defmodule LineMessage.Message do

  
  def text(messages \\ [], txt) do
    messages ++ [%{
		                type: "text",
                    text: txt
                 }]
  end

  def image(messages \\ [],
    %{original_content_url: original_url, preview_image_url: preview_url}) do
    messages ++ [%{
		                type: "image",
		                originalContentUrl: original_url,
		                previewImageUrl: preview_url
		             }]
  end

  def video(messages \\ [],
    %{original_content_url: original_url, preview_image_url: preview_url}) do
    messages ++ [%{
		                type: "video",
		                originalContentUrl: original_url,
		                previewImageUrl: preview_url
		             }]
  end

  def audio(messages \\ [],
    %{original_content_url: original_url, duration: duration}) do
    messages ++ [%{
		                type: "audio",
		                originalContentUrl: original_url,
		                duration: duration
		             }]
  end

  def location(messages \\ [],
    %{title: title, address: address,
      latitude: latitude, longitude: longitude}) do
    messages ++ [%{
		                type: "location",
		                title: title,
		                address: address,
		                latitude: latitude,
		                longitude: longitude
		             }]
  end

  def sticker(messages \\ [],
    %{package_id: package_id, sticker_id: sticker_id}) do
    messages ++ [%{
		                type: "sticker",
		                packageId: package_id,
		                stickerId: sticker_id
	               }]
  end

  def imagemap(messages \\ [],
    %{base_url: base_url, alt_text: alt_text,
      base_size: %{height: base_height, width: base_width},
      actions: actions})
  when is_list(actions) do
    messages ++ [%{
		                type: "imagemap",
		                baseUrl: base_url,
		                altText: alt_text,
		                baseSize: %{
		                  height: base_height,
		                  width: base_width
		                },
		                actions: parse_imagemap_actions(actions)
		             }]
  end

  defp parse_imagemap_actions(actions) do
    actions
    |> Enum.map(fn %{type: type, link_url: link_url,
                      area: %{x: x, y: y, width: width, height: height}} ->
        %{type: type, linkUrl: link_url,
          area: %{x: x, y: y, width: width, height: height}}
    end)
  end

  defmodule Template do
    def button(alt_text, content = %{image: _, title: _, text: _, actions: _}) do
      button([], alt_text, content)
    end
    def button(messages, alt_text, %{image: image, title: title, text: text, actions: actions}) do
      template(messages, alt_text, %{
	          type: "buttons",
	          thumbnailImageUrl: image,
	          title: title,
	          text: text,
	          actions: actions
	             })
    end

    def confirm(alt_text, content = %{text: _, actions: _}) do
      confirm([], alt_text, content)
    end
    def confirm(messages, alt_text, %{text: text, actions: actions}) do
      template(messages, alt_text, %{
	          type: "confirm",
	          text: text,
	          actions: actions
	             })
    end

    defp template(messages, alt_text, temp) do
      messages ++ [%{
		                  type: "template",
		                  altText: alt_text,
		                  template: temp
		               }]      
    end
  end
  
end