local COMMAND_PREFIX <const> = {"!", "/"}
COMMANDS = {
    {
        name = "difficulty",
        takes_argument = true,
        func = DifficultyCmd -- name of the function only
    }
}

-- yes i copied this from stackoverflow, how can you tell?
function string.simplesplit(inputstr, sep)
    if sep == nil then
        sep = "%s"
    end

    local t = {}
    for str in string.gmatch(inputstr, "([^" .. sep .. "]+)") do
        table.insert(t, str)
    end

    return t
end

local function ProcCommand(player, cmd)
    local cmdprefix = (type(COMMAND_PREFIX) == "table") and COMMAND_PREFIX or {COMMAND_PREFIX}
    cmd = string.lower(cmd)

    for _, p in ipairs(cmdprefix) do
        for _, c in ipairs(COMMANDS) do
            if string.match(cmd, "^" .. p .. c.name) then
                if c.takes_argument then
                    argument = string.simplesplit(cmd)[1] or nil

                    c.func(player, argument)
                    return
                else
                    c.func(player)
                    return
                end
            end
        end
    end
end

local function DifficultyCmd(player, addarg)
    if addarg then
        if addarg == "serene" or addarg == "easy" then
            player:DisplayTextChat("DETAILS ABOUT THE DIFFICULTY: \x071FDB32Serene\x07FFFFFF (Easy)")
            player:DisplayTextChat("- Zombies have reduced health and move speed.")
            player:DisplayTextChat("- The double damage for zombies at Wave 17+ is disabled.")
        elseif addarg == "staple" or addarg == "normal" then
            player:DisplayTextChat("DETAILS ABOUT THE DIFFICULTY: \x071FDB32Staple\x07FFFFFF (Normal)")
            player:DisplayTextChat("- Zombies have normal health and move speed.")
            player:DisplayTextChat("- Zombie damage is doubled from Wave 17 onwards.")
            player:DisplayTextChat("- Selected by default if no votes were made after 15 seconds.")
        elseif addarg == "struggle" or addarg == "hard" then
            player:DisplayTextChat("DETAILS ABOUT THE DIFFICULTY: \x079209B8Struggle\x07FFFFFF (Hard)")
            player:DisplayTextChat("- Zombies have increased health and move speed.")
            player:DisplayTextChat("- Zombie damage is increased to +50% at Waves 8 - 12, then +100% at Waves 13 - 16, and +167% from Wave 17 onwards.")
            player:DisplayTextChat("- Bonus weight for scam and weakening penalties is increased to 5.")
            player:DisplayTextChat("- SOLO MODE ONLY: Permanent Mini-Crits on the solo player.")
        elseif addarg == "sanguine" or addarg == "expert" then
            player:DisplayTextChat("DETAILS ABOUT THE DIFFICULTY: \x07941406Sanguine\x07FFFFFF (Expert)")
            player:DisplayTextChat("- Zombies have even higher health and much faster move speed.")
            player:DisplayTextChat("- Zombie damage is increased every wave. Milestones include: +50% at Wave 8, +100% at Wave 13, +167% at Wave 17, and +200% at Wave 20.")
            player:DisplayTextChat("- Bonus weight for scam and weakening penalties is increased to 10.")
            player:DisplayTextChat("- Mannpowers are binding, cannot be removed, and disappear on death/drop. Snatchers copy Mannpowers instead of stealing them.")
            player:DisplayTextChat("- SOLO MODE ONLY: Permanent Mini-Crits on the solo player.")
        end
    else
        player:DisplayTextChat("Available Difficulties: Serene (Easy), Staple (Normal), Struggle (Hard), Sanguine (Expert)")
        player:DisplayTextChat("Type !difficulty <name> in chat to read about each difficulty in detail.")
    end
end

function OnPlayerChat(player, chat)
    print("YES THIS WORKS")
    ProcCommand(player, chat)
end