if not warzoneConfig then
    warzoneConfig = {
        -- Warzone 1
        [1050] = {
            center = Position(33116, 31957, 11),
            rangeX = 18, rangeY = 14,

            boss = "Gnomevil",
            teleportTo = Position(x, y, z),
            locked = false,

            storage = 15151,
            interval = 10 * 60 * 60,

            exit = Position(x, y, z)
        }
    }

    warzoneConfig.findByName = function(name, last)
        local i, v = next(warzoneConfig, last)
        if type(v) == 'table' and v.boss == name then
            return v
        elseif not i then
            return nil
        end
        return warzoneConfig.findByName(name, i)
    end
end

local function filter(list, f, i)
    if i < #list then
        if f(list[i]) then
            return list[i], filter(list, f, i + 1)
        else
            return filter(list, f, i + 1)
        end
    elseif f(list[i]) then
        return list[i]
    end
end

function onStepIn(creature, item, pos, fromPosition)
    if not creature:isPlayer() then
        creature:teleportTo(fromPosition)
        return false
    end

    local info = warzoneConfig[item:getActionId()]
    if not info then
        return false
    end

    if  creature:getStorageValue(info.storage) > os.time() then
        creature:sendTextMessage(MESSAGE_INFO_DESCR, "You have already cleared this warzone in the last ten hours.")
        creature:teleportTo(fromPosition)
        return false
    end

    if info.locked then
        creature:sendTextMessage(MESSAGE_INFO_DESCR, "Please, wait a minute until the room is cleared.")
        creature:teleportTo(fromPosition)
        return false
    end

    creature:teleportTo(info.teleportTo)
    local spectators = Game.getSpectators(info.center, false, false, 0, info.rangeX, 0, info.rangeY)
    if not filter(spectators, function(c) return c:isMonster() end, 1) then
        local boss = Game.createMonster(info.boss, info.center)
        boss:registerEvent('WarzoneBossDeath')
    end

    return true
end