WidgetLibrary = WidgetLibrary or {}


--- 设置
---@param widget UUserWidget
---@param offset float
function WidgetLibrary.SetWidgetToRightBorder(widget, offset)
	if not widget then return end
	local slot = WidgetLayoutLibrary.SlotAsCanvasSlot(widget)
	slot:SetAnchors({ Minimum = { X = 1, Y = 0 }, Maximum = { X = 1, Y = 0 } })
	slot:SetAlignment({ X = 1, Y = 0 })
	local offsets = slot:GetOffsets()
	slot:SetOffsets({ Left = offset, Right = offsets.Right, Bottom = offsets.Bottom, Top = offsets.Top })
end

--- 为防止被清除做出的全局处理
function WidgetLibrary.BindButtonClicked(TargetButton, Func, Obj)
	TargetButton.OnClicked:Add(Func, Obj)
end

--- 为防止被清除做出的全局处理
function WidgetLibrary.BindButtonPressed(TargetButton, Func, Obj)
	TargetButton.OnPressed:Add(Func, Obj)
end

--- 为防止被清除做出的全局处理
function WidgetLibrary.BindButtonReleased(TargetButton, Func, Obj)
	TargetButton.OnReleased:Add(Func, Obj)
end


--- 绑定UI文本
function WidgetLibrary.TextBlockBindingPropertyText(TargetTextBlock, Func, Obj)
    TargetTextBlock:BindingProperty("Text", Func, Obj)
end

function WidgetLibrary.BindingPropertyChange(DelegationPropertyName, TargetWidgetItem, Func, Obj)
    TargetWidgetItem:BindingProperty(DelegationPropertyName, Func, Obj)
end

--- 直接绑定按键点击打开WidgetManager的页面
function WidgetLibrary.ButtonOnClickShowPanel(TargetButton, UIType, bIsShow)
    if bIsShow == nil then
        bIsShow = true
    end
    TargetButton.OnClicked:Add(
        function()
            if bIsShow then
                WidgetManager:ShowPanel(UIType, false)
            else
                WidgetManager:ClosePanel(UIType)
            end
        end
    )
end

function WidgetLibrary.SliderOnValueChanged(Slider, Func, Obj)
    Slider.OnValueChanged:Add(Func, Obj)
end

--- Widget对齐到世界坐标
---@ActorPos Vector
---@param CanvasSlot UCanvasPanelSlot
function WidgetLibrary.SetWidgetAlignToWorldPosition(ActorPos, CanvasSlot)
	local IsOnScreen, WidgetPosition = WidgetLayoutLibrary.ProjectWorldLocationToWidgetPosition(UGCSystemLibrary.GetLocalPlayerController(), ActorPos, {X = 0, Y = 0});

    -- 获取屏幕视口尺寸信息
    local VPSize = WidgetLayoutLibrary.GetViewportSize(UGCSystemLibrary.GetLocalPlayerController())
    local VPScale = WidgetLayoutLibrary.GetViewportScale(UGCSystemLibrary.GetLocalPlayerController())
    local WidgetSize = VectorHelper.MulNumber2D(VPSize, 1 / VPScale)

    -- 获取插槽尺寸信息
    local CompSize = CanvasSlot:GetSize()
    local MidCompSize = VectorHelper.MulNumber2D(CompSize, 0.5)

    -- 获取移动位置范围
    local TargetPosMin = MidCompSize
    local TargetPosMax = VectorHelper.Sub2D(WidgetSize, MidCompSize)

    local TargetDir = nil
    -- Actor判断是否在视锥范围内
    if not (IsOnScreen and VectorHelper.Vector2DInRange(WidgetPosition, TargetPosMin, TargetPosMax)) then
        -- 获取目标位置到相机的向量映射到相机平面的向量
        local LocalCamera = UGCSystemLibrary.GetLocalPlayerController().PlayerCameraManager
        local CameraPos = LocalCamera:K2_GetActorLocation()
        local CameraForward = LocalCamera:GetActorForwardVector()
        local ActorToCameraVector = VectorHelper.Sub(ActorPos, CameraPos)
        local PlaneVector = KismetMathLibrary.ProjectVectorOnToPlane(ActorToCameraVector, CameraForward)

        -- 将平面向量旋转至原点
        local RotatorPlaneVector = KismetMathLibrary.NegateRotator(KismetMathLibrary.Conv_VectorToRotator(CameraForward))
        local NormalPlaneVector = KismetMathLibrary.GreaterGreater_VectorRotator(PlaneVector, RotatorPlaneVector)

        -- 获取屏幕的方向向量
        TargetDir = {X = NormalPlaneVector.Y, Y = -NormalPlaneVector.Z}
        TargetDir = VectorHelper.MulNumber2D(TargetDir, 1 / VectorHelper.Length2D(TargetDir))

        -- 判断屏幕及方向向量的斜率
        if math.abs(TargetDir.Y / TargetDir.X) < WidgetSize.Y / WidgetSize.X then
            WidgetPosition.X = ((TargetDir.X < 0) and TargetPosMin.X or TargetPosMax.X)
            WidgetPosition.Y = ((WidgetSize.X / 2 - MidCompSize.X) / math.abs(TargetDir.X) * TargetDir.Y +  WidgetSize.Y / 2)
        else
            WidgetPosition.Y = ((TargetDir.Y < 0) and TargetPosMin.Y or TargetPosMax.Y)
            WidgetPosition.X = ((WidgetSize.Y - MidCompSize.Y) / 2 / math.abs(TargetDir.Y) * TargetDir.X +  WidgetSize.X / 2)
        end
    end
    return WidgetPosition, TargetDir

end