fun time_func title f =
  let
    val title = String.concat ["Starting " , title , "..."]
    val _ = (print title)
    val start_time = Time.now()
    val start_time = Time.toNanoseconds start_time
    val x = f()
    val end_time = Time.now()
    val end_time = Time.toNanoseconds end_time
    val time_diff = end_time - start_time 
    val time_diff = LargeInt.toString time_diff
    val time_took = String.concat ["took ", time_diff, " nanoseconds\n"]
    val _ = (print time_took)
  in
    x
  end

fun run_txns arr =
  Vector.foldl 
    (fn ((pos, del_num, ins_str), rope) =>
      let
        val rope = 
          if del_num > 0 
          then delete pos del_num rope 
          else rope
        val str_size = String.size ins_str
        val rope = 
          if str_size > 0 
          then insert pos ins_str rope 
          else rope
      in
        rope
      end) 
    empty arr

fun run_txns_time title arr = 
  let
    val f = (fn () => run_txns arr)
  in
    time_func title f
  end

fun run_to_string rope =
  to_string rope

fun run_to_string_time title rope =
  let
    val f = (fn () => run_to_string rope)
  in
    time_func title f
  end

fun run_txns_1000_times counter arr acc =
  if counter = 1000 then
    acc
  else
    let
      val start_time = Time.now()
      val start_time = Time.toMilliseconds start_time

      val _ = run_txns arr

      val end_time = Time.now()
      val end_time = Time.toMilliseconds end_time
      val time_diff = end_time - start_time 
      val time_diff = LargeInt.toString time_diff
    in
      run_txns_1000_times (counter + 1) arr (time_diff::acc)
    end

fun write_file filename acc =
  let 
    val str = String.concatWith "," acc
    val fd = TextIO.openOut filename
    val _ = TextIO.output (fd, str) handle e => (TextIO.closeOut fd; raise e)
    val _ = TextIO.closeOut fd
  in
    ()
  end

val _ =
  let
    val svelte = run_txns_1000_times 0 svelte_arr []
    val _ = write_file "svelte_edit_traces.csv" svelte

    val rust = run_txns_1000_times 0 rust_arr []
    val _ = write_file "rust_edit_traces.csv" rust

    val seph = run_txns_1000_times 0 seph_arr []
    val _ = write_file "seph_edit_traces.csv" seph

    val automerge = run_txns_1000_times 0 automerge_arr []
    val _ = write_file "automerge_edit_traces.csv" automerge
  in
    ()
  end