module V8::To

def camel_case(str)
  str.to_s.gsub(/_(\w)/) {$1.upcase}
end

def peer(value)
  external = value.GetHiddenValue(C::String::NewSymbol("TheRubyRacer::RubyObject"))
  if external && !external.IsEmpty()
    external.Value()
  else
    yield.new(value)
  end
end

def perl_case(str)
  str.gsub(/([A-Z])([a-z])/) {"_#{$1.downcase}#{$2}"}.downcase
end

def rb(value)
  case value
  when V8::C::Function  then peer(value) {V8::Function}
  when V8::C::Array     then peer(value) {V8::Array}
  when V8::C::Object    then peer(value) {V8::Object}
  when V8::C::String    then value.Utf8Value()
  when V8::C::Date      then Time.at(value.NumberValue())
  when V8::C::Value     then nil if value.IsEmpty()
  else
    value
  end
end

def v8(value)
  case value
  when V8::Object
    value.instance_eval {@native}
  when String
    C::String::New(value.to_s)
  when Symbol
    C::String::NewSymbol(value.to_s)
  when Proc,Method
    template = C::FunctionTemplate::New() do |arguments|
      rbargs = []
      for i in 0..arguments.Length() - 1
        rbargs << To.rb(arguments[i])
      end
      V8::Function.rubycall(value, *rbargs)
    end
    return template.GetFunction()
  when ::Array
    C::Array::New(value.length).tap do |a|
      value.each_with_index do |item, i|
        a.Set(i, To.v8(item))
      end
    end
  when ::Hash
    C::Object::New().tap do |o|
      value.each do |key, value|
        o.Set(To.v8(key), To.v8(value))
      end
    end
  when ::Time
    C::Date::New(value)
  when ::Class
    Constructors[value].GetFunction().tap do |f|
      f.SetHiddenValue(C::String::NewSymbol("TheRubyRacer::RubyObject"), C::External::New(value))
    end
  when nil,Numeric,TrueClass,FalseClass, C::Value
    value
  else
    args = C::Array::New(1)
    args.Set(0, C::External::New(value))
    obj = Access[value.class].GetFunction().NewInstance(args)
    return obj
  end
end