回声记忆：看完灯序敲一遍

fx-memory

local EchoMemory = {}
local CONST = { KEY = "EchoMemory", SHOW_ON = 0.15, SHOW_OFF = 0.4 }

function EchoMemory.Start()
    EchoMemory._seq, EchoMemory._input = {}, {}
    EchoMemory._round = 0
    EchoMemory:NextRound()
end

function EchoMemory:NextRound()
    self._round = self._round + 1
    table.insert(self._seq, math.random(1, 4))          -- 序列加一节
    self._showIdx, self._showT = 0, 0
    self._phase = "show"                                -- 播放期: 锁输入
    self._showSched = SL:Schedule(function(dt)
        self:UpdateShow(dt)
    end, 0.02)
end

function EchoMemory:UpdateShow(dt)
    self._showT = self._showT + dt
    local cycle = CONST.SHOW_ON + CONST.SHOW_OFF
    local idx = math.floor(self._showT / cycle)
    if idx >= #self._seq then                           -- 播完: 开放输入
        SL:UnSchedule(self._showSched)
        self._phase = "input"
        self._input = {}
        SL:ShowSystemTips("第 " .. self._round .. " 轮 · 复敲一遍")
        return
    end
    self._glow = (self._showT % cycle < CONST.SHOW_ON)
        and self._seq[idx + 1] or 0
end

function EchoMemory.OnTap(slot)
    if EchoMemory._phase ~= "input" then return end     -- 播放期敲灯无效
    local n = #EchoMemory._input + 1
    EchoMemory._input[n] = slot
    if slot ~= EchoMemory._seq[n] then
        SL:ShowSystemTips("记错了! 到第 " .. EchoMemory._round .. " 轮")
        EchoMemory._seq = {}
        return
    end
    if n >= #EchoMemory._seq then
        SL:ShowSystemTips("全对! 下一轮")
        EchoMemory:NextRound()
    end
end

return EchoMemory