if not term.isColor() then
  print("Advanced computer required")
  error()
end
print("loading...")

monitor_textScale = 0.5

Style = {
  CDefault = colors.black,
  BGDefault = colors.lightGray,

  CTitle = colors.orange,
  BGTitle = colors.black,

  CFooter =  colors.white,
  BGFooter = colors.blue,

  CWarning = colors.white,
  BGWarning = colors.red,

  CSuccess = colors.white,
  BGSuccess = colors.lime,

  CDisabled = colors.gray,
  BGDisabled = colors.blue,

  CRadarmap = colors.gray,
  BGRadarmap = colors.green,

  CRadarborder = colors.white,
  BGRadarborder = colors.black,

  CRadarself = colors.white,
  BGRadarself = colors.lime,
  TextRadarself = "R",

  CRadarother = colors.black,
  BGRadarother = colors.red,
  TextRadarother = "#"
}

----------- Monitor support

function SetMonitorColorFrontBack(frontColor, backgroundColor)
  term.setBackgroundColor(backgroundColor)
  term.setTextColor(frontColor)
  if monitors ~= nil then
    for key,monitor in pairs(monitors) do
      monitor.setTextColor(frontColor)
      monitor.setBackgroundColor(backgroundColor)
    end
  end
end

function Write(text)
  term.write(text)
  if monitors ~= nil then
    for key,monitor in pairs(monitors) do
      if key ~= data.radar_monitorIndex then
        monitor.write(text)
      end
    end
  end
end
local function getCursorPos()
  local x, y = term.getCursorPos()
  return x, y
end

function SetCursorPos(x, y)
  term.setCursorPos(x, y)
  if monitors ~= nil then
    for key,monitor in pairs(monitors) do
      if key ~= data.radar_monitorIndex then
        monitor.setCursorPos(x, y)
      end
    end
  end
end

local function getResolution()
  local sizeX, sizeY = term.getSize()
  return sizeX, sizeY
end

function SetColorDefault()
  SetMonitorColorFrontBack(Style.CDefault, Style.BGDefault)
end

function SetColorTitle()
  SetMonitorColorFrontBack(Style.CTitle, Style.BGTitle)
end

function SetColorFooter()
  SetMonitorColorFrontBack(Style.CFooter, Style.BGFooter)
end

function SetColorWarning()
  SetMonitorColorFrontBack(Style.CWarning, Style.BGWarning)
end

function SetColorSuccess()
  SetMonitorColorFrontBack(Style.CSuccess, Style.BGSuccess)
end

function SetColorDisabled()
  SetMonitorColorFrontBack(Style.CDisabled, Style.BGDisabled)
end

function SetColorNormal()
  SetMonitorColorFrontBack(Style.CDefault, Style.BGDefault)
end

function SetColorRadarmap()
  SetMonitorColorFrontBack(Style.CRadarmap, Style.BGRadarmap)
end

function SetColorRadarborder()
  SetMonitorColorFrontBack(Style.CRadarborder, Style.BGRadarborder)
end

local function clear(colorFront, colorBack)
  clearWarningTick = -1
  if CDefault == nil or BGDefault == nil then
  SetMonitorColorFrontBack(Style.CDefault, Style.BGDefault)
  else
      SetMonitorColorFrontBack(Style.CDefault, Style.BGDefault)
  end
  term.clear()
  if monitors ~= nil then
    for key, monitor in pairs(monitors) do
      if key ~= data.radar_monitorIndex then
        monitor.clear()
      end
    end
  end
  SetCursorPos(1, 1)
end

local function clearLine()
  term.clearLine()
  if monitors ~= nil then
    for key, monitor in pairs(monitors) do
      if key ~= data.radar_monitorIndex then
        monitor.clearLine()
      end
    end
  end
  local x, y = getCursorPos()
  SetCursorPos(1, y)
end

function WriteLn(text)
  Write(text)
  local x, y = term.getCursorPos()
  local width, height = term.getSize()
  if y > height - 1 then
    y = 1
  end
  SetCursorPos(1, y + 1)
end

function WriteCentered(y, text)
  local unused
  if text == nil then
    text = y
    unused, y = getCursorPos()
  end

