local internalNpcName = "Flickering Soul"
local npcType = Game.createNpcType(internalNpcName)
local npcConfig = {}

npcConfig.name = internalNpcName
npcConfig.description = internalNpcName

npcConfig.health = 100
npcConfig.maxHealth = npcConfig.health
npcConfig.walkInterval = 0
npcConfig.walkRadius = 0

npcConfig.outfit = {
	lookType = 1219,
	lookHead = 6,
	lookBody = 26,
	lookLegs = 26,
	lookFeet = 6,
	lookAddons = 0,
	lookMount = 0,
}

npcConfig.flags = {
	floorchange = false,
}

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)

npcType.onThink = function(npc, interval)
	npcHandler:onThink(npc, interval)
end

npcType.onAppear = function(npc, player)
	npcHandler:onAppear(npc, player)
end

npcType.onDisappear = function(npc, player)
	npcHandler:onDisappear(npc, player)
end

npcType.onMove = function(npc, player, fromPosition, toPosition)
	npcHandler:onMove(npc, player, fromPosition, toPosition)
end

npcType.onSay = function(npc, player, type, message)
	npcHandler:onSay(npc, player, type, message)
end

npcType.onCloseChannel = function(npc, player)
	npcHandler:onCloseChannel(npc, player)
end

local function playerSayCallback(npc, player, type, message)
	if not npcHandler:checkInteraction(npc, player) then
		return false
	end

	local soulWarQuest = player:soulWarQuestKV()

