【后端接口】宠物探险：离线探险时长与收益结算

local EXPEDITION_TIERS = { { h = 2, mult = 1.0 }, { h = 8, mult = 1.5 }, { h = 24, mult = 2.0 } }
function Expedition.start(actor, petIdx, tier)
    local pet = actor:GetPet(petIdx)
    if not pet then return false, "宠物不存在" end
    if pet:IsFighting() then return false, "战斗中不可派遣" end
    local tierCfg = EXPEDITION_TIERS[tier]
    if not tierCfg then return false, "无效档位" end
    setplayvar(actor, "HUMAN", "exp_start_" .. petIdx, os.time(), 1)
    setplayvar(actor, "HUMAN", "exp_tier_" .. petIdx, tier, 1)
    setplayvar(actor, "HUMAN", "exp_dur_" .. petIdx, tierCfg.h * 3600, 1)
    sendmsg(actor, 1, pet.name .. " 出发探险，时长 " .. tierCfg.h .. " 小时")
    return true
end

function Expedition.claim(actor, petIdx)
    local startAt = tonumber(getplayvar(actor, "HUMAN", "exp_start_" .. petIdx)) or 0
    local tier = tonumber(getplayvar(actor, "HUMAN", "exp_tier_" .. petIdx)) or 1
    local dur = tonumber(getplayvar(actor, "HUMAN", "exp_dur_" .. petIdx)) or 0
    local elapsed = os.time() - startAt
    if elapsed < dur then return false, "探险尚未完成" end
    local tierCfg = EXPEDITION_TIERS[tier]
    local materials = math.floor(dur / 3600 * tierCfg.mult * 10)
    giveitem(actor, "探险材料", materials, 1, "宠物探险收益")
    setplayvar(actor, "HUMAN", "exp_start_" .. petIdx, 0, 1)
    return true
end

function Expedition.antiCheat(actor, petIdx)
    local startAt = tonumber(getplayvar(actor, "HUMAN", "exp_start_" .. petIdx)) or 0
    if startAt == 0 then return false end
    local elapsed = os.time() - startAt
    if elapsed > 48 * 3600 then
        sendmsg(actor, 1, "探险超时，收益按上限 24 小时结算")
        return false
    end
    return true
end