startup

tArgs = {...}

if OneOS then
    --running under OneOS
    OneOS.ToolBarColour = colours.white
    OneOS.ToolBarTextColour = colours.grey
end

local _w, _h = term.getSize()

local round = function(num, idp)
    local mult = 10^(idp or 0)
    return math.floor(num * mult + 0.5) / mult
end

InterfaceElements = {}

Drawing = {

    Screen = {
        Width = _w,
        Height = _h
    },

    DrawCharacters = function (x, y, characters, textColour,bgColour)
        Drawing.WriteStringToBuffer(x, y, characters, textColour, bgColour)
    end,

    DrawBlankArea = function (x, y, w, h, colour)
        Drawing.DrawArea (x, y, w, h, " ", 1, colour)
    end,

    DrawArea = function (x, y, w, h, character, textColour, bgColour)
        --width must be greater than 1, other wise we get a stack overflow
        if w < 0 then
            w = w * -1
        elseif w == 0 then
            w = 1
        end

        for ix = 1, w do
            local currX = x + ix - 1
            for iy = 1, h do
                local currY = y + iy - 1
                Drawing.WriteToBuffer(currX, currY, character, textColour, bgColour)
            end
        end
    end,

    DrawImage = function(_x,_y,tImage, w, h)
        if tImage then
            for y = 1, h do
                if not tImage[y] then
                    break
                end
                for x = 1, w do
                    if not tImage[y][x] then
                        break
                    end
                    local bgColour = tImage[y][x]
                    local textColour = tImage.textcol[y][x] or colours.white
                    local char = tImage.text[y][x]
                    Drawing.WriteToBuffer(x+_x-1, y+_y-1, char, textColour, bgColour)
                end
            end
        elseif w and h then
            Drawing.DrawBlankArea(x, y, w, h, colours.green)
        end
    end,
    --using .nft
    LoadImage = function(path)
        local image = {
            text = {},
            textcol = {}
        }
        local fs = fs
        if OneOS then
            fs = OneOS.FS
        end
        if fs.exists(path) then
            local _open = io.open
            if OneOS then
                _open = OneOS.IO.open
            end
            local file = _open(path, "r")
            local sLine = file:read()
            local num = 1
            while sLine do
                    table.insert(image, num, {})
                    table.insert(image.text, num, {})
                    table.insert(image.textcol, num, {})

                    --As we're no longer 1-1, we keep track of what index to write to
                    local writeIndex = 1
                    --Tells us if we've hit a 30 or 31 (BG and FG respectively)- next char specifies the curr colour
                    local bgNext, fgNext = false, false
                    --The current background and foreground colours
                    local currBG, currFG = nil,nil
                    for i=1,#sLine do
                            local nextChar = string.sub(sLine, i, i)
                            if nextChar:byte() == 30 then
                                bgNext = true
                            elseif nextChar:byte() == 31 then
                                fgNext = true
                            elseif bgNext then
                                currBG = Drawing.GetColour(nextChar)
                                bgNext = false
                            elseif fgNext then
                                currFG = Drawing.GetColour(nextChar)
                                fgNext = false
                            else
                                if nextChar ~= " " and currFG == nil then
                                       currFG = colours.white
                                end
                                image[num][writeIndex] = currBG
                                image.textcol[num][writeIndex] = currFG
                                image.text[num][writeIndex] = nextChar
                                writeIndex = writeIndex + 1
                            end
                    end
                    num = num+1
                    sLine = file:read()
            end
            file:close()
        end
        return image
    end,

    DrawCharactersCenter = function(x, y, w, h, characters, textColour,bgColour)
        w = w or Drawing.Screen.Width
        h = h or Drawing.Screen.Height
        x = x or 0
        y = y or 0
        x = math.ceil((w - #characters) / 2) + x
        y = math.floor(h / 2) + y

        Drawing.DrawCharacters(x, y, characters, textColour, bgColour)
    end,

    GetColour = function(hex)
        if hex == ' ' then
            return colours.transparent
        end
        local value = tonumber(hex, 16)
        if not value then return nil end
        value = math.pow(2,value)
        return value
    end,

    Clear = function (_colour)
        _colour = _colour or colours.black
        Drawing.ClearBuffer()
        Drawing.DrawBlankArea(1, 1, Drawing.Screen.Width, Drawing.Screen.Height, _colour)
    end,

    Buffer = {},
    BackBuffer = {},

    DrawBuffer = function()
        for y,row in pairs(Drawing.Buffer) do
            for x,pixel in pairs(row) do
                local shouldDraw = true
                local hasBackBuffer = true
                if Drawing.BackBuffer[y] == nil or Drawing.BackBuffer[y][x] == nil or #Drawing.BackBuffer[y][x] ~= 3 then
                    hasBackBuffer = false
                end
                if hasBackBuffer and Drawing.BackBuffer[y][x][1] == Drawing.Buffer[y][x][1] and Drawing.BackBuffer[y][x][2] == Drawing.Buffer[y][x][2] and Drawing.BackBuffer[y][x][3] == Drawing.Buffer[y][x][3] then
                    shouldDraw = false
                end
                if shouldDraw then
                    term.setBackgroundColour(pixel[3])
                    term.setTextColour(pixel[2])
                    term.setCursorPos(x, y)
                    term.write(pixel[1])
                end
            end
        end
        Drawing.BackBuffer = Drawing.Buffer
        Drawing.Buffer = {}
        term.setCursorPos(1,1)
    end,

