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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 gameplayMultiHandler = require('Scripts.Utils.Components.GameplayUtils')

local ordered_event_combination = 
{
    Properties = 
    {
		IncomingGameplayEventNames = {"",},
		OutgoingGameplayEventName = "",
		TimeToCompleteAllEvents = 1,
    },
	BusIds = {},
	DeprecatedBusIds = {},
	Handlers = {},
	DeprecatedHandlers = {},
}

function ordered_event_combination:OnActivate()
	for nameCount = 1, #self.Properties.IncomingGameplayEventNames do
		self.BusIds[nameCount] = GameplayNotificationId(self.entityId, self.Properties.IncomingGameplayEventNames[nameCount], "float")
		self.Handlers[nameCount] = gameplayMultiHandler.ConnectMultiHandlers{
			[self.BusIds[nameCount]] = {
			OnEventBegin = function(floatValue) self:OnEventBegin(floatValue) end,
			},
		}

		-- support for deprecated APIs.  This will be removed in 1.12
		self.DeprecatedBusIds[nameCount] = GameplayNotificationId(self.entityId, self.Properties.IncomingGameplayEventNames[nameCount])
		self.DeprecatedHandlers[nameCount] = gameplayMultiHandler.ConnectMultiHandlers{
			[self.DeprecatedBusIds[nameCount]] = {
			OnEventBegin = function(floatValue) self:OnDeprecatedHandlerEventBegin(floatValue) end,
			},
		}
	end
	
	self.nextExpectedEventIndex = 1
	self.nextExpectedDeprecatedEventIndex = 1
	self.accumulatedTime = 0
end

function ordered_event_combination:OnDeactivate()
	for nameCount = 1, #self.Properties.IncomingGameplayEventNames do
		self.Handlers[nameCount]:Disconnect()
		self.DeprecatedHandlers[nameCount]:Disconnect()
	end
	self.TickHandler:Disconnect()
end

function ordered_event_combination:OnDeprecatedHandlerEventBegin(floatValue)
	self.TickHandler = TickBus.Connect(self, 0)
	if GameplayNotificationBus.GetCurrentBusId() == self.DeprecatedBusIds[self.nextExpectedDeprecatedEventIndex] then
		self.nextExpectedDeprecatedEventIndex = self.nextExpectedDeprecatedEventIndex + 1
		if (self.nextExpectedDeprecatedEventIndex > #self.Properties.IncomingGameplayEventNames) then
			self:Reset(true, floatValue)
		end
	elseif self.nextExpectedDeprecatedEventIndex > 1 then
		self:Reset(false, 0)
	end
end

function ordered_event_combination:OnEventBegin(floatValue)
	self.TickHandler = TickBus.Connect(self, 0)
	if GameplayNotificationBus.GetCurrentBusId() == self.BusIds[self.nextExpectedEventIndex] then
		self.nextExpectedEventIndex = self.nextExpectedEventIndex + 1
		if (self.nextExpectedEventIndex > #self.Properties.IncomingGameplayEventNames) then
			self:Reset(true, floatValue)
		end
	elseif self.nextExpectedEventIndex > 1 then
		self:Reset(false, 0)
	end
end

function ordered_event_combination:OnTick(dt, scriptTime)
	if self.nextExpectedEventIndex == 1 then 
		self.TickHandler:Disconnect()
		return
	end
	self.accumulatedTime = self.accumulatedTime + dt
	if self.accumulatedTime > self.Properties.TimeToCompleteAllEvents then
		self:Reset(false, 0)
	end
end

function ordered_event_combination:Reset(success, floatValue)
	self.TickHandler:Disconnect()
	self.nextExpectedEventIndex = 1
	self.nextExpectedDeprecatedEventIndex = 1
	self.accumulatedTime = 0
	if success then
		GameplayNotificationBus.Event.OnEventBegin(GameplayNotificationId(self.entityId, self.Properties.OutgoingGameplayEventName), floatValue)
		GameplayNotificationBus.Event.OnEventBegin(GameplayNotificationId(self.entityId, self.Properties.OutgoingGameplayEventName, "float"), floatValue)
	else
		GameplayNotificationBus.Event.OnEventEnd(GameplayNotificationId(self.entityId, self.Properties.OutgoingGameplayEventName), floatValue)
		GameplayNotificationBus.Event.OnEventEnd(GameplayNotificationId(self.entityId, self.Properties.OutgoingGameplayEventName, "float"), floatValue)
	end
end

return ordered_event_combination