【进阶实战】占卜屋：每日运势的伪随机与保底封装

local function divineRoll(actor)
    local key = "Divined_" .. math.floor(os.time() / 86400)
    if (tonumber(getplayvar(actor, 1, key)) or 0) == 1 then
        sendmsg(actor, 1, "今日已占卜，明日请早。")
        return -1
    end
    setplayvar(actor, 1, key, 1, 1)
    local streak = tonumber(getplayvar(actor, 1, "LuckStreak")) or 0
    local roll
    if streak >= 3 then
        roll = 100
        setplayvar(actor, 1, "LuckStreak", 0, 1)
    else
        roll = math.random(1, 100)
        if roll <= 20 then
            setplayvar(actor, 1, "LuckStreak", streak + 1, 1)
        else
            setplayvar(actor, 1, "LuckStreak", 0, 1)
        end
    end
    return roll
end

local function divine(actor)
    local roll = divineRoll(actor)
    if roll < 0 then
        return
    end
    local grade = roll > 90 and "大吉" or (roll > 60 and "中吉"
        or (roll > 20 and "小吉" or "今日宜稳"))
    local buff = roll > 90 and 5 or (roll > 60 and 3 or (roll > 20 and 1 or 0))
    setplayvar(actor, 0, "LuckBuff", buff, 0)
    sendmsg(actor, 1, "今日运势：" .. grade .. "，攻击加成 " .. buff .. "%。")
end