    ClearBuffer = function()
        Drawing.Buffer = {}
    end,

    WriteStringToBuffer = function (x, y, characters, textColour,bgColour)
        for i = 1, #characters do
            local character = characters:sub(i,i)
            Drawing.WriteToBuffer(x + i - 1, y, character, textColour, bgColour)
        end
    end,

    WriteToBuffer = function(x, y, character, textColour,bgColour)
        x = round(x)
        y = round(y)
        if bgColour == colours.transparent then
            Drawing.Buffer[y] = Drawing.Buffer[y] or {}
            Drawing.Buffer[y][x] = Drawing.Buffer[y][x] or {"", colours.white, colours.black}
            Drawing.Buffer[y][x][1] = character
            Drawing.Buffer[y][x][2] = textColour
        else
            Drawing.Buffer[y] = Drawing.Buffer[y] or {}
            Drawing.Buffer[y][x] = {character, textColour, bgColour}
        end
    end,
}

Current = {
    Document = nil,
    TextInput = nil,
    CursorPos = {1,1},
    CursorColour = colours.black,
    Selection = {8, 36},
    Window = nil,
    HeaderText = '',
    StatusText = '',
    StatusColour = colours.grey,
    StatusScreen = true,
    ButtonOne = nil,
    ButtonTwo = nil,
    Locked = false,
    Page = '',
    PageControls = {}
}

isRunning = true

Events = {}

Button = {
    X = 1,
    Y = 1,
    Width = 0,
    Height = 0,
    BackgroundColour = colours.lightGrey,
    TextColour = colours.white,
    ActiveBackgroundColour = colours.lightGrey,
    Text = "",
    Parent = nil,
    _Click = nil,
    Toggle = nil,

    AbsolutePosition = function(self)
        return self.Parent:AbsolutePosition()
    end,

    Draw = function(self)
        local bg = self.BackgroundColour
        local tc = self.TextColour
        if type(bg) == 'function' then
            bg = bg()
        end

        if self.Toggle then
            tc = colours.white
            bg = self.ActiveBackgroundColour
        end

        local pos = GetAbsolutePosition(self)
        Drawing.DrawBlankArea(pos.X, pos.Y, self.Width, self.Height, bg)
        Drawing.DrawCharactersCenter(pos.X, pos.Y, self.Width, self.Height, self.Text, tc, bg)
    end,

    Initialise = function(self, x, y, width, height, backgroundColour, parent, click, text, textColour, toggle, activeBackgroundColour)
        local new = {}    -- the new instance
        setmetatable( new, {__index = self} )
        height = height or 1
        new.Width = width or #text + 2
        new.Height = height
        new.Y = y
        new.X = x
        new.Text = text or ""
        new.BackgroundColour = backgroundColour or colours.lightGrey
        new.TextColour = textColour or colours.white
        new.ActiveBackgroundColour = activeBackgroundColour or colours.lightBlue
        new.Parent = parent
        new._Click = click
        new.Toggle = toggle
        return new
    end,

    Click = function(self, side, x, y)
        if self._Click then
            if self:_Click(side, x, y, not self.Toggle) ~= false and self.Toggle ~= nil then
                self.Toggle = not self.Toggle
                Draw()
            end
            return true
        else
            return false
        end
    end
}

Label = {
    X = 1,
    Y = 1,
    Width = 0,
    Height = 0,
    BackgroundColour = colours.lightGrey,
    TextColour = colours.white,
    Text = "",
    Parent = nil,

    AbsolutePosition = function(self)
        return self.Parent:AbsolutePosition()
    end,

    Draw = function(self)
        local bg = self.BackgroundColour
        local tc = self.TextColour

        if self.Toggle then
            tc = UIColours.MenuBarActive
            bg = self.ActiveBackgroundColour
        end

        local pos = GetAbsolutePosition(self)
        Drawing.DrawCharacters(pos.X, pos.Y, self.Text, self.TextColour, self.BackgroundColour)
    end,

    Initialise = function(self, x, y, text, textColour, backgroundColour, parent)
        local new = {}    -- the new instance
        setmetatable( new, {__index = self} )
        height = height or 1
        new.Width = width or #text + 2
        new.Height = height
        new.Y = y
        new.X = x
        new.Text = text or ""
        new.BackgroundColour = backgroundColour or colours.white
        new.TextColour = textColour or colours.black
        new.Parent = parent
        return new
    end,

    Click = function(self, side, x, y)
        return false
    end
}

TextBox = {
    X = 1,
    Y = 1,
    Width = 0,
    Height = 0,
    BackgroundColour = colours.lightGrey,
    TextColour = colours.black,
    Parent = nil,
    TextInput = nil,
    Placeholder = '',

    AbsolutePosition = function(self)
        return self.Parent:AbsolutePosition()
    end,

