#!/usr/bin/perl

use strict;
use warnings;

BEGIN {
    use FindBin;
    use lib "$FindBin::Bin/lib";
}

use Getopt::Long qw(:config no_auto_abbrev);
use List::Util qw(first);
use Slic3r;
$|++;

our %opt = ();
my %cli_options = ();
{
    my %options = (
        'help'                  => sub { usage() },
        'version'               => sub { print "$Slic3r::VERSION\n"; exit 0 },
        
        'debug'                 => \$Slic3r::debug,
        'gui'                   => \$opt{gui},
        'o|output=s'            => \$opt{output},
        
        'save=s'                => \$opt{save},
        'load=s@'               => \$opt{load},
        'ignore-nonexistent-config' => \$opt{ignore_nonexistent_config},
        'datadir=s'             => \$opt{datadir},
        'export-svg'            => \$opt{export_svg},
        'merge|m'               => \$opt{merge},
    );
    foreach my $opt_key (keys %{$Slic3r::Config::Options}) {
        my $cli = $Slic3r::Config::Options->{$opt_key}->{cli} or next;
        # allow both the dash-separated option name and the full opt_key
        $options{ "$opt_key|$cli" } = \$cli_options{$opt_key};
    }
    
    GetOptions(%options) or usage(1);
}

# process command line options
my $cli_config = Slic3r::Config->new_from_cli(%cli_options);

# load configuration files
my @external_configs = ();
if ($opt{load}) {
    foreach my $configfile (@{$opt{load}}) {
        if (-e $configfile) {
            push @external_configs, Slic3r::Config->load($configfile);
        } elsif (-e "$FindBin::Bin/$configfile") {
            printf STDERR "Loading $FindBin::Bin/$configfile\n";
            push @external_configs, Slic3r::Config->load("$FindBin::Bin/$configfile");
        } else {
            $opt{ignore_nonexistent_config} or die "Cannot find specified configuration file ($configfile).\n";
        }
    }
}

# merge configuration
my $config = Slic3r::Config->new_from_defaults;
$config->apply($_) for @external_configs, $cli_config;

# save configuration
if ($opt{save}) {
    $config->validate;
    $config->save($opt{save});
}

# launch GUI
my $gui;
if (!@ARGV && !$opt{save} && eval "require Slic3r::GUI; 1") {
    {
        no warnings 'once';
        $Slic3r::GUI::datadir = $opt{datadir} if $opt{datadir};
    }
    $gui = Slic3r::GUI->new;
    $gui->{skeinpanel}->load_config_file($_) for @{$opt{load}};
    $gui->{skeinpanel}->load_config($cli_config);
    $gui->MainLoop;
    exit;
}
die $@ if $@ && $opt{gui};

if (@ARGV) {  # slicing from command line
    $config->validate;
    
    while (my $input_file = shift @ARGV) {
        my $print = Slic3r::Print->new(config => $config);
        $print->add_objects_from_file($input_file);
        if ($opt{merge}) {
            $print->add_objects_from_file($_) for splice @ARGV, 0;
        }
        $print->duplicate;
        $print->arrange_objects if @{$print->objects} > 1;
        $print->validate;
        my %params = (
            output_file => $opt{output},
            status_cb   => sub {
                my ($percent, $message) = @_;
                printf "=> %s\n", $message;
            },
        );
        if ($opt{export_svg}) {
            $print->export_svg(%params);
        } else {
            $print->export_gcode(%params);
        }
    }
} else {
    usage(1) unless $opt{save};
}

sub usage {
    my ($exit_code) = @_;
    
    my $config = Slic3r::Config->new_from_defaults;
    
    my $j = '';
    if ($Slic3r::have_threads) {
        $j = <<"EOF";
    -j, --threads <num> Number of threads to use (1+, default: $config->{threads})
EOF
    }
    
    print <<"EOF";
Slic3r $Slic3r::VERSION is a STL-to-GCODE translator for RepRap 3D printers
written by Alessandro Ranellucci <aar\@cpan.org> - http://slic3r.org/

Usage: slic3r.pl [ OPTIONS ] file.stl

    --help              Output this usage screen and exit
    --version           Output the version of Slic3r and exit
    --save <file>       Save configuration to the specified file
    --load <file>       Load configuration from the specified file. It can be used 
                        more than once to load options from multiple files.
    -o, --output <file> File to output gcode to (by default, the file will be saved
                        into the same directory as the input file using the 
                        --output-filename-format to generate the filename)
$j
  Output options:
    --output-filename-format
                        Output file name format; all config options enclosed in brackets
                        will be replaced by their values, as well as [input_filename_base]
                        and [input_filename] (default: $config->{output_filename_format})
    --post-process      Generated G-code will be processed with the supplied script;
                        call this more than once to process through multiple scripts.
    --export-svg        Export a SVG file containing slices instead of G-code.
    -m, --merge         If multiple files are supplied, they will be composed into a single 
                        print rather than processed individually.
  
