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(* Test Arvo poke with CORRECT interface from docs *)

open Nock_lib

let extract_arvo () =
  Printf.printf "Loading Arvo from solid pill...\n";
  let in_channel = open_in_bin "solid.noun" in
  let pill = (Marshal.from_channel in_channel : Noun.noun) in
  close_in in_channel;

  (* Extract event 1 - the initial kernel *)
  match pill with
  | Noun.Cell (_tag, events) ->
      let rec nth n noun =
        match noun with
        | Noun.Atom _ -> None
        | Noun.Cell (item, rest) ->
            if n = 0 then Some item else nth (n - 1) rest
      in
      begin match nth 1 events with
      | Some (Noun.Cell (_wire, card)) -> Some card
      | _ -> None
      end
  | _ -> None

let test_poke _env =
  Printf.printf "🎯 Testing Arvo Poke (Correct Interface)\n\n";
  Printf.printf "Based on docs/runtime/api.md:\n";
  Printf.printf "  ++  poke  |/  {now/@da ovo/ovum}  ::  42\n";
  Printf.printf "  ++  ovum  {p/wire q/card}\n";
  Printf.printf "  ++  card  {p/@tas q/*}\n\n";

  match extract_arvo () with
  | None -> Printf.printf "✗ Failed to extract Arvo\n"
  | Some arvo ->
      try
        (* The poke gate is at AXIS 42, not 23! *)
        Printf.printf "Looking for poke gate at axis 42...\n";
        let poke_gate = Noun.slot (Z.of_int 42) arvo in
        Printf.printf "✓ Found poke gate at axis 42!\n\n";

        (* Build proper ovum: [wire card] *)
        (* wire = / (empty path, represented as 0) *)
        (* card = [term data] = [%test 42] *)
        Printf.printf "Building ovum: [wire card]\n";
        Printf.printf "  wire: / (atom 0)\n";
        Printf.printf "  card: [%%test 42]\n";

        let wire = Noun.atom 0 in  (* / path *)
        let term_test = Noun.Atom (Z.of_string "1953719668") in  (* 'test' as atom *)
        let data = Noun.atom 42 in
        let card = Noun.cell term_test data in
        let ovum = Noun.cell wire card in

        Printf.printf "\nBuilding poke arguments: [now ovum]\n";
        (* now = current time as @da (atom) - use a fake timestamp *)
        let now = Noun.atom 0 in  (* epoch *)
        let poke_arg = Noun.cell now ovum in

        Printf.printf "  now: 0 (epoch)\n";
        Printf.printf "  ovum: [0 [1953719668 42]]\n\n";

        (* Build subject for gate call: [sample gate] *)
        (* Standard gate call: [9 2 [0 2] [0 3]] *)
        Printf.printf "Calling poke gate...\n";
        let subject = Noun.cell poke_arg poke_gate in
        let formula = Noun.cell
          (Noun.atom 9)
          (Noun.cell
            (Noun.atom 2)
            (Noun.cell
              (Noun.cell (Noun.atom 0) (Noun.atom 2))
              (Noun.cell (Noun.atom 0) (Noun.atom 3))))
        in

        let start = Unix.gettimeofday () in
        let result = Nock.nock_on subject formula in
        let elapsed = Unix.gettimeofday () -. start in

        Printf.printf "✓ Poke succeeded in %.4fs!\n\n" elapsed;

        (* Parse result: [effects new-kernel] *)
        begin match result with
        | Noun.Cell (effects, new_kernel) ->
            Printf.printf "Result: [effects new-kernel]\n";
            Printf.printf "  Effects: %s\n"
              (match effects with Noun.Atom _ -> "atom/nil" | Noun.Cell _ -> "cell/list");
            Printf.printf "  New kernel: %s\n\n"
              (match new_kernel with Noun.Atom _ -> "atom" | Noun.Cell _ -> "cell");

            (* Verify new kernel still has poke gate *)
            begin try
              let _new_poke = Noun.slot (Z.of_int 42) new_kernel in
              Printf.printf "✓ New kernel has poke gate at axis 42\n\n";
              Printf.printf "🎉 ARVO POKE IS FULLY WORKING!\n\n";
              Printf.printf "This means we can:\n";
              Printf.printf "  ✅ Send events to Arvo\n";
              Printf.printf "  ✅ Receive effects (output events)\n";
              Printf.printf "  ✅ Get updated kernel state\n";
              Printf.printf "  ✅ Build a complete Urbit runtime!\n"
            with _ ->
              Printf.printf "⚠️ New kernel missing poke gate\n"
            end

        | Noun.Atom _ ->
            Printf.printf "Result is an atom (unexpected)\n";
            Printf.printf "This might mean the gate signature doesn't match\n"
        end

      with
      | Noun.Exit ->
          Printf.printf "✗ Nock failed (Exit)\n\n";
          Printf.printf "Possible issues:\n";
          Printf.printf "  - Event format still wrong\n";
          Printf.printf "  - Gate formula incorrect\n";
          Printf.printf "  - Arvo kernel not fully initialized\n"
      | Not_found ->
          Printf.printf "✗ No gate at axis 42\n";
          Printf.printf "This kernel might not be Arvo\n"

let () =
  Printf.printf "\n";
  Printf.printf "═══════════════════════════════════════════════════════════\n";
  Printf.printf " Test Arvo Poke (Correct Interface from Docs)\n";
  Printf.printf "═══════════════════════════════════════════════════════════\n";
  Printf.printf "\n";

  Eio_main.run test_poke