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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 FadeButton = 
{
    Properties = 
    {
		FaderEntity = {default = EntityId()},
		FadeValueSlider = {default = EntityId()},
		FadeSpeedMinusButton = {default = EntityId()},
		FadeSpeedPlusButton = {default = EntityId()},
		FadeSpeedText = {default = EntityId()},
    },
}

function FadeButton:OnActivate()
	-- Connect to the button notification bus on our entity to know when to start the animation
	self.animButtonHandler = UiButtonNotificationBus.Connect(self, self.entityId)
	-- Connect to the slider notification bus to know what fade value to give to the animation
	self.sliderHandler = UiSliderNotificationBus.Connect(self, self.Properties.FadeValueSlider)
	-- Connect to the button notification buses of the minus and plus buttons to know when to change the fade speed
	self.minusButtonHandler = UiButtonNotificationBus.Connect(self, self.Properties.FadeSpeedMinusButton)
	self.plusButtonHandler = UiButtonNotificationBus.Connect(self, self.Properties.FadeSpeedPlusButton)
	
	-- Initialize the fade value (needs to be the same as the start fade value slider value)
	self.fadeValue = 0
	-- Initialize the fade speed (needs to be the same as the start fade speed text)
	self.fadeSpeed = 5
end

function FadeButton:OnDeactivate()
	-- Disconnect from all our buses
	self.animButtonHandler:Disconnect()
	self.sliderHandler:Disconnect()
	self.minusButtonHandler:Disconnect()
	self.plusButtonHandler:Disconnect()
end

function FadeButton:OnSliderValueChanging(percent)
	-- Set the fade value to the slider value
	self.fadeValue = percent / 100
end

function FadeButton:OnSliderValueChanged(percent)
	-- Set the fade value to the slider value
	self.fadeValue = percent / 100
end

function FadeButton:OnButtonClick()
	-- If the animation button was clicked
	if (UiButtonNotificationBus.GetCurrentBusId() == self.entityId) then
		-- Start the fade animation
		UiFaderBus.Event.Fade(self.Properties.FaderEntity, self.fadeValue, self.fadeSpeed)
		
	-- Else if the minus button was clicked
	elseif (UiButtonNotificationBus.GetCurrentBusId() == self.Properties.FadeSpeedMinusButton) then
		-- Decrement the animation speed (min = 1)
		self.fadeSpeed = math.max(1, self.fadeSpeed - 1)
		-- And update the text
		UiTextBus.Event.SetText(self.Properties.FadeSpeedText, self.fadeSpeed)
		
	-- Else the plus button was clicked
	else
		-- Decrement the animation speed (max = 10)
		self.fadeSpeed = math.min(self.fadeSpeed + 1, 10)
		-- And update the text
		UiTextBus.Event.SetText(self.Properties.FadeSpeedText, self.fadeSpeed)
	end
end

return FadeButton