EXEC_SHELL_PATH=$(command -v bash)

lua=$(which lua)
pid=$$
"$lua" <<EOF
-- Set the directory containing the wallpapers
local wallpaper_dir = "~/wallpapers"

-- Get a list of all files in the directory
local files = {}
for file in io.popen("find " .. wallpaper_dir .. " -type f -print0 | xargs -0 -I {} echo {}"):lines() do
    table.insert(files, file)
end

print("Files:")
for i, file in ipairs(files) do
    print(file)
end

-- Create a pid file to store the process ID
local pid_file = "/tmp/wallpapers.pid"
local pid = io.open(pid_file, "w")
pid:write(tostring($pid))
pid:close()

-- Set the process name
local cmdline_file = "/proc/$pid/comm"
local cmdline = io.open(cmdline_file, "w")
cmdline:write("wallpapers")
cmdline:close()

while true do
    -- Read true random data from /dev/random
    local random_file = io.open("/dev/random", "rb")
    local random_bytes = random_file:read(4)
    random_file:close()

    -- Convert the random bytes to a Lua number
    local random_number = 0
    for i = 1, #random_bytes do
        random_number = random_number * 256 + string.byte(random_bytes, i)
    end

    -- Use the random number to select a wallpaper
    local wallpaper_index = random_number % #files + 1
    local random_wallpaper = files[wallpaper_index]

    print("Random wallpaper:", random_wallpaper)

    -- Set the wallpaper with feh, escaping the filename properly
    local command = "feh --bg-fill '" .. random_wallpaper:gsub("'", "'\\''") .. "'"
    os.execute(command)

    -- Wait 30 seconds before changing the wallpaper again
    os.execute("sleep 30")
end
EOF