using IntCode

function part1(input::AbstractString)
    robot = Computer(input)
    dir, pos = im, 0im
    colors = Dict{typeof(pos), Int}()
    while robot.halt == false
        paint, turn = robot(get!(colors, pos, 0))
        dir = turn == 0 ? dir * im : dir * -im
        colors[pos] = paint
        pos += dir
    end
    return length(colors)
end

function part2(input::AbstractString)
    robot = Computer(input)
    dir, pos = im, 0im
    colors = Dict{typeof(pos), Int}()
    colors[0] = 1
    while robot.halt == false
        paint, turn = robot(get!(colors, pos, 0))
        colors[pos] = paint
        dir = turn == 0 ? dir * im : dir * -im
        pos += dir
    end
    xmin, xmax = extrema(real.(keys(colors)))
    ymin, ymax = extrema(imag.(keys(colors)))
    for y ∈ ymax:-1:ymin
        println(join(get(colors, complex(x, y), 0) == 1 ? '█' : ' ' for x ∈ xmin:xmax))
    end
end

input = read("input_11.txt", String)
println("Part 1: ", part1(input))
println("Part 2: ")
part2(input)