-- Function to handle redstone signal at the start
local function checkRedstoneSignal()
    if redstone.getInput("right") then
        shell.run(".emgrec/bootloader")
        return true -- Indicates that the emergency bootloader was executed
    end
    return false -- Indicates no signal was detected
end

-- List of required files
local requiredFiles = {
    "/disk/bootloader/VA11-ILLA.lua",
    "/disk/os/home.lua",
    "/disk/os/lock.lua",
    "/disk/boot/boot-animation",
    "/disk/error/BSOD.lua",
    -- Add more file names as needed
}

-- Function to check if all required files exist
os.pullEvent = os.pullEventRaw

local function checkFiles()
    local missingFiles = {}

    for _, fileName in ipairs(requiredFiles) do
        if not fs.exists(fileName) then
            table.insert(missingFiles, fileName)
        end
    end

    return missingFiles
end

-- Main function to execute no-os.lua if files are missing
local function main()
    local missing = checkFiles()

    if #missing > 0 then
        -- Execute no-os.lua if any files are missing
        shell.run("no-os")
    else
        -- All files exist, continue with your code here
        shell.run("/disk/boot/start-check.lua")
        -- Add your code to run if all files exist
    end
end

-- Check for redstone signal at the very start
if checkRedstoneSignal() then
    return -- Exit immediately if the emergency bootloader was executed
end

-- Run the main function if no redstone signal was detected
main()