    Draw = function(self)
        local pos = GetAbsolutePosition(self)
        Drawing.DrawBlankArea(pos.X, pos.Y, self.Width, self.Height, self.BackgroundColour)
        local text = self.TextInput.Value
        if #tostring(text) > (self.Width - 2) then
            text = text:sub(#text-(self.Width - 3))
            if Current.TextInput == self.TextInput then
                Current.CursorPos = {pos.X + 1 + self.Width-2, pos.Y}
            end
        else
            if Current.TextInput == self.TextInput then
                Current.CursorPos = {pos.X + 1 + self.TextInput.CursorPos, pos.Y}
            end
        end

        if #tostring(text) == 0 then
            Drawing.DrawCharacters(pos.X + 1, pos.Y, self.Placeholder, colours.lightGrey, self.BackgroundColour)
        else
            Drawing.DrawCharacters(pos.X + 1, pos.Y, text, self.TextColour, self.BackgroundColour)
        end

        term.setCursorBlink(true)

        Current.CursorColour = self.TextColour
    end,

    Initialise = function(self, x, y, width, height, parent, text, backgroundColour, textColour, done, numerical)
        local new = {}    -- the new instance
        setmetatable( new, {__index = self} )
        height = height or 1
        new.Width = width or #text + 2
        new.Height = height
        new.Y = y
        new.X = x
        new.TextInput = TextInput:Initialise(text or '', function(key)
            if done then
                done(key)
            end
            Draw()
        end, numerical)
        new.BackgroundColour = backgroundColour or colours.lightGrey
        new.TextColour = textColour or colours.black
        new.Parent = parent
        return new
    end,

    Click = function(self, side, x, y)
        Current.Input = self.TextInput
        self:Draw()
    end
}

TextInput = {
    Value = "",
    Change = nil,
    CursorPos = nil,
    Numerical = false,
    IsDocument = nil,

    Initialise = function(self, value, change, numerical, isDocument)
        local new = {}    -- the new instance
        setmetatable( new, {__index = self} )
        new.Value = tostring(value)
        new.Change = change
        new.CursorPos = #tostring(value)
        new.Numerical = numerical
        new.IsDocument = isDocument or false
        return new
    end,

    Insert = function(self, str)
        if self.Numerical then
            str = tostring(tonumber(str))
        end

        local selection = OrderSelection()

        if self.IsDocument and selection then
            self.Value = string.sub(self.Value, 1, selection[1]-1) .. str .. string.sub( self.Value, selection[2]+2)
            self.CursorPos = selection[1]
            Current.Selection = nil
        else
            local _, newLineAdjust = string.gsub(self.Value:sub(1, self.CursorPos), '\n','')

            self.Value = string.sub(self.Value, 1, self.CursorPos + newLineAdjust) .. str .. string.sub( self.Value, self.CursorPos + 1  + newLineAdjust)
            self.CursorPos = self.CursorPos + 1
        end

        self.Change(key)
    end,

    Extract = function(self, remove)
        local selection = OrderSelection()
        if self.IsDocument and selection then
            local _, newLineAdjust = string.gsub(self.Value:sub(selection[1], selection[2]), '\n','')
            local str = string.sub(self.Value, selection[1], selection[2]+1+newLineAdjust)
            if remove then
                self.Value = string.sub(self.Value, 1, selection[1]-1) .. string.sub( self.Value, selection[2]+2+newLineAdjust)
                self.CursorPos = selection[1] - 1
                Current.Selection = nil
            end
            return str
        end
    end,

    Char = function(self, char)
        if char == 'nil' then
            return
        end
        self:Insert(char)
    end,

    Key = function(self, key)
        if key == keys.enter then
            if self.IsDocument then
                self.Value = string.sub(self.Value, 1, self.CursorPos ) .. '\n' .. string.sub( self.Value, self.CursorPos + 1 )
                self.CursorPos = self.CursorPos + 1
            end
            self.Change(key)
        elseif key == keys.left then
            -- Left
            if self.CursorPos > 0 then
                local colShift = FindColours(string.sub( self.Value, self.CursorPos, self.CursorPos))
                self.CursorPos = self.CursorPos - 1 - colShift
                self.Change(key)
            end

        elseif key == keys.right then
            -- Right
            if self.CursorPos < string.len(self.Value) then
                local colShift = FindColours(string.sub( self.Value, self.CursorPos+1, self.CursorPos+1))
                self.CursorPos = self.CursorPos + 1 + colShift
                self.Change(key)
            end

        elseif key == keys.backspace then
            -- Backspace
            if self.IsDocument and Current.Selection then
                self:Extract(true)
                self.Change(key)
            elseif self.CursorPos > 0 then
                local colShift = FindColours(string.sub( self.Value, self.CursorPos, self.CursorPos))
                local _, newLineAdjust = string.gsub(self.Value:sub(1, self.CursorPos), '\n','')

