class GraphQL::Rubocop::GraphQL::FieldTypeInBlock

def delete_type_argument(send_node, type_const)
  first_pos = type_const.location.expression.begin_pos
  end_pos = type_const.location.expression.end_pos
  node_source = send_node.source_range.source
  node_first_pos = send_node.location.expression.begin_pos
  relative_first_pos = first_pos - node_first_pos
  end_removal_pos = end_pos - node_first_pos
  begin_removal_pos = relative_first_pos
  while node_source[begin_removal_pos] != ","
    begin_removal_pos -= 1
    if begin_removal_pos < 1
      raise "Invariant: somehow backtracked to beginning of node looking for a comma (node source: #{node_source.inspect})"
    end
  end
  node_source[0...begin_removal_pos] + node_source[end_removal_pos..-1]
end

def determine_field_indent(send_node)
  type_defn_node = send_node
  while (type_defn_node && !(type_defn_node.class_definition? || type_defn_node.module_definition?))
    type_defn_node = type_defn_node.parent
  end
  if type_defn_node.nil?
    raise "Invariant: Something went wrong in GraphQL-Ruby, couldn't find surrounding class definition for field (#{send_node}).\n\nPlease report this error on GitHub."
  end
  type_defn_source = type_defn_node.source
  indent_test_idx = send_node.location.expression.begin_pos - type_defn_node.source_range.begin_pos - 1
  field_indent = "".dup
  while type_defn_source[indent_test_idx] == " "
    field_indent << " "
    indent_test_idx -= 1
    if indent_test_idx == 0
      raise "Invariant: somehow backtracted to beginning of class when looking for field indent (source: #{node_source.inspect})"
    end
  end
  field_indent
end

def get_type_argument_str(send_node, type_const)
  first_pos = type_const.location.expression.begin_pos
  end_pos = type_const.location.expression.end_pos
  node_source = send_node.source_range.source
  node_first_pos = send_node.location.expression.begin_pos
  relative_first_pos = first_pos - node_first_pos
  end_removal_pos = end_pos - node_first_pos
  node_source[relative_first_pos...end_removal_pos]
end

def ignore_inline_type_str?(type_str)
  if BUILT_IN_SCALAR_NAMES.include?(type_str)
    true
  elsif (inner_type_str = type_str.sub(/\[([A-Za-z]+)(, null: (true|false))?\]/, '\1')) && BUILT_IN_SCALAR_NAMES.include?(inner_type_str)
    true
  else
    false
  end
end

def on_block(node)
  ignore_node(node)
  field_config_with_inline_type_and_block(node) do |type_const|
    type_const_str = get_type_argument_str(node, type_const)
    if ignore_inline_type_str?(type_const_str)
      # Do nothing ...
    else
      add_offense(type_const) do |corrector|
        cleaned_node_source = delete_type_argument(node, type_const)
        field_indent = determine_field_indent(node)
        cleaned_node_source.sub!(/(\{|do)/, "\\1\n#{field_indent}  type #{type_const_str}")
        corrector.replace(node, cleaned_node_source)
      end
    end
  end
end

def on_send(node)
  return if part_of_ignored_node?(node)
  field_config_with_inline_type(node) do |type_const|
    type_const_str = get_type_argument_str(node, type_const)
    if ignore_inline_type_str?(type_const_str)
      # Do nothing -- not loading from another file
    else
      add_offense(type_const) do |corrector|
        cleaned_node_source = delete_type_argument(node, type_const)
        field_indent = determine_field_indent(node)
        cleaned_node_source += " do\n#{field_indent}  type #{type_const_str}\n#{field_indent}end"
        corrector.replace(node, cleaned_node_source)
      end
    end
  end
end