline readonly)),
                default     => $self->_get_config($opt_key, $index),
                on_change   => sub { $self->_set_config($opt_key, $index, $_[0]) },
            };
        }
        $opt;
    } @{$self->options};
}

sub _option {
    my $self = shift;
    my ($opt_key) = @_;
    
    return first { $_->{opt_key} =~ /^\Q$opt_key\E(#.+)?$/ } @{$self->options};
}

sub set_value {
    my $self = shift;
    my ($opt_key, $value) = @_;
    
    my $opt = $self->_option($opt_key) or return 0; 
    
    # if user is setting a non-config option, forward the call to the parent
    if (!$opt->{config}) {
        return $self->SUPER::set_value($opt_key, $value);
    }
    
    my $changed = 0;
    foreach my $full_key (keys %{$self->_setters}) {
        my ($key, $index) = $self->_split_key($full_key);
        
        if ($key eq $opt_key) {
            $self->config->set($key, $value);
            $self->SUPER::set_value($full_key, $self->_get_config($key, $index));
            $changed = 1;
        }
    }
    return $changed;
}

sub _split_key {
    my $self = shift;
    my ($opt_key) = @_;
    
    my $index;
    $opt_key =~ s/#(\d+)$// and $index = $1;
    return ($opt_key, $index);
}

sub _get_config {
    my $self = shift;
    my ($opt_key, $index) = @_;
    
    my ($get_m, $serialized) = $self->_config_methods($opt_key, $index);
    my $value = $self->config->$get_m($opt_key);
    if (defined $index) {
        $value->[$index] //= $value->[0]; #/
        $value = $value->[$index];
    }
    return $value;
}

sub _set_config {
    my $self = shift;
    my ($opt_key, $index, $value) = @_;
    
    my ($get_m, $serialized) = $self->_config_methods($opt_key, $index);
    defined $index
        ? $self->config->$get_m($opt_key)->[$index] = $value
        : $self->config->set($opt_key, $value, $serialized);
}

sub _config_methods {
    my $self = shift;
    my ($opt_key, $index) = @_;
    
    # if it's an array type but no index was specified, use the serialized version
    return ($Slic3r::Config::Options->{$opt_key}{type} =~ /\@$/ && !defined $index)
        ? qw(serialize 1)
        : qw(get 0);
}

1;