                self.Value = string.sub( self.Value, 1, self.CursorPos - 1 - colShift + newLineAdjust) .. string.sub( self.Value, self.CursorPos + 1 - colShift + newLineAdjust)
                self.CursorPos = self.CursorPos - 1 - colShift
                self.Change(key)
            end
        elseif key == keys.home then
            -- Home
            self.CursorPos = 0
            self.Change(key)
        elseif key == keys.delete then
            if self.IsDocument and Current.Selection then
                self:Extract(true)
                self.Change(key)
            elseif self.CursorPos < string.len(self.Value) then
                self.Value = string.sub( self.Value, 1, self.CursorPos ) .. string.sub( self.Value, self.CursorPos + 2 )
                self.Change(key)
            end
        elseif key == keys["end"] then
            -- End
            self.CursorPos = string.len(self.Value)
            self.Change(key)
        elseif key == keys.up and self.IsDocument then
            -- Up
            if Current.Document.CursorPos then
                local page = Current.Document.Pages[Current.Document.CursorPos.Page]
                self.CursorPos = page:GetCursorPosFromPoint(Current.Document.CursorPos.Collum + page.MarginX, Current.Document.CursorPos.Line - page.MarginY - 1 + Current.Document.ScrollBar.Scroll, true)
                self.Change(key)
            end
        elseif key == keys.down and self.IsDocument then
            -- Down
            if Current.Document.CursorPos then
                local page = Current.Document.Pages[Current.Document.CursorPos.Page]
                self.CursorPos = page:GetCursorPosFromPoint(Current.Document.CursorPos.Collum + page.MarginX, Current.Document.CursorPos.Line - page.MarginY + 1 + Current.Document.ScrollBar.Scroll, true)
                self.Change(key)
            end
        end
    end
}

local Capitalise = function(str)
    return str:sub(1, 1):upper() .. str:sub(2, -1)
end


local getNames = peripheral.getNames or function()
    local tResults = {}
    for n,sSide in ipairs( rs.getSides() ) do
        if peripheral.isPresent( sSide ) then
            table.insert( tResults, sSide )
            local isWireless = false
            if not pcall(function()isWireless = peripheral.call(sSide, 'isWireless') end) then
                isWireless = true
            end
            if peripheral.getType( sSide ) == "modem" and not isWireless then
                local tRemote = peripheral.call( sSide, "getNamesRemote" )
                for n,sName in ipairs( tRemote ) do
                    table.insert( tResults, sName )
                end
            end
        end
    end
    return tResults
end

Peripheral = {
    GetPeripheral = function(_type)
        for i, p in ipairs(Peripheral.GetPeripherals()) do
            if p.Type == _type then
                return p
            end
        end
    end,

    Call = function(type, ...)
        local tArgs = {...}
        local p = Peripheral.GetPeripheral(type)
        peripheral.call(p.Side, unpack(tArgs))
    end,

    GetPeripherals = function(filterType)
        local peripherals = {}
        for i, side in ipairs(getNames()) do
            local name = peripheral.getType(side):gsub("^%l", string.upper)
            local code = string.upper(side:sub(1,1))
            if side:find('_') then
                code = side:sub(side:find('_')+1)
            end

            local dupe = false
            for i, v in ipairs(peripherals) do
                if v[1] == name .. ' ' .. code then
                    dupe = true
                end
            end

            if not dupe then
                local _type = peripheral.getType(side)
                local isWireless = false
                if _type == 'modem' then
                    if not pcall(function()isWireless = peripheral.call(sSide, 'isWireless') end) then
                        isWireless = true
                    end
                    if isWireless then
                        _type = 'wireless_modem'
                        name = 'W '..name
                    end
                end
                if not filterType or _type == filterType then
                    table.insert(peripherals, {Name = name:sub(1,8) .. ' '..code, Fullname = name .. ' ('..side:sub(1, 1):upper() .. side:sub(2, -1)..')', Side = side, Type = _type, Wireless = isWireless})
                end
            end
        end
        return peripherals
    end,

    PresentNamed = function(name)
        return peripheral.isPresent(name)
    end,

    CallType = function(type, ...)
        local tArgs = {...}
        local p = Peripheral.GetPeripheral(type)
        return peripheral.call(p.Side, unpack(tArgs))
    end,

    CallNamed = function(name, ...)
        local tArgs = {...}
        return peripheral.call(name, unpack(tArgs))
    end
}

Wireless = {
    Channels = {
        UltimateDoorlockPing = 4210,
        UltimateDoorlockRequest = 4211,
        UltimateDoorlockRequestReply = 4212,
    },

    isOpen = function(channel)
        return Peripheral.CallType('wireless_modem', 'isOpen', channel)
    end,

    Open = function(channel)
        if not Wireless.isOpen(channel) then
            Peripheral.CallType('wireless_modem', 'open', channel)
        end
    end,

    close = function(channel)
        Peripheral.CallType('wireless_modem', 'close', channel)
    end,

    closeAll = function()
        Peripheral.CallType('wireless_modem', 'closeAll')
    end,

    transmit = function(channel, replyChannel, message)
        Peripheral.CallType('wireless_modem', 'transmit', channel, replyChannel, textutils.serialize(message))
    end,

    Present = function()
        if Peripheral.GetPeripheral('wireless_modem') == nil then
            return false
        else
            return true
        end
    end,

    FormatMessage = function(message, messageID, destinationID)
        return {
            content = textutils.serialize(message),
            senderID = os.getComputerID(),
            senderName = os.getComputerLabel(),
            channel = channel,
            replyChannel = reply,
            messageID = messageID or math.random(10000),
            destinationID = destinationID
        }
    end,

    Timeout = function(func, time)
        time = time or 1
        parallel.waitForAny(func, function()
            sleep(time)
            --log('Timeout!'..time)
        end)
    end,