  SetCursorPos((51 - text:len()) / 2, y)
  term.write(text)
  if monitors ~= nil then
    for key,monitor in pairs(monitors) do
      if key ~= data.radar_monitorIndex then
        local sizeX, sizeY = monitor.getSize()
		if sizeX ~= nil then
        monitor.setCursorPos((sizeX - text:len()) / 2, y)
        monitor.write(text)
       end
  end
  end
 end
  local xt, yt = term.getCursorPos()
  SetCursorPos(1, y + 1)
end
local function page_begin(text)
  clear()
  SetColorTitle()
  SetCursorPos(1, 1)
  SetColorTitle()
  clearLine()
  WriteCentered(1, text)
  SetCursorPos(1, 2)
  SetColorNormal()
end
function ShowTitle(text)
  clear()
  SetCursorPos(0, 1)
  SetColorTitle()
  clearLine()
  WriteCentered(1, text)
  SetCursorPos(1, 2)
  SetColorDefault()
end

function ShowMenu(text)
  Write(text)
  local sizeX, sizeY = term.getSize()
  local xt, yt = term.getCursorPos()
  for i = xt, sizeX do
    Write(" ")
  end
  SetCursorPos(1, yt + 1)
end

local clearWarningTick = -1
function ShowWarning(text)
  local sizeX, sizeY = term.getSize()
  SetCursorPos(1, sizeY)
  clearLine()
  SetColorWarning()
  SetCursorPos((sizeX - text:len() - 2) / 2, sizeY)
  Write(" " .. text .. " ")
  SetColorDefault()
  clearWarningTick = 5
--  clearLine()
end
function ClearWarning()
  if clearWarningTick > 0 then
    clearWarningTick = clearWarningTick - 1
  elseif clearWarningTick == 0 then
    SetColorDefault()
    local sizeX, sizeY = term.getSize()
    SetCursorPos(1, sizeY)
    clearLine()
    clearWarningTick = -1
  end
end

----------- Formatting & popups

function FormatFloat(value, nbchar)
  local str = "?"
  if value ~= nil then
    str = string.format("%g", value)
  end
  if nbchar ~= nil then
    str = string.sub("               " .. str, -nbchar)
  end
  return str
end
function FormatInteger(value, nbchar)
  local str = "?"
  if value ~= nil then
    str = string.format("%d", value)
  end
  if nbchar ~= nil then
    str = string.sub("               " .. str, -nbchar)
  end
  return str
end

function boolToYesNo(bool)
  if bool then
    return "YES"
  else
    return "no"
  end
end

function readInputNumber(currentValue)
  local inputAbort = false
  local input = string.format(currentValue)
  if input == "0" then
    input = ""
  end
  local x, y = term.getCursorPos()
  repeat
    ClearWarning()
    SetColorDefault()
    SetCursorPos(x, y)
    Write(input .. "            ")
    input = string.sub(input, -9)

    local params = { os.pullEventRaw() }
    local eventName = params[1]
    local address = params[2]
    if address == nil then address = "none" end
    if eventName == "key" then
      local keycode = params[2]
      if keycode >= 2 and keycode <= 10 then -- 1 to 9
        input = input .. string.format(keycode - 1)
      elseif keycode == 11 or keycode == 82 then -- 0 & keypad 0
        input = input .. "0"
      elseif keycode >= 79 and keycode <= 81 then -- keypad 1 to 3
        input = input .. string.format(keycode - 78)
      elseif keycode >= 75 and keycode <= 77 then -- keypad 4 to 6
        input = input .. string.format(keycode - 71)
      elseif keycode >= 71 and keycode <= 73 then -- keypad 7 to 9
        input = input .. string.format(keycode - 64)
      elseif keycode == 14 then -- Backspace
        input = string.sub(input, 1, string.len(input) - 1)
      elseif keycode == 211 then -- Delete
        input = ""
      elseif keycode == 28 then -- Enter
        inputAbort = true
      elseif keycode == 74 or keycode == 12 or keycode == 49 then -- - on numeric keypad or - on US top or n letter
        if string.sub(input, 1, 1) == "-" then
          input = string.sub(input, 2)
        else
          input = "-" .. input
        end
      elseif char == 43 or keycode == 78 then -- +
        if string.sub(input, 1, 1) == "-" then
          input = string.sub(input, 2)
        end
      else
        ShowWarning("Key " .. keycode .. " is invalid")
      end
    elseif eventName == "terminate" then
      inputAbort = true
    elseif not common_event(eventName, params[2]) then
      ShowWarning("Event '" .. eventName .. "', " .. address .. " is unsupported")
    end
  until inputAbort
  SetCursorPos(1, y + 1)
  if input == "" or input == "-" then
    return currentValue
  else
    return tonumber(input)
  end
end
function readInput(currentValue)
  local inputAbort = false
  local input = string.format(currentValue)
  local x, y = term.getCursorPos()
  Write(input)
  os.pullEventRaw() -- skip first char event
  repeat
    ClearWarning()
    SetColorDefault()
    SetCursorPos(x, y)
    Write(input .. "                              ")
    input = string.sub(input, -123)

