【进阶实战】训练木桩：DPS统计的采样窗口封装

local WINDOW = 5
local sessions = {}
local function beginTest(actor)
    sessions[actor] = { total = 0, hits = 0, start = os.time(),
        curWin = os.time(), curDmg = 0, windows = {} }
    sendmsg(actor, 1, "木桩测试开始，持续输出后结算。")
end
local function onHit(actor, dmg)
    local s = sessions[actor]
    if not s then
        return
    end
    local now = os.time()
    if now - s.curWin >= WINDOW then
        s.windows[#s.windows + 1] = s.curDmg / WINDOW
        s.curWin = now
        s.curDmg = 0
    end
    s.total = s.total + dmg
    s.hits = s.hits + 1
end

local function endTest(actor)
    local s = sessions[actor]
    if not s then
        return
    end
    local dur = os.time() - s.start
    if dur < 1 then
        dur = 1
    end
    local avg = math.floor(s.total / dur)
    local peak = 0
    for _, w in ipairs(s.windows) do
        if math.floor(w) > peak then
            peak = math.floor(w)
        end
    end
    sendmsg(actor, 1, "总伤 " .. s.total .. " 均值 " .. avg
        .. " 峰值 " .. peak .. " 命中 " .. s.hits .. " 次。")
    sessions[actor] = nil
end