【进阶实战】帮派建筑维护费：建筑的持续成本封装

local RATES = { [1] = 5000, [2] = 15000, [3] = 40000 }
local function dailyMaintenance(guildName, buildingId, level)
    local fee = RATES[level] or 0
    local fund = tonumber(getsysvar("Fund_" .. guildName)) or 0
    if fund >= fee then
        setsysvarex("Fund_" .. guildName, fund - fee, 1)
        print(guildName .. " 建筑" .. buildingId .. " 维护费 " .. fee)
    else
        local newLevel = math.max(level - 1, 1)
        setsysvarex("Build_" .. guildName .. "_" .. buildingId, newLevel, 1)
        sendmsg(nil, 1, guildName .. " 建筑因资金不足降级。")
    end
end

local function checkFund(guildName)
    return tonumber(getsysvar("Fund_" .. guildName)) or 0
end