class Gear

# File lib/gear.rb, line 30
def self.initialized?
  @@initialized
end

# File lib/gear.rb, line 25
def self.install_path(new_path = nil)
  @@install_path = new_path unless new_path.nil?
  @@install_path
end

# File lib/gear.rb, line 47
def initialize()
  puts "Gear install path set to: #{@@install_path}"
  @obtained = @built = @installed = @checked = false
  @build_path = _root_path() + "/build/#{name()}"
  _setup_paths()
  Dir.chdir(_root_path() + "/build")

  @@initialized = true
end

# File lib/gear.rb, line 63
def build()
  STDERR.puts "WARNING: Gear did not override build method. Nothing was built."
  @built = false
  return false
end

# File lib/gear.rb, line 75
def check()
  STDERR.puts "WARNING: Gear did not override check method. Status is unknown."
  @checked = false
  return false
end

# File lib/gear.rb, line 102
def disengage()
  uninstall &&
  remove
end

# File lib/gear.rb, line 81
def engage()
  !check && # bail if already installed
  obtain &&
  build &&
  install &&
  check
end

# File lib/gear.rb, line 153
def gear_exec(command = "")
  `LD_LIBRARY_PATH=#{@@install_path}/lib:$LD_LIBRARY_PATH C_INCLUDE_PATH=#{@@install_path}/include:$C_INCLUDE_PATH PATH=#{@@install_path}/bin:$PATH #{command}`
end

# File lib/gear.rb, line 157
def gear_exec_mac()
  `mdfind -onlyin #{@@install_path} -name #{name} -count`.chomp.to_i
end

# File lib/gear.rb, line 108
def git_obtain(repository, branch)
  Dir.chdir(_root_path + '/build')
  begin
    if Dir.exist? build_path
      @git = Git.open(build_path)
      @git.reset("HEAD", hard: true)
      @git.clean(force: true, d: true, x:true)
    else
      @git = Git.clone(repository, build_path)
    end
  rescue StandardError => e 
    STDERR.puts "Could not obtain repository #{repository}.\n#{e}"
    @obtained = false
    return false
  end

  @git.checkout(branch)
  @git.pull

  Dir.chdir(@build_path)
  `git submodule update --init --recursive`

  @obtained = true
  return true
end

# File lib/gear.rb, line 134
def github_obtain(user, repository, branch = 'master')
  git_obtain("https://github.com/#{user}/#{repository}.git", branch)
end

# File lib/gear.rb, line 69
def install()
  STDERR.puts "WARNING: Gear did not override install method. Nothing has been installed."
  @installed = false
  return false
end

# File lib/gear.rb, line 38
def name()
  self.class.gear_name
end

# File lib/gear.rb, line 57
def obtain()
  STDERR.puts "WARNING: Gear did not override obtain method. No sources were obtained."
  @obtained = false
  return false
end

# File lib/gear.rb, line 89
def remove()
  Dir.chdir(_root_path + '/build')
  FileUtils.rm_rf("#{@build_path}")
  @obtained = false
  return true
end

# File lib/gear.rb, line 138
def std_config_make(flags = "")
  Dir.chdir(@build_path)
  `autoconf` if !File.exist? 'configure'
  `./confirgure --prefix#{@@install_path}`
  `make`
end

# File lib/gear.rb, line 145
def std_make_install()
  Dir.chdir(@build_path)
  `make install`
  @installed = true
  return true
end

# File lib/gear.rb, line 42
def target(new_target = nil)
  @@install_path = new_target unless new_target.nil?
  @@install_path
end

# File lib/gear.rb, line 96
def uninstall()
  # set @installed to false on a succesfully uninstall
  STDERR.puts "WARNING: Gear did not override uninstall method."
  return false
end

# File lib/gear.rb, line 162
def _root_path()
  File.expand_path('../..', __FILE__)
end

# File lib/gear.rb, line 167
def _setup_paths()
  #puts "⚙Preparing directory structure in #{@@install_path}"
  return if @@initialized

  FileUtils.mkdir_p("#{_root_path}/build")
  FileUtils.mkdir_p("#{@@install_path}/bin")
  FileUtils.mkdir_p("#{@@install_path}/include")
  FileUtils.mkdir_p("#{@@install_path}/lib")

  ENV['PATH'] = (ENV['PATH'].nil? ?
    "#{@@install_path}/bin" : ENV['PATH'] + ":#{@@install_path}/bin")
  `export PATH=#{ENV['PATH']}`
  #ENV['C_INCLUDE_PATH'] = ENV['C_INCLUDE_PATH'].to_s + ":#{@@install_path}/include"
  #ENV['CPLUS_INCLUDE_PATH'] = ENV['CPLUS_INCLUDE_PATH'].to_s + ":#{@@install_path}/include"
  ENV['CPATH'] = (ENV['CPATH'].nil? ?
    "#{@@install_path}/include" : ENV['CPATH'] + ":#{@@install_path}/include")
  `export CPATH=#{ENV['CPATH']}`

  ENV['LD_LIBRARY_PATH'] = (ENV['LD_LIBRARY_PATH'].nil? ?
    "#{@@install_path}/lib" : ENV['LD_LIBRARY_PATH'] + ":#{@@install_path}/lib")
  `export LD_LIBRARY_PATH=#{ENV['LD_LIBRARY_PATH']}`

  ENV['LIBRARY_PATH'] = (ENV['LIBRARY_PATH'].nil? ?
    "#{@@install_path}/lib" : ENV['LIBRARY_PATH'] + ":#{@@install_path}/lib")
  `export LIBRARY_PATH=#{ENV['LIBRARY_PATH']}`
end