local function DenyCommand(errorCode, client)
    local text = {}
    text["DEAD"] = "You need to be alive to use this command."
    text["HEADSET"] = "You need a working headset to use this command."
    text["CAPTAINID"] = "You need the captain's ID to use this command."
    text["NOSPEAK"] = "You need to be able to speak to use this command."
    text["SPAM"] = "You need to wait a little bit to use this command again."

    Game.SendDirectChatMessage("", text[errorCode], nil, ChatMessageType.ServerMessageBox, client)
    return true
end

local spamLimit = 0
Hook.Add("chatMessage", "captainAnnounce", function (message, client)
    local split = {}
    for w in string.gmatch(message, "[^%s]+") do
        table.insert(split, w)
    end
    local command = table.remove(split, 1)

    if command ~= "!announce" then return end

    if Timer.GetTime() < spamLimit then return DenyCommand("SPAM", client) end

    if client.Character == nil or client.Character.IsDead or not client.Character.IsHuman then
        return DenyCommand("DEAD", client)
    end

    if client.Character.SpeechImpediment > 99 then return DenyCommand("NOSPEAK", client) end

    local headsetSlot = client.Character.Inventory.GetItemInLimbSlot(InvSlotType.Headset)

    if headsetSlot == nil then return DenyCommand("HEADSET", client) end
    local wifiComponent = headsetSlot.GetComponentString("WifiComponent")

    if wifiComponent == nil or not wifiComponent.CanTransmit() then
        return DenyCommand("HEADSET", client)
    end

    local cardSlot = client.Character.Inventory.GetItemInLimbSlot(InvSlotType.Card)
    if cardSlot == nil then return DenyCommand("CAPTAINID", client) end

    local idCard = cardSlot.GetComponentString("IdCard")
    if idCard == nil then return DenyCommand("CAPTAINID", client) end
    if idCard.GetJob() == nil then return DenyCommand("CAPTAINID", client) end
    if idCard.GetJob().Identifier ~= "captain" then return DenyCommand("CAPTAINID", client) end

    local captainMessage = table.concat(split, ' ')
    if captainMessage == nil then return end
    Game.SendMessage("Captain Announces: " .. captainMessage, ChatMessageType.ServerMessageBox)
    Game.SendMessage("Captain Announces: " .. captainMessage, ChatMessageType.Error)

    Game.Log(client.Name .. " sent an captain announcement: " .. captainMessage, ServerLogMessageType.Chat)

    spamLimit = Timer.GetTime() + 30

    return true
end)