local focus = 0
local talk_start = 0
local target = 0
local following = false
local attacking = false

function onThingMove(creature, thing, oldpos, oldstackpos)

end


function onCreatureAppear(creature)

end


function onCreatureDisappear(cid, pos)
  	if focus == cid then
          selfSay('Good bye then.')
          focus = 0
          talk_start = 0
  	end
end


function onCreatureTurn(creature)

end


function msgcontains(txt, str)
  	return (string.find(txt, str) and not string.find(txt, '(%w+)' .. str) and not string.find(txt, str .. '(%w+)'))
end


function onCreatureSay(cid, type, msg)
  	msg = string.lower(msg)

  	if (msgcontains(msg, 'hi') and (focus == 0)) and getDistanceToCreature(cid) < 4 then
  		selfSay('Hello ' .. creatureGetName(cid) .. '! I sell crossbows (200gps), bows (100gps), arrows (30gps), bolts (50gps) and spears (20gps).')
  		focus = cid
  		talk_start = os.clock()

  	elseif msgcontains(msg, 'hi') and (focus ~= cid) and getDistanceToCreature(cid) < 4 then
  		selfSay('Sorry, ' .. creatureGetName(cid) .. '! I talk to you in a minute.')

  	elseif focus == cid then
		talk_start = os.clock()

		if msgcontains(msg, 'crossbow') then
			buy(cid,2455,getCount(msg),200)
		elseif msgcontains(msg, 'bow') then
			buy(cid,2456,getCount(msg),100)
		elseif msgcontains(msg, 'arrows') then
			buy(cid,2544,getCount(msg),30)
		elseif msgcontains(msg, 'bolts') then
			buy(cid,2543,getCount(msg),50)
		elseif msgcontains(msg, 'spears') then
			buy(cid,2389,getCount(msg),20)

		elseif msgcontains(msg, 'bye') and focus == cid and getDistanceToCreature(cid) < 4 then
			selfSay('Good bye, ' .. creatureGetName(cid) .. '!')
			focus = 0
			talk_start = 0
		end
	end
end


function onCreatureChangeOutfit(creature)

end


function onThink()
  	if (os.clock() - talk_start) > 30 then
  		if focus > 0 then
  			selfSay('Next Please...')
  		end
  		focus = 0
  	end
 	if focus ~= 0 then
 		if getDistanceToCreature(focus) > 5 then
 			selfSay('Good bye then.')
 			focus = 0
 		end
 	end
end