class CraftyClicks

# File lib/crafty_clicks.rb, line 8
def initialize(key:, env: :test)
  # Only set the auth key if in production (to avoid unwanted charges)
  @env = env
  @key = @env == :production ? key : nil
end

# File lib/crafty_clicks.rb, line 14
def lookup_postcode(postcode)
  addresses(lookup_postcode_cached(postcode))
end

# File lib/crafty_clicks.rb, line 20
def addresses(json)
  # Format the list of delivery points into a readable list
  address_list = json['delivery_points'].map do |delivery_point|
    address = ""
    address += delivery_point['line_1'] unless delivery_point['line_1']. == ""
    address += " #{delivery_point['line_2']}" unless delivery_point['line_2']. == ""

    address
  end.sort do |a1, a2|
    # Sort by house number where possible
    a1.match(/^[0-9]+/).try(:[], 0).to_i <=>
    a2.match(/^[0-9]+/).try(:[], 0).to_i
  end

  {
    addresses: address_list,
    town: json['town'],
    postcode: json['postcode']
  }
end

# File lib/crafty_clicks.rb, line 51
def lookup_postcode_cached(postcode)
  # Automatically use the rails cache if it's available
  if defined? Rails
    key = ['craftyclicks', @env, postcode.tr(' ','').upcase]
    if cached = Rails.cache.fetch(key)
      return cached
    else
      json = lookup_postcode_uncached(postcode)
      Rails.cache.write key, json
      return json
    end
  else
    return lookup_postcode_uncached(postcode)
  end
end

# File lib/crafty_clicks.rb, line 41
def lookup_postcode_uncached(postcode)
  form_hash = { postcode: postcode, response: 'data_formatted'}
  form_hash.merge!({ key: @key }) if @key
  uri = URI(RAPID_URL)
  uri.query = URI.encode_www_form(form_hash)
  
  response = Net::HTTP.get_response(uri)
  JSON.parse(response.body)
end