-- RF Control Center (RFCC) v0.3
--     by dlord


-- Main configuration
local tArgs = {...}
local CONFIG_FILE = "power_conf"

local CONFIG_TEMPLATE = [[-- adjust these configuration options as necessary.
-- delay for checking all capacitors
TICK_DELAY = ${tickDelay}

-- threshold in percentages
GREEN_ZONE = ${greenZone}
YELLOW_ZONE = ${yellowZone}

NORMAL_POWER_THRESHOLD = ${nomalPowerThreshold}
LOW_POWER_THRESHOLD = ${lowPowerThreshold}

-- configures what side to emit when low power
-- a valid side is required.
SIDE_TO_EMIT_REDSTONE_ON_LOW_POWER = "${sideForRedstone}"

-- Active monitors on startup
MONITORS_ACTIVE = ${monitorsActive}
]]

local MONITORS_ACTIVE = {}

do
    if #tArgs > 0 and tArgs[1] == "update" then
        print("Updating RFCC...")
        local updateFile = "/rfcc_update"
        local pastebinKey = "TfeHE7Wy"
        shell.run("pastebin", "get", pastebinKey, updateFile)

        if fs.exists(updateFile) then
            local programPath = shell.getRunningProgram()
            fs.delete(programPath)
            fs.move(updateFile, programPath)
            print("Success!")
            return
        else
            print("Unable to retrieve update from pastebin.")
            print("Check your connection, and try again.")
            error()
        end
    end
end

local function interpolate(s, params)
    return s:gsub('($%b{})', function(w) return params[w:sub(3, -2)] or w end)
end

local function saveSettings()
    local h = fs.open("/"..CONFIG_FILE, "w")

    local settings = {
        tickDelay = TICK_DELAY or 100,
        greenZone = GREEN_ZONE or 70,
        yellowZone = YELLOW_ZONE or 30,
        nomalPowerThreshold = NORMAL_POWER_THRESHOLD or 90,
        lowPowerThreshold = LOW_POWER_THRESHOLD or 10,
        sideForRedstone = SIDE_TO_EMIT_REDSTONE_ON_LOW_POWER or "bottom",
        monitorsActive = textutils.serialize(MONITORS_ACTIVE)
    }

    h.write(interpolate(CONFIG_TEMPLATE, settings))
    h.close()
end


if fs.exists(CONFIG_FILE) == false then
    print("I can't find my configuration file.")
    print("Generating one for you.")

    saveSettings()

    print("")
    print("Configuration file is located at /"..CONFIG_FILE)
    print("You may edit this file to change my default settings.")
    print("Once satisfied, run me again.")
    return
else
    os.unloadAPI(CONFIG_FILE)

    if os.loadAPI("/"..CONFIG_FILE) == false then
        error("Could not load the config file!")
    end

    CONFIG = nil
    for k, v in pairs(_G) do
        if k == CONFIG_FILE then
            CONFIG = v
            break
        end
    end

    if CONFIG == nil then
        print("I could not find the necessary config.")
        print("You probably screwed something up.")
        error()
    end
end

term.setCursorPos(1, 1)
term.clear()
print("Starting RF Control Center...")
sleep(2)

-- Constants
local GET_ENERGY_STORED_FUNCTION="getEnergyStored"
local GET_MAX_ENERGY_STORED_FUNCTION="getMaxEnergyStored"

local TICK_DELAY = CONFIG.TICK_DELAY
local PAUSE_TIME_IN_SECONDS = TICK_DELAY / 20

-- threshold in percentages
local GREEN_ZONE = CONFIG.GREEN_ZONE
local YELLOW_ZONE = CONFIG.YELLOW_ZONE

local NORMAL_POWER_THRESHOLD = CONFIG.NORMAL_POWER_THRESHOLD
local LOW_POWER_THRESHOLD = CONFIG.LOW_POWER_THRESHOLD

-- configures what side to emit when low power
local SIDE_TO_EMIT_REDSTONE_ON_LOW_POWER = CONFIG.SIDE_TO_EMIT_REDSTONE_ON_LOW_POWER

