【引擎触发】屠魔战场：每日限时的积分竞技场活动

---全局定时器 22 号：每 10 秒驱动状态机
setontimerex(22, 10)
local STAGE = { idle = 0, fighting = 1, settle = 2 }

function Slaughter.tick()
    local now = os.time()
    if Slaughter.stage == STAGE.idle and Slaughter.isOpenTime(now) then
        Slaughter.stage = STAGE.fighting
        Slaughter.endAt = now + 1800
        QF_Broadcast("屠魔战场开启，限时 30 分钟！")
        Slaughter.spawnWave()
    elseif Slaughter.stage == STAGE.fighting and now > Slaughter.endAt then
        Slaughter.stage = STAGE.settle
        Slaughter.settle()
    end
end

---killmon: 击杀怪物触发
function killmon(actor, monName)
    if Slaughter.stage ~= STAGE.fighting then return end
    local rec = Slaughter.board[actor:GetUserId()]
    if not rec then
        rec = { score = 0, kills = 0 }
        Slaughter.board[actor:GetUserId()] = rec
    end
    rec.score = rec.score + Slaughter.monScore[monName]
    rec.kills = rec.kills + 1
end

function Slaughter.settle()
    local rank = Slaughter.sortedBoard()
    for i, rec in ipairs(rank) do
        if i <= 50 then
            local tier = math.ceil(i / 10)
            sendmail(rec.id, 8001, "屠魔战场结算",
                "本期排名第 " .. i .. " 名",
                SLAUGHTER_REWARD[tier])
        end
    end
    Slaughter.board = {}
    Slaughter.stage = STAGE.idle
end