local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)

function onCreatureAppear(cid)          npcHandler:onCreatureAppear(cid)            end
function onCreatureDisappear(cid)       npcHandler:onCreatureDisappear(cid)         end
function onCreatureSay(cid, type, msg)      npcHandler:onCreatureSay(cid, type, msg)        end
function onThink()              npcHandler:onThink()                    end

function creatureSayCallback(cid, type, msg)
    if not npcHandler:isFocused(cid) then
        return false
    end
    local moeda = 9020
    local msg = string.lower(msg)
    local t = {
        ["boots of haste"] = {15, 2195},
        ["demon helmet"] = {25, 2493},
        ["frozen starlight"] = {30, 2361},
        ["royal crossbow"] = {20, 8851},
        ["solar axe"] = {30, 8925},
        ["soft boots"] = {50, 2640},
        ["demon armor"] = {100, 2494},
        ["firewalker boots"] = {50, 9932},
        ["magic plate armor"] = {70, 2472},
        ["flame blade"] = {100, 8931}
    }
    local player = Player(cid)
        if msgcontains(msg, 'trade') then
            local str = ""
            str = str .. "Eu vendo estes items: "
            for name, pos in pairs(t) do
                str = str.." {"..name.."} = "..pos[1].." Moedas /"
            end
            str = str .. "."
            npcHandler:say(str, cid)
        elseif t[msg] then
        if player:removeItem(moeda, t[msg][1]) then
            player:addItem(t[msg][2], 1)
            npcHandler:say("Aqui está seu ".. ItemType(t[msg][2]):getName() .."!", cid)
        else
            npcHandler:say("Você não tem "..t[msg][1].." ".. ItemType(moeda):getName(), cid)
        end
    end
    return true
end

npcHandler:setCallback(CALLBACK_MESSAGE_DEFAULT, creatureSayCallback)
npcHandler:addModule(FocusModule:new())