    RecieveMessage = function(_channel, messageID, timeout)
        open(_channel)
        local done = false
        local event, side, channel, replyChannel, message = nil
        Timeout(function()
            while not done do
                event, side, channel, replyChannel, message = os.pullEvent('modem_message')
                if channel ~= _channel then
                    event, side, channel, replyChannel, message = nil
                else
                    message = textutils.unserialize(message)
                    message.content = textutils.unserialize(message.content)
                    if messageID and messageID ~= message.messageID or (message.destinationID ~= nil and message.destinationID ~= os.getComputerID()) then
                        event, side, channel, replyChannel, message = nil
                    else
                        done = true
                    end
                end
            end
        end,
        timeout)
        return event, side, channel, replyChannel, message
    end,

    Initialise = function()
        if Wireless.Present() then
            for i, c in pairs(Wireless.Channels) do
                Wireless.Open(c)
            end
        end
    end,

    HandleMessage = function(event, side, channel, replyChannel, message, distance)
        message = textutils.unserialize(message)
        message.content = textutils.unserialize(message.content)

        if channel == Wireless.Channels.Ping then
            if message.content == 'Ping!' then
                SendMessage(replyChannel, 'Pong!', nil, message.messageID)
            end
        elseif message.destinationID ~= nil and message.destinationID ~= os.getComputerID() then
        elseif Wireless.Responder then
            Wireless.Responder(event, side, channel, replyChannel, message, distance)
        end
    end,

    SendMessage = function(channel, message, reply, messageID, destinationID)
        reply = reply or channel + 1
        Wireless.Open(channel)
        Wireless.Open(reply)
        local _message = Wireless.FormatMessage(message, messageID, destinationID)
        Wireless.transmit(channel, reply, _message)
        return _message
    end,

    Ping = function()
        local message = SendMessage(Channels.Ping, 'Ping!', Channels.PingReply)
        RecieveMessage(Channels.PingReply, message.messageID)
    end
}

function GetAbsolutePosition(object)
    local obj = object
    local i = 0
    local x = 1
    local y = 1
    while true do
        x = x + obj.X - 1
        y = y + obj.Y - 1

        if not obj.Parent then
            return {X = x, Y = y}
        end

        obj = obj.Parent

        if i > 32 then
            return {X = 1, Y = 1}
        end

        i = i + 1
    end

end

function Draw()
    Drawing.Clear(colours.white)

    if Current.StatusScreen then
        Drawing.DrawCharactersCenter(1, -2, nil, nil, Current.HeaderText, colours.blue, colours.white)
        Drawing.DrawCharactersCenter(1, -1, nil, nil, 'by oeed', colours.lightGrey, colours.white)
        Drawing.DrawCharactersCenter(1, 1, nil, nil, Current.StatusText, Current.StatusColour, colours.white)
    end

    if Current.ButtonOne then
        Current.ButtonOne:Draw()
    end

    if Current.ButtonTwo then
        Current.ButtonTwo:Draw()
    end

    for i, v in ipairs(Current.PageControls) do
        v:Draw()
    end

    Drawing.DrawBuffer()

    if Current.TextInput and Current.CursorPos and not Current.Menu and not(Current.Window and Current.Document and Current.TextInput == Current.Document.TextInput) and Current.CursorPos[2] > 1 then
        term.setCursorPos(Current.CursorPos[1], Current.CursorPos[2])
        term.setCursorBlink(true)
        term.setTextColour(Current.CursorColour)
    else
        term.setCursorBlink(false)
    end
end
MainDraw = Draw

function GenerateFingerprint()
    local str = ""
    for _ = 1, 256 do
        local char = math.random(32, 126)
        --if char == 96 then char = math.random(32, 95) end
        str = str .. string.char(char)
    end
    return str
end

function MakeFingerprint()
    local h = fs.open('.fingerprint', 'w')
    if h then
        h.write(GenerateFingerprint())
    end
    h.close()
    Current.Fingerprint = str
end

local drawTimer = nil
function SetText(header, status, colour, isReset)
    if header then
        Current.HeaderText = header
    end
    if status then
        Current.StatusText = status
    end
    if colour then
        Current.StatusColour = colour
    end
    Draw()
    if not isReset then
        statusResetTimer = os.startTimer(2)
    end
end

function ResetStatus()
    if pocket then
        if Current.Locked then
            SetText('Ultimate Door Lock', 'Add Wireless Modem to PDA', colours.red, true)
        else
            SetText('Ultimate Door Lock', 'Ready', colours.grey, true)
        end
    else
        if Current.Locked then
            SetText('Ultimate Door Lock', ' Attach a Wireless Modem then reboot', colours.red, true)
        else
            SetText('Ultimate Door Lock', 'Ready', colours.grey, true)
        end
    end
end

function ResetPage()
    Wireless.Responder = function()end
    pingTimer = nil
    Current.PageControls = nil
    Current.StatusScreen = false
    Current.ButtonOne = nil
    Current.ButtonTwo = nil
    Current.PageControls = {}
    CloseDoor()
end

function PocketInitialise()
    Current.ButtonOne = Button:Initialise(Drawing.Screen.Width - 6, Drawing.Screen.Height - 1, nil, nil, nil, nil, Quit, 'Quit', colours.black)
    if not Wireless.Present() then
        Current.Locked = true
        ResetStatus()
        return
    end
    Wireless.Initialise()
    ResetStatus()
    if fs.exists('.fingerprint') then
        local h = fs.open('.fingerprint', 'r')
        if h then
            Current.Fingerprint = h.readAll()
        else
            MakeFingerprint()
        end
        h.close()
    else
        MakeFingerprint()
    end