MONITORS_ACTIVE = CONFIG.MONITORS_ACTIVE

-- state variables
local clickableLines = {}
local clickableOutputMonitors = {}
local monitors = {}
local capacitors = {}
local dashboardButtons = {}
local totalEnergyAvailable, totalCapacity, totalFlowRate = 0, 0, 0

-- Capacitor basic functions
do
    capacitors.add = function(params)
        table.insert(capacitors, params)
    end

    capacitors.get = function(name)
        for i, v in ipairs(capacitors) do
            if name == v.name then
                return v
            end
        end

        return nil
    end

    capacitors.remove = function(name)
        local found = nil
        for i, v in ipairs(capacitors) do
            if name == v.name then
                found = i
                break
            end
        end

        if found then
            table.remove(capacitors, found)
        end
    end

    capacitors.clear = function()
        for i, v in ipairs(capacitors) do
            capacitors[i] = nil
        end
    end
end


-- Special Windows
local nativeDisplayTabs = {}
local nativeMonitorTabWindow
local consoleWindow
local monitorSelectionWindow

do
    local nativeTerm = term.native()
    local width, height = term.getSize()
    local x, y = 1, 2
    local newWidth, newHeight = width, height - 1

    nativeTerm.setCursorPos(x, y)

    nativeMonitorTabWindow = window.create(nativeTerm, 1, 1, width, 1, false)

    consoleWindow = window.create(nativeTerm, x, y, newWidth, newHeight, false)
    consoleWindow.active = true

    monitorSelectionWindow = window.create(nativeTerm, x, y, newWidth, newHeight, false)
    monitorSelectionWindow.active = true
end

-- TODO: break up this humongous script into smaller chunks that can be loaded
--       via os.loadAPI().


-- basic functions
local function tableSize(targetTable)
    local i = 0
    for k, v in pairs(targetTable) do
        i = i + 1
    end

    return i
end

local function padRight(text, width, padCharacter)
    if width == nil then
        width = term.getSize()
    end

    padCount = width - string.len(text)

    if padCharacter == nil then
        padCharacter = " "
    end

    if padCount > 0 then
        return text..string.rep(padCharacter, padCount)
    else
        return text
    end
end

local function padLeft(text, width, padCharacter)
    if width == nil then
        width = term.getSize()
    end

    padCount = width - string.len(text)

    if padCharacter == nil then
        padCharacter = " "
    end

    if padCount > 0 then
        return string.rep(padCharacter, padCount)..text
    else
        return text
    end
end

local function printZoneText(percent, callback)
    if percent >= GREEN_ZONE then
        term.setTextColor(colors.green)
    elseif percent >= YELLOW_ZONE and percent < GREEN_ZONE then
        term.setTextColor(colors.yellow)
    else
        term.setTextColor(colors.red)
    end

    callback()

    term.setTextColor(colors.white)
end

local function resetRedstoneState()
    for k,v in pairs(rs.getSides()) do
        rs.setOutput(v, false)
    end
end
-- basic functions


-- line drawing API
local function drawVerticalLine(targetWindow, x, y, height)
    targetWindow.setCursorPos(x, y)

    targetWindow.setBackgroundColor(colors.blue)
    for i = 1, height do
        targetWindow.write(" ")
        targetWindow.setCursorPos(x, i)
    end
    targetWindow.setBackgroundColor(colors.black)
end

local function drawHorizontalLine(targetWindow, x, y, width)
    targetWindow.setCursorPos(x, y)
    targetWindow.setBackgroundColor(colors.blue)
    targetWindow.write(string.rep(" ", width))
    targetWindow.setBackgroundColor(colors.black)
end
-- line drawing API