    local params = { os.pullEventRaw() }
    local eventName = params[1]
    local address = params[2]
    if address == nil then address = "none" end
    if eventName == "key" then
      local keycode = params[2]
      if keycode == 14 then -- Backspace
        input = string.sub(input, 1, string.len(input) - 1)
      elseif keycode == 211 then -- Delete
        input = ""
      elseif keycode == 28 then -- Enter
        inputAbort = true
		end
    elseif eventName == "char" then
      local char = params[2]
      if char >= ' ' and char <= '~' then -- 1 to 9
        input = input .. char
      end
    elseif eventName == "terminate" then
      inputAbort = true
	elseif eventName == "paste" then
	  input = params[2]
    elseif not common_event(eventName, params[2]) then
      ShowWarning("Event '" .. eventName .. "', " .. address .. " is unsupported")
    end
  until inputAbort
  SetCursorPos(1, y + 1)
  if input == "" then
    return currentValue
  else
    return input
  end
end
function readInputText(currentValue)
  local inputAbort = false
  local input = string.format(currentValue)
  local x, y = term.getCursorPos()
  Write(input)
  os.pullEventRaw() -- skip first char event
  repeat
    ClearWarning()
    SetColorDefault()
    SetCursorPos(x, y)
    Write(input .. "                              ")
    input = string.sub(input, -30)

    local params = { os.pullEventRaw() }
    local eventName = params[1]
    local address = params[2]
    if address == nil then address = "none" end
    if eventName == "key" then
      local keycode = params[2]
      if keycode == 14 then -- Backspace
        input = string.sub(input, 1, string.len(input) - 1)
      elseif keycode == 211 then -- Delete
        input = ""
      elseif keycode == 28 then -- Enter
        inputAbort = true
      else
        ShowWarning("Key " .. keycode .. " is invalid")
      end
    elseif eventName == "char" then
      local char = params[2]
      if char >= ' ' and char <= '~' then -- 1 to 9
        input = input .. char
      else
        ShowWarning("Char #" .. string.byte(char) .. " is invalid")
      end
    elseif eventName == "terminate" then
      inputAbort = true
    elseif not common_event(eventName, params[2]) then
      ShowWarning("Event '" .. eventName .. "', " .. address .. " is unsupported")
    end
  until inputAbort
  SetCursorPos(1, y + 1)
  if input == "" then
    return currentValue
  else
    return input
  end
end

function readConfirmation(msg)
  if msg == nil then
    ShowWarning("Are you sure? (y/n)")
  else
    ShowWarning(msg)
  end
  repeat
    local params = { os.pullEventRaw() }
    local eventName = params[1]
    local address = params[2]
    if address == nil then address = "none" end
    if eventName == "key" then
      local keycode = params[2]
      if keycode == 21 then -- Y
        return true
      else
        return false
      end
    elseif eventName == "terminate" then
      return false
    elseif not common_event(eventName, params[2]) then
      ShowWarning("Event '" .. eventName .. "', " .. address .. " is unsupported")
    end
  until false
end

----------- commons: menu, event handlers, etc.

function common_event(eventName, param)
  if eventName == "redstone" then
    redstone_event(param)
  elseif eventName == "timer" then
    if param == radar_timerId then
      radar_timerEvent()
    end
  elseif eventName == "shipCoreCooldownDone" then
    ShowWarning("Ship core cooldown done")
  elseif eventName == "reactorPulse" then
    reactor_pulse(param)
--  elseif eventName == "reactorDeactivation" then
--    ShowWarning("Reactor deactivated")
--  elseif eventName == "reactorActivation" then
--    ShowWarning("Reactor activated")
  elseif eventName == "char" then
  elseif eventName == "key_up" then
  elseif eventName == "mouse_click" then
  elseif eventName == "mouse_up" then
  elseif eventName == "mouse_drag" then
  elseif eventName == "monitor_touch" then
  elseif eventName == "monitor_resize" then
  elseif eventName == "peripheral" then
  elseif eventName == "peripheral_detach" then
  else
    return false
  end
  return true
end

function menu_common()
  SetCursorPos(1, 17)
  SetColorFooter()
  ShowMenu("0 Home 1 Ship 2 Cloak 3 Shield 4 Radar 5 Mining                      ")
  ShowMenu("6 Transport 7 Reactor 8 Hooks X eXit                                   ")
  SetColorDefault()
end

