-- Lua callins (one new, one old, UNSYNCED LUA ONLY)
    -- (RecvSkirmishAIMessage was formerly known as AICallIn)
    gadget:RecvSkirmishAIMessage(number aiTeam, string aiMessage) --> string
    widget:RecvSkirmishAIMessage(number aiTeam, string aiMessage) --> string

    -- Lua callouts (new, UNSYNCED LUA ONLY)
    Spring.SendSkirmishAIMessage(number aiTeam, string aiMessage) -->
        boolean, {[1] = string, [2] = string, ...}

    // legacy C++ callins (new)
    void IGlobalAI::RecvLuaMessage(const char* inData, const char** outData);

    // legacy C++ callouts (one new, one old)
    const char* IAICallback::CallLuaRules(const char* inData, int inSize, int* outSize);
    const char* IAICallback::CallLuaUI(const char* inData, int inSize, int* outSize);

-- some LuaUI widget
function widget:RecvSkirmishAIMessage(aiTeam, aiMessage)
    func = loadstring(aiMessage)
    if (func ~= nil) then
        func()
    end
    return ""
end

-- some LuaRules gadget
if (gadgetHandler:IsSyncedCode()) then
    function gadget:Explosion(weaponDefID, px, py, pz, ownerID)
        SendToUnsynced("Explosion", px, py, pz)
    end
else
    local function HandleExplosion(...)
        local x = arg[3]
        local y = arg[4]
        local z = arg[5]
        local aiTeam = 1
        local aiMessage = "t = {" ..
            "msgID=\"Explosion\"" .. ", " ..
            "x=" .. x .. ", " ..
            "y=" .. y .. ", " ..
            "z=" .. z .. ", " ..
        "}"
        Spring.SendSkirmishAIMessage(aiTeam, aiMessage)
    end

    local eventMap = {Explosion = HandleExplosion}

    function gadget:RecvFromSynced(...)
        local eventName = arg[2]

        if (eventMap[eventName] ~= nil) then
            eventMap[eventName](...)
        end
    end
end



// AI code
void AI::UnitDestroyed(int unitID, int attackerID) {
    static char buffer[1024];

    const float3& unitPos = callback->GetUnitPosition(unitID);
    const char* luaString = "Spring.MarkerAddPoint(%f, %f, %f, \"AI: unit %d was here\")";

    snprintf(buffer, 1024, luaString, pos.x, pos.y, pos.z, unitID);
    callback->CallLuaUI(buffer, -1, NULL);
}

void AI::RecvLuaMessage(const char* inData, const char** outData) {
   const LuaTable& table = LuaParser::Parse(inData);
   if (table.GetValue<std::string>("msgID") == "Explosion") {
       const float x = table.GetValue<float>("x");
       const float y = table.GetValue<float>("y");
       const float z = table.GetValue<float>("z");
       intelHandler->Explosion(x, y, z);
   }
}