副本翻牌：通关后三选一翻牌奖励

local function takeCardBad(actor, idx)
    local id = 1500 + math.random(1, 3)   -- 点击时才随机
    giveitem(actor, id, 1)                -- 连点两次发两份不同物
end

local function onBossDown(actor)
    setplayvar(actor, "card1", 1501)
    setplayvar(actor, "card2", 1502)
    setplayvar(actor, "card3", 1503)
    setplayvar(actor, "cardTake", 0)
    sendmsg(actor, 1, "翻牌开启，三选一，30 秒内有效")
end
local function takeCard(actor, idx)
    if getplayvar(actor, "cardTake") == 1 then
        sendmsg(actor, 1, "已翻过，不能再翻")
        return
    end
    giveitem(actor, getplayvar(actor, "card" .. idx), 1)
    setplayvar(actor, "cardTake", 1)
end