ERROR NPC INTERFACE

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)

function onCreatureAppear(cid)                npcHandler:onCreatureAppear(cid)             end
function onCreatureDisappear(cid)             npcHandler:onCreatureDisappear(cid)             end
function onCreatureSay(cid, type, msg)             npcHandler:onCreatureSay(cid, type, msg)         end
function onThink()                     npcHandler:onThink()                     end

-- Don't forget npcHandler = npcHandler in the parameters. It is required for all StdModule functions!
keywordHandler:addKeyword({'helmets'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I buy royal (40k), warrior (6k), crusader (9k), crown (5k), devil (4k), chain (35gp) and iron helmets (30gp), also mystic turbans (500gp).'})
keywordHandler:addKeyword({'boots'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I buy golden boots (100k), steel boots (40k) and boots of haste (40k).'})
keywordHandler:addKeyword({'armors'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I buy golden (30k), crown (20k), knight (5k), lady (7,5k), plate (400gp), brass (200gp) and chain armors (100gp), also mpa (100k), dsm (60k) and blue robes (15k).'})
keywordHandler:addKeyword({'legs'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I buy golden (80k), crown (15k), knight (6k), plate (500gp) and brass legs (100gp).'})
keywordHandler:addKeyword({'shields'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I buy blessed (150k), great (100k), demon (40k), vampire (25k), medusa (8k), amazon (4k), crown (5k), tower (4k), dragon (3k), guardian (2k), beholder (1k), and dwarven shields (100gp), also mms (80k).'})
keywordHandler:addKeyword({'swords'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I buy giant (10k), bright (6k), fire (3k) serpent (1.5k), spike (800gp) and two handed swords (400gp), also ice rapiers (4k), magic longswords (150k), magic swords (90k), warlord swords (100k) broad swords (70gp), short swords (30gp), sabres (25gp) and swords (25gp).'})
keywordHandler:addKeyword({'axes'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I buy fire (10k), guardian halberds (7,5k) knight (2k), double (200gp) and battle axes (100gp), also dragon lances (10k), stonecutters axes (90k), halberds (200gp) and hatchets (20gp).'})
keywordHandler:addKeyword({'clubs'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I buy thunder hammers (90k), war (6k), dragon (2k) and battle hammers (60gp), also skull staffs (10k) and clerical maces (200gp).'})

npcHandler:addModule(FocusModule:new())
 

-- configs
pricetobuff = 2000
invisibleseconds = 600
magicshieldseconds = 600
skillsseconds = 600
skillsupgrade = {}
skillsupgrade['fist'] = 20
skillsupgrade['club'] = 20
skillsupgrade['sword'] = 20
skillsupgrade['axe'] = 20
skillsupgrade['distance'] = 20
skillsupgrade['shield'] = 20
skillsupgrade['ml'] = 10
-- end configs

-- invisible combat
local combatInvisible = createCombatObject()
setCombatParam(combatInvisible, COMBAT_PARAM_EFFECT, CONST_ME_MAGIC_RED)
setCombatParam(combatInvisible, COMBAT_PARAM_AGGRESSIVE, 0)
local condition = createConditionObject(CONDITION_INVISIBLE)
setConditionParam(condition, CONDITION_PARAM_TICKS, invisibleseconds*1000)
setCombatCondition(combatInvisible, condition)

-- utamo combat
local combatUtamo = createCombatObject()
setCombatParam(combatUtamo, COMBAT_PARAM_EFFECT, CONST_ME_MAGIC_BLUE)
setCombatParam(combatUtamo, COMBAT_PARAM_AGGRESSIVE, 0)

local condition = createConditionObject(CONDITION_MANASHIELD)
setConditionParam(condition, CONDITION_PARAM_TICKS, magicshieldseconds*1000)
setCombatCondition(combatUtamo, condition)

-- melee condition
local conditionMelee = createConditionObject(CONDITION_ATTRIBUTES)
setConditionParam(conditionMelee, CONDITION_PARAM_TICKS, skillsseconds*1000)
setConditionParam(conditionMelee, CONDITION_PARAM_SKILL_FIST, skillsupgrade['fist'])
setConditionParam(conditionMelee, CONDITION_PARAM_SKILL_CLUB, skillsupgrade['club'])
setConditionParam(conditionMelee, CONDITION_PARAM_SKILL_SWORD, skillsupgrade['sword'])
setConditionParam(conditionMelee, CONDITION_PARAM_SKILL_AXE, skillsupgrade['axe'])

