defmodule ElixirWeather.Parsers do
    
    defmodule WeatherDotCom do        
        import Floki

        @location_name_getter "h1.h4.today_nowcard-location"
        @day_part_section_getter ".today-daypart"
        @title_getter ".today-daypart-title"
        @conditions_getter ".today-daypart-wxphrase"
        @high_low_getter ".today-daypart-hilo"
        @temp_getter ".today-daypart-temp"
        @percipitation_getter ".today-daypart-precip"

        # return error
        def get_todays_weather(html) when html == [] do
            {
                :error,
                %{
                    :todays_list => [], 
                    :location_name => "Unable to get location"
                }
            }
        end

        # return results
        def get_todays_weather(html) do
            location_name = find(html, @location_name_getter) |> text
            day_part = find(html, @day_part_section_getter)
            todays_list = Enum.map(day_part, fn(dp) -> parse_todays_weather(dp) end)

            { 
                :ok,
                %{
                    :todays_list => todays_list, 
                    :location_name => location_name 
                }
            }
        end

        defp parse_todays_weather(dp) do  
            title = find(dp, @title_getter) |> text
            conditions = find(dp, @conditions_getter) |> text
            low_high = find(dp, @high_low_getter) |> text
            temp = find(dp, @temp_getter) |> text
            perc = find(dp, @percipitation_getter) |> text

            %{
                :title => title,
                :conditions => conditions,
                :low_high => low_high,
                :temp => temp,
                :percipitation => "Percipitation #{perc}"
            }
        end
    end
end