  Printer options:
    --nozzle-diameter   Diameter of nozzle in mm (default: $config->{nozzle_diameter}->[0])
    --print-center      Coordinates in mm of the point to center the print around 
                        (default: $config->{print_center}->[0],$config->{print_center}->[1])
    --z-offset          Additional height in mm to add to vertical coordinates
                        (+/-, default: $config->{z_offset})
    --gcode-flavor      The type of G-code to generate (reprap/teacup/makerbot/mach3/no-extrusion,
                        default: $config->{gcode_flavor})
    --use-relative-e-distances Enable this to get relative E values
    --gcode-arcs        Use G2/G3 commands for native arcs (experimental, not supported
                        by all firmwares)
    --g0                Use G0 commands for retraction (experimental, not supported by all
                        firmwares)
    --gcode-comments    Make G-code verbose by adding comments (default: no)
    
  Filament options:
    --filament-diameter Diameter in mm of your raw filament (default: $config->{filament_diameter}->[0])
    --extrusion-multiplier
                        Change this to alter the amount of plastic extruded. There should be
                        very little need to change this value, which is only useful to 
                        compensate for filament packing (default: $config->{extrusion_multiplier}->[0])
    --temperature       Extrusion temperature in degree Celsius, set 0 to disable (default: $config->{temperature}->[0])
    --first-layer-temperature Extrusion temperature for the first layer, in degree Celsius,
                        set 0 to disable (default: same as --temperature)
    --bed-temperature   Heated bed temperature in degree Celsius, set 0 to disable (default: $config->{bed_temperature})
    --first-layer-bed-temperature Heated bed temperature for the first layer, in degree Celsius,
                        set 0 to disable (default: same as --bed-temperature)
    
  Speed options:
    --travel-speed      Speed of non-print moves in mm/s (default: $config->{travel_speed})
    --perimeter-speed   Speed of print moves for perimeters in mm/s (default: $config->{perimeter_speed})
    --small-perimeter-speed
                        Speed of print moves for small perimeters in mm/s or % over perimeter speed
                        (default: $config->{small_perimeter_speed})
    --external-perimeter-speed
                        Speed of print moves for the external perimeter in mm/s or % over perimeter speed
                        (default: $config->{external_perimeter_speed})
    --infill-speed      Speed of print moves in mm/s (default: $config->{infill_speed})
    --solid-infill-speed Speed of print moves for solid surfaces in mm/s or % over infill speed
                        (default: $config->{solid_infill_speed})
    --top-solid-infill-speed Speed of print moves for top surfaces in mm/s or % over solid infill speed
                        (default: $config->{top_solid_infill_speed})
    --bridge-speed      Speed of bridge print moves in mm/s (default: $config->{bridge_speed})
    --first-layer-speed Speed of print moves for bottom layer, expressed either as an absolute
                        value or as a percentage over normal speeds (default: $config->{first_layer_speed})
    
  Accuracy options:
    --layer-height      Layer height in mm (default: $config->{layer_height})
    --first-layer-height Layer height for first layer (mm or %, default: $config->{first_layer_height})
    --infill-every-layers
                        Infill every N layers (default: $config->{infill_every_layers})
  
  Print options:
    --perimeters        Number of perimeters/horizontal skins (range: 0+, default: $config->{perimeters})
    --solid-layers      Number of solid layers to do for top/bottom surfaces
                        (range: 1+, default: $config->{solid_layers})
    --fill-density      Infill density (range: 0-1, default: $config->{fill_density})
    --fill-angle        Infill angle in degrees (range: 0-90, default: $config->{fill_angle})
    --fill-pattern      Pattern to use to fill non-solid layers (default: $config->{fill_pattern})
    --solid-fill-pattern Pattern to use to fill solid layers (default: $config->{solid_fill_pattern})
    --start-gcode       Load initial G-code from the supplied file. This will overwrite
                        the default command (home all axes [G28]).
    --end-gcode         Load final G-code from the supplied file. This will overwrite 
                        the default commands (turn off temperature [M104 S0],
                        home X axis [G28 X], disable motors [M84]).
    --layer-gcode       Load layer-change G-code from the supplied file (default: nothing).
    --extra-perimeters  Add more perimeters when needed (default: yes)
    --randomize-start   Randomize starting point across layers (default: yes)
    --only-retract-when-crossing-perimeters
                        Disable retraction when travelling between infill paths inside the same island.
                        (default: no)
    --solid-infill-below-area
                        Force solid infill when a region has a smaller area than this threshold
                        (mm^2, default: $config->{solid_infill_below_area})
  
