-- Doggy OS System Update Script with Enhanced UI

-- Function to draw a custom confirmation screen
local function drawConfirmationScreen(title, message, yesCallback, noCallback)
    term.clear()
    term.setCursorPos(1, 1)
    term.setTextColor(colors.yellow)
    print(title)
    term.setTextColor(colors.white)

    -- Draw the confirmation message
    print("\n" .. message)
    print("\n[YES] - Confirm  [NO] - Cancel")

    -- Wait for user input
    local response = read()
    if response:lower() == "yes" then
        yesCallback()
    else
        noCallback()
    end
end

-- Function to draw the loading screen with progress bar
local function drawLoadingScreen(progress, total, title, label)
    local barLength = 30
    local filledLength = math.floor((progress / total) * barLength)
    local emptyLength = barLength - filledLength
    local bar = "[" .. string.rep("=", filledLength) .. string.rep(" ", emptyLength) .. "]"

    -- Clear the screen and display the loading screen
    term.clear()
    term.setCursorPos(1, 1)
    term.setTextColor(colors.yellow)
    print(title)
    term.setTextColor(colors.white)
    print(label)
    term.setCursorPos(1, 3)
    print("Progress:")
    term.setCursorPos(1, 4)
    term.clearLine()
    term.write(bar)
    term.setCursorPos(1, 5)
    term.clearLine()
    term.write(label .. " (" .. progress .. "/" .. total .. ")")
end

-- Function to download a file from Pastebin
local function downloadFromPastebin(pastebinURL, savePath)
    local response = http.get(pastebinURL)
    if response then
        local data = response.readAll()
        local file = fs.open(savePath, "w")
        file.write(data)
        file.close()
        return true
    else
        return false
    end
end

-- Function to update the system
local function updateSystem()
    local totalSteps = 4
    local currentStep = 0
    local title = "DOGGY OS SYSTEM UPDATE"

    -- Show confirmation screen
    drawConfirmationScreen("System Update Confirmation",
        "This will delete the following files and update the system:\n/startup\n/reboot\nDo you wish to proceed?",
        function()  -- If user clicks YES
            -- Start the update process
            drawLoadingScreen(currentStep, totalSteps, title, "Initializing Update...")
            sleep(1)

            local filesToDelete = {"/startup", "/reboot"}

            -- Delete files during the update process and show progress
            for _, file in ipairs(filesToDelete) do
                if fs.exists(file) then
                    fs.delete(file)
                end
                currentStep = currentStep + 1
                drawLoadingScreen(currentStep, totalSteps, title, "Deleting Files...")
                sleep(1)
            end

            -- Download the new startup and reboot files from Pastebin
            local pastebinURL = "https://pastebin.com/raw/9ahPi497"
            if downloadFromPastebin(pastebinURL, "/startup") then
                currentStep = currentStep + 1
                drawLoadingScreen(currentStep, totalSteps, title, "Downloading Startup File...")
                sleep(1)
            else
                print("Failed to download the new startup file.")
                return
            end

            if downloadFromPastebin(pastebinURL, "/reboot") then
                currentStep = currentStep + 1
                drawLoadingScreen(currentStep, totalSteps, title, "Downloading Reboot File...")
                sleep(1)
            else
                print("Failed to download the new reboot file.")
                return
            end

            -- Final step: Reboot the system
            drawLoadingScreen(totalSteps, totalSteps, title, "Update Complete! Rebooting...")
            sleep(2)
            os.reboot()
        end,
        function()  -- If user clicks NO
            print("Update canceled.")
        end)
end

-- Function to perform a factory reset
local function factoryReset()
    drawConfirmationScreen("Factory Reset Warning",
        "This will delete all data and reset the system to factory settings.\nDo you wish to proceed?",
        function()  -- If user clicks YES
            -- Perform the reset by deleting all files
            for _, file in ipairs(fs.list("/")) do
                if file ~= "startup" and file ~= "reboot" then
                    fs.delete("/" .. file)
                end
            end

            -- After reset, run the system update
            print("Factory reset complete. Running system update...")
            updateSystem()
        end,
        function()  -- If user clicks NO
            print("Factory reset canceled.")
        end)
end

-- Function to uninstall the system
local function uninstallSystem()
    drawConfirmationScreen("System Uninstall Warning",
        "This will delete all data and uninstall the system completely.\nDo you wish to proceed?",
        function()  -- If user clicks YES
            -- Perform the uninstall by deleting all files
            for _, file in ipairs(fs.list("/")) do
                fs.delete("/" .. file)
            end

            -- Reboot after uninstallation
            print("System uninstalled. Rebooting...")
            os.reboot()
        end,
        function()  -- If user clicks NO
            print("Uninstall canceled.")
        end)
end

-- Function to display the main menu with options
local function displayMainMenu()
    term.clear()
    term.setCursorPos(1, 1)
    term.setTextColor(colors.yellow)
    print("DOGGY OS RECOVERY AND FIRMWARE / SOFTWARE MANAGER")
    term.setTextColor(colors.white)

    -- Display options for Factory Reset and System Uninstall
    print("\n1. System Update")
    print("2. Factory Reset")
    print("3. Uninstall System")
    print("\nChoose an option:")

    local option = tonumber(read())

    if option == 1 then
        updateSystem()
    elseif option == 2 then
        factoryReset()
    elseif option == 3 then
        uninstallSystem()
    else
        print("Invalid option. Please choose again.")
        displayMainMenu()
    end
end

-- Run the main menu
displayMainMenu()