----------- Redstone support

local tblRedstoneState = {-- Remember redstone state on each side
  ["top"] = rs.getInput("top"),
  ["front"] = rs.getInput("front"),
  ["left"] = rs.getInput("left"),
  ["right"] = rs.getInput("right"),
  ["back"] = rs.getInput("back"),
  ["bottom"] = rs.getInput("bottom"),
}
local tblSides = {-- list all sides and offset coordinates
  ["top"   ] = { 3, 1},
  ["front" ] = { 1, 3},
  ["left"  ] = { 3, 3},
  ["right" ] = { 5, 3},
  ["back"  ] = { 5, 5},
  ["bottom"] = { 3, 5},
}

function redstone_event()
  -- Event only returns nil so we need to check sides manually
  local message = ""
  for side, state in pairs(tblRedstoneState) do
    if rs.getInput(side) ~= state then
      -- print(side .. " is now " .. tostring(rs.getInput(side)))
      message = message .. side .. " "
      tblRedstoneState[side] = rs.getInput(side)
    end
  end
  if message ~= "" then
    message = "Redstone changed on " .. message
    showWarning(message)
  end
end

----------- Configuration

function data_save()
  local file = fs.open("shipdata.txt", "w")
  if file ~= nil then
    file.writeLine(textutils.serialize(data))
    file.close()
  else
    ShowWarning("No file system")
    os.sleep(3)
  end
end

function data_read()
  data = { }
  if fs.exists("shipdata.txt") then
    local file = fs.open("shipdata.txt", "r")
    data = textutils.unserialize(file.readAll())
    file.close()
	if data == nil then data = {}; end
  end
  if data.radar_monitorIndex == nil then data.radar_monitorIndex = 0; end
  if data.radar_radius == nil then data.radar_radius = 500; end
  if data.radar_autoscan == nil then data.radar_autoscan = false; end
  if data.radar_autoscanDelay == nil then data.radar_autoscanDelay = 3; end
  if data.radar_results == nil then data.radar_results = {}; end
  if data.radar_scale == nil then data.radar_scale = 500; end
  if data.radar_offsetX == nil then data.radar_offsetX = 0; end
  if data.radar_offsetY == nil then data.radar_offsetY = 0; end
  if data.radar_hook == nil then data.radar_hook = 0; end
end


function string_split(source, sep)
  local sep = sep or ":"
  local fields = {}
  local pattern = string.format("([^%s]+)", sep)
  source:gsub(pattern, function(c) fields[#fields + 1] = c end)
  return fields
end

----------- Radar support

radar_listOffset = 0
radar_timerId = -1
radar_timerLength = 1
radar_x = 0
radar_y = 0
radar_z = 0

function radar_boot()
  if radar ~= nil then
    WriteLn("Booting Radar...")
    if data.radar_monitorIndex > 0 then
      local _, _, radar_x, radar_y, radar_z = radar.getGlobalPosition()
      radar_drawMap()
    end
    if data.radar_autoscan then
    end
  end
end

function radar_key(char, keycode)
  if char == 83 or char == 115 or keycode == 31 then -- S
    data.radar_autoscan = false
    radar_scan()
    return true
  elseif keycode == 30 then -- A
    data.radar_autoscan = true
    radar_scan()
    return true
  elseif char == 80 or char == 112 or keycode == 25 then -- P
    data.radar_autoscan = false
    return true
  elseif keycode == 49 then -- N
    radar_setMonitorIndex(data.radar_monitorIndex + 1)
    data_save()
    radar_drawMap()
    return true
  elseif char == 71 or char == 103 or keycode == 34 then -- G
    radar_setRadius(data.radar_radius - 100)
    data_save()
    return true
  elseif char == 84 or char == 116 or keycode == 20 then -- T
    if data.radar_radius < 100 then
      radar_setRadius(100)
    else
      radar_setRadius(data.radar_radius + 100)
    end
    data_save()
    return true
  elseif keycode == 36 then -- J
    radar_listOffset = math.max(0, radar_listOffset - 3)
    return true
  elseif keycode == 22 then -- U
    radar_listOffset = math.min(#data.radar_results - 1, radar_listOffset + 3)
    return true
  elseif char == 45 or keycode == 74 then -- -
    data.radar_scale = math.min(10000, math.floor(data.radar_scale * 1.2 + 0.5))
    data_save()
    radar_drawMap()
    return true
  elseif char == 43 or keycode == 78 then -- +
    data.radar_scale = math.max(20, math.floor(data.radar_scale * 0.8 + 0.5))
    data_save()
    radar_drawMap()
    return true
  elseif keycode == 199 then -- home
    data.radar_offsetX = 0
    data.radar_offsetY = 0
    data.radar_scale = 20
    for i = 0, #data.radar_results - 1 do
      data.radar_scale = math.max(data.radar_scale, math.max(math.abs(radar_x - data.radar_results[i].x), math.abs(radar_z - data.radar_results[i].z)))
    end
    data.radar_scale = math.min(10000, math.floor(data.radar_scale * 1.1 + 0.5))
    data_save()
    radar_drawMap()
    return true
  elseif keycode == 203 then -- left
    data.radar_offsetX = data.radar_offsetX - 0.20 * data.radar_scale
    data_save()
    radar_drawMap()
    return true
  elseif keycode == 205 then -- right
    data.radar_offsetX = data.radar_offsetX + 0.20 * data.radar_scale
    data_save()
    radar_drawMap()
    return true
  elseif keycode == 200 then -- up
    data.radar_offsetY = data.radar_offsetY - 0.20 * data.radar_scale
    data_save()
    radar_drawMap()
    return true
  elseif keycode == 208 then -- down
    data.radar_offsetY = data.radar_offsetY + 0.20 * data.radar_scale
    data_save()
    radar_drawMap()
    return true
  elseif keycode == 46 then -- C
    radar_page_config()
    data_save()
    return true
  end
  return false
end