-- window management
local console = {
    log = function(message)
        local currentTerm = term.current()
        term.redirect(consoleWindow)

        print(message)

        term.redirect(currentTerm)
    end
}

local function showWindows(...)
    for i, v in ipairs(arg) do
        if v.active == true then
            v.setVisible(true)
        else
            v.setVisible(false)
        end
    end
end

local function hideWindows(...)
    for i, v in ipairs(arg) do
        v.setVisible(false)
    end
end

local function getCursorPositionRelativeToParent(currentWindow)
    -- determine offset of current window from parent
    local x, y = currentWindow.getPosition()
    local xOffset, yOffset = x - 1, y - 1

    local cursorX, cursorY = currentWindow.getCursorPos()
    return cursorX + xOffset, cursorY + yOffset
end

local function createInformationWindow(parentWindow)
    local width, height = parentWindow.getSize()

    local widthOffset = 2
    local heightOffset = 2

    local windowWidth = width - (widthOffset * 2)
    local windowHeight = height - (heightOffset * 2)

    local informationWindow = window.create(parentWindow, 1 + widthOffset, 1 + heightOffset, windowWidth, windowHeight, false)
    informationWindow.active = false

    drawHorizontalLine(informationWindow, 1, 1, windowWidth)
    drawHorizontalLine(informationWindow, 1, windowHeight, windowWidth)

    drawVerticalLine(informationWindow, 1, 1, windowHeight)
    drawVerticalLine(informationWindow, windowWidth, 1, windowHeight)

    return informationWindow
end

local function createSummaryWindow(parentWindow, x, y)
    local width, height = parentWindow.getSize()

    -- we make use of the parent window's cursor position to make it more convenient.
    local x, y = parentWindow.getCursorPos()
    local newHeight = height - (y - 1)

    local summaryWindow = window.create(parentWindow, x, y, width, newHeight, false)
    summaryWindow.active = false

    return summaryWindow
end

local function printToWindow(targetWindow, widthOffset, text)
    local x, y = targetWindow.getCursorPos()
    local width, height = targetWindow.getSize()
    local maxTextSize = width - (widthOffset * 2)

    targetWindow.write(text:sub(1, maxTextSize))
    targetWindow.setCursorPos(x, y+1)
end

local function createDashboardWindows(parentWindow)
    -- order is important here!
    local summaryWindow = createSummaryWindow(parentWindow)
    summaryWindow.active = true
    local informationWindow = createInformationWindow(parentWindow)
    informationWindow.active = false

    local windows = {
        [1] = summaryWindow,
        [2] = informationWindow,

        getSummaryWindow = function()
            return summaryWindow
        end,

        getInformationWindow = function()
            return informationWindow
        end
    }

    return windows
end

local function initializeNativeDisplayTabs()
    local nativeTerm = term.native()
    nativeTerm.setCursorPos(1, 2)

    local dashboardWindows = createDashboardWindows(nativeTerm)

    table.insert(nativeDisplayTabs, {
        tab = {
            label = "Dashboard",
            event = "dashboard_clicked",
            active = true,
            startX = 0,
            startY = 0
        },

        windows = dashboardWindows
    })
    table.insert(nativeDisplayTabs, {
        tab = {
            label = "Monitors",
            event = "monitors_clicked",
            startX = 0,
            startY = 0
        },

        windows = { monitorSelectionWindow }
    })
    table.insert(nativeDisplayTabs, {
        tab = {
            label = "Console",
            event = "console_clicked",
            startX = 0,
            startY = 0
        },

        windows = { consoleWindow }
    })

    nativeDisplayTabs.getSelectedTab = function(x, y)
        if x == nil or y == nil then
            return nil
        end

        for i, v in ipairs(nativeDisplayTabs) do
            local tab = v.tab
            local withinX = x >= tab.startX and x <= tab.endX
            local withinY = y >= tab.startY and y <= tab.endY

            if withinX and withinY then
                return i
            end
        end

        return nil
    end

    nativeDisplayTabs.setSelectedTab = function(selected)
        for i, v in ipairs(nativeDisplayTabs) do
            if i == selected then
                v.tab.active = true
            else
                v.tab.active = false
            end
        end
    end

    nativeDisplayTabs.getActiveTab = function()
        for i, v in ipairs(nativeDisplayTabs) do
            if v.tab.active == true then
                return i
            end
        end
    end

    nativeDisplayTabs.getDashboardWindows = function()
        return dashboardWindows
    end
end

