#!/usr/bin/ruby

require 'fileutils'
require 'tmpdir'

if ARGV.size != 0
  puts "usage: #{File.basename $0}"
  exit 1
end

WEB_INSPECTOR_PATH = File.expand_path File.join(File.dirname(__FILE__), "..")
JAVASCRIPTCORE_PATH = File.expand_path File.join(File.dirname(__FILE__), "..", "..", "JavaScriptCore")

$code_generator_path = File.join JAVASCRIPTCORE_PATH, "inspector", "scripts", "CodeGeneratorInspector.py"
$versions_directory_path = File.join WEB_INSPECTOR_PATH, "Versions"
$web_inspector_protocol_legacy_path = File.join WEB_INSPECTOR_PATH, "UserInterface", "Protocol", "Legacy"

class Task
  def initialize(input_json_path, dependency_json_path, type, output_directory_path)
    @type = type
    @input_json_path = input_json_path
    @dependency_json_path = dependency_json_path
    @output_directory_path = output_directory_path
  end

  def run
    output_filename_prefix = {"JavaScript" => "JS", "Web" => "Web"}[@type]
    output_filename = "Inspector#{output_filename_prefix}BackendCommands.js"
    display_input = File.basename @input_json_path
    display_output = File.join @output_directory_path.gsub(/^.*?\/UserInterface/, "UserInterface"), output_filename
    puts "#{display_input} -> #{display_output}"

    Dir.mktmpdir do |tmpdir|
      dependency = @dependency_json_path ? "'#{@dependency_json_path}'" : ""
      cmd = "#{$code_generator_path} '#{@input_json_path}' #{dependency} --no_verification --output_h_dir '#{tmpdir}' --output_cpp_dir '#{tmpdir}' --output_js_dir '#{tmpdir}' --write_always --output_type '#{@type}'"
      %x{ #{cmd} }
      if $?.exitstatus != 0
        puts "ERROR: Error Code (#{$?.exitstatus}) Evaluating: #{cmd}"
        exit 1
      end

      generated_path = File.join tmpdir, output_filename
      if !File.exists?(generated_path)
        puts "ERROR: Generated file does not exist at expected path."
        exit 1
      end

      FileUtils.mkdir_p @output_directory_path
      FileUtils.cp generated_path, @output_directory_path
    end
  end
end

def all_tasks
  tasks = []

  had_error = false
  Dir.glob(File.join($versions_directory_path, "*.json")).each do |version_path|
    match = File.basename(version_path).match(/^Inspector(.*?)\-([^-]+?)\.json$/)
    if match
      output_path = File.join $web_inspector_protocol_legacy_path, match[2]
      tasks << Task.new(version_path, nil, "Web", output_path)
    else
      puts "ERROR: Version file (#{version_path}) did not match the template Inspector<ANYTHING>-<VERSION>.js"
      had_error = true
    end
  end
  exit 1 if had_error

  tasks
end

def main
  all_tasks.each { |task| task.run }
end

main