	local playerId = player:getId()
	if MsgContains(message, "living") then
		npcHandler:say("It has been a while since I roamed the world of the living in a mortal shell.", npc, player)
	elseif MsgContains(message, "mortal") then
		npcHandler:say("I had many names in my live. The one that would be the most recognizable is probably the name Goshnar. Even that was an assumed name that I took when I left my mundane past behind.", npc, player)
	elseif MsgContains(message, "Goshnar") then
		npcHandler:say({
			"I was once known as the necromant king. ...",
			"For some it was meant as a curse, others used the name with reverence. To me it was just another stepping stone, in a life that burned with ambition.",
		}, npc, player, 4000)
	elseif MsgContains(message, "ambition") then
		npcHandler:say({
			"My ambitions were high and knew no limits. Mastery over life and death was but a milestone that I wanted to accomplish. In the end I aspired probably somewhat like godhood. ...",
			"Though in hindsight even that wouldn't have been enough. There was a hunger in me that nothing could put to rest.",
		}, npc, player, 4000)
	elseif MsgContains(message, "milestone") then
		npcHandler:say("Everything in my life was just a tool to further my goals. The brotherhood of bones was just a tool for me. As was everyone or everything. In the path I had chosen nothing mattered but me and my ambitions.", npc, player)
	elseif MsgContains(message, "everything") then
		npcHandler:say("Necromancy was a passion at first, another tool while I amassed power and a crutch when my ambitions surpassed that what it could accomplish.", npc, player)
	elseif MsgContains(message, "accomplish") then
		npcHandler:say({
			"I was so convinced about my brilliance, my greatness, my destiny. And this hunger for more, it let me not have peace at any point in my life. I was always driven. There was no time to rest. ...",
			"And there was no looking back. I never cared to remember my humble beginnings, what I had sacrificed to get where I was. All that I had left behind and that I had lost forever. ...",
			"Now I see the bitter irony. I could bring back the dead, but I couldn't create second chances. I couldn't restore the truly important things that I had lost.",
		}, npc, player, 4000)
	elseif MsgContains(message, "dead") then
		npcHandler:say("My demise did not meet me unprepared. As a powerful necromancer I had fettered my soul in the living world and the realms beyond. I had prepared for my return and was confident in my power.", npc, player)
	elseif MsgContains(message, "confident") then
		npcHandler:say("My soul wandered the plains of Zarganash, waiting for my wards to power up. Waiting for my soul to be slowly pulled back and manifest in the world of the living once again. What I had not taken into consideration was peace.", npc, player)
	elseif MsgContains(message, "peace") then
		npcHandler:say({
			"Zarganash was not a place without its dangers, but for a soul as powerful as mine, there was little threat at all. For the first time in my existence I had to stop running forward. I had to wait for things to fit into their places. ...",
			"And me, who had seen things that horrible, they would have obliterated a lesser man's mind, finally took the time to look back. And what I saw was frightening in its own right. ...",
			"A great tiredness overcame me. With the flames of my ambitions calming down for the first time since I could remember, all my aspirations and plans seemed to petty and futile. ...",
			"Everything I had worked for and my plans for the things to come seemed pointless, and the things I had lost and never allowed myself to experience weighed heavily on my soul.",
		}, npc, player, 4000)
	elseif MsgContains(message, "soul") then
		npcHandler:say({
			"I talked to other souls, lost in Zarganash, and most of them seemed like mirrors to myself. Their faults, their shortcomings, the things that were important to them and the things they had lost. ...",
			"It was all like miniature copies of my own grand plans and losses. It made me think. And the great tiredness weighed even more heavy on me. A weariness of the world, of the hunger that drove me.",
		}, npc, player, 4000)
	elseif MsgContains(message, "weariness") then
		npcHandler:say({
			"Then I met a wise soul. A teacher that did not lecture. I never was impressed by anything but my own accomplishments. But the inner balance and peace of this soul, it did impress me. A lot. ...",
			"I, who fancied myself to have been the epitome of knowledge, learned things that were entirely new to me. But this knowledge wasn't about power. It was about me.",
		}, npc, player, 4000)
	elseif MsgContains(message, "knowledge") then
		npcHandler:say("I recognized the extent of my folly and failure. I decided not to return to the world of the living.", npc, player)
	elseif MsgContains(message, "return") then
		npcHandler:say({
			"I decided to stay here, even pass on into the great beyond at some point. Yet I still feel the pull of my fetters. I can faintly hear those who think they are my followers, calling to me.",
			"And I feel others, many others who crave my powers and try to bring me back for their own gain.",
		}, npc, player, 4000)
	elseif MsgContains(message, "fetters") then
		npcHandler:say({
			"Over my time in Zarganash I split away the parts of me that my worldly fetters were bound to. Yet I had to recognize that they are still a part of me and I'm bound to them. ...",
			"The fetters and the efforts to call me back are empowering them. I feel them growing in strength and gaining awareness on their own. ...",
			"They are beginning to feed not only on the fetters and incarnations but also on me. As I grow weaker, they grow more powerful over time.",
