-- 0.2/P11: F8 cancel, file, empty/nonempty directory и guards.

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},
  l={"P2.2",0x08}, m={"P2.0",0x10}, n={"P2.0",0x08},
  p={"P2.3",0x20}, r={"P1.5",0x01}, s={"P1.2",0x08},
  t={"P1.5",0x20}, x={"P1.2",0x10}, ["."]={"P2.2",0x10},
  ["\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] or chars[ch:lower()]
    local shifted = def[3] or ch ~= ch:lower()
    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, "DELRT.EXE\n")
type_text(12.0, "SPRCMD.EXE\n")

key(18.0, "P2.1", 0x10) -- enter DELTEST.
key(20.0, "P2.3", 0x10) -- Down x4 -> REMOVE.TXT.
key(20.5, "P2.3", 0x10)
key(21.0, "P2.3", 0x10)
key(21.5, "P2.3", 0x10)
key(23.0, "P2.2", 0x80) -- F8 file, then cancel.
key(25.0, "P2.0", 0x08) -- N.

key(28.0, "P2.2", 0x80) -- F8 file, confirm.
key(30.0, "P2.1", 0x10)

key(34.0, "P2.3", 0x10) -- EMPTYDIR.
key(35.0, "P2.2", 0x80)
key(37.0, "P2.1", 0x10)

key(40.0, "P2.3", 0x10) -- NONEMPTY.
key(41.0, "P2.2", 0x80)
key(43.0, "P2.1", 0x10)

key(46.0, "P2.5", 0x01) -- Home -> `..`.
key(47.0, "P2.2", 0x80) -- virtual guard.
key(50.0, "P2.3", 0x10) -- NONEMPTY.
key(51.0, "P2.6", 0x01) -- select dir, cursor -> KEEP.
key(52.0, "P2.2", 0x80) -- group ambiguity guard.

key(56.0, "P2.3", 0x80) -- F10.
key(58.0, "P2.1", 0x10)

table.sort(events, function(left, right) return left[1] < right[1] end)

local snap_times = {
  19.0, -- target probe left UI fixture intact;
  23.5, -- file confirmation;
  26.0, -- cancel preserved REMOVE.TXT;
  32.0, -- file deleted;
  39.0, -- empty directory deleted;
  45.0, -- nonempty directory rejected;
  48.0, -- virtual `..` rejected;
  53.0, -- ambiguous group rejected;
  60.0  -- clean DSS prompt.
}
local snaps_done = {}
local start_time = nil
local ports = nil
local index = 1
local field_cache = {}

local function now()
  local value = manager.machine.time
  return value.seconds + value.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("[p11-delete] snapshot t=" .. elapsed)
    end
  end

  if elapsed >= 62.0 then
    print("[p11-delete] exit t=" .. elapsed)
    manager.machine:exit()
  end
end)