    Wireless.Responder = function(event, side, channel, replyChannel, message, distance)
        if channel == Wireless.Channels.UltimateDoorlockPing then
            Wireless.SendMessage(Wireless.Channels.UltimateDoorlockRequest, Current.Fingerprint, Wireless.Channels.UltimateDoorlockRequestReply, nil, message.senderID)
        elseif channel == Wireless.Channels.UltimateDoorlockRequestReply then
            if message.content == true then
                SetText(nil, 'Opening Door', colours.green)
            else
                SetText(nil, ' Access Denied', colours.red)
            end
        end
    end
end

function FingerprintIsOnWhitelist(fingerprint)
    if Current.Settings.Whitelist then
        for i, f in ipairs(Current.Settings.Whitelist) do
            if f == fingerprint then
                return true
            end
        end
    end
    return false
end

function SaveSettings()
    Current.Settings = Current.Settings or {}
    local h = fs.open('.settings', 'w')
    if h then
        h.write(textutils.serialize(Current.Settings))
    end
    h.close()
end

local closeDoorTimer = nil
function OpenDoor()
    if Current.Settings and Current.Settings.RedstoneSide then
        SetText(nil, 'Opening Door', colours.green)
        redstone.setOutput(Current.Settings.RedstoneSide, true)
        closeDoorTimer = os.startTimer(0.6)
    end
end

function CloseDoor()
    if Current.Settings and Current.Settings.RedstoneSide then
        if redstone.getOutput(Current.Settings.RedstoneSide) then
            SetText(nil, 'Closing Door', colours.orange)
            redstone.setOutput(Current.Settings.RedstoneSide, false)
        end
    end
end

DefaultSettings = {
    Whitelist = {},
    RedstoneSide = 'back',
    Distance = 10
}

function RegisterPDA(event, drive)
    if disk.hasData(drive) then
        local _fs = fs
        if OneOS then
            _fs = OneOS.FS
        end
        local path = disk.getMountPath(drive)
        local addStartup = true
        if _fs.exists(path..'/System/') then
            path = path..'/System/'
            addStartup = false
        end
        local fingerprint = nil
        if _fs.exists(path..'/.fingerprint') then
            local h = _fs.open(path..'/.fingerprint', 'r')
            if h then
                local str = h.readAll()
                if #str == 256 then
                    fingerprint = str
                end
            end
            h.close()
        end
        if not fingerprint then
            fingerprint = GenerateFingerprint()
            local h = _fs.open(path..'/.fingerprint', 'w')
            h.write(fingerprint)
            h.close()
            if addStartup then
                local h = fs.open(shell.getRunningProgram(), 'r')
                local startup = h.readAll()
                h.close()
                local h = _fs.open(path..'/startup', 'w')
                h.write(startup)
                h.close()
            end
        end
        if not FingerprintIsOnWhitelist(fingerprint) then
            table.insert(Current.Settings.Whitelist, fingerprint)
            SaveSettings()
        end
        disk.eject(drive)
        SetText(nil, 'Registered Pocket Computer', colours.green)
    end
end

function HostSetup()
    ResetPage()
    Current.Page = 'HostSetup'
    Current.ButtonTwo = Button:Initialise(Drawing.Screen.Width - 6, Drawing.Screen.Height - 1, nil, nil, nil, nil, HostStatusPage, 'Save', colours.black)
    if not Current.Settings then
        Current.Settings = DefaultSettings
    end

    local sideButtons = {}
    local function resetSideToggle(self)
        for i, v in ipairs(sideButtons) do
            if v.Toggle ~= nil then
                v.Toggle = false
            end
        end
        Current.Settings.RedstoneSide = self.Text:lower()
        SaveSettings()
    end

    table.insert(Current.PageControls, Label:Initialise(2, 2, 'Redstone Side'))
    sideButtons = {
        Button:Initialise(2, 4, nil, nil, nil, nil, resetSideToggle, 'Back', colours.black, false, colours.green),
        Button:Initialise(9, 4, nil, nil, nil, nil, resetSideToggle, 'Front', colours.black, false, colours.green),
        Button:Initialise(2, 6, nil, nil, nil, nil, resetSideToggle, 'Left', colours.black, false, colours.green),
        Button:Initialise(9, 6, nil, nil, nil, nil, resetSideToggle, 'Right', colours.black, false, colours.green),
        Button:Initialise(2, 8, nil, nil, nil, nil, resetSideToggle, 'Top', colours.black, false, colours.green),
        Button:Initialise(8, 8, nil, nil, nil, nil, resetSideToggle, 'Bottom', colours.black, false, colours.green)
    }
    for i, v in ipairs(sideButtons) do
        if v.Text:lower() == Current.Settings.RedstoneSide then
            v.Toggle = true
        end
        table.insert(Current.PageControls, v)
    end