   Support material options:
    --support-material  Generate support material for overhangs
    --support-material-threshold
                        Overhang threshold angle (range: 0-90, default: $config->{support_material_threshold})
    --support-material-pattern
                        Pattern to use for support material (default: $config->{support_material_pattern})
    --support-material-spacing
                        Spacing between pattern lines (mm, default: $config->{support_material_spacing})
    --support-material-angle
                        Support material angle in degrees (range: 0-90, default: $config->{support_material_angle})
  
   Retraction options:
    --retract-length    Length of retraction in mm when pausing extrusion (default: $config->{retract_length}[0])
    --retract-speed     Speed for retraction in mm/s (default: $config->{retract_speed}[0])
    --retract-restart-extra
                        Additional amount of filament in mm to push after
                        compensating retraction (default: $config->{retract_restart_extra}[0])
    --retract-before-travel
                        Only retract before travel moves of this length in mm (default: $config->{retract_before_travel}[0])
    --retract-lift      Lift Z by the given distance in mm when retracting (default: $config->{retract_lift}[0])
    
   Retraction options for multi-extruder setups:
    --retract-length-toolchange
                        Length of retraction in mm when disabling tool (default: $config->{retract_length}[0])
    --retract-restart-extra-toolchnage
                        Additional amount of filament in mm to push after
                        switching tool (default: $config->{retract_restart_extra}[0])
   
   Cooling options:
    --cooling           Enable fan and cooling control
    --min-fan-speed     Minimum fan speed (default: $config->{min_fan_speed}%)
    --max-fan-speed     Maximum fan speed (default: $config->{max_fan_speed}%)
    --bridge-fan-speed  Fan speed to use when bridging (default: $config->{bridge_fan_speed}%)
    --fan-below-layer-time Enable fan if layer print time is below this approximate number 
                        of seconds (default: $config->{fan_below_layer_time})
    --slowdown-below-layer-time Slow down if layer print time is below this approximate number
                        of seconds (default: $config->{slowdown_below_layer_time})
    --min-print-speed   Minimum print speed (mm/s, default: $config->{min_print_speed})
    --disable-fan-first-layers Disable fan for the first N layers (default: $config->{disable_fan_first_layers})
    --fan-always-on     Keep fan always on at min fan speed, even for layers that don't need
                        cooling
   
   Skirt options:
    --skirts            Number of skirts to draw (0+, default: $config->{skirts})
    --skirt-distance    Distance in mm between innermost skirt and object 
                        (default: $config->{skirt_distance})
    --skirt-height      Height of skirts to draw (expressed in layers, 0+, default: $config->{skirt_height})
    --brim-width        Width of the brim that will get added to each object to help adhesion
                        (mm, default: $config->{brim_width})
   
   Transform options:
    --scale             Factor for scaling input object (default: $config->{scale})
    --rotate            Rotation angle in degrees (0-360, default: $config->{rotate})
    --duplicate         Number of items with auto-arrange (1+, default: $config->{duplicate})
    --bed-size          Bed size, only used for auto-arrange (mm, default: $config->{bed_size}->[0],$config->{bed_size}->[1])
    --duplicate-grid    Number of items with grid arrangement (default: $config->{duplicate_grid}->[0],$config->{duplicate_grid}->[1])
    --duplicate-distance Distance in mm between copies (default: $config->{duplicate_distance})
   
   Sequential printing options:
    --complete-objects  When printing multiple objects and/or copies, complete each one before
                        starting the next one; watch out for extruder collisions (default: no)
    --extruder-clearance-radius Radius in mm above which extruder won't collide with anything
                        (default: $config->{extruder_clearance_radius})
    --extruder-clearance-height Maximum vertical extruder depth; i.e. vertical distance from 
                        extruder tip and carriage bottom (default: $config->{extruder_clearance_height})
   
   Miscellaneous options:
    --notes             Notes to be added as comments to the output file
  
   Flow options (advanced):
    --extrusion-width   Set extrusion width manually; it accepts either an absolute value in mm
                        (like 0.65) or a percentage over layer height (like 200%)
    --first-layer-extrusion-width
                        Set a different extrusion width for first layer
    --perimeters-extrusion-width
                        Set a different extrusion width for perimeters
    --infill-extrusion-width
                        Set a different extrusion width for infill
    --support-material-extrusion-width
                        Set a different extrusion width for support material
    --bridge-flow-ratio Multiplier for extrusion when bridging (> 0, default: $config->{bridge_flow_ratio})
  
   Multiple extruder options:
    --extruder-offset   Offset of each extruder, if firmware doesn't handle the displacement
                        (can be specified multiple times, default: 0x0)
    --perimeters-extruder
                        Extruder to use for perimeters (1+, default: 1)
    --infill-extruder   Extruder to use for infill (1+, default: 1)
    --support-material-extruder
                        Extruder to use for support material (1+, default: 1)
    
EOF
    exit ($exit_code || 0);
}

__END__