		}, npc, player, 4000)
	elseif MsgContains(message, "powerful") then
		npcHandler:say("The only way I can get rid of them is to disperse them, to 'kill' them so to say. But they are tainted parts of myself and even going near them might endanger my sanity and stability. So all I can do is to ask you to do this daunting task.", npc, player)
	elseif MsgContains(message, "task") then
		local soulWarQuest = player:soulWarQuestKV()
		-- Checks if the boss has already been defeated
		if soulWarQuest:get("goshnar's-megalomania-killed") then
			npcHandler:say({
				"You did it! For the first time I can feel free from the pull of my past. Now I'm free at last. ...",
				"I might stay a while and teach other souls about the inner peace, but will eventually pass on. Thank you so much, my hero. My eternal gratitude and blessings will be with you!",
			}, npc, player, 2000)
			npcHandler:setTopic(playerId, 2)
			player:addOutfit("Revenant")
		else
			npcHandler:say("I'm aware I have no right to ask and I have little to offer as a payment, but I ask you nonetheless. Will you face my fettered vices and destroy them for me?", npc, player)
			npcHandler:setTopic(playerId, 1)
		end
	elseif MsgContains(message, "yes") and npcHandler:getTopic(playerId) == 1 then
		npcHandler:say("Thank you for accepting this burden.", npc, player)
		soulWarQuest:set("teleport-access", true)
	elseif MsgContains(message, "burden") then
		npcHandler:say({
			"You will have to reach each of the negative parts of my personality that I split away. They are hidden deep in the depths of Zarganash and will have corrupted and twisted their surroundings into dangerous nightmares. ...",
			"Even worse, you'll likely encounter minions of those who want to claim my soul as their prize for their own depraved reasons. You will have to destroy my shards to set me free.",
		}, npc, player, 5000)
	elseif MsgContains(message, "shards") then
		npcHandler:say("You haven't killed Malice yet. You haven't killed Hatred yet. You haven't killed Spite yet. You haven't killed Cruelty yet. You haven't killed Greed yet.", npc, player)
	elseif MsgContains(message, "hate") then
		npcHandler:say({
			"I hated the world for its flaws and the reluctance of people to comply with my will. I was convinced I was destined for greatness and to change everything. Ordinary beings were far beneath me and my consideration. ...",
			"All this opposition, all the wars were a nuisance on my way to greatness. I would have sacrificed the whole world to reach my goals.",
		}, npc, player, 4000)
	elseif MsgContains(message, "fermuba") then
		npcHandler:say("My daughter was as ambitious as me, yet she lacked my intellect and my raw talent. She still was great and talented yet I sadly let her feel my disdain. One of the many errors that my way of hubris made me do.", npc, player)
	elseif MsgContains(message, "ferumbras") then
		npcHandler:say({
			"Even in the lands of the dead, this one caused a stir. The dead were whispering his name. It made me feel jealous and angry at first, but at some point, after much self-reflection, I could recognize my own faults in the stories about him.",
			"It was almost like looking into a mirror for the first time. However, he lived way later than me, and I never met his soul here, so I can't tell more about him.",
		}, npc, player, 4000)
	elseif MsgContains(message, "grandson") then
		npcHandler:say(" I'm not aware of the fate of my linage. Neither I'm able to relate to the mortal world in that way. Each of us is an individual, not bound by ties of blood or herritage.", npc, player)
	elseif MsgContains(message, "pale worm") then
		npcHandler:say("His avatar might be destroyed for now and it'd grip on Zarganash considerably weakened. Yet he burrowed to deep into the essence of this realm to be annihilated this easy.", npc, player)
	elseif MsgContains(message, "necromant king") then
		npcHandler:say({
			"They called me the necromant king, in an act of reverence, but to me it was always more of a slander. To limit my greatness to this insignificant aspect was an insult to my ego. But I let it slip for the greater good. ...",
			"I felt it was beneath me to correct them and I went along.",
		}, npc, player, 4000)
	elseif MsgContains(message, "minions") or MsgContains(message, "followers") then
		npcHandler:say("I despised my followers for their petty agendas and for their limited vision of my own goals and personality.", npc, player)
	elseif MsgContains(message, "shards") then
		local bossesYetToDefeat = {}
		for bossName, _ in pairs(SoulWarQuest.miniBosses) do
			if not soulWarQuest:get(bossName) then
				table.insert(bossesYetToDefeat, bossName)
			end
		end

		local message
		if #bossesYetToDefeat > 0 then
			message = "You haven't killed " .. table.concat(bossesYetToDefeat, ", ") .. " yet."
		else
			message = "You have defeated all the Goshnar's Bosses. Your soul shines brighter with each victory."
		end
		npcHandler:say(message, npc, player)
	elseif MsgContains(message, "taints") or MsgContains(message, "penalties") then
		if player:getTaintLevel() ~= nil then
			player:resetTaints(true)
			npcHandler:say("I have cleansed you from the taints that you carried with you. You are now free from the burden that you should not have to bear.", npc, player)
			return
		end

		npcHandler:say("You are not tainted by the darkness of the world. You are pure and free from the burdens that others carry.", npc, player)
	end
	return true
end

npcHandler:setCallback(CALLBACK_MESSAGE_DEFAULT, playerSayCallback)

npcHandler:setMessage(MESSAGE_GREET, "Be greeted, living soul!")

npcHandler:addModule(FocusModule:new(), npcConfig.name, true, true, true)

-- npcType registering the npcConfig table
npcType:register(npcConfig)