    local distanceButtons = {}
    local function resetDistanceToggle(self)
        for i, v in ipairs(distanceButtons) do
            if v.Toggle ~= nil then
                v.Toggle = false
            end
        end
        if self.Text == 'Small' then
            Current.Settings.Distance = 5
        elseif self.Text == 'Normal' then
            Current.Settings.Distance = 10
        elseif self.Text == 'Far' then
            Current.Settings.Distance = 15
        end
        SaveSettings()
    end

    table.insert(Current.PageControls, Label:Initialise(23, 2, 'Opening Distance'))
    distanceButtons = {
        Button:Initialise(23, 4, nil, nil, nil, nil, resetDistanceToggle, 'Small', colours.black, false, colours.green),
        Button:Initialise(31, 4, nil, nil, nil, nil, resetDistanceToggle, 'Normal', colours.black, false, colours.green),
        Button:Initialise(40, 4, nil, nil, nil, nil, resetDistanceToggle, 'Far', colours.black, false, colours.green)
    }
    for i, v in ipairs(distanceButtons) do
        if v.Text == 'Small' and Current.Settings.Distance == 5 then
            v.Toggle = true
        elseif v.Text == 'Normal' and Current.Settings.Distance == 10 then
            v.Toggle = true
        elseif v.Text == 'Far' and Current.Settings.Distance == 15 then
            v.Toggle = true
        end
        table.insert(Current.PageControls, v)
    end

    table.insert(Current.PageControls, Label:Initialise(2, 10, 'Registered PDAs: '..#Current.Settings.Whitelist))
    table.insert(Current.PageControls, Button:Initialise(2, 12, nil, nil, nil, nil, function()Current.Settings.Whitelist = {}HostSetup()end, 'Unregister All', colours.black))


    table.insert(Current.PageControls, Label:Initialise(23, 6, 'Help', colours.black))
    local helpLines = {
        Label:Initialise(23, 8, 'To register a new PDA simply', colours.black),
        Label:Initialise(23, 9, 'place a Disk Drive next to', colours.black),
        Label:Initialise(23, 10, 'the computer, then put the', colours.black),
        Label:Initialise(23, 11, 'PDA in the Drive, it will', colours.black),
        Label:Initialise(23, 12, 'register automatically. If', colours.black),
        Label:Initialise(23, 13, 'it worked it will eject.', colours.black),
        Label:Initialise(23, 15, 'Make sure you hide this', colours.red),
        Label:Initialise(23, 16, 'computer away from the', colours.red),
        Label:Initialise(23, 17, 'door! (other people)', colours.red)
    }
    for i, v in ipairs(helpLines) do
        table.insert(Current.PageControls, v)
    end


    table.insert(Current.PageControls, Button:Initialise(2, 14, nil, nil, nil, nil, function()
        for i = 1, 6 do
            helpLines[i].TextColour = colours.green
        end
    end, 'Register New PDA', colours.black))

end

function HostStatusPage()
    ResetPage()
    Current.Page = 'HostStatus'
    Current.StatusScreen = true
    Current.ButtonOne = Button:Initialise(Drawing.Screen.Width - 6, Drawing.Screen.Height - 1, nil, nil, nil, nil, Quit, 'Quit', colours.black)
    Current.ButtonTwo = Button:Initialise(2, Drawing.Screen.Height - 1, nil, nil, nil, nil, HostSetup, 'Settings/Help', colours.black)

    Wireless.Responder = function(event, side, channel, replyChannel, message, distance)
        if channel == Wireless.Channels.UltimateDoorlockRequest and distance < Current.Settings.Distance then
            if FingerprintIsOnWhitelist(message.content) then
                OpenDoor()
                Wireless.SendMessage(Wireless.Channels.UltimateDoorlockRequestReply, true)
            else
                Wireless.SendMessage(Wireless.Channels.UltimateDoorlockRequestReply, false)
            end
        end
    end

    PingPocketComputers()
end

function HostInitialise()
    if not Wireless.Present() then
        Current.Locked = true
        Current.ButtonOne = Button:Initialise(Drawing.Screen.Width - 6, Drawing.Screen.Height - 1, nil, nil, nil, nil, Quit, 'Quit', colours.black)
        Current.ButtonTwo = Button:Initialise(2, Drawing.Screen.Height - 1, nil, nil, nil, nil, function()os.reboot()end, 'Reboot', colours.black)
        ResetStatus()
        return
    end
    Wireless.Initialise()
    ResetStatus()
    if fs.exists('.settings') then
        local h = fs.open('.settings', 'r')
        if h then
            Current.Settings = textutils.unserialize(h.readAll())
        end
        h.close()
        HostStatusPage()
    else
        HostSetup()
    end
    if OneOS then
        OneOS.CanClose = function()
            CloseDoor()
            return true
        end
    end
end

local pingTimer = nil
function PingPocketComputers()
    Wireless.SendMessage(Wireless.Channels.UltimateDoorlockPing, 'Ping!', Wireless.Channels.UltimateDoorlockRequest)
    pingTimer = os.startTimer(0.5)
end

function Initialise(arg)
    EventRegister('mouse_click', TryClick)
    EventRegister('mouse_drag', function(event, side, x, y)TryClick(event, side, x, y, true)end)
    EventRegister('mouse_scroll', Scroll)
    EventRegister('key', HandleKey)
    EventRegister('char', HandleKey)
    EventRegister('timer', Timer)
    EventRegister('terminate', function(event) if Close() then error( "Terminated", 0 ) end end)
    EventRegister('modem_message', Wireless.HandleMessage)
    EventRegister('disk', RegisterPDA)

    if OneOS then
        OneOS.RequestRunAtStartup()
    end

    if pocket then
        PocketInitialise()
    else
        HostInitialise()
    end


