local npcid = 90000 -- Entry ID of the XP Vendor
local SpawnCommand = "$xp npc spawn"
local TimeNPC = 30 -- In seconds!

local DontModify = TimeNPC * 600 -- Just don't do it!

function SpawnCommand_OnChat(event, player, message, type, language)
    local Mess = message:lower()
     if (Mess:find(SpawnCommand) == 1) then
      if (player:GetPlayerLevel() == 80) then
       player:SendBroadcastMessage("You are already level 80!")
       return 0
      else
       player:SpawnCreature(npcid, player:GetX(), player:GetY(), player:GetZ(), player:GetO(), 35, DontModify, player:GetPhase())
       player:SendBroadcastMessage("You have succesfully spawned XP Npc for: "..TimeNPC.." seconds!")
       return 0
      end
     end
end

RegisterServerHook(16, "SpawnCommand_OnChat")

function XPGossip(Unit, event, player)
    if (player:GetPlayerLevel() == 80) then
     Unit:SendChatMessageToPlayer(15, 0, "You are already level 80!", player) -- Unit will send an Whisper to Player. Only Player can see that.
     player:GossipComplete()
    else
    Unit:GossipCreateMenu(100, player, 0)
    Unit:GossipMenuAddItem(9, "1,000 XP [1 gold]", 1, 0)
    Unit:GossipMenuAddItem(9, "10,000 XP [10 gold]", 2, 0)
    Unit:GossipMenuAddItem(9, "100,000 XP [100 gold]", 3, 0)
    Unit:GossipMenuAddItem(9, "500,000 XP [500 gold]", 4, 0)
    Unit:GossipMenuAddItem(9, "1,000,000 XP [1000 gold]", 5, 0)
    Unit:GossipMenuAddItem(9, "5,000,000 XP [5000 gold]", 6, 0)
    Unit:GossipMenuAddItem(9, "Nevermind", 999, 0)
    Unit:GossipSendMenu(player)
    end
end

function XPGossip_OnSelect(Unit, event, player, code, intid, id)
    if(intid == 998) then -- Back to main menu
     Unit:GossipCreateMenu(100, player, 0)
     Unit:GossipMenuAddItem(9, "1,000 XP [1 gold]", 1, 0)
     Unit:GossipMenuAddItem(9, "10,000 XP [10 gold]", 2, 0)
     Unit:GossipMenuAddItem(9, "100,000 XP [100 gold]", 3, 0)
     Unit:GossipMenuAddItem(9, "500,000 XP [500 gold]", 4, 0)
     Unit:GossipMenuAddItem(9, "1,000,000 XP [1000 gold]", 5, 0)
     Unit:GossipMenuAddItem(9, "5,000,000 XP [5000 gold]", 6, 0)
     Unit:GossipMenuAddItem(9, "Nevermind", 999, 0)
     Unit:GossipSendMenu(player)
    end
       
    if(intid == 999) then -- Closing Gossip Menu
     Unit:SendChatMessage(14, 0, "Come back soon now, ya hear?")
     player:GossipComplete()
    end
       
    if(intid == 1) then -- Buying 1,000 XP For 1 gold
     if(player:GetCoinage() <= 10000) then
      Unit:SendChatMessage(14, 0, "You can't afford this.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     else
     player:DealGoldCost(10000) -- Taking 1 Gold
     player:GiveXp(1000) -- Giving 1,000 XP
     Unit:SendChatMessage(14, 0, "You have bought 1,000 XP for 1 gold.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
    end
     end
       
    if(intid == 2) then -- Buying 10,000 XP for 10 gold
     if(player:GetCoinage() <= 100000) then
      Unit:SendChatMessage(14, 0, "You can't afford this.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     else
     player:DealGoldCost(100000)
     player:GiveXp(10000)
     Unit:SendChatMessage(14, 0, "You have bought 10,000 XP for 10 gold.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
    end
     end
       
    if(intid == 3) then -- Buying 100,000 XP for 100 gold
     if(player:GetCoinage() <= 1000000) then
      Unit:SendChatMessage(14, 0, "You can't afford this.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     else
     player:DealGoldCost(1000000)
     player:GiveXp(100000)
     Unit:SendChatMessage(14, 0, "You have bought 100,000 XP for 100 gold.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     end
    end
       
    if(intid == 4) then -- Buying 500,000 XP for 500 gold
     if(player:GetCoinage() <= 5000000) then
      Unit:SendChatMessage(14, 0, "You can't afford this.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     else
     player:DealGoldCost(5000000)
     player:GiveXp(500000)
     Unit:SendChatMessage(14, 0, "You have bought 500,000 XP for 500 gold.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     end
    end
       
    if(intid == 5) then -- Buying 1,000,000 XP for 1,000 gold
     if(player:GetCoinage() <= 100000000) then
      Unit:SendChatMessage(14, 0, "You can't afford this.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     else
     player:DealGoldCost(100000000)
     player:GiveXp(1000000)
     Unit:SendChatMessage(14, 0, "You have bought 1,000,000 XP for 1000 gold.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     end
    end
       
    if(intid == 6) then -- Buying 5,000,000 XP for 5,000 gold
     if(player:GetCoinage() <= 50000000) then
      Unit:SendChatMessage(14, 0, "You can't afford this.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     else
     player:DealGoldCost(50000000)
     player:GiveXp(5000000)
     Unit:SendChatMessage(14, 0, "You have bought 5,000,000 XP for 5000 gold.")
      Unit:GossipCreateMenu(100, player, 0)
      Unit:GossipMenuAddItem(9, "[Back]", 998, 0)
      Unit:GossipSendMenu(player)
     end
    end
end
RegisterUnitGossipEvent(npcid, 1, "XPGossip")
RegisterUnitGossipEvent(npcid, 2, "XPGossip_OnSelect")