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# Spoutcraft development Rake tasks
# Usage: rake -T
#
# These tasks assume the following folder structure:
#   spoutcraft/
#     lib/
#       spoutcraft-api.jar  A compatible SpoutcraftAPI package
#     mcp/                  Minecraft Coder Pack
#       conf/               Symlink to ../conf
#       lib/                Symlink to ../lib
#     mojang/               Folders corresponding to Minecraft versions
#       1.1/bin/            This Minecraft version's bin folder
#
# Your workflow will probably look something like this:
#
#   1. rake mcp:setup
#   2. rake mcp:decompile
#   3. Make some changes to the Spoutcraft source
#   4. rake mcp:merge
#   5. rake mcp:recompile
#   6. rake mcp:reobfuscate
#   7. rake mcp:client to test your changes
#
# Rinse and repeat!

require "fileutils"
require "logger"
require "open3"
require "pathname"
require "shellwords"

module Spoutcraft
  VERSION = "1.1"

  class << self
    attr_accessor :root, :logger

    def capture(command, options = {})
      options = { :chdir => root }.merge(options)
      debug "Executing `#{command}`..."
      output, status = Open3.capture2e(command.to_s, :chdir => options[:chdir])
      method = if status.exitstatus != 0 then :error else :debug end
      output.each_line { |line| send(method, line.chomp) }
      send method, "Exited with status #{status.exitstatus} (PID #{status.pid})"
      [output, status]
    end
  end

  module MCP
    class << self
      def root
        Spoutcraft.root.join("mcp")
      end

      def run(command, *args)
        command = root.join("#{command}.sh")
        die! "Script not found: #{command}" unless command.exist?
        command = "#{command} #{args.join(" ")}" unless args.empty?
        Spoutcraft.capture(command, :chdir => root)
      end
    end
  end
end

def log(level, *args)
  Spoutcraft.logger.send(level, args.join(" "))
end

def error(*args)
  log(:error, *args)
end

def info(*args)
  log(:info, *args)
end

def debug(*args)
  log(:debug, *args)
end

def debug?
  $DEBUG
end

def die!(message = nil)
  error message if message
  error "Rake task stopped"
  exit 1
end

Spoutcraft.root = Pathname.new(File.dirname(__FILE__))
Spoutcraft.logger = Logger.new(STDOUT)
Spoutcraft.logger.level = if debug? then Logger::DEBUG else Logger::INFO end
FileUtils = FileUtils::Verbose if debug?

namespace :mcp do
  desc "Clean build artifacts"
  task :clean do
    Spoutcraft::MCP.run(:cleanup, "--force")
    FileUtils.rm_rf(Spoutcraft::MCP.root.join("jars", "bin").to_s)
  end

  desc "Copy Minecraft libraries and inject Spoutcraft resources"
  task :setup do
    source_path = Spoutcraft.root.join("mojang", Spoutcraft::VERSION, "bin")
    dest_path = Spoutcraft::MCP.root.join("jars")
    FileUtils.rm_rf(dest_path.join("bin").to_s)
    FileUtils.cp_r(source_path.to_s, dest_path.to_s)

    source_path = File.join("res", "*")
    dest_path = Spoutcraft::MCP.root.join("jars", "bin", "minecraft.jar")
    command = "jar -uvf #{dest_path.to_s.shellescape} #{source_path}"
    Spoutcraft.capture(command)
  end

  desc "Decompile and unobfuscate Minecraft source code"
  task :decompile do
    Spoutcraft::MCP.run(:decompile)
  end

  desc "Merge Spoutcraft and MCP source code and resources"
  task :merge do
    source_path = Spoutcraft.root.join("src")
    dest_path = Spoutcraft::MCP.root.join("src")
    command = "ditto -V #{source_path.to_s.shellescape} #{dest_path.to_s.shellescape}"
    Spoutcraft.capture(command)
  end

  desc "Recompile Minecraft source code"
  task :recompile do
    Spoutcraft::MCP.run(:recompile)
  end

  desc "Reobfuscate compiled Minecraft source code"
  task :reobfuscate do
    Spoutcraft::MCP.run(:reobfuscate)
  end

  desc "Run client"
  task :client do
    Spoutcraft::MCP.run(:startclient)
  end

  desc "Run server"
  task :server do
    Spoutcraft::MCP.run(:startserver)
  end

  desc "Merge source, recompile, and run client"
  task :test => [:merge, :recompile, :client]

  namespace :update do
    desc "Update MCP"
    task :mcp do
      Spoutcraft::MCP.run(:updatemcp)
    end

    desc "Update MD5s"
    task :md5 do
      Spoutcraft::MCP.run(:updatemd5)
    end

    desc "Update names"
    task :names do
      Spoutcraft::MCP.run(:updatenames)
    end
  end
end