    Draw()

    EventHandler()
end

function Timer(event, timer)
    if timer == pingTimer then
        PingPocketComputers()
    elseif timer == closeDoorTimer then
        CloseDoor()
    elseif timer == statusResetTimer then
        ResetStatus()
    end
end

local ignoreNextChar = false
function HandleKey(...)
    local args = {...}
    local event = args[1]
    local keychar = args[2]
    --[[
                                                                                            --Mac left command character
    if event == 'key' and keychar == keys.leftCtrl or keychar == keys.rightCtrl or keychar == 219 then
        isControlPushed = true
        controlPushedTimer = os.startTimer(0.5)
    elseif isControlPushed then
        if event == 'key' then
            if CheckKeyboardShortcut(keychar) then
                isControlPushed = false
                ignoreNextChar = true
            end
        end
    elseif ignoreNextChar then
        ignoreNextChar = false
    elseif Current.TextInput then
        if event == 'char' then
            Current.TextInput:Char(keychar)
        elseif event == 'key' then
            Current.TextInput:Key(keychar)
        end
    end
    ]]--
end

--[[
    Check if the given object falls under the click coordinates
]]--
function CheckClick(object, x, y)
    if object.X <= x and object.Y <= y and object.X + object.Width > x and object.Y + object.Height > y then
        return true
    end
end

--[[
    Attempt to clicka given object
]]--
function DoClick(object, side, x, y, drag)
    local obj = GetAbsolutePosition(object)
    obj.Width = object.Width
    obj.Height = object.Height
    if object and CheckClick(obj, x, y) then
        return object:Click(side, x - object.X + 1, y - object.Y + 1, drag)
    end
end

--[[
    Try to click at the given coordinates
]]--
function TryClick(event, side, x, y, drag)
    if Current.ButtonOne then
        if DoClick(Current.ButtonOne, side, x, y, drag) then
            Draw()
            return
        end
    end

    if Current.ButtonTwo then
        if DoClick(Current.ButtonTwo, side, x, y, drag) then
            Draw()
            return
        end
    end

    for i, v in ipairs(Current.PageControls) do
        if DoClick(v, side, x, y, drag) then
            Draw()
            return
        end
    end

    Draw()
end

function Scroll(event, direction, x, y)
    if Current.Window and Current.Window.OpenButton then
        Current.Document.Scroll = Current.Document.Scroll + direction
        if Current.Window.Scroll < 0 then
            Current.Window.Scroll = 0
        elseif Current.Window.Scroll > Current.Window.MaxScroll then
            Current.Window.Scroll = Current.Window.MaxScroll
        end
        Draw()
    elseif Current.ScrollBar then
        if Current.ScrollBar:DoScroll(direction*2) then
            Draw()
        end
    end
end

--[[
    Registers functions to run on certain events
]]--
function EventRegister(event, func)
    if not Events[event] then
        Events[event] = {}
    end

    table.insert(Events[event], func)
end

--[[
    The main loop event handler, runs registered event functinos
]]--
function EventHandler()
    while isRunning do
        local event, arg1, arg2, arg3, arg4, arg5, arg6 = os.pullEventRaw()
        if Events[event] then
            for i, e in ipairs(Events[event]) do
                e(event, arg1, arg2, arg3, arg4, arg5, arg6)
            end
        end
    end
end

function Quit()
    isRunning = false
    term.setCursorPos(1,1)
    term.setBackgroundColour(colours.black)
    term.setTextColour(colours.white)
    term.clear()
    if OneOS then
        OneOS.Close()
    end
end

if not term.current then -- if not 1.6
    print('Because it requires pocket computers, Ultimate Door Lock requires ComputerCraft 1.6. Please update to 1.6 to use Ultimate Door Lock.')
elseif not (OneOS and pocket) and term.isColor and term.isColor() then
    -- If the program crashes close the door and reboot
    local _, err = pcall(Initialise)
    if err then
        CloseDoor()
        term.setCursorPos(1,1)
        term.setBackgroundColour(colours.black)
        term.setTextColour(colours.white)
        term.clear()
        print('Ultimate Door Lock has crashed')
        print('To maintain security, the computer will reboot.')
        print('If you are seeing this alot try turning off all Pocket Computers or reinstall.')
        print()
        print('Error:')
        printError(err)
        sleep(5)
        os.reboot()
    end
elseif OneOS and pocket then
    term.setCursorPos(1,3)
    term.setBackgroundColour(colours.white)
    term.setTextColour(colours.blue)
    term.clear()
    print('OneOS already acts as a door key. Simply place your PDA in the door\'s disk drive to register it.')
    print()
    print('To setup a door, run this program on an advanced computer (non-pocket).')
    print()
    print('Click anywhere to quit')
    os.pullEvent('mouse_click')
    Quit()
else
    print('Ultimate Door Lock requires an advanced (gold) computer or pocket computer.')
end