【框架设计】PK 模式：攻击范围的开关与误伤保护

---PK 模式：四种攻击范围
local PK_MODES = { "peace", "team", "guild", "all" }

function PK.setMode(actor, mode)
    local player = class(actor)
    if not player then return false end
    -- 切换的冷却 10 秒，防战斗中瞬间反悔
    local last = tonumber(getplayvar(actor, 2, "ModeCD")) or 0
    if os.time() - last < 10 then
        sendmsg(actor, 1, "切换过于频繁")
        return false
    end
    setplayvar(actor, "HUMAN", "PKMode", mode, 0)
    setplayvar(actor, "HUMAN", "ModeCD", os.time(), 0)
    local names = { peace = "和平", team = "组队",
        guild = "行会", ["all"] = "全体" }
    sendmsg(actor, 1, "PK 模式切换为：" .. names[mode])
    return true
end

---攻击的合法性校验：模式与关系的裁决
function PK.canAttack(actor, targetId)
    local player = class(actor)
    if not player then return false end
    local mode = getplayvar(actor, 2, "PKMode") or "peace"
    if mode == "peace" then
        sendmsg(actor, 1, "和平模式下无法攻击玩家")
        return false
    end
    if mode == "team" and PK.sameTeam(actor, targetId) then
        return false    -- 队友不受伤
    end
    if mode == "guild" and PK.sameGuild(actor, targetId) then
        return false    -- 会友不受伤
    end
    -- 新手保护：30 级以下不可被攻击
    local target = getplayerbyname(targetId)
    if target and target:GetLevel() < 30 then
        sendmsg(actor, 1, "对方受新手保护")
        return false
    end
    return true
end