-- P3 stress: пустой каталог, 40 строк и явный маркер предела DSS.

local KB = ":kbd:ms_naturl:"
local HOLD = 0.06
local events = {}

local function add(t, tag, mask, value)
  events[#events + 1] = {t, KB .. tag, mask, value}
end

local function key(t, tag, mask)
  add(t, tag, mask, 1)
  add(t + HOLD, tag, mask, 0)
end

local function chord(t, mod_tag, mod_mask, key_tag, key_mask)
  add(t, mod_tag, mod_mask, 1)
  add(t + 0.02, key_tag, key_mask, 1)
  add(t + 0.08, key_tag, key_mask, 0)
  add(t + 0.10, mod_tag, mod_mask, 0)
end

local chars = {
  c={"P1.4",0x08}, d={"P1.4",0x04},
  e={"P1.4",0x20}, m={"P2.0",0x10}, p={"P2.3",0x20},
  r={"P1.5",0x01}, s={"P1.2",0x08}, x={"P1.2",0x10},
  [" "]={"P2.4",0x80}, ["."]={"P2.2",0x10},
  ["\\"]={"P2.1",0x04}, ["\n"]={"P2.1",0x10},
  [":"]={"P2.3",0x02,true}
}

local function type_text(t, value)
  for i = 1, #value do
    local ch = value:sub(i, i)
    local def = chars[ch]
    local shifted = false
    if not def then
      local lower = ch:lower()
      def = chars[lower]
      shifted = ch ~= lower
    else
      shifted = def[3] or false
    end
    if shifted then
      chord(t, "P1.7", 0x02, def[1], def[2])
    else
      key(t, def[1], def[2])
    end
    t = t + 0.14
  end
end

type_text(8.0, "d:\n")
type_text(9.0, "SPRCMD  .EXE\n")

-- Root order: BIGDIR, EMPTY, MANY, TESTDIR, P3ROOT, SPRCMD, ZETA.
key(17.0, "P2.3", 0x10)                 -- EMPTY.
key(18.0, "P2.1", 0x10)                 -- Enter EMPTY.
key(24.0, "P2.1", 0x10)                 -- Enter `..`.
key(27.0, "P2.3", 0x10)                 -- EMPTY.
key(28.0, "P2.3", 0x10)                 -- MANY.
key(29.0, "P2.1", 0x10)                 -- Enter MANY.
key(36.0, "P1.2", 0x20)                 -- PgDn -> cursor 27/top 1.
key(38.0, "P2.3", 0x10)                 -- Down -> cursor 28/top 2.
chord(43.0, "P1.1", 0x02, "P1.2", 0x01) -- Ctrl+PgUp -> root.
key(46.0, "P2.1", 0x10)                 -- Enter BIGDIR (index 0).

-- BIGDIR scan может быть долгим; последующие события намеренно отнесены.
key(76.0, "P2.5", 0x20)                 -- End: красный `>>> MORE...`.
key(81.0, "P2.1", 0x10)                 -- Enter: пояснение, без перехода.
key(86.0, "P2.3", 0x80)                 -- F10.
key(90.0, "P2.1", 0x10)                 -- cleanup.

table.sort(events, function(a, b) return a[1] < b[1] end)

local snap_times = {
  15.0, -- root count=7, dirs before files;
  21.0, -- EMPTY: only synthetic `..`, count=1;
  32.0, -- MANY: count=41;
  40.0, -- real list cursor=28/top=2;
  73.0, -- BIGDIR: частичный список и признак усечения DSS;
  79.0, -- End: выбран красный виртуальный `>>> MORE...`;
  84.0, -- Enter: статус о недоступном остатке, каталог не меняется;
  88.0, -- quit dialog over intact screen;
  93.0  -- DSS after cleanup.
}
local snaps_done = {}
local start_time = nil
local ports = nil
local index = 1
local field_cache = {}

local function now()
  local t = manager.machine.time
  return t.seconds + t.attoseconds / 1e18
end

local function field(tag, mask)
  local cache_key = tag .. "/" .. mask
  if field_cache[cache_key] then return field_cache[cache_key] end
  for _, candidate in pairs(ports[tag].fields) do
    if candidate.mask == mask then
      field_cache[cache_key] = candidate
      return candidate
    end
  end
  error("Не найдено поле " .. cache_key)
end

emu.add_machine_reset_notifier(function()
  start_time = now()
end)

emu.register_periodic(function()
  if not start_time then return end
  if not ports then ports = manager.machine.ioport.ports end
  local elapsed = now() - start_time

  while index <= #events and elapsed >= events[index][1] do
    local event = events[index]
    field(event[2], event[3]):set_value(event[4])
    index = index + 1
  end

  for _, snap_time in ipairs(snap_times) do
    if not snaps_done[snap_time] and elapsed >= snap_time then
      snaps_done[snap_time] = true
      manager.machine.video:snapshot()
      print("[p3-stress] snapshot t=" .. elapsed)
    end
  end

  if elapsed >= 95.0 then
    print("[p3-stress] exit t=" .. elapsed)
    manager.machine:exit()
  end
end)