Heads-I-Lose

-module(headsilose).
-export([get_locations/0, get_locations/1, headsilose/1]).
-include_lib("xmerl/include/xmerl.hrl").
-import(weather_types, [weather_type/1]).
-import(polyline, [decode/1]).
-import(osrm, [read_route/1]).

%Supply a direction and location and work out if head wind or not
%For now "know the location id" upfront, but ideally need to search for it at some point or present a choice.

%Initially based on: http://pragdave.pragprog.com/pragdave/2007/04/a_first_erlang_.html

-define(BASE_URL,

		sidewind;
	Tailwind ->
		tailwind
	end.
%Something like that?
	

%First two for command line usage
headsilose([Location]) ->
	headsilose_(Location);
headsilose([Location, Route_choice]) ->
	headsilose_(Location, Route_choice).
headsilose_(Location) ->
	%If route choice not specified default to default!
	%The other choice is "alternative_geometries", for now I think there is only ever one alternative so pick this first.
	headsilose_(Location, "route_geometry").
headsilose_(Location, Route_choice) ->
	Date_today = erlang:localtime(),
	{ Date_formatted, Rep } = date_and_rep(Date_today),
	{Direction, Speed, Gust, Weather, Temperature} = get_weather(Location,  { Date_formatted, Rep }),
	Weather_type = weather_types:weather_type(erlang:list_to_integer(Weather)),
	[Headwinds, Sidewinds, Tailwinds] = build_list_of_wind_directions(Direction),
	{_Checksum, Polyline} = osrm:read_route(Route_choice),
	Polyline_decoded = polyline:decode(Polyline),
	Distances_and_headings_list = convert_lats_longs_to_distance_heading(Polyline_decoded),
	%A better representation than 360 or 1080 would be better now this is used here as well.
	Journey = if Rep =:= "360" ->
		journey(Distances_and_headings_list);
	Rep =:= "1080" ->
		reverse_journey(Distances_and_headings_list)

-module(osrm).
-export([get_route/1, get_route/2, read_route/1]).
-import(polyline, [decode/1]).

%https://github.com/Project-OSRM/osrm-backend/wiki/Server-api
%For now, get weather for one location (probably good enough as relatively short distances weather wise; ultimately consider time as well?)
%To get lats and longs could also do a query for here: http://www.uk-postcodes.com/ (json again)

-define(BASE_URL,

			io:format("API Might be down~n"),
			Reason
	after
		maybe_quit()
	end.


read_route(Route_choice) ->
	{_Status, Route} = file:read_file(os:getenv("HOME") ++ "/.headsilose_route"),
	%Use jiffy
	%http://www.snip2code.com/Snippet/51463/how-to-support-chinese-in-http-request-b/
	{ Props } = jiffy:decode(Route),
	Route_geometry = if Route_choice =:= "route_geometry" ->
		proplists:get_value(binary:list_to_bin(Route_choice), Props);
	Route_choice =:= "alternative_geometries" ->
		%hd only if alternative though!
		%for now I think there is only ever one alternative so that is why we pick hd
		hd(proplists:get_value(binary:list_to_bin(Route_choice), Props))
	end,
	%That is all for now? Because...
	%And these don't seem to actually be returned, hence having to go down the route of polyline decoding
	%Route_Instructions = proplists:get_value(<<"route_instructions">>, Props),
	%Total_Distance = proplists:get_value(<<"total_distance">>, proplists:get_value(<<"route_summary">>, Props)),
	%And need to figure out how to get nested values. I.e like xpath. Just nest the queries? Nope that doesn't work
	%Like so:
	{Hint_data} = proplists:get_value(<<"hint_data">>, Props),