module Pointy

# File lib/pointy.rb, line 71
def self.route(from, to, opts={})
  Pointy.route_coordinates(from, to, opts)
end

# File lib/pointy.rb, line 56
def self.route_coordinates(from, to, opts={})
  polylines = Pointy.route_polylines(from, to, opts)
  return if polylines.nil?

  polylines.inject([]) do |all_points, polyline|
    decoded_poly = Polylines::Decoder.decode_polyline(polyline)
    all_points += decoded_poly.map do |coord|
      {
        lat: coord.first,
        long: coord.last
      }
    end
  end
end

# File lib/pointy.rb, line 18
def self.route_polylines(from, to, opts={})
  return if default_params[:key].nil? and opts[:key].nil?

  # Format points for Google API
  opts.merge!({
    origin: "#{from[:lat]},#{from[:long]}",
    destination: "#{to[:lat]},#{to[:long]}"
  })

  response = get('/directions/json', query: opts)

  # Check there are routes
  routes = response['routes']
  return if routes.nil? or routes.empty?

  # Gather all route points
  route = routes.first
  legs = route['legs']
  return if legs.nil? or legs.empty?

  # Accumulate all points
  legs.inject([]) do |polylines, leg|
    steps = leg['steps']
    if !steps.nil? and !steps.empty?
      steps.each_with_index do |step, index|
        polylines << step['polyline']['points']
      end
    end

    polylines
  end
end