using Pkg
Pkg.add("Match")
using Match

include("utils.jl")

function solution2_1()
    input_lines = non_empty_lines("2.data")

    function parse_line(line)
        (command, amount) = split(line, " ")
        parsed_amount = parse(Int, amount)
    end

    map(fline->split(line, " "), input_lines)

    x = 0
    y = 0

    for line in input_lines
        (command, amount) = split(line, " ")
        parsed_amount = parse(Int, amount)
        @match command begin
            "forward" => begin x += parsed_amount end
            "up" => begin y -= parsed_amount end
            "down" => begin y += parsed_amount end
        end
    end
    (x, y, x*y)
end

function solution2_2()
    input_lines = non_empty_lines("2.data")

    aim = 0
    x = 0
    y = 0

    for line in input_lines
        (command, amount) = split(line, " ")
        parsed_amount = parse(Int, amount)
        @match command begin
            "forward" => begin x += parsed_amount; y += parsed_amount * aim end
            "up" => begin aim -= parsed_amount end
            "down" => begin aim += parsed_amount end
        end
    end
    (x, y, x*y)
end

(solution2_1(), solution2_2())