--LogicRandom 只是用于逻辑中使用，不能用于表现
local LogicRandom = {}

local RandomCount = 1000
local RandomCache = LuaExt.CreateTable(RandomCount, 0)

local _randomPool = LuaExt.CreateTable(RandomCount, 0)
local _randomIndex = 1

local FP = FP

--返回定点数(前闭后闭)
function LogicRandom.GetRandom01(entity ,markid)
    local result = _randomPool[_randomIndex]
    
    if result then
        -- CompareSyncLogManager.TryColectLog(LuaConst.CheckBattleLogType.RandomNum , entity , _randomIndex , markid  , result[1])
    else
        logging.error(LTAG.ERROR, "【gws】 ：发现了随机数是空的情况 ，randomindex =", _randomIndex)
    end

    _randomIndex = _randomIndex + 1
    if _randomIndex > RandomCount then
        _randomIndex = 1
    end
        
    return result
end

--返回定点数
function LogicRandom.GetRangeValue(entity, minValue, maxValue, markid)
    local random01 = LogicRandom.GetRandom01(entity ,markid)
    local result = FP.newV1(0)
    result:Reset(maxValue):Sub(minValue):Mul(random01):Add(minValue)
    return result
end

--返回number 整数 给索引类用（前闭后闭）
function LogicRandom.GetIntegerValue(entity, minValue, maxValue, markid)
    local random01 = LogicRandom.GetRandom01(entity ,markid)
    local result = FP.newV1(0)
    result:Reset(maxValue):Sub(minValue):Add(0.999):Mul(random01):Add(minValue)
    result = FP.Math.Floor(result)
    return FP.tonumberV1(result)
end

--设置随机数
function LogicRandom.SetRandomPool(seed)
    LuaExt.RandomBySeed(seed, RandomCount, RandomCache)
    for i = 1, RandomCount do
        if _randomPool[i] then
            _randomPool[i]:Reset(RandomCache[i])
        else
            _randomPool[i] = FP.newV1(RandomCache[i])
        end
	end
    _randomIndex = 998
end

--在圆心为(0,0)的圆中随机1个坐标，FP.V2
function LogicRandom.GetRandomPointInCircle(entity,radius ,markid ,result)
    -- local rho = LogicRandom.GetRangeValue(entity, 0, radius ,markid)        --极坐标ρ
    -- local theta = LogicRandom.GetRangeValue(entity, FP.Const.Zero, FP.Const.PI2 ,markid)    --极坐标θ
    -- local sin = FP.Math.Sin(theta)
    -- local cos = FP.Math.Cos(theta)
    -- result = result or FP.newV2(0, 0)
    -- result.x:Reset(rho):Mul(cos)
    -- result.z:Reset(rho):Mul(sin)
    -- return result
    return LogicRandom.GetRandomPointInRing(entity, 0, radius, markid, result)
end

--在圆心为(0,0)、指定内径和外径的圆环中随机1个坐标，FP.V2
function LogicRandom.GetRandomPointInRing(entity, innerRadius, outterRadius, markid ,result)
    local rho = LogicRandom.GetRangeValue(entity, innerRadius, outterRadius ,markid)        --极坐标ρ
    local theta = LogicRandom.GetRangeValue(entity, FP.Const.Zero, FP.Const.PI2 ,markid)    --极坐标θ
    local sin = FP.Math.Sin(theta)
    local cos = FP.Math.Cos(theta)
    result = result or FP.newV2(0, 0)
    result.x:Reset(rho):Mul(cos)
    result.z:Reset(rho):Mul(sin)
    return result
end

--随机一个点，x取值范围[-width/2, width/2],  y取值范围[-height/2, height/2]。
--注意关卡元素的Length指的是x方向上的长度，Width指的是z方向上的长度，分别对应这里参数的width和height
function LogicRandom.GetRandomPointInRect(entity, width, height, markid, result)
    local x = LogicRandom.GetRangeValue(entity, -width / 2, width / 2 , markid)
    local z = LogicRandom.GetRangeValue(entity, -height / 2, height / 2 , markid)
    result = result or FP.newV2(0, 0)
    result.x:Reset(x)
    result.z:Reset(z)
    return result
end

function LogicRandom.GetRandomPointInLevelItem(entity, itemData, markid, result)
    local pos = result or FP.newV2(0, 0)
    --itemData.Type -- 0:点   1:圆    2:矩形
    if itemData.Type == LuaConst.EBornItemAreaType.POINT then
        pos:Reset(itemData.ItemPos)
    elseif itemData.Type == LuaConst.EBornItemAreaType.CIRCLE then
        LogicRandom.GetRandomPointInCircle(entity, itemData.Radius, markid, pos):Add(itemData.ItemPos)
    elseif itemData.Type == LuaConst.EBornItemAreaType.RECT then
        --关卡元素里，Length是x轴的长度，Width是z轴的长度
        LogicRandom.GetRandomPointInRect(entity, itemData.Length, itemData.Width, markid, pos):Add(itemData.ItemPos)
    else
        if itemData.LevelItemType ~= LuaConst.LevelItemType.TargetPoint then
            logging.error(LTAG.ERROR, "HYW : 非法的出生点关卡元素形状类型 : ", itemData.type, "     元素ID : ", itemData.LevelItemID)
        end
        pos:Reset(itemData.ItemPos)
    end
    return pos
end

return LogicRandom