/*
 * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
 */

#include "SellAction.h"
#include "Event.h"
#include "ItemVisitors.h"
#include "ItemUsageValue.h"
#include "Playerbots.h"

class SellItemsVisitor : public IterateItemsVisitor
{
    public:
        SellItemsVisitor(SellAction* action) : IterateItemsVisitor(), action(action) { }

        bool Visit(Item* item) override
        {
            action->Sell(item);
            return true;
        }

    private:
        SellAction* action;
};

class SellGrayItemsVisitor : public SellItemsVisitor
{
    public:
        SellGrayItemsVisitor(SellAction* action) : SellItemsVisitor(action) { }

        bool Visit(Item* item) override
        {
            if (item->GetTemplate()->Quality != ITEM_QUALITY_POOR)
                return true;

            return SellItemsVisitor::Visit(item);
        }
};

class SellVendorItemsVisitor : public SellItemsVisitor
{
    public:
        SellVendorItemsVisitor(SellAction* action, AiObjectContext* con) : SellItemsVisitor(action)
        {
            context = con;
        }

        AiObjectContext* context;

        bool Visit(Item* item) override
        {
            ItemUsage usage = context->GetValue<ItemUsage>("item usage", item->GetEntry())->Get();
            if (usage != ITEM_USAGE_VENDOR && usage != ITEM_USAGE_AH)
                return true;

            return SellItemsVisitor::Visit(item);
        }
};

bool SellAction::Execute(Event event)
{
    std::string const text = event.getParam();
    if (text == "gray" || text == "*")
    {
        SellGrayItemsVisitor visitor(this);
        IterateItems(&visitor);
        return true;
    }

    if (text == "vendor")
    {
        SellVendorItemsVisitor visitor(this, context);
        IterateItems(&visitor);
        return true;
    }

    if (text != "")
    {
        std::vector<Item *> items = parseItems(text, ITERATE_ITEMS_IN_BAGS);
        for (Item *item : items)
        {
            Sell(item);
        }
        return true;
    }

    botAI->TellError("Usage: s gray/*/vendor/[item link]");
    return false;
}

void SellAction::Sell(FindItemVisitor* visitor)
{
    IterateItems(visitor);
    std::vector<Item*> items = visitor->GetResult();
    for (Item* item : items)
    {
        Sell(item);
    }
}

void SellAction::Sell(Item* item)
{
    std::ostringstream out;

    GuidVector vendors = botAI->GetAiObjectContext()->GetValue<GuidVector>("nearest npcs")->Get();

    for (ObjectGuid const vendorguid : vendors)
    {
        Creature* pCreature = bot->GetNPCIfCanInteractWith(vendorguid,UNIT_NPC_FLAG_VENDOR);
        if (!pCreature)
            continue;

        ObjectGuid itemguid = item->GetGUID();
        uint32 count = item->GetCount();

        uint32 botMoney = bot->GetMoney();

        WorldPacket p;
        p << vendorguid << itemguid << count;
        bot->GetSession()->HandleSellItemOpcode(p);

        if (botAI->HasCheat(BotCheatMask::gold))
        {
            bot->SetMoney(botMoney);
        }

        out << "Selling " << chat->FormatItem(item->GetTemplate());
        botAI->TellMaster(out);

        bot->PlayDistanceSound(120);
        break;
    }
}