-- window management


-- capacitor management
local function addCapacitors(...)
    local peripheralList = arg

    if #peripheralList == 0 then
        peripheralList = peripheral.getNames()
        capacitors.clear()
    end

    for i, p in ipairs(peripheralList) do
        local currentPeripheral = peripheral.wrap(p)

        if currentPeripheral[GET_ENERGY_STORED_FUNCTION] ~= nil and currentPeripheral[GET_MAX_ENERGY_STORED_FUNCTION] ~= nil and currentPeripheral[GET_ENERGY_STORED_FUNCTION]("north") ~= nil then
            console.log("Adding new capacitor: "..p)
            capacitors.add({
                name = p,
                peripheral = currentPeripheral,
                lastReading = 0,
                flowRate = 0,
                percent = 0
            })
        end
    end
end

local function removeCapacitors(...)
    for i, k in ipairs(arg) do
        capacitors.remove(k)
    end
end

local function getReading()
    local totalEnergyAvailable, totalCapacity, totalFlowRate = 0, 0, 0

    for i, v in ipairs(capacitors) do
        local currentReading = v.peripheral[GET_ENERGY_STORED_FUNCTION]("north") or 0
        local capacity = v.peripheral[GET_MAX_ENERGY_STORED_FUNCTION]("north") or 0

        if currentReading ~= nil then
            v.flowRate = (currentReading - v.lastReading) / TICK_DELAY
            v.lastReading = currentReading

            if capacity == 0 then
                v.percent = 0
            else
                v.percent = math.floor((currentReading / capacity) * 100)
            end

            totalEnergyAvailable = totalEnergyAvailable + v.lastReading
            totalFlowRate = totalFlowRate + v.flowRate
        end

        totalCapacity = totalCapacity + capacity
    end

    local sortByLastReading = function(a, b)
        return a.percent > b.percent
    end

    table.sort(capacitors, sortByLastReading)

    return totalEnergyAvailable, totalCapacity, totalFlowRate
end

local function emitRedstoneSignalOnLowPower(percent)
    if percent < LOW_POWER_THRESHOLD and rs.getOutput(SIDE_TO_EMIT_REDSTONE_ON_LOW_POWER) == false then
        console.log("Low power threshold reached.")
        rs.setOutput(SIDE_TO_EMIT_REDSTONE_ON_LOW_POWER, true)
    elseif percent >= NORMAL_POWER_THRESHOLD and rs.getOutput(SIDE_TO_EMIT_REDSTONE_ON_LOW_POWER) == true then
        console.log("Back to normal power levels.")
        rs.setOutput(SIDE_TO_EMIT_REDSTONE_ON_LOW_POWER, false)
    end
end
-- capacitor management


-- monitor management
local function addMonitors(...)
    local monitorList = arg

    if #monitorList == 0 then
        monitorList = peripheral.getNames()
        monitors = {}
    end

    for i, m in ipairs(monitorList) do
        local currentPeripheral = peripheral.wrap(m)

        if "monitor" == peripheral.getType(m) and currentPeripheral.isColour() == true then
            console.log("Adding new monitor: "..m)
            currentPeripheral.setCursorPos(1, 1)
            monitors[m] = {
                peripheral = currentPeripheral,
                windows = createDashboardWindows(currentPeripheral),
                active = false
            }
        end
    end
end

local function removeMonitors(...)
    local activeMonitorsCount = tableSize(MONITORS_ACTIVE)

    for i, k in ipairs(arg) do
        monitors[k] = nil
        dashboardButtons[k] = nil
        MONITORS_ACTIVE[k] = nil
    end

    if activeMonitorsCount ~= tableSize(MONITORS_ACTIVE) then
        saveSettings()
    end
end
-- monitor management


