/*
 * Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/**
 * @addtogroup mailing The mail system
 * The mailing system in MaNGOS consists of mostly two files:
 * - Mail.h
 * - Mail.cpp
 *
 * @{
 *
 * @file Mail.h
 * This file contains the the headers needed for MaNGOS to handle mails.
 *
 */

#ifndef MANGOS_MAIL_H
#define MANGOS_MAIL_H

#include "Common.h"
#include <map>

struct AuctionEntry;
class Item;
class Object;
class Player;

#define MAIL_BODY_ITEM_TEMPLATE 8383                        ///< - plain letter, A Dusty Unsent Letter: 889
/// The maximal amount of items a mail can contain.
#define MAX_MAIL_ITEMS 12
/**
 * The type of the mail.
 * A mail can have 5 Different Types.
 */
enum MailMessageType
{
    MAIL_NORMAL         = 0,
    MAIL_AUCTION        = 2,
    MAIL_CREATURE       = 3,                                /// client send CMSG_CREATURE_QUERY on this mailmessagetype
    MAIL_GAMEOBJECT     = 4,                                /// client send CMSG_GAMEOBJECT_QUERY on this mailmessagetype
    MAIL_ITEM           = 5,                                /// client send CMSG_ITEM_QUERY on this mailmessagetype
};
/**
 * A Mask representing the status of the mail.
 */
enum MailCheckMask
{
    MAIL_CHECK_MASK_NONE        = 0x00,                     /// Nothing.
    MAIL_CHECK_MASK_READ        = 0x01,                     /// This mail was read.
    MAIL_CHECK_MASK_RETURNED    = 0x02,                     /// This mail was returned. No allow return mail.
    MAIL_CHECK_MASK_COPIED      = 0x04,                     /// This mail was copied. No allow make item copy from mail text.
    MAIL_CHECK_MASK_COD_PAYMENT = 0x08,                     /// This mail is payable on delivery.
    MAIL_CHECK_MASK_HAS_BODY    = 0x10,                     /// This mail has body text.
};

/**
 * The different types of Stationaries that exist for mails.
 * They have been gathered from Stationery.dbc
 */
enum MailStationery
{
    MAIL_STATIONERY_TEST    = 1,
    MAIL_STATIONERY_DEFAULT = 41,
    MAIL_STATIONERY_GM      = 61,
    MAIL_STATIONERY_AUCTION = 62,
    MAIL_STATIONERY_VAL     = 64,
    MAIL_STATIONERY_CHR     = 65,
    MAIL_STATIONERY_ORP     = 67,                           // new in 3.2.2
};
/**
 * Representation of the State of a mail.
 */
enum MailState
{
    MAIL_STATE_UNCHANGED = 1,
    MAIL_STATE_CHANGED   = 2,
    MAIL_STATE_DELETED   = 3
};
/**
 * Answers contained in mails from auctionhouses.
 */
enum MailAuctionAnswers
{
    AUCTION_OUTBIDDED           = 0,
    AUCTION_WON                 = 1,
    AUCTION_SUCCESSFUL          = 2,
    AUCTION_EXPIRED             = 3,
    AUCTION_CANCELLED_TO_BIDDER = 4,
    AUCTION_CANCELED            = 5,
    AUCTION_SALE_PENDING        = 6
};
/**
 * A class to represent the sender of a mail.
 */
class MailSender
{
    public:                                                 // Constructors
       /**
        * Creates a new MailSender object.
        *
        * @param messageType the type of the mail.
        * @param sender_guidlow_or_entry The lower part of the GUID of the player sending
        *                                                                this mail, or the Entry of the non-player object.
        * @param stationery The stationary associated with this MailSender.
        *
        */
        MailSender(MailMessageType messageType, uint32 sender_guidlow_or_entry, MailStationery stationery = MAIL_STATIONERY_DEFAULT)
            : m_messageType(messageType), m_senderId(sender_guidlow_or_entry), m_stationery(stationery)
        {
        }
        MailSender(Object* sender, MailStationery stationery = MAIL_STATIONERY_DEFAULT);
        MailSender(AuctionEntry* sender);
    public:                                                 // Accessors
        /// The Messagetype of this MailSender.
        MailMessageType GetMailMessageType() const { return m_messageType; }
        /// The GUID of the player represented by this MailSender, or the Entry of the non-player object.
        uint32 GetSenderId() const { return m_senderId; }
        /// The stationary associated with this MailSender
        MailStationery GetStationery() const { return m_stationery; }
    private:
        MailMessageType m_messageType;
        uint32 m_senderId;                                  // player low guid or other object entry
        MailStationery m_stationery;
};
/**
 * A class to represent the receiver of a mail.
 */
class MailReceiver
{
    public:                                                 // Constructors
        explicit MailReceiver(uint32 receiver_lowguid) : m_receiver(NULL), m_receiver_lowguid(receiver_lowguid) {}
        MailReceiver(Player* receiver);
        MailReceiver(Player* receiver,uint32 receiver_lowguid);
    public:                                                 // Accessors
        /**
         * Gets the player associated with this MailReciever
         *
         * @see Player
         *
         * @returns a pointer to the Player this mail is for.
         *
         */
        Player* GetPlayer() const { return m_receiver; }
        /**
         * Gets the low part of the recievers GUID.
         *
         * @returns the low part of the GUID of the player associated with this MailReciever
         */
        uint32  GetPlayerGUIDLow() const { return m_receiver_lowguid; }
    private:
        Player* m_receiver;
        uint32  m_receiver_lowguid;
};
/**
 * The class to represent the draft of a mail.
 */
class MailDraft
{
        /**
         * Holds a Map of GUIDs of items and pointers to the items.
         */
        typedef std::map<uint32, Item*> MailItemMap;

