#!/usr/bin/env ruby
# == Synopsis
# 
# Translate a 2D track file from a single format to many others
#
# == Usage
# 
#   tracksperanto -f ShakeScript /Films/Blockbuster/Shots/001/script.shk -w 1920 -h 1080
#   
# == Author
#   Julik <me@julik.nl>

require File.dirname(__FILE__) + '/../lib/tracksperanto'
require 'optparse'
require 'rubygems'
require 'progressbar'

# Sane defaults
reader_klass_name = nil
width = nil
height = nil

options = {}
$middlewares = []
writer_klass_name = nil
reader_name = "ShakeScript"
readers = Tracksperanto.importer_names
writers = Tracksperanto.exporter_names

op = OptionParser.new

def mw(name, option)
  Proc.new { |value| $middlewares.push([name, {option => value}]) }
end

op.banner = "Usage: tracksperanto -f ShakeScript -w 1920 -h 1080 /Films/Blockbuster/Shots/001/script.shk"
op.on("--code PATH_TO_SCRIPT", String, "Load custom Ruby code into tracksperanto") {|c|  require(c) }
op.on(" -f", "--from TRANSLATOR", String, "Use the specific import translator") { |f| options[:importer] = f }
op.on(" -w", "--width WIDTH_IN_PIXELS", Integer, "Absolute input comp width in pixels (will try to autodetect)") { |w| options[:width] = w }
op.on(" -h", "--height HEIGHT_IN_PIXELS", Integer, "Absolute input comp height in pixels (will try to autodetect)") {|w| options[:height] = w }
op.on(" -o", "--only EXPORTER_NAME", String, "Only export the selected format, format must be one of #{writers.join(", ")}") { |f| writer_klass_name = f }

op.on(" -xs", "--xscale X_SCALING_FACTOR", Float, "Scale the result in X by this factor (1.0 is the default)", &mw("Scaler", :x_factor))
op.on(" -ys", "--yscale Y_SCALING_FACTOR", Float, "Scale the result in Y by this factor (1.0 is the default)", &mw("Scaler", :y_factor))
op.on(" -s", "--slip FRAMES", Integer, "Slip the result by this number of frames, positive is 'later'", &mw("Slipper", :slip))
op.on(" -g", "--golden", "Reset the residuals of all trackers to 0 (ignore correlation)", &mw("Golden", :enabled))
op.on(" -rx", "--reformat-x NEW_PIX_WIDTH", Integer, "Reformat the comp to this width and scale all tracks to it", &mw("Reformat", :width))
op.on(" -ry", "--reformat-y NEW_PIX_HEIGHT", Integer, "Reformat the comp to this height and scale all tracks to it", &mw("Reformat", :height))
op.on(" -m", "--min-length LENGTH_IN_FRAMES", Integer, "Only export trackers having more than X keyframes", &mw("LengthCutoff", :min_length))
op.on(" -xm", "--xshift X_IN_PIXELS", Float, "Move the points left or right", &mw("Shift", :x_shift))
op.on(" -ym", "--yshift Y_IN_PIXELS", Float, "Move the points up or down", &mw("Shift", :y_shift)) 
op.on(" -p", "--prefix PREFIX", String, "A prefix to prepend to tracker names in bulk", &mw("Prefix", :prefix))
op.on("--lerp", "Linearly interpolate missing keyframes", &mw("Lerp", :enabled))

op.on("--version", "Show the version and exit") do |v| 
    puts "Tracksperanto v.#{Tracksperanto::VERSION} running on Ruby #{RUBY_VERSION} on #{RUBY_PLATFORM}"
    puts "Copyright 2008-#{Time.now.year} by Guerilla-DI (Julik Tarkhanov and contributors)"
    puts "For questions and support contact info#{64.chr}guerilla-di.org"
    exit(0)
end

begin
  op.parse!
rescue OptionParser::MissingArgument => e
  STDERR.puts "Unknown argument: #{e.message}"
  puts parser
  exit(-1)
end

input_file = ARGV.pop
if !input_file
  STDERR.puts "No input file provided - should be the last argument. Also use the --help option."
  exit(-1)
end

pbar = ProgressBar.new("Converting", 100)
pipe = Tracksperanto::Pipeline::Base.new(:progress_block => lambda{|p,m| pbar.set(p.to_i) }, :middleware_tuples => $middlewares)

if writer_klass_name
  begin
    pipe.exporters = [Tracksperanto.get_exporter(writer_klass_name)]
  rescue NameError
    STDERR.puts "Unknown exporter #{writer_klass_name}. Available exporters: #{writers.join(", ")}"
    exit(-1)
  end
end

pipe.run(input_file, options)
pbar.finish
puts ("Converted #{pipe.converted_points} trackers with #{pipe.converted_keyframes} keys")