-- Copyright (C) 2018-2021 by KittenOS NEO contributors
--
-- Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.
--
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-- THIS SOFTWARE.

-- app-tapedeck.lua : Computronics Tape interface.
-- Added note: Computerized record discs aren't available, so it can't be called vinylscratch.
-- Authors: 20kdc

local tapeRate = 4096

local tapeAccess = neo.requireAccess("c.tape_drive", "tapedrives")

local event = require("event")(neo)
local neoux = require("neoux")(event, neo)

-- There's no way to get these, so they get reset
local pcvals = {vol = 100, spd = 100}
local function pcbox(x, y, low, high, id, fun)
 return neoux.tcfield(x, y, 5, function (tx)
  if tx then
   pcvals[id] = math.min(math.max(0, math.floor(tonumber(tx) or 0)), high)
   fun(math.max(pcvals[id], low) / 100)
  end
  return tostring(pcvals[id])
 end)
end

local window
local running = true
local focused = true

local updateTick

local downloadCancelled = false

local genPlayer, genList -- used to return to player

local function genDownloading(downloadText, inst)
 downloadCancelled = false
 local lclLabelText = {downloadText}
 local lclLabel = neoux.tcrawview(1, 1, lclLabelText)
 local thr = {
  "/",
  "-",
  "\\",
  "|"
 }
 local thri = 0
 updateTick = function ()
  lclLabelText[1] = downloadText .. " " .. (inst.getPosition() / (1024 * 1024)) .. "MB " .. thr[(thri % #thr) + 1]
  thri = thri + 1
  lclLabel.update(window)
 end
 return 40, 1, nil, neoux.tcwindow(40, 1, {
  lclLabel
 }, function (w)
  downloadCancelled = true
 end, 0xFFFFFF, 0)
end

local function maybeSleep()
 if math.random() > 0.98 then
  event.sleepTo(os.uptime() + 0.05)
 end
end

local function doINetThing(inet, url, inst)
 inet = inet.list()()
 assert(inet, "No available card")
 inst.stop()
 inst.seek(-inst.getSize())
 window.reset(genDownloading("downloading...", inst))
 local req = assert(inet.request(url))
 req.finishConnect()
 local tapePos = 0
 local tapeSize = inst.getSize()
 while (not downloadCancelled) and tapePos < tapeSize do
  local n, n2 = req.read(neo.readBufSize)
  if not n then
   if n2 then
    req.close()
    error(n2)
   end
   break
  elseif n == "" then
   event.sleepTo(os.uptime() + 0.05)
  else
   inst.write(n)
   tapePos = tapePos + #n
  end
 end
 req.close()
 inst.seek(-inst.getSize())
end

local function genWeb(inst)
 updateTick = nil
 local url = ""
 local lockout = false
 return 40, 3, nil, neoux.tcwindow(40, 3, {
  neoux.tcrawview(1, 1, {"URL to write to tape?"}),
  neoux.tcfield(1, 2, 40, function (t)
   url = t or url
   return url
  end),
  neoux.tcbutton(1, 3, "Download & Write", function (w)
   lockout = true
   local inet = neo.requestAccess("c.internet")
   lockout = false
   if inet then
    local ok, err = pcall(doINetThing, inet, url, inst)
    if not ok then
     neoux.startDialog("Couldn't download: " .. tostring(err), "error")
    end
   end
   w.reset(genPlayer(inst))
  end)
 }, function (w)
  w.reset(genPlayer(inst))
 end, 0xFFFFFF, 0)
end

