require "scrivener"
require "requests"

require_relative "shareprogress/filters/new_button"
require_relative "shareprogress/filters/new_email_variants"
require_relative "shareprogress/filters/new_twitter_variants"
require_relative "shareprogress/filters/new_facebook_variants"

module ShareProgress
  module Button
    def self.request(method, payload)
      case method
      when "create"
        url = "https://run.shareprogress.org/api/v1/buttons/update"
      when "update"
        # ...
      end

      response = Requests.request("POST", url,
        data: JSON.dump(payload),
        headers: { "Content-Type" => "application/json" }
      )

      return JSON.parse(response.body)
    end

    def self.create(data)
      # Validates the input (a hash) to send a POST request to
      # ShareProgress to create a share button. The result could be:
      # a) A hash containing the information of the created button or,
      # b) An Error message from ShareProgress (i.e. 'Bad API key').

      # Arguments received:
      # data: A hash containing all the info about the button. For example:
      # {
      #   "key" => "123456",
      #   "page_url" => "http://sumofus.org/",
      #   "page_title" => "My button name",
      #   "auto_fill" => true,
      #   "button_template" => "sp_em_large",
      #   "variants" => {
      #     "email" => [
      #       {"email_subject" => "Email subject 1!",
      #         "email_body" => "Email body 1 {LINK}"},
      #       {"email_subject" => "Email subject 2!",
      #         "email_body" => "Email body 2 {LINK}"},
      #       {"email_subject" => "Email subject 3!",
      #         "email_body" => "Email body 3 {LINK}"}
      #       ]
      #     },
      #   "advanced_options" => {
      #     "automatic_traffic_routing" => true,
      #     "buttons_optimize_actions" => true,
      #     "customize_params" => {
      #       "param" => "param_to_use",
      #       "e" => "email_source",
      #       "f" => "facebook_source",
      #       "t" => "twitter_source",
      #       "o" => "dark_social_source"
      #     },
      #     "id_pass" => {
      #     "id" => "id",
      #     "passed" => "referrer_id"
      #     }
      #   }
      # }

      # Example of a successful response:
      # {
      #   "id"=>12136,
      #   "page_url"=>"http://sumofus.org/",
      #   "page_title"=>"My button name",
      #   "button_template"=>"sp_em_large",
      #   "share_button_html"=>"<div class='sp_12136 sp_em_large' ></div>",
      #   "found_snippet"=>false,
      #   "is_active"=>false,
      #   "variants"=>{
      #     "facebook"=>[{
      #       "id"=>48542,
      #         "facebook_title"=>"SumOfUs",
      #         "facebook_description"=>"SumOfUs is a global movement of "\
      #         "consumers, investors, and workers all around the world, "\
      #         "standing together to hold corporations accountable for their "\
      #         "actions and forge a new, sustainable and just path for our "\
      #         "global economy. It's not going to be fast or easy. B",
      #         "facebook_thumbnail"=>"http://sumofus.org/wp-content/themes/pgm/"\
      #         "img/default-facebook.jpg"}],
      #     "email"=>[{
      #       "id"=>48539,
      #         "email_subject"=>"Email subject 1!",
      #         "email_body"=>"Email body 1 {LINK}"}, {
      #       "id"=>48540,
      #         "email_subject"=>"Email subject 2!",
      #         "email_body"=>"Email body 2 {LINK}"}, {
      #       "id"=>48541,
      #         "email_subject"=>"Email subject 3!",
      #         "email_body"=>"Email body 3 {LINK}"}],
      #     "twitter"=>[{
      #       "id"=>48543,
      #       "twitter_message"=>"SumOfUs {LINK}"}]},
      #   "advanced_options"=>{
      #     "automatic_traffic_routing"=>true,
      #     "buttons_optimize_actions"=>true,
      #     "customize_params"=>{
      #       "param"=>"param_to_use",
      #       "e"=>"email_source",
      #       "f"=>"facebook_source",
      #       "t"=>"twitter_source",
      #       "o"=>"dark_social_source"},
      #     "id_pass"=>{
      #       "id"=>"id",
      #       "passed"=>"referrer_id"}}
      # }
      button = NewButton.new(data)

      unless button.valid?
        return button.errors
      end

      button_variants = button.variants.merge(button_template: button.button_template)

      if button.variants["email"]
        variants = NewEmailVariants.new(button_variants)
      elsif button.variants["twitter"]
        variants = NewTwitterVariants.new(button_variants)
      elsif button.variants["facebook"]
        variants = NewFacebookVariants.new(button_variants)
      end

      unless variants.valid?
        return variants.errors
      end

      # send request to ShareProgress to create a button
      begin
        request = request("create", button.attributes)
        return request["response"][0]
      rescue Requests::Error => e
        return JSON.parse(e.response.body)["message"]
      end
    end
  end
end