function radar_page()
  local radar_resultsPerPage = 9

  ShowTitle(label .. " - Radar map")

  SetCursorPos(1, 2)
  if radar == nil or radar.isInterfaced() == nil then
    SetColorDisabled()
    Write("Radar not detected")
  else
    SetColorDefault()
    if #data.radar_results == 0 then
      Write("No contacts in range...")
    else
      local lastResultShown = radar_listOffset + radar_resultsPerPage - 1
      if lastResultShown >= #data.radar_results then
        lastResultShown = #data.radar_results - 1
      end
      Write("Displaying results " .. (radar_listOffset + 1) .. " to " .. (lastResultShown + 1) .. " of " .. #data.radar_results)
      for i = radar_listOffset, lastResultShown do
        SetCursorPos(4, 3 + i - radar_listOffset)
        if data.radar_results ~= nil then
          Write(FormatInteger(data.radar_results[i].x, 7) .. ", " .. FormatInteger(data.radar_results[i].y, 4) .. ", " .. FormatInteger(data.radar_results[i].z, 7))
        else
          Write("~nil~")
        end
      end
    end

    SetColorDefault()
    local energyStored, energyMax, energyUnits = radar.getEnergyStatus()
    local success, result = radar.getEnergyRequired(data.radar_radius)
    local energyRequired = 0
    if success then
      energyRequired = result
    end
    SetCursorPos(1, 12)
    Write("Energy: ")
    if energyStored > energyRequired then
      SetColorSuccess()
    else
      SetColorWarning()
    end
    Write(FormatInteger(energyStored, 10) .. " " .. energyUnits)
    SetColorDefault()
    SetCursorPos(1, 13)
    Write("Radius: " .. data.radar_radius)

    SetCursorPos(30, 13)
    Write("Monitor# " .. data.radar_monitorIndex .. "/" .. #monitors)

    SetCursorPos(1, 14)
    Write("Autoscan: ")
    if data.radar_autoscan then SetColorSuccess() else SetColorDefault() end
    Write(boolToYesNo(data.radar_autoscan))

    SetColorDefault()
    SetCursorPos(30, 14)
    Write("Delay " .. data.radar_autoscanDelay .. "s")
  end

  SetColorFooter()
  SetCursorPos(1, 15)
  ShowMenu(" S - Scan once, A - Autoscan, P - Stop autoscan")
  SetCursorPos(1, 16)
  ShowMenu(" T/G - Scan radius, U/J - Scroll list")
  SetCursorPos(1, 17)
  ShowMenu(" +/- - Scale, N - Next monitor, C - Configuration")
end

function radar_page_config()
  ShowTitle(label .. " - Radar configuration")

  SetCursorPos(1, 2)
  if radar == nil or radar.isInterfaced() == nil then
    SetColorDisabled()
    Write("No radar detected")
  else
    SetColorDefault()
    SetCursorPos(1, 3)
    Write("Radar scan radius (" .. data.radar_radius .. " blocks): ")
    radar_setRadius(readInputNumber(data.radar_radius))

    SetCursorPos(1, 5)
    Write("Autoscan delay in seconds (" .. data.radar_autoscanDelay .. "): ")
    radar_setAutoscanDelay(readInputNumber(data.radar_autoscanDelay))

    SetCursorPos(1, 7)
    Write("Output monitor (" .. data.radar_monitorIndex .. "/" .. #monitors .. "): ")
    radar_setMonitorIndex(readInputNumber(data.radar_monitorIndex))

    data_save()
  end
end
function hooks_page_config()
  ShowTitle(label .. " - Webhook configuration")

  SetCursorPos(1, 2)
    SetColorDefault()
    SetCursorPos(1, 3)
    Write("Ship GPS Webhook: ")
    hook_gpsset(readInput(data.gps_hook))

    SetCursorPos(1, 5)
    Write("Radar Results Webhook: ")
    hook_radset(readInput(data.radar_hook))