-- distance condition
local conditionDistance = createConditionObject(CONDITION_ATTRIBUTES)
setConditionParam(conditionDistance, CONDITION_PARAM_TICKS, skillsseconds*1000)
setConditionParam(conditionDistance, CONDITION_PARAM_SKILL_DISTANCE, skillsupgrade['distance'])

-- shield condition
local conditionShield = createConditionObject(CONDITION_ATTRIBUTES)
setConditionParam(conditionShield, CONDITION_PARAM_TICKS, skillsseconds*1000)
setConditionParam(conditionShield, CONDITION_PARAM_SKILL_SHIELD, skillsupgrade['shield'])

-- ml condition
local conditionMagic = createConditionObject(CONDITION_ATTRIBUTES)
setConditionParam(conditionMagic, CONDITION_PARAM_TICKS, skillsseconds*1000)
setConditionParam(conditionMagic, CONDITION_PARAM_STAT_MAGICPOINTS, skillsupgrade['ml'])

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)

function onCreatureAppear(cid) npcHandler:onCreatureAppear(cid) end
function onCreatureDisappear(cid) npcHandler:onCreatureDisappear(cid) end
function onCreatureSay(cid, type, msg) npcHandler:onCreatureSay(cid, type, msg) end
function onThink() npcHandler:onThink() end

function buff(cid, message, keywords, parameters, node)
if(not npcHandler:isFocused(cid)) then
return false
end
if doPlayerRemoveMoney(cid, pricetobuff) == TRUE then
buff = parameters.buff
message = parameters.message

doCombat(cid, buff, numberToVariant(cid))
npcHandler:say(message, cid)
keywordHandler:moveUp(1)
return true
else
npcHandler:say("You need ".. pricetobuff .." gold coins to buff yourself.", cid)
end
end

function buffMelee(cid, message, keywords, parameters, node)
if(not npcHandler:isFocused(cid)) then
return false
end
if doPlayerRemoveMoney(cid, pricetobuff) == TRUE then
buff = parameters.buff
errors = 0
message = parameters.message
voc = getPlayerVocation(cid)

if buff == conditionMagic and (isKnight(cid) or isPaladin(cid)) then
npcHandler:say("Only master sorcerers and elder druids can upgrade their magic skills.", cid)
errors = 1
end

if errors == 0 then
doTargetCombatCondition(0, cid, buff, CONST_ME_MAGIC_RED)
npcHandler:say(message, cid)
keywordHandler:moveUp(1)
return true
end
else
npcHandler:say("You need ".. pricetobuff .." gold coins to buff yourself.", cid)
end
end

local node1 = keywordHandler:addKeyword({'invisible'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you want to be invisible?'})
node1:addChildKeyword({'yes'}, buff, {buff = combatInvisible, message = 'Now you are invisible!'})
node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, moveup = 1, text = 'Then not.'})

local node1 = keywordHandler:addKeyword({'magic shield'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you want to get magic shield effect?'})
node1:addChildKeyword({'yes'}, buff, {buff = combatUtamo, message = 'Your magic shield is on!'})
node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, moveup = 1, text = 'Then not.'})

local node1 = keywordHandler:addKeyword({'melee'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you want to upgrade your melee skills for some time?'})
node1:addChildKeyword({'yes'}, buffMelee, {buff = conditionMelee, message = 'Your skills had been upgraded!'})
node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, moveup = 1, text = 'Then not.'})

local node1 = keywordHandler:addKeyword({'shield'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you want to upgrade your shield skills for some time?'})
node1:addChildKeyword({'yes'}, buffMelee, {buff = conditionShield, message = 'Your skills had been upgraded!'})
node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, moveup = 1, text = 'Then not.'})

local node1 = keywordHandler:addKeyword({'distance'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you want to upgrade your distance skills for some time?'})
node1:addChildKeyword({'yes'}, buffMelee, {buff = conditionDistance, message = 'Your skills had been upgraded!'})
node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, moveup = 1, text = 'Then not.'})

local node1 = keywordHandler:addKeyword({'magic'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you want to upgrade your magic skills for some time?'})
node1:addChildKeyword({'yes'}, buffMelee, {buff = conditionMagic, message = 'Your skills had been upgraded!'})
node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, moveup = 1, text = 'Then not.'})

keywordHandler:addKeyword({'offer'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = "Uhm?"})
keywordHandler:addKeyword({'help'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = "Ya?"})

npcHandler:addModule(FocusModule:new())