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

npcConfig.name = internalNpcName
npcConfig.description = internalNpcName

npcConfig.health = 100
npcConfig.maxHealth = npcConfig.health
npcConfig.walkInterval = 2000
npcConfig.walkRadius = 2

npcConfig.outfit = {
	lookType = 132,
	lookHead = 97,
	lookBody = 93,
	lookLegs = 36,
	lookFeet = 93,
	lookAddons = 0,
}

npcConfig.flags = {
	floorchange = false,
	profession = "banker",
}
npcConfig.speechBubble = SPEECHBUBBLE_BANKER

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

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

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

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

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

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

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

local function creatureSayCallback(npc, creature, type, message)
	local player = Player(creature)
	local playerId = player:getId()

	if not npcHandler:checkInteraction(npc, creature) then
		return false
	end

	if MsgContains(message, "letter") then
		if player:getStorageValue(Storage.Quest.U8_2.TheThievesGuildQuest.Mission06) == 1 then
			npcHandler:say("You would like Chantalle's letter? only if you are willing to pay a price. {gold} maybe?", npc, creature)
			npcHandler:setTopic(playerId, 1)
		end
	elseif MsgContains(message, "gold") then
		if npcHandler:getTopic(playerId) == 1 then
			npcHandler:say("Are you willing to pay 1000 gold for this letter?", npc, creature)
			npcHandler:setTopic(playerId, 2)
		end
	elseif MsgContains(message, "yes") then
		if npcHandler:getTopic(playerId) == 2 then
			if player:removeMoneyBank(1000) then
				player:addItem(7940, 1)
				npcHandler:say("Here you go kind sir.", npc, creature)
				npcHandler:setTopic(playerId, 0)
			end
		end
	end
	return true
end

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

npcConfig.shop = {
	{ itemName = "label", clientId = 3507, buy = 1 },
	{ itemName = "letter", clientId = 3505, buy = 8 },
	{ itemName = "parcel", clientId = 3503, buy = 15 },
}
-- On buy npc shop message
npcType.onBuyItem = function(npc, player, itemId, subType, amount, ignore, inBackpacks, totalCost)
	npc:sellItem(player, itemId, amount, subType, 0, ignore, inBackpacks)
end
-- On sell npc shop message
npcType.onSellItem = function(npc, player, itemId, subtype, amount, ignore, name, totalCost)
	player:sendTextMessage(MESSAGE_TRADE, string.format("Sold %ix %s for %i gold.", amount, name, totalCost))
end
-- On check npc shop message (look item)
npcType.onCheckItem = function(npc, player, clientId, subType) end

npcType:register(npcConfig)