-- hotplug system
local function doWhileMonitorSuspended(callback)
    os.queueEvent("pause_monitor")
    callback()
    os.queueEvent("resume_monitor")
end

local function hotplugPeripherals()
    while true do
        local event, name = os.pullEvent()
        local callback = nil

        if event == "peripheral" then
            console.log("Detected new peripheral: "..name)

            callback = function()
                addMonitors(name)
                addCapacitors(name)
            end
        elseif event == "peripheral_detach" then
            console.log("Peripheral removed: "..name)

            callback = function()
                removeMonitors(name)
                removeCapacitors(name)
            end
        elseif event == "monitor_resize" then
            console.log("Monitor resized: "..name)

            callback = function()
                monitors[name].peripheral.setCursorPos(1, 1)
                monitors[name].windows = createDashboardWindows(monitors[name].peripheral)
                dashboardButtons[name] = nil

                if monitors[name].active == true then
                    showWindows(unpack(monitors[name].windows))
                end
            end
        end

        if callback ~= nil then
            doWhileMonitorSuspended(callback)
        end
    end
end
-- hotplug system


-- information window for the capacitors
local function addClickableLine(monitorName, key, currentY)
    clickableLines[monitorName][key] = {
        line = currentY
    }
end

local function toggleInformationWindow(summaryWindow, informationWindow, capacitorName)
    if capacitorName == nil then
        summaryWindow.active = true
        informationWindow.active = false
    else
        summaryWindow.active = not summaryWindow.active
        informationWindow.active = not informationWindow.active
    end

    local capacitor = capacitors.get(capacitorName)

    if informationWindow.active == true then
        widthOffset = 3
        heightOffset = 3

        informationWindow.setCursorPos(widthOffset, heightOffset)
        local width, height = informationWindow.getSize()
        local labelWidth = width - (widthOffset * 2)
        local capacity = capacitor.peripheral[GET_MAX_ENERGY_STORED_FUNCTION]("north")

        printToWindow(informationWindow, widthOffset, "Capacitor name:")
        printToWindow(informationWindow, widthOffset, padRight("    "..capacitorName, labelWidth))
        printToWindow(informationWindow, widthOffset, "Capacitor type:")
        printToWindow(informationWindow, widthOffset, padRight("    "..peripheral.getType(capacitorName), labelWidth))
        printToWindow(informationWindow, widthOffset, "Capacity:")
        printToWindow(informationWindow, widthOffset, padRight("    "..capacity.." RF", labelWidth))
        printToWindow(informationWindow, widthOffset, "Available:")
        printToWindow(informationWindow, widthOffset, padRight("    "..capacitor.lastReading.." RF", labelWidth))

        local closeLabel = " Click anywhere to close "

        local x = math.floor(((width - string.len(closeLabel)) / 2 ) + 0.5)

        informationWindow.setCursorPos(x, height-2)

        informationWindow.setBackgroundColor(colors.red)
        informationWindow.write(closeLabel)
        informationWindow.setBackgroundColor(colors.black)
    end

    showWindows(summaryWindow, informationWindow)
end

local function checkForSelectableLine(monitorName, x, y)
    if clickableLines[monitorName] == nil then
        return nil
    end

    for k,v in pairs(clickableLines[monitorName]) do
        if y == v.line then
            return k
        end
    end

    return nil
end

local function getSelectedDashboardButton(monitorName, x, y)
    if x == nil or y == nil then
        return nil
    end

    local v = dashboardButtons[monitorName]

    local nextButtonSelected = (x >= v.next.startX and x <= v.next.endX) and (y >= v.next.startY and y <= v.next.endY)
    local prevButtonSelected = (x >= v.prev.startX and x <= v.prev.endX) and (y >= v.prev.startY and y <= v.prev.endY)

    if nextButtonSelected then
        return "next"
    elseif prevButtonSelected then
        return "prev"
    end

    return nil
end

-- information window for the capacitors


-- main display
local function renderPaginationButtons(monitorName, max)
    local width, height = term.getSize()
    local nextButton = " Next "
    local previousButton = " Prev "
    local spacer = "     "

    local dashboardButtonsToRender = previousButton..spacer..nextButton
    local buttonOffset = (width - (string.len(dashboardButtonsToRender))) / 2

    term.setCursorPos(buttonOffset, height)
    local x, y = getCursorPositionRelativeToParent(term.current())

    if dashboardButtons[monitorName] ==  nil then
        dashboardButtons[monitorName] = {
            prev = {
                startX = x,
                startY = y,
                endX = x,
                endY = y
            },