    SetCursorPos(1, 7)
    Write("AutoPilot Webhook: ")
    hook_autoset(readInput(data.auto_hook))

    data_save()
end
function hook_gpsset(newGps)
    data.gps_hook = newGps
end
function hook_radset(newRad)
    data.radar_hook = newRad
end
function hook_autoset(newAuto)
    data.auto_hook = newAuto
end
function radar_setRadius(newRadius)
  if newRadius < 1 then
    data.radar_radius = 1
  elseif newRadius >= 10000 then
    data.radar_radius = 10000
  else
    data.radar_radius = newRadius
  end
end

function radar_setAutoscanDelay(newAutoscanDelay)
  if newAutoscanDelay < 1 then
    data.radar_autoscanDelay = 1
  elseif newAutoscanDelay >= 3600 then  -- 1 hour
    data.radar_autoscanDelay = 3600
  else
    data.radar_autoscanDelay = newAutoscanDelay
  end
end

function radar_setMonitorIndex(newIndex)
  if #monitors == 0 or newIndex < 0 or newIndex > #monitors then
    data.radar_monitorIndex = 0
  else
    data.radar_monitorIndex = newIndex
  end
end

function radar_getMonitor()
  if data.radar_monitorIndex > 0 and data.radar_monitorIndex <= #monitors then
    return monitors[data.radar_monitorIndex]
  else
    return nil
  end
end

function radar_scan()
  local monitor = radar_getMonitor()
  if radar == nil or radar.isInterfaced() == nil then
    draw_warning(monitor, "No radar")
    return false
  end
  local energyStored, energyMax, _ = radar.getEnergyStatus()
  if energyStored == nil then energyStored = 0 end
  if energyMax == nil or energyMax == 0 then energyMax = 1 end

  radar.radius(radius)
  radar.start()
  local success, result = radar.getEnergyRequired()
  if not success then
    showErrorAndExit(result)
  end
  local energyRequired = result

  if energyRequired <= 0 or energyStored < energyRequired then
    textOut((w / 2) - 7, 1, " /!\\  LOW POWER ", colors.white, colors.red)
    os.sleep(1)

    return 0
  end
  if radar_timerId ~= -1 and radar.getResultsCount() == -1 then
    draw_warning(monitor, "Already scanning...")
    return false
  end
  local scanDuration = radar.getScanDuration()
  radar_timerId = os.startTimer(radar_timerLength)
  os.sleep(scanDuration)
  radar.radius(data.radar_radius)
  if radar.start() then
    draw_warning(monitor, "Scanning...")
  end
  return false
end

function radar_scanDone()
  local numResults = radar.getResultsCount()
  data.radar_results = {}
  if (numResults ~= 0) then
    for i = 0, numResults do
      local success, type, name, x, y, z = radar.getResult(i)
      if success then
        if name == "" then
          name = "?"
        end
        data.radar_results[i] = { x = x, y = y, z = z, name = name, type = type }
      end
    end
    data.radar_scale = data.radar_radius
  end
  data_save()
  radar_drawMap()
end

function draw_text(monitor, x, y, text, textColor, backgroundColor)
  if monitor == nil then
    term.setCursorPos(x, y)
    if textColor ~= nil then term.setTextColor(textColor) end
    if backgroundColor ~= nil then term.setBackgroundColor(backgroundColor) end
    term.write(text)
    local xt, yt = term.getCursorPos()
    term.setCursorPos(1, yt + 1)
  else
    monitor.setCursorPos(x, y)
    if textColor ~= nil then monitor.setTextColor(textColor) end
    if backgroundColor ~= nil then monitor.setBackgroundColor(backgroundColor) end
    monitor.write(text)
    local xt, yt = monitor.getCursorPos()
    monitor.setCursorPos(1, yt + 1)
  end
end

function draw_warning(monitor, text)
  local screenWidth, screenHeight
  if monitor == nil then
    screenWidth, screenHeight = term.getSize()
  else
    screenWidth, screenHeight = monitor.getSize()
  end
  local centerX = math.floor(screenWidth / 2)
  local centerY = math.floor(screenHeight / 2)
  local halfWidth = math.ceil(string.len(text) / 2)
  local blank = string.sub("                              ", - (string.len(text) + 2))

  draw_text(monitor, centerX - halfWidth - 1, centerY - 1, blank, colors.white, colors.red)
  draw_text(monitor, centerX - halfWidth - 1, centerY    , " " .. text .. " ", colors.white, colors.red)
  draw_text(monitor, centerX - halfWidth - 1, centerY + 1, blank, colors.white, colors.red)
end

