require 'digest'

module Bookends
  module ApplicationHelper
    def relative_search_path
      '/search'
    end

    def search_disabled?
      false
    end

    def header_search_input
      tag 'input',
        type: 'text',
        spellcheck: 'false',
        autocomplete: 'off',
        name: 'q',
        title: 'search'
    end

    def logged_in?
      !!cookies[:heroku_session]
    end

    def glostick_user_name
      glostick_user['full_name']
    end

    def glostick_user_email
      glostick_user['email']
    end

    def glostick_user_id
      glostick_user['id']
    end

    # Available options:
    # - class: classes to be set in the class HTML attribute
    # - redirect_url: will be inserted as a redirect-url param in the signup URL
    # - signup_path: will be appended to the signup URL (e.g: signup_path "ruby" will generate a link to signup.h.c/ruby)
    def signup_link(title, ga_label: nil, **options)
      url = 'https://signup.heroku.com'
      url += "/#{options[:signup_path]}" if options[:signup_path]

      if options[:redirect_url]
        params = { 'redirect-url' => options[:redirect_url] }
        url << "?#{params.to_query}"
      end

      data = { trackable: { category: 'Sign Up Links', action: 'Clicked', label: ga_label } }
      link_to title, url, class: options[:class], data: data
    end

    def hero_class
      #to be overriden by consumers, optionally
    end

    def avatar_url(email)
      default_avatar_url = 'https://www.herokucdn.com/images/ninja-avatar-48x48.png'
      return default_avatar_url unless email

      gravatar_url = 'https://gravatar.com/avatar'
      hashed_email = Digest::MD5.hexdigest(email)
      size = 48

      "#{gravatar_url}/#{hashed_email}?s=#{size}&d=#{default_avatar_url}"
    end

    def link_to_new_window(text, link, options = {})
      words = text.split(' ')
      link_to(
        link, {
          aria: { label: "#{text} (Opens in new window)" },
          target: '_blank'
        }.merge!(options)
      ) do
        concat(words[0..-2].join(' '))
        concat(' ')
        concat(content_tag(:span, class: 'new-window-icon') do
          words[-1]
        end)
      end
    end

    private

    def glostick_user
      @glostick_user ||= Bookends::GlostickUserExtractor.new(cookies, session_cookie_secret).user
    end

    def session_cookie_secret
      ENV['SESSION_COOKIE_SECRET_PRIMARY'] || ENV['SESSION_COOKIE_SECRET_SECONDARY']
    end
  end
end