            next = {
                startX = x,
                startY = y,
                endX = x,
                endY = y
            },

            offset = 1,
            max = max
        }
    end

    if dashboardButtons[monitorName].offset == 1 then
        dashboardButtons[monitorName].max = max
    end

    term.setBackgroundColor(colors.red)
    term.write(previousButton)
    dashboardButtons[monitorName].prev.endX, dashboardButtons[monitorName].prev.endY = getCursorPositionRelativeToParent(term.current())

    term.setBackgroundColor(colors.black)
    term.write(spacer)

    dashboardButtons[monitorName].next.startX, dashboardButtons[monitorName].next.startY = getCursorPositionRelativeToParent(term.current())
    term.setBackgroundColor(colors.red)
    term.write(nextButton)
    dashboardButtons[monitorName].next.endX, dashboardButtons[monitorName].next.endY = getCursorPositionRelativeToParent(term.current())

    term.setBackgroundColor(colors.black)
end

local function writeSummary(monitorName, totalEnergyAvailable, totalCapacity, totalFlowRate)
    local width, height = term.getSize()
    local gridLabel = os.getComputerLabel() or "No name set"
    local gridLabelOffset = (width - (string.len(gridLabel))) / 2

    term.setCursorPos(gridLabelOffset, 1)
    term.write(gridLabel)
    term.setCursorPos(1, 3)

    print(padRight("Total Capacitors: "..tostring(#capacitors)))
    monitor.setTextScale(4)
    print(padRight("Max Energy Storage: "..totalCapacity.." RF"))
    monitor.setTextScale(4)

    local totalPercentRemaining = math.floor((totalEnergyAvailable / totalCapacity) * 100)
    emitRedstoneSignalOnLowPower(totalPercentRemaining)

    printZoneText(totalPercentRemaining, function() print(padRight("Energy Available: "..totalEnergyAvailable.." RF"))
    monitor.setTextScale(4) end)

    if totalFlowRate < 0 then
        term.setTextColor(colors.red)
    elseif totalFlowRate > 0 then
        term.setTextColor(colors.green)
    else
        term.setTextColor(colors.white)
    end

    print(padRight("Flow Rate: "..totalFlowRate.." RF/t"))
    term.setTextColor(colors.white)
    monitor.setTextScale(4)

    local currentX, currentY = term.getCursorPos()
    term.setCursorPos(1, currentY+1)

    clickableLines[monitorName] = {}
    local pagination = dashboardButtons[monitorName] or {}
    local offset = pagination.offset or 1

    local count = 0
    for i = offset, #capacitors do
        local v = capacitors[i]
        local name = string.format(" %03d", i)..": "
        local percent = v.percent

        printZoneText(percent, function() term.write(name) monitor.setTextScale(4) end)

        local labelLength = string.len(name)
        local powerBarLength = width - labelLength - 1
        local powerBarReading = math.floor((width - labelLength - 1) * (percent/100))

        local zoneColor = colors.red
        local textColor = colors.white
        if percent >= GREEN_ZONE then
            zoneColor = colors.green
        elseif percent >= YELLOW_ZONE and percent < GREEN_ZONE then
            zoneColor = colors.yellow
            textColor = colors.blue
        end

        local stats = padRight(string.format(" %d", percent).."%, "..v.flowRate.." RF/t", powerBarLength)

        term.setTextColor(textColor)
        term.setBackgroundColor(zoneColor)
        j = 1
        for c in stats:gmatch(".") do
            if(j>powerBarReading) then
                term.setBackgroundColor(colors.black)
            end

            term.write(c)

            j = j + 1
        end
        term.setTextColor(colors.white)
        term.setBackgroundColor(colors.black)

        local currentX, currentY = getCursorPositionRelativeToParent(term.current())
        addClickableLine(monitorName, v.name, currentY)

        local termX, termY = term.getCursorPos()
        term.setCursorPos(1, termY+2)
        count = count + 1

        if termY > (height - 4) then
            max = count
            break
        end
    end

