# Extends C++ class Slic3r::DynamicPrintConfig
# This perl class does not keep any perl class variables,
# all the storage is handled by the underlying C++ code.
package Slic3r::Config;
use strict;
use warnings;
use utf8;

use List::Util qw(first max);

# C++ Slic3r::PrintConfigDef exported as a Perl hash of hashes.
# The C++ counterpart is a constant singleton.
our $Options = print_config_def();

# overwrite the hard-coded readonly value (this information is not available in XS)
$Options->{threads}{readonly} = !$Slic3r::have_threads;

# generate accessors
{
    no strict 'refs';
    for my $opt_key (keys %$Options) {
        *{$opt_key} = sub { $_[0]->get($opt_key) };
    }
}

# From command line parameters, used by slic3r.pl
sub new_from_cli {
    my $class = shift;
    my %args = @_;
    
    # Delete hash keys with undefined value.
    delete $args{$_} for grep !defined $args{$_}, keys %args;
    
    # Replace the start_gcode, end_gcode ... hash values
    # with the content of the files they reference.
    for (qw(start end layer toolchange)) {
        my $opt_key = "${_}_gcode";
        if ($args{$opt_key}) {
            if (-e $args{$opt_key}) {
                Slic3r::open(\my $fh, "<", $args{$opt_key})
                    or die "Failed to open $args{$opt_key}\n";
                binmode $fh, ':utf8';
                $args{$opt_key} = do { local $/; <$fh> };
                close $fh;
            }
        }
    }

    my $self = $class->new;
    foreach my $opt_key (keys %args) {
        my $opt_def = $Options->{$opt_key};
        
        # we use set_deserialize() for bool options since GetOpt::Long doesn't handle 
        # arrays of boolean values
        if ($opt_key =~ /^(?:bed_shape|duplicate_grid|extruder_offset)$/ || $opt_def->{type} eq 'bool') {
            $self->set_deserialize($opt_key, $args{$opt_key});
        } elsif (my $shortcut = $opt_def->{shortcut}) {
            $self->set($_, $args{$opt_key}) for @$shortcut;
        } else {
            $self->set($opt_key, $args{$opt_key});
        }
    }
    
    return $self;
}

# CLASS METHODS:

# Write a "Windows" style ini file with categories enclosed in squre brackets.
# Used by config-bundle-to-config.pl and to save slic3r.ini.
sub write_ini {
    my $class = shift;
    my ($file, $ini) = @_;
    
    Slic3r::open(\my $fh, '>', $file);
    binmode $fh, ':utf8';
    my $localtime = localtime;
    printf $fh "# generated by Slic3r $Slic3r::VERSION on %s\n", "$localtime";
    # make sure the _ category is the first one written
    foreach my $category (sort { ($a eq '_') ? -1 : ($a cmp $b) } keys %$ini) {
        printf $fh "\n[%s]\n", $category if $category ne '_';
        foreach my $key (sort keys %{$ini->{$category}}) {
            printf $fh "%s = %s\n", $key, $ini->{$category}{$key};
        }
    }
    close $fh;
}

# Parse a "Windows" style ini file with categories enclosed in squre brackets.
# Returns a hash of hashes over strings.
# {category}{name}=value
# Non-categorized entries are stored under a category '_'.
# Used by config-bundle-to-config.pl and to read slic3r.ini.
sub read_ini {
    my $class = shift;
    my ($file) = @_;
    
    local $/ = "\n";
    Slic3r::open(\my $fh, '<', $file)
        or die "Unable to open $file: $!\n";
    binmode $fh, ':utf8';
    
    my $ini = { _ => {} };
    my $category = '_';
    while (<$fh>) {
        s/\R+$//;
        next if /^\s+/;
        next if /^$/;
        next if /^\s*#/;
        if (/^\[(.+?)\]$/) {
            $category = $1;
            next;
        }
        /^(\w+) *= *(.*)/ or die "Unreadable configuration file (invalid data at line $.)\n";
        $ini->{$category}{$1} = $2;
    }
    close $fh;
    
    return $ini;
}

package Slic3r::Config::Static;
use parent 'Slic3r::Config';

sub Slic3r::Config::GCode::new { Slic3r::Config::Static::new_GCodeConfig }
sub Slic3r::Config::Print::new { Slic3r::Config::Static::new_PrintConfig }
sub Slic3r::Config::PrintObject::new { Slic3r::Config::Static::new_PrintObjectConfig }
sub Slic3r::Config::PrintRegion::new { Slic3r::Config::Static::new_PrintRegionConfig }
sub Slic3r::Config::Full::new { Slic3r::Config::Static::new_FullPrintConfig }

1;