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--
-- All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
-- its licensors.
--
-- For complete copyright and license terms please see the LICENSE at the root of this
-- distribution (the "License"). All use of this software is governed by the License,
-- or, if provided, by the license below or the license accompanying this file. Do not
-- remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
--
--
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local DynamicLayoutColumn = 
{
	Properties = 
	{
		ScrollBox = {default = EntityId()},
		DynamicLayout = {default = EntityId()},
		AddColorsButton = {default = EntityId()},
		ColorImage = {default = EntityId()},
	},
}

function DynamicLayoutColumn:OnActivate()
	self.buttonHandler = UiButtonNotificationBus.Connect(self, self.Properties.AddColorsButton)

	self.tickBusHandler = TickBus.Connect(self);
end

function DynamicLayoutColumn:OnTick(deltaTime, timePoint)
	self.tickBusHandler:Disconnect()

	local canvas = UiElementBus.Event.GetCanvas(self.entityId)
	self.canvasNotificationBusHandler = UiCanvasNotificationBus.Connect(self, canvas)		
						
	self:InitContent("StaticData/LyShineExamples/uiTestFreeColors.json")
end


function DynamicLayoutColumn:OnDeactivate()
	self.buttonHandler:Disconnect()
	self.canvasNotificationBusHandler:Disconnect()
end

function DynamicLayoutColumn:OnAction(entityId, actionName)
	if actionName == "ColorClicked" then
		-- Get the index of the child that was pressed
		index = UiElementBus.Event.GetIndexOfChildByEntityId(self.Properties.DynamicLayout, entityId)
		
		-- Get the color at the specified index and set it on the image
		local color = UiDynamicContentDatabaseBus.Broadcast.GetColor(eUiDynamicContentDBColorType_Free, index)
		UiImageBus.Event.SetColor(self.Properties.ColorImage, color)
	end
end

function DynamicLayoutColumn:OnButtonClick()
	if (UiButtonNotificationBus.GetCurrentBusId() == self.Properties.AddColorsButton) then
		self:InitContent("StaticData/LyShineExamples/uiTestMoreFreeColors.json")

		UiInteractableBus.Event.SetIsHandlingEvents(self.Properties.AddColorsButton, false)
	end	
end

function DynamicLayoutColumn:InitContent(jsonFilepath)
	-- Refresh the dynamic content database with the specified json file
	UiDynamicContentDatabaseBus.Broadcast.Refresh(eUiDynamicContentDBColorType_Free, jsonFilepath)
	
	-- Set the number of children for the layout element based on the number of colors in the dynamic content database
	local numColors = UiDynamicContentDatabaseBus.Broadcast.GetNumColors(eUiDynamicContentDBColorType_Free)
	UiDynamicLayoutBus.Event.SetNumChildElements(self.Properties.DynamicLayout, numColors)

	for i=0,numColors-1 do
		-- Get child of the layout
		local child = UiElementBus.Event.GetChild(self.Properties.DynamicLayout, i)
		
		-- Get the image of the child and set the color
		local image = UiElementBus.Event.FindChildByName(child, "Color")
		local color = UiDynamicContentDatabaseBus.Broadcast.GetColor(eUiDynamicContentDBColorType_Free, i)
		UiImageBus.Event.SetColor(image, color)
		
		-- Get the text of the child and set the name
		local text = UiElementBus.Event.FindChildByName(child, "Name")
		local name = UiDynamicContentDatabaseBus.Broadcast.GetColorName(eUiDynamicContentDBColorType_Free, i)
		UiTextBus.Event.SetText(text, name)
	end
	
	-- Force the hover interactable to be the scroll box.
	-- The scroll box is set to auto-activate, but it could still have the hover
	-- since it starts out having no children. Now that it may contain children,
	-- force it to be the hover in order to auto-activate it and pass the hover to its child.
	-- Ensure that the layouts of the newly added children are up to date by forcing an
	-- immediate recompute. This is necessary for the scroll box to correctly determine
	-- which of its children should get the hover
	local canvas = UiElementBus.Event.GetCanvas(self.entityId)
	UiCanvasBus.Event.RecomputeChangedLayouts(canvas)
	UiCanvasBus.Event.ForceHoverInteractable(canvas, self.Properties.ScrollBox)
end

return DynamicLayoutColumn