#!/usr/bin/env julia

import CSV
using Formatting

function parse_csv(filename)
    println("Starting parsing")
    data = CSV.read(filename, header=0)
    println("Parsing done")
    plaintexts::Matrix{UInt8} = convert(Matrix{UInt8}, data[:, 1:16])
    timings::Matrix{UInt32} = convert(Matrix{UInt32}, data[:, 17:17])
    write_data("plaintexts.dat", plaintexts)
    write_data("timings.dat", timings)
end

function write_data(destination, data)
    open(destination, "w") do file
        field_size::UInt8 = sizeof(eltype(data))
        rows::UInt64 = size(data, 1)
        cols::UInt64 = size(data, 2)
        write(file, field_size);
        write(file, rows)
        write(file, cols)
        write(file, data)
    end
end

function load_file(filename, type::Type{T})::Matrix{T} where T
    open(filename, "r") do file
        field_size = read(file, UInt8)
        if field_size != sizeof(T)
            throw(ArgumentError(format("Expected type of size {:d} but passed type '{}' has size {:d}", field_size, T, sizeof(T))))
        end
        rows = read(file, UInt64)
        cols = read(file, UInt64)
        data = Matrix{T}(undef, rows, cols)
        read!(file, data)
        return data
    end
end

@time parse_csv("timing.csv")