System Bootloader startup

-- Doggy OS UEFI

-- Function to draw a border
local function drawBorder()
    term.clear()
    local w, h = term.getSize()
    for y = 1, h do
        term.setCursorPos(1, y)
        term.write("|")
        term.setCursorPos(w, y)
        term.write("|")
    end
    for x = 1, w do
        term.setCursorPos(x, 1)
        term.write("-")
        term.setCursorPos(x, h)
        term.write("-")
    end
    term.setCursorPos(1, 1)
    term.write("+")
    term.setCursorPos(w, 1)
    term.write("+")
    term.setCursorPos(1, h)
    term.write("+")
    term.setCursorPos(w, h)
    term.write("+")
end

-- Function to center text on the screen
local function centerText(text, y)
    local w, _ = term.getSize()
    local x = math.floor((w - #text) / 2) + 1
    term.setCursorPos(x, y)
    term.write(text)
end

-- Function to show the UEFI message
local function showUEFIMessage()
    drawBorder()
    local _, h = term.getSize()
    centerText("Doggy OS UEFI", math.floor(h / 2))
end

-- Function to display an error screen
local function showErrorScreen(message)
    term.setBackgroundColor(colors.red)
    term.setTextColor(colors.white)
    term.clear()
    drawBorder()
    local _, h = term.getSize()
    centerText("Doggy OS Internal Bootloader Error:", math.floor(h / 2) - 2)
    centerText(message, math.floor(h / 2))
    centerText("Press any key to restart...", math.floor(h / 2) + 2)
    os.pullEvent("key") -- Wait for a key press
    os.reboot() -- Reboot the system
end

-- Function to load the boot animation
local function loadBootAnimation()
    if fs.exists("/disk/boot/boot-animation") then
        shell.run("/disk/.BL")
    else
        print("Boot animation not found!")
    end
end

-- Function to load the boot options
local function loadBootOptions()
    if fs.exists("/disk/boot/boot-options") then
        shell.run("/disk/boot/boot-options")
    else
        print("Boot options not found!")
    end
end

-- Function to check the password
local function checkPassword()
    if fs.exists("/FW-Security/BIOS/Boot/poweron.pass") then
        local file = fs.open("/FW-Security/BIOS/Boot/poweron.pass", "r")
        local correctPassword = file.readAll()
        file.close()

        while true do
            drawBorder()
            local _, h = term.getSize()
            centerText("Doggy OS Boot Authentication", math.floor(h / 2) - 2)
            centerText("Enter Password:", math.floor(h / 2))
            term.setCursorPos(math.floor(term.getSize() / 2), math.floor(h / 2) + 1)
            local password = read("*") -- Read the password, hiding input

            if password == correctPassword then
                return true
            else
                local timeoutFile = "/FW-Security/BIOS/Boot/TIMEOUT"
                local f = fs.open(timeoutFile, "w")
                f.close()
                return false
            end
        end
    end
    return true
end

-- Function to handle timeout
local function handleTimeout()
    local timeoutFile = "/FW-Security/BIOS/Boot/TIMEOUT"
    if fs.exists(timeoutFile) then
        local timeout = 30
        while timeout > 0 do
            drawBorder()
            local _, h = term.getSize()
            centerText("Incorrect password.", math.floor(h / 2) - 1)
            centerText("System locked for " .. timeout .. " seconds.", math.floor(h / 2))
            sleep(1)
            timeout = timeout - 1
        end
        fs.delete(timeoutFile)
        os.reboot()
    end
end

-- Main function to handle UEFI message, shutdown screen, and timeout
local function main()
    -- Check if multishell is supported
    if not multishell then
        showErrorScreen("Multishell is not supported on this system.")
        return
    end

    handleTimeout()

    if not checkPassword() then
        handleTimeout()
        return
    end

    -- Show UEFI message and wait for 2 seconds
    showUEFIMessage()
    local timer = os.startTimer(2) -- Set a timer for 2 seconds

    -- Run the boot animation after the UEFI screen
    while true do
        local event, param = os.pullEvent()
        if event == "timer" and param == timer then
            -- After 2 seconds, run the boot animation
            loadBootAnimation()  -- Run the animation
            shell.run("/disk/boot-options")  -- Load boot options
            return
        end
    end
end

-- Start the main function
main()