function draw_centeredText(monitor, y, text)
  local screenWidth, screenHeight
  if monitor == nil then
    screenWidth, screenHeight = term.getSize()
  else
    screenWidth, screenHeight = monitor.getSize()
  end
  local x = math.floor(screenWidth / 2 - string.len(text) / 2 + 0.5)

  draw_text(monitor, x, y, text, nil, nil)
end

function radar_drawContact(monitor, contact)
  local screenWidth, screenHeight
  if monitor == nil then
    screenWidth, screenHeight = term.getSize()
  else
    screenWidth, screenHeight = monitor.getSize()
  end

  local screenX = (radar_x + data.radar_offsetX - contact.x) / data.radar_scale
  local screenY = (radar_z + data.radar_offsetY - contact.z) / data.radar_scale
  local visible = true

  if screenX <= -1 or screenX >= 1 or screenY <= -1 or screenY >= 1 then
    screenX = math.min(1, math.max(-1, screenX))
    screenY = math.min(1, math.max(-1, screenY))
    visible = false
  end

  screenX = math.floor(screenX * (screenWidth  - 3) / 2 + ((screenWidth  - 1)  / 2) + 1.5)
  screenY = math.floor(screenY * (screenHeight - 3) / 2 + ((screenHeight - 1) / 2) + 1.5)

  if contact.type == "self" then
    draw_text(monitor, screenX, screenY, Style.TextRadarself, Style.CRadarself, Style.BGRadarself)
  else
    draw_text(monitor, screenX, screenY, Style.TextRadarother, Style.CRadarother, Style.BGRadarother)
  end
  if visible then
    local text = contact.name
    screenX = math.min(screenWidth - 1 - string.len(text), math.max(2, math.floor(screenX - string.len(text) / 2 + 0.5)))
    if screenY == (screenHeight - 1) then
      screenY = screenY - 1
    else
      screenY = screenY + 1
    end
    draw_text(monitor, screenX, screenY, text, Style.CRadarother, Style.BGRadarother)
  end
end

function radar_drawMap()
  local screenWidth, screenHeight, x, y
  local monitor = radar_getMonitor()
  -- center area
  SetColorRadarmap()
  if monitor == nil then
    term.clear()
    screenWidth, screenHeight = term.getSize()
  else
    monitor.clear()
    screenWidth, screenHeight = monitor.getSize()
  end
  -- borders
  SetColorRadarborder()
  for x = 1, screenWidth do
    if monitor == nil then
      term.setCursorPos(x, 1)
      term.write(" ")
      term.setCursorPos(x, screenHeight)
      term.write(" ")
    else
      monitor.setCursorPos(x, 1)
      monitor.write(" ")
      monitor.setCursorPos(x, screenHeight)
      monitor.write(" ")
    end
  end
  for y = 2, screenHeight - 1 do
    if monitor == nil then
      term.setCursorPos(1, y)
      term.write(" ")
      term.setCursorPos(screenWidth, y)
      term.write(" ")
    else
      monitor.setCursorPos(1, y)
      monitor.write(" ")
      monitor.setCursorPos(screenWidth, y)
      monitor.write(" ")
    end
  end
  -- title
  local text = label .. " - Radar map"
  if #data.radar_results == 0 then
    text = text .. " (no contacts)"
  else
    text = text .. " (" .. #data.radar_results .. " contacts)"
  end
     draw_centeredText(monitor, 1, text)
  -- status
  local text = "Scan radius: " .. data.radar_radius
  if radar ~= nil then
    local energyStored, energyMax, energyUnits = radar.getEnergyStatus()
    text = text .. " | Energy: " .. energyStored .. " " .. energyUnits
  end
  text = text .. " | Scale: " .. data.radar_scale
  draw_centeredText(monitor, screenHeight, text)
  -- results
  SetCursorPos(1, 12)
  radar_drawContact(monitor, {x = radar_x, y = radar_y, z = radar_z, name = "", type = "self"})
  for i = 0, #data.radar_results - 1 do
    radar_drawContact(monitor, data.radar_results[i])
  end

  -- restore defaults
  SetColorDefault()
end

radar_waitingNextScan = false
function radar_timerEvent()
  radar_timerId = -1
  if radar_waitingNextScan then
    radar_waitingNextScan = false
    radar_scan() -- will restart timer
  else
    local numResults = radar.getResultsCount()
    if numResults ~= -1 then
      radar_scanDone()
      if data.radar_autoscan then
        radar_waitingNextScan = true
        radar_timerId = os.startTimer(data.radar_autoscanDelay)
      end
    else -- still scanning
    --  radar_timerId = os.startTimer(data.radar_autoscanDelay)
    end
  end
end

----------- Boot sequence
math.randomseed(os.time())
label = os.getComputerLabel()
if not label then
  label = "" .. os.getComputerID()
end

-- read configuration
data_read()
clear()
print("data_read...")

