【入门夯实】城门耐久触发：攻城守卫的增援写法

local function onGateHit()
    local hp = (tonumber(getsysvar("GateHp")) or 0) - 1000
    setsysvarex("GateHp", hp, 1)
    genmon(0, 300, 300, "沙巴克守卫", 5, 8, 0)
end

local GATE_HP = 500000
local reinforced = false
local function onGateHit(dmg)
    local hp = tonumber(getsysvar("GateHp")) or GATE_HP
    hp = math.max(hp - dmg, 0)
    setsysvarex("GateHp", hp, 1)
    if hp <= GATE_HP / 2 and not reinforced then
        reinforced = true
        genmon(0, 300, 300, "沙巴克守卫", 5, 8, 0)
        sendcentermsg(nil, 249, 255, "城门告急，守卫增援已抵达！", 0, 6, "")
    end
    if hp <= 0 then
        sendcentermsg(nil, 250, 0, "城门告破，攻城方可进入内城！", 0, 10, "")
    end
end

local function resetGate()
    setsysvarex("GateHp", GATE_HP, 1)
    reinforced = false
end

local function repairGate(n)
    local hp = tonumber(getsysvar("GateHp")) or 0
    setsysvarex("GateHp", math.min(hp + n * 2000, GATE_HP), 1)
end