    local currentX, currentY = term.getCursorPos()
    for k = currentY, height-1 do
        term.setCursorPos(1, k)
        term.clearLine()
    end

    renderPaginationButtons(monitorName, count)
end

local function displaySummary(totalEnergyAvailable, totalCapacity, totalFlowRate, targetMonitor)
    local listOfSummaryWindows = {
        native = nativeDisplayTabs.getDashboardWindows().getSummaryWindow()
    }

    for k, v in pairs(monitors) do
        listOfSummaryWindows[k] = v.windows.getSummaryWindow()
    end

    for k, v in pairs(listOfSummaryWindows) do
        if targetMonitor == nil or (k == targetMonitor) then
            local currentTerm = term.current()

            term.redirect(v)

            writeSummary(k, totalEnergyAvailable, totalCapacity, totalFlowRate)

            term.redirect(currentTerm)

            if k == targetMonitor then
                return
            end
        end
    end
end

local function monitorCapacitors()
    totalEnergyAvailable, totalCapacity, totalFlowRate = 0, 0, 0

    while true do
        -- show reading
        displaySummary(totalEnergyAvailable, totalCapacity, totalFlowRate)

        -- need to call this first to get most current sample
        getReading()

        local samplingTimer = os.startTimer(PAUSE_TIME_IN_SECONDS)
        while true do
            local event, p1 = os.pullEvent()
            if event == "timer" and p1 == samplingTimer then
                totalEnergyAvailable, totalCapacity, totalFlowRate = getReading()
                break
            elseif event == "pause_monitor" then
                os.pullEvent("resume_monitor")
                break
            end
        end
    end
end

local function changePages(monitor, x, y, isInformationWindowActive)
    local selectedButton = getSelectedDashboardButton(monitor, x, y)
    local showSummary = false

    if selectedButton == "next" and not isInformationWindowActive then
        local newOffset = dashboardButtons[monitor].offset + (dashboardButtons[monitor].max or 0)
        if newOffset <= #capacitors then
            dashboardButtons[monitor].offset = newOffset

            showSummary = true
        end
    elseif selectedButton == "prev" and not isInformationWindowActive then
        local newOffset = dashboardButtons[monitor].offset - (dashboardButtons[monitor].max or 0)
        if newOffset > 0 then
            dashboardButtons[monitor].offset = newOffset
        else
            dashboardButtons[monitor].offset = 1
        end

        showSummary = true
    end

    if showSummary then
        displaySummary(totalEnergyAvailable, totalCapacity, totalFlowRate, p1)
        return true
    end

    return false
end

local function nativeDashboardHandler()
    while true do
        local event, x, y = os.pullEvent("dashboard_clicked")
        local isInformationWindowActive = nativeDisplayTabs.getDashboardWindows().getInformationWindow().active

        if not changePages("native", x, y, isInformationWindowActive) then
            local selectedCapacitor = checkForSelectableLine("native", x, y)

            local summaryWindow = nativeDisplayTabs.getDashboardWindows().getSummaryWindow()
            local informationWindow = nativeDisplayTabs.getDashboardWindows().getInformationWindow()

            toggleInformationWindow(summaryWindow, informationWindow, selectedCapacitor)
        end
    end
end

local function monitorDashboardHandler()
    while true do
        local event, monitor, x, y = os.pullEvent("monitor_touch")

        if monitors[monitor].active == true then
            local summaryWindow = monitors[monitor].windows.getSummaryWindow()
            local informationWindow = monitors[monitor].windows.getInformationWindow()

            if not changePages(monitor, x, y, informationWindow.active) then
                local selectedCapacitor = checkForSelectableLine(monitor, x, y)
                toggleInformationWindow(summaryWindow, informationWindow, selectedCapacitor)
            end
        end
    end
end
-- main display


