当铺预支纹：先支重刀后还账，三刀利息要算清

flowchart TD
A[点预支] --> B{当票清白吗}
B -- 挂账 --> C[拦下 先还账]
B -- 清白 --> D[重刀四十到手]
D --> E[当票三格亮起]
E --> F[后三刀每刀只值二]
F --> G{三笔还清了吗}
G -- 没有 --> F
G -- 还清 --> H[清白之身 再当可期]

 fx-crest-pawn

-- @file CrestPawn.lua
-- 当铺预支纹 —— 先支重刀后还账 三刀利息要算清

local CrestPawn = {}

local CONST = {
    LOAN_DMG      = 40,
    REPAY_HITS    = 3,
    REPAY_DMG     = 2,
    SWING_CD      = 2,

    AUTOINC_BASE  = 1203600,
}

local _debt     = 0
local _loan     = false
local _cd       = 0
local _autoInc  = 0

local function ShowTip(msg)
    if msg and msg ~= "" then SL:ShowSystemTips(msg) end
end

local function GenID()
    _autoInc = _autoInc + 1
    return CONST.AUTOINC_BASE + _autoInc
end

function CrestPawn.Debt() return _debt end

function CrestPawn.Clean() return _debt == 0 end

-- 预支: 当票挂账
function CrestPawn.Pawn()
    if _cd > 0 then
        ShowTip("掌柜的合算盘——再等" .. math.ceil(_cd) .. "秒")
        return false
    end
    if not CrestPawn.Clean() then
        ShowTip("旧账未清——还剩" .. _debt .. "笔轻刀")
        return false
    end
    _cd = CONST.SWING_CD
    _loan = true
    ShowTip("当出一记重刀——后三刀只值二")
    return true
end

-- 命中结账: 重刀落 当票亮
function CrestPawn.Settle()
    if _loan then
        _loan = false
        _debt = CONST.REPAY_HITS
        ShowTip("预支到账——数着当票还")
        return CONST.LOAN_DMG
    end
    if _debt > 0 then
        _debt = _debt - 1
        if _debt == 0 then
            ShowTip("账还清了——清白之身")
        else
            ShowTip("还一笔——剩" .. _debt .. "笔")
        end
        return CONST.REPAY_DMG
    end
    return 14
end

if not _ticker then
    _ticker = SL:Schedule(function(dt)
        if _cd > 0 then _cd = _cd - dt end
    end, 0.05)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("预支!", function()
        CrestPawn.Pawn()
    end)
    ShowTip("技能已加载: 当铺预支纹")
end, 1.0)

function CrestPawn.Unload()
    if _ticker then SL:Unschedule(_ticker) end
    _debt = 0
end

return CrestPawn