行商换纹：怪倒摊子摆开，三选一别挑花眼

flowchart TD
A[斩倒怪] --> B[掉两文钱]
B --> C[摊子摆开三货]
C --> D[换看挑货]
D --> E{钱够两文吗}
E -- 不够 --> F[摇扇送客]
E -- 够了 --> G[买下 入账]
G --> H[摊收 下一场]
F --> H
H --> A

 fx-crest-merchant

-- @file CrestMerchant.lua
-- 行商换纹 —— 怪倒摊子摆开 三选一别挑花眼

local CrestMerchant = {}

local CONST = {
    STALL_TIME    = 3,
    COST          = 2,
    WARE_N        = 3,

    AUTOINC_BASE  = 1203200,
}

local WARE_NAME = { "重刀", "血囊", "汲血" }

local _coin     = 2
local _open     = false
local _left     = 0
local _wares    = { 1, 2, 3 }
local _sel      = 1
local _atk      = 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 CrestMerchant.Coin() return _coin end
function CrestMerchant.Dmg() return 14 + _atk end

-- 开摊: 货表重洗
function CrestMerchant.Open()
    _coin = _coin + 2
    for i = CONST.WARE_N, 2, -1 do
        local j = math.random(i)
        _wares[i], _wares[j] = _wares[j], _wares[i]
    end
    _sel = 1
    _open = true
    _left = CONST.STALL_TIME
    ShowTip("摊子摆开——两文一件")
end

-- 换看与买定
function CrestMerchant.Cycle()
    _sel = _sel % CONST.WARE_N + 1
    ShowTip("看第" .. _sel .. "件:"
        .. WARE_NAME[_wares[_sel]])
end

function CrestMerchant.Buy()
    if not _open then return end
    if _coin < CONST.COST then
        ShowTip("钱不够——摊主摇扇送客")
        return
    end
    _coin = _coin - CONST.COST
    ShowTip(WARE_NAME[_wares[_sel]] .. "入手!")
    _open = false
end

if not _ticker then
    _ticker = SL:Schedule(function(dt)
        if not _open then return end
        _left = _left - dt
        if _left <= 0 then
            _open = false
            ShowTip("摊主收摊——下一场再来")
        end
    end, 0.05)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("换看", function() CrestMerchant.Cycle() end)
    SL:BindDebugButton("买下", function() CrestMerchant.Buy() end)
    ShowTip("技能已加载: 行商换纹")
end, 1.0)

function CrestMerchant.Unload()
    if _ticker then SL:Unschedule(_ticker) end
    _open = false
end

return CrestMerchant