#!/usr/bin/env julia

using Test

function elf_max_calories(infile)
  max_calories = zeros(Int64, 3)
  elf_calories = 0

  open(infile, "r") do io
    for line in eachline(io)
      if length(line) == 0
        if elf_calories > max_calories[1]
          max_calories[1] = elf_calories
          sort!(max_calories)
        end
        elf_calories = 0
        continue
      end
      snack_calories = parse(Int64, line)
      elf_calories += snack_calories
    end
    if elf_calories > max_calories[1]
      max_calories[1] = elf_calories
      sort!(max_calories)
    end
  end

  return (max_calories[end], sum(max_calories))
end

function test()
  @testset "elf snacks" verbose=true begin
    @test elf_max_calories("example.txt") == (24000, 45000)
    @test elf_max_calories("input.txt") == (69206, 197400)
  end
end

function main()
  if size(ARGS, 1) == 0
    test()
  else
    infile = ARGS[1]
    println("infile = ", infile)
    println("snack calories: ", elf_max_calories(infile))
  end
end

main()