Quiz Npc

local focuses = {}
local quiz = {}

local function isFocused(cid)
    for i, v in pairs(focuses) do
        if(v == cid) then
            return true
        end
    end
    return false
end

local function addFocus(cid)
    if(not isFocused(cid)) then
        table.insert(focuses, cid)
    end
end

local function removeFocus(cid)
    for i, v in pairs(focuses) do
        if(v == cid) then
            table.remove(focuses, i)
            break
        end
    end
end

local function lookAtFocus()
    for i, v in pairs(focuses) do
        if(isPlayer(v) == TRUE) then
            doNpcSetCreatureFocus(v)
            return
        end
    end
    doNpcSetCreatureFocus(0)
end

function onCreatureAppear(cid)
end

function onCreatureDisappear(cid)
    if(isFocused(cid)) then
        selfSay("Hmph!")
        removeFocus(cid)
    end
end

function onCreatureSay(cid, type, msg)
    a = {
        ["quiz 1"] = {id = 8110, cost = 5, uid = 8910, name = "quiz bag 1", r = "Muito Comum"},
        ["quiz 2"] = {id = 8110, cost = 10, uid = 8911, name = "quiz bag 2", r = "Comum"},
        ["quiz 3"] = {id = 8110, cost = 15, uid = 8912, name = "quiz bag 3", r = "Raro"},
        ["quiz 4"] = {id = 8110, cost = 20, uid = 8913, name = "quiz bag 4", r = "Muito Raro"},
        }

    b = a[msg]

    if msg == "hi" and not isFocused(cid) then
        selfSay("Bem vindo, ".. getCreatureName(cid) ..".", cid, TRUE)
        selfSay("Olá, deseja ver o que eu vendo? Fale {offer}.", cid)
        addFocus(cid)
    elseif isFocused(cid) and msg == "offer" or msg == "trade" then
        selfSay("Eu vendo {quiz 1} bag por 5 Quiz Points, {quiz 2} bag por 10 Quiz Points, {quiz 3} bag por 15 Quiz Points e {quiz 4} bag por 20 Quiz Points.", cid)
    elseif b then
        selfSay("Você deseja comprar 1 quiz bag de raridade "..b.r.." por "..b.cost.." acertos?", cid)
        quiz[cid] = b
    elseif msg == "yes" and quiz[cid] then
        if getPlayerStorageValue(cid, 8914) < quiz[cid].cost then
            return selfSay("Você não possui pontos suficientes.", cid)
        end
        setPlayerStorageValue(cid, 8914, getPlayerStorageValue(cid, 8914)-quiz[cid].cost)
        bag2 = doPlayerAddItem(cid, 8110, 1)
        doItemSetAttribute(bag2, "uid", quiz[cid].uid)
        doItemSetAttribute(bag2, "name", quiz[cid].name)
        selfSay("Você comprou 1 quiz bag de raridade "..quiz[cid].r.." por "..quiz[cid].cost.." acertos.", cid)
        quiz[cid] = nil
    elseif isFocused(cid) and (msg == "bye" or msg == "goodbye" or msg == "cya") then
        selfSay("Goodbye!", cid, TRUE)
        removeFocus(cid)
    end
end

function onPlayerCloseChannel(cid)
    if isFocused(cid) then
        selfSay("Hmph!")
        removeFocus(cid)
    end
end

function onThink()
    for i, focus in pairs(focuses) do
        if(isCreature(focus) == FALSE) then
            removeFocus(focus)
        else
            local distance = getDistanceTo(focus) or -1
            if((distance > 4) or (distance == -1)) then
                selfSay("Hmph!")
                removeFocus(focus)
            end
        end
    end
    lookAtFocus()
end