local fs = require("filesystem")
local internet = require("internet")
local computer = require("computer")

local file = {
    name = "reactor.lua",
    url = "https://raw.githubusercontent.com/NusanHuh/uc_big_reactor/refs/heads/main/reactor.lua"
}

local home = "/home"
fs.makeDirectory(home)

local function downloadFile(file)
    local path = home .. "/" .. file.name
    local handle, reason = internet.request(file.url)
    if not handle then
        io.stderr:write("Failed to download " .. file.name .. ": " .. tostring(reason) .. "\n")
        return false
    end

    local f = io.open(path, "w")
    for chunk in handle do f:write(chunk) end
    f:close()
    return true
end

local function isDownloaded()
    return fs.exists(home .. "/" .. file.name)
end

print("Downloading file to /home ...")
print("→ " .. file.name)
if downloadFile(file) then
    print("  Download complete")
else
    print("  Download failed")
end

if isDownloaded() then
    local autorun = "/autorun.lua"
    local f = io.open(autorun, "w")
    f:write('os.execute("/home/reactor.lua")\n')
    f:close()
    print("\nFile downloaded successfully!")
    print("'autorun.lua' created. The computer will auto-run reactor.lua at startup!")
    print("Rebooting now...")

    os.sleep(2)
    computer.shutdown(true)
else
    print("\nDownload failed. autorun.lua was not created.")
end