-- monitor selection screen (if monitor is attached)
local function addClickableOutputMonitor(k, currentY)
    clickableOutputMonitors[k] = {
        line = currentY
    }
end

local function toggleMonitor(monitorName)
    monitors[monitorName].active = not monitors[monitorName].active

    if monitors[monitorName].active then
        console.log("Enabling "..monitorName)
        MONITORS_ACTIVE[monitorName] = true
    else
        console.log("Disabling "..monitorName)
        MONITORS_ACTIVE[monitorName] = nil

        hideWindows(unpack(monitors[monitorName].windows))
        monitors[monitorName].peripheral.setBackgroundColor(colors.black)
        monitors[monitorName].peripheral.clear()
    end

    saveSettings()
end

local function showMonitorSelection(targetWindow)
    local currentTerm = term.current()

    term.redirect(targetWindow)
    term.setCursorPos(1, 1)
    term.clear()

    local width, height = term.getSize()

    if tableSize(monitors) > 0 then
        printToWindow(term, 0, "Select Output Monitor: ")
    else
        printToWindow(term, 0, "No Monitors found.")
    end

    printToWindow(term, 0, "")

    local currentX, currentY = term.getCursorPos()
    term.setCursorPos(currentX + 2, currentY)

    clickableOutputMonitors = {}
    for k, v in pairs(monitors) do
        currentX, currentY = getCursorPositionRelativeToParent(targetWindow)
        term.setBackgroundColor(colors.black)

        if v.active == true then
            term.setBackgroundColor(colors.blue)
            showWindows(unpack(v.windows))
        end

        label = padRight("  "..k, width-4)
        printToWindow(term, 0, label)

        addClickableOutputMonitor(k, currentY)
    end
    term.setBackgroundColor(colors.black)

    term.redirect(currentTerm)

    while true do
        local event, x, y = os.pullEvent()

        if "monitors_clicked" == event then
            for k, v in pairs(clickableOutputMonitors) do
                if v.line == y then
                    toggleMonitor(k)
                    return
                end
            end
        elseif event == "peripheral" or event == "peripheral_detach" then
            coroutine.yield()
            return
        end
    end
end

local function monitorSelection()
    for k, v in pairs(MONITORS_ACTIVE) do
        if monitors[k] then
            monitors[k].active = true
        end
    end

    while true do
        showMonitorSelection(monitorSelectionWindow)
    end
end

local function nativeDisplay()
    while true do
        local currentTerm = term.current()

        term.redirect(nativeMonitorTabWindow)
        nativeMonitorTabWindow.setVisible(true)

        term.setCursorPos(1, 1)
        term.setBackgroundColor(colors.gray)
        term.clearLine()
        term.setTextColor(colors.yellow)

        for i, v in ipairs(nativeDisplayTabs) do
            hideWindows(unpack(v.windows))
        end

        for i, v in ipairs(nativeDisplayTabs) do
            local tab = v.tab
            tab.startX, tab.startY = getCursorPositionRelativeToParent(term.current())

            if tab.active then
                term.setBackgroundColor(colors.black)
                showWindows(unpack(v.windows))
            else
                term.setBackgroundColor(colors.gray)
            end

            term.write(" "..tab.label.." ")
            tab.endX, tab.endY = getCursorPositionRelativeToParent(term.current())
        end
        term.setTextColor(colors.white)
        term.redirect(currentTerm)

        while true do
            local event, selectedTab = os.pullEvent("selected_tab")

            if selectedTab then
                nativeDisplayTabs.setSelectedTab(selectedTab)
                break
            end
        end
    end
end

local function mouseClickEventMonitor()
    while true do
        local event, type, x, y = os.pullEvent("mouse_click")
        local selectedTab = nativeDisplayTabs.getSelectedTab(x, y)

        if selectedTab and nativeDisplayTabs.getDashboardWindows().getInformationWindow().active == false then
            os.queueEvent("selected_tab", selectedTab)
        elseif selectedTab == nil then
            local activeTab = nativeDisplayTabs[nativeDisplayTabs.getActiveTab()]

            os.queueEvent(activeTab.tab.event, x, y)
        end
    end
end

-- Initialization
initializeNativeDisplayTabs()
resetRedstoneState()
addCapacitors()
addMonitors()

while true do
    parallel.waitForAll(mouseClickEventMonitor, nativeDisplay, monitorSelection, hotplugPeripherals, monitorCapacitors, nativeDashboardHandler, monitorDashboardHandler)
end