-- initial scanning
monitors = {}
ShowTitle(label .. " - Connecting...")
WriteLn("")

sides = peripheral.getNames()
radar = nil
for key,side in pairs(sides) do
  os.sleep(0)
  Write("Checking " .. side .. " ")
  local componentType = peripheral.getType(side)
  Write(componentType .. " ")
if componentType == "warpdriveRadar" then
    Write("wrapping!")
    radar = peripheral.wrap(side)
  elseif componentType == "monitor" then
    Write("wrapping!")
    lmonitor = peripheral.wrap(side)
    table.insert(monitors, lmonitor)
    lmonitor.setTextScale(monitor_textScale)
  end
  WriteLn("")
end

if not os.getComputerLabel() and (ship ~= nil or reactor ~= nil) then
  data_setName()
end

-- peripherals status
function connections_page()
  SetCursorPos(0, 1)
  SetColorTitle()
  ShowTitle(label .. " - Connections")

  WriteLn("")
  if #monitors == 0 then
    SetColorWarning()
    WriteLn("No Monitor detected")
  elseif #monitors == 1 then
    SetColorSuccess()
    WriteLn("1 monitor detected")
  else
    SetColorSuccess()
    WriteLn(#monitors .. " Monitors detected")
  end
  if radar == nil or radar.isInterfaced() == nil then
    SetColorWarning()
    WriteLn("No radar detected")
  else
    SetColorSuccess()
    WriteLn("Radar detected")
  end

  WriteLn("")
  SetColorDefault()
  WriteLn("Please refer to below menu for keyboard controls")
  WriteLn("For example, press 1 to access Ship page")
end

-- peripheral boot up
clear()
connections_page()
SetColorDefault()
WriteLn("")
os.sleep(0)
radar_boot()
os.sleep(0)

-- main loop
abort = false
refresh = true
page = connections_page
keyHandler = nil
repeat
  ClearWarning()
  if refresh then
    clear()
    page()
    menu_common()
    refresh = false
  end
  params = { os.pullEventRaw() }
  eventName = params[1]
  address = params[2]
  if address == nil then address = "none" end
  -- WriteLn("...")
  -- WriteLn("Event '" .. eventName .. "', " .. address .. ", " .. params[3] .. ", " .. params[4] .. " received")
  -- os.sleep(0.2)
  if eventName == "key" then
    keycode = params[2]
    if char == 88 or char == 120 or keycode == 45 then -- x for eXit
      os.pullEventRaw()
      abort = true
    elseif char == 48 or keycode == 11 or keycode == 82 then -- 0
      page = connections_page
      keyHandler = nil
      refresh = true
    elseif char == 49 or keycode == 2 or keycode == 79 then -- 1
      page = core_page
      keyHandler = core_key
      refresh = true
    elseif char == 50 or keycode == 3 or keycode == 80 then -- 2
      page = cloaking_page
      keyHandler = cloaking_key
      refresh = true
    elseif char == 51 or keycode == 4 or keycode == 81 then -- 3
      page = shield_page
      keyHandler = shield_key
      refresh = true
    elseif char == 52 or keycode == 5 or keycode == 75 then -- 4
      page = radar_page
      keyHandler = radar_key
      refresh = true
    elseif char == 53 or keycode == 6  or keycode == 76 then -- 5
      page = mining_page
      keyHandler = mining_key
      refresh = true
	elseif char == 54 or keycode == 7  or keycode == 77 then -- 6
      page = mining_page
      keyHandler = mining_key
      refresh = true
	elseif char == 55 or keycode == 8  then -- 7
	  page = reactor_page
      keyHandler = reactor_key
      refresh = true
	elseif char == 56 or keycode == 9  or keycode == 79 then -- 8
	  page = hooks_page_config
      keyHandler = hooks_page_key
      refresh = true
    elseif keyHandler ~= nil and keyHandler(char, keycode) then
      refresh = true
      os.sleep(0)
    elseif char == 0 then -- control chars
      refresh = false
      os.sleep(0)
    else
      ShowWarning("Key " .. keycode .. " is invalid")
      os.sleep(0.2)
    end
  elseif eventName == "terminate" then
    abort = true
  elseif not common_event(eventName, params[2]) then
    ShowWarning("Event '" .. eventName .. "', " .. address .. " is unsupported")
    refresh = true
    os.sleep(0.2)
  end
until abort

-- clear screens on exit
SetMonitorColorFrontBack(colors.white, colors.black)
term.clear()
if monitors ~= nil then
  for key,monitor in pairs(monitors) do
    monitor.clear()
  end
end
SetCursorPos(1, 1)
WriteLn("Program terminated")
WriteLn("Type startup to restart it")