【玩法策划】市场情报站：物价查询与走势提示玩法

-- 情报站：行情查询
local player = class(actor)
local function queryTrend(player, itemName)
    local today = tonumber(getsysvar("Price_" .. itemName) or 0)
    local week = tonumber(getsysvar("WeekAvg_" .. itemName) or 0)
    if week == 0 or today == 0 then
        sendmsg(player, 1, 0, "该物品成交数据不足，暂无行情。")
        return
    end
    local delta = (today - week) / week
    local trend = delta > 0.3 and "行情火热" or (delta < -0.3 and "低位抄底" or "价格平稳")
    sendmsg(player, 1, 0, itemName .. "：今日均价 " .. today .. "，七日均价 " ..
        week .. "，" .. trend .. "（偏离 " .. string.format("%+.0f%%", delta * 100) .. "）")
end

-- 情报贩子：付费线索
local player = class(actor)
local function buyIntel(player, itemName)
    local sold = tonumber(getsysvar("IntelSold_" .. os.date("%Y%m%d")) or 0)
    if sold >= 20 then
        sendmsg(player, 1, 0, "今日线索已售罄，明日再来。")
        return
    end
    if not checkitemw(player, "金条", 1) then
        sendmsg(player, 1, 0, "情报有价：金条一枚一条。")
        return
    end
    takeitem(player, "金条", 1)
    setsysvarex("IntelSold_" .. os.date("%Y%m%d"), sold + 1, true)
    local trend = tonumber(getsysvar("WeekAvg_" .. itemName) or 0) > 0 and "看涨" or "看跌"
    sendmsg(player, 1, 0, "情报（置信度 70%）：" .. itemName .. " 三日内" .. trend .. "。")
end