-- The actual main UI --
genPlayer = function (inst)
 local cachedLabel = inst.getLabel() or ""
 local cachedState = inst.getState()
 local function pausePlay()
  if inst.getState() == "PLAYING" then
   inst.stop()
  else
   inst.play()
  end
  window.reset(genPlayer(inst))
 end
 -- Common code for reading/writing tapes.
 local function rwButton(mode)
  local fh = neoux.fileDialog(mode)
  if not fh then return end
  inst.stop()
  local tapeSize = inst.getSize()
  inst.seek(-tapeSize)
  local tapePos = 0
  window.reset(genDownloading("working...", inst))
  while tapePos < tapeSize and not downloadCancelled do
   if mode then
    local data = inst.read(neo.readBufSize)
    if not data then break end
    tapePos = tapePos + #data
    local res, ifo = fh.write(data)
    if not res then
     neoux.startDialog(tostring(ifo), "issue")
     break
    end
   else
    local data = fh.read(neo.readBufSize)
    if not data then break end
    tapePos = tapePos + #data
    inst.write(data)
   end
   maybeSleep()
  end
  inst.seek(-tapeSize)
  fh.close()
  window.reset(genPlayer(inst))
 end
 local elems = {
  neoux.tcrawview(1, 1, {
   "Label:"
  }),
  neoux.tcfield(7, 1, 34, function (tx)
   if tx then
    inst.setLabel(tx)
    cachedLabel = tx
   end
   return cachedLabel
  end),
  {
   x = 1,
   y = 5,
   w = 40,
   h = 1,
   selectable = true,
   line = function (w, x, y, lined, bg, fg, selected)
    local lx = ""
    local pos = inst.getPosition()
    local sz = inst.getSize()
    if inst.isReady() then
     -- Show a bar
     local tick = sz / 23
     for i = 1, 23 do
      local alpos = (tick * i) - (tick / 2)
      if pos > alpos then
       lx = lx .. "="
      else
       lx = lx .. "-"
      end
     end
    else
     lx = "NO TAPE HERE."
    end
    local sec = pos / tapeRate
    local secz = sz / tapeRate
    lx = lx .. string.format(" %03i:%02i / %03i:%02i ",
     math.floor(sec / 60), math.floor(sec) % 60,
     math.floor(secz / 60), math.floor(secz) % 60)
    if selected then bg, fg = fg, bg end
    window.span(x, y, lx, bg, fg)
   end,
   key = function (w, update, a, b, c, kf)
    local amount = tapeRate * 10
    if kf.shift or kf.rshift then
     amount = amount * 24
    end
    if c then
     if a == 32 then
      pausePlay()
     elseif b == 203 then
      inst.seek(-amount)
      update()
      return true
     elseif b == 205 then
      inst.seek(amount)
      update()
      return true
     end
    end
   end
  },
  neoux.tcrawview(33, 3, {
   "% Volume"
  }),
  neoux.tcrawview(20, 3, {
   "% Speed"
  }),
  pcbox(15, 3, 25, 200, "spd", inst.setSpeed),
  pcbox(28, 3, 0, 100, "vol", inst.setVolume),
  neoux.tcrawview(1, 4, {
   "Seeker: use ◃/▹ (shift goes faster)"
  }),
  neoux.tcbutton(1, 3, "«", function (w)
   inst.seek(-inst.getSize())
  end),
  neoux.tcbutton(11, 3, "»", function (w)
   inst.seek(inst.getSize())
  end),
  neoux.tcbutton(4, 3, ((inst.getState() == "PLAYING") and "Pause") or "Play", function (w)
   pausePlay()
  end),
  -- R/W buttons
  neoux.tcbutton(1, 2, "Read", function (w)
   rwButton(true)
  end),
  neoux.tcbutton(7, 2, "Write", function (w)
   rwButton(false)
  end),
  neoux.tcbutton(14, 2, "Write Web", function (w)
   w.reset(genWeb(inst))
  end),
  neoux.tcbutton(25, 2, "Copy", function (w)
   w.reset(genList(function (inst2)
    local ts1 = inst.getSize()
    inst.stop()
    inst.seek(-ts1)
    local ts2 = inst2.getSize()
    inst2.stop()
    inst2.seek(-ts2)
    if ts1 < ts2 then
     w.reset(genDownloading("copying...", inst))
    else
     w.reset(genDownloading("copying...", inst2))
    end
    local pos = 0
    while pos < ts1 and pos < ts2 and not downloadCancelled do
     local dat = inst.read(neo.readBufSize)
     inst2.write(dat)
     pos = pos + #dat
     maybeSleep()
    end
    inst.seek(-ts1)
    inst2.seek(-ts2)
    inst2.setLabel((inst.getLabel() or "") .. " Copy")
    w.reset(genPlayer(inst))
   end))
  end),
  neoux.tcbutton(31, 2, "Erase", function (w)
   local ts1 = inst.getSize()
   inst.stop()
   inst.seek(-ts1)
   w.reset(genDownloading("erasing...", inst))
   local blank = ("\x00"):rep(neo.readBufSize)
   local pos = 0
   while pos < ts1 and not downloadCancelled do
    inst.write(blank)
    pos = pos + #blank
    maybeSleep()
   end
   inst.seek(-ts1)
   w.reset(genPlayer(inst))
  end)
 }
 updateTick = function ()
  local lcl = cachedLabel
  cachedLabel = inst.getLabel() or ""
  elems[3].update(window)
  if inst.getState() ~= cachedState then
   window.reset(genPlayer(inst))
  elseif lcl ~= cachedLabel then
   elems[2].update(window)
  end
 end
 local n = neoux.tcwindow(40, 5, elems, function (w)
  updateTick = nil
  running = false
  w.close()
 end, 0xFFFFFF, 0)
 return 40, 5, inst.address, function (a, ...)
  if a == "focus" then
   focused = (...) or true
  end
  return n(a, ...)
 end
end
genList = function(callback)
 updateTick = nil
 local elems = {}
 local tapes = {}
 for v in tapeAccess.list() do
  table.insert(tapes, v)
 end
 for k, v in ipairs(tapes) do
  -- There's 38 chars available...
  local desc1 = neoux.pad(v.address, 13, false, true)
  if v.isReady() then
   desc1 = desc1 .. ": " .. neoux.pad(v.getLabel() or "", 23, false, true)
  else
   desc1 = desc1 .. " (no tape)"
  end
  elems[k] = neoux.tcbutton(1, k, desc1, function (w)
   callback(v)
  end)
 end
 return 40, #elems, nil, neoux.tcwindow(40, #elems, elems, function (w)
  running = false
  w.close()
 end, 0xFFFFFF, 0)
end


window = neoux.create(genList(function (v)
 window.reset(genPlayer(v))
end))

-- Timer for time update
local function tick()
 if updateTick then
  updateTick()
 end
 event.runAt(os.uptime() + ((focused and 1) or 10), tick)
end
event.runAt(0, tick)

while running do
 event.pull()
end