class GdsApi::PublishingApiV2

def content_url(content_id, params = {})
  validate_content_id(content_id)
  query = query_string(params)
  "#{endpoint}/v2/content/#{content_id}#{query}"
end

def discard_draft(content_id, options = {})
  optional_keys = [
    :locale,
    :previous_version,
  ]
  params = merge_optional_keys({}, options, optional_keys)
  post_json!(discard_url(content_id), params)
end

def discard_url(content_id)
  validate_content_id(content_id)
  "#{endpoint}/v2/content/#{content_id}/discard-draft"
end

def get_content(content_id, options = {})
  params = {}
  params = params.merge(locale: options[:locale]) if options[:locale]
  get_json(content_url(content_id, params))
end

def get_content_items(params)
  query = query_string(params)
  get_json("#{endpoint}/v2/content#{query}")
end

def get_linked_items(content_id, params = {})
  query = query_string(params)
  validate_content_id(content_id)
  get_json("#{endpoint}/v2/linked/#{content_id}#{query}")
end

def get_links(content_id)
  get_json(links_url(content_id))
end

def links_url(content_id)
  validate_content_id(content_id)
  "#{endpoint}/v2/links/#{content_id}"
end

def merge_optional_keys(params, options, optional_keys)
  optional_keys.each_with_object(params) do |optional_key, hash|
    hash.merge!(optional_key => options[optional_key]) if options[optional_key]
  end
end

def publish(content_id, update_type, options = {})
  params = {
    update_type: update_type
  }
  optional_keys = [
    :locale,
    :previous_version,
  ]
  params = merge_optional_keys(params, options, optional_keys)
  post_json!(publish_url(content_id), params)
end

def publish_url(content_id)
  validate_content_id(content_id)
  "#{endpoint}/v2/content/#{content_id}/publish"
end

def put_content(content_id, payload)
  put_json!(content_url(content_id), payload)
end

def put_links(content_id, payload)
  params = {
    links: payload.fetch(:links)
  }
  params = merge_optional_keys(params, payload, [:previous_version])
  put_json!(links_url(content_id), params)
end

def validate_content_id(content_id)
  raise ArgumentError, "content_id cannot be nil" unless content_id
end