    public:                                                 // Constructors
       /**
        * Creates a new MailDraft object using mail template id.
        *
        * @param mailTemplateId The ID of the Template to be used.
        * @param a boolean specifying whether the mail needs items or not.
        *
        */
        explicit MailDraft(uint16 mailTemplateId, bool need_items = true)
            : m_mailTemplateId(mailTemplateId), m_mailTemplateItemsNeed(need_items), m_money(0), m_COD(0)
        {}
        /**
         * Creates a new MailDraft object using subject and content texts.
         *
         * @param subject The subject of the mail.
         * @param itemText The text of the body of the mail.
         */
        MailDraft(std::string subject, std::string body)
            : m_mailTemplateId(0), m_mailTemplateItemsNeed(false), m_subject(subject), m_body(body), m_money(0), m_COD(0) {}
    public:                                                 // Accessors
        /// Returns the template ID used for this MailDraft.
        uint16 GetMailTemplateId() const { return m_mailTemplateId; }
        /// Returns the subject of this MailDraft.
        std::string const& GetSubject() const { return m_subject; }
        /// Returns the subject of this MailDraft.
        std::string const& GetBody() const { return m_body; }
        /// Returns the amount of money in this MailDraft.
        uint32 GetMoney() const { return m_money; }
        /// Returns the Cost of delivery of this MailDraft.
        uint32 GetCOD() const { return m_COD; }
    public:                                                 // modifiers
        MailDraft& AddItem(Item* item);
        /**
         * Modifies the amount of money in a MailDraft.
         *
         * @param money The amount of money included in this MailDraft.
         */
        MailDraft& AddMoney(uint32 money) { m_money = money; return *this; }
        /**
         * Modifies the cost of delivery of the MailDraft.
         *
         * @param COD the amount to which the cod should be set.
         */
        MailDraft& AddCOD(uint32 COD) { m_COD = COD; return *this; }
    public:                                                 // finishers
        void SendReturnToSender(uint32 sender_acc, uint32 sender_guid, uint32 receiver_guid);
        void SendMailTo(MailReceiver const& receiver, MailSender const& sender, MailCheckMask checked = MAIL_CHECK_MASK_NONE, uint32 deliver_delay = 0);
    private:
        void deleteIncludedItems(bool inDB = false);
        void prepareItems(Player* receiver);                ///< called from SendMailTo for generate mailTemplateBase items

        /// The ID of the template associated with this MailDraft.
        uint16      m_mailTemplateId;
        /// Boolean specifying whether items are required or not.
        bool        m_mailTemplateItemsNeed;
        /// The subject of the MailDraft.
        std::string m_subject;
        /// The body of the MailDraft.
        std::string m_body;
        /// A map of items in this MailDraft.
        MailItemMap m_items;                                ///< Keep the items in a map to avoid duplicate guids (which can happen), store only low part of guid

        /// The amount of money in this MailDraft.
        uint32 m_money;
        /// The cod amount of this MailDraft.
        uint32 m_COD;
};
/**
 * Structure holding information about an item in the mail.
 */
struct MailItemInfo
{
    uint32 item_guid;                                       ///< the GUID of the item.
    uint32 item_template;                                   ///< the ID of the template of the item.
};
/**
 * Structure that holds an actual mail.
 */
struct Mail
{
    /// the ID of the message contained in the mail.
    uint32 messageID;
    /// the type of the message
    uint8 messageType;
    /// the stationary used in this mail.
    uint8 stationery;
    /// the ID of the template this mail is based on.
    uint16 mailTemplateId;
    /// the GUID of the player that sent this mail.
    uint32 sender;
    /// the GUID of the player that this mail is sent to.
    uint32 receiver;
    /// the subject of the mail
    std::string subject;
    /// the body of the mail
    std::string body;
    /// A vector containing Information about the items in this mail.
    std::vector<MailItemInfo> items;
    /// A vector containing Information about the items that where already take from this mail.
    std::vector<uint32> removedItems;
    /// The time at which this mail will expire
    time_t expire_time;
    /// The time at which this mail (was/will be) delivered
    time_t deliver_time;
    /// The amount of money contained in this mail.
    uint32 money;
    /// The amount of money the receiver has to pay to get this mail.
    uint32 COD;
    /// The time at which this mail was read.
    uint32 checked;
    /// The state of this mail.
    MailState state;

    /**
     * Adds an item to the mail.
     * This method adds an item to mail represented by this structure.
     * There is no checking done whether this is a legal action or not; it is up
     * to the caller to make sure there is still room for more items in the mail.
     *
     * @param itemGuidLow      the GUID(low) of the item added to the mail.
     * @param item_template the ID of the template of the item.
     *
     */
    void AddItem(uint32 itemGuidLow, uint32 item_template)
    {
        MailItemInfo mii;
        mii.item_guid = itemGuidLow;
        mii.item_template = item_template;
        items.push_back(mii);
    }

    /**
     * Removes an item from the mail.
     * This method removes an item from the mail.
     *
     * @see MailItemInfo
     *
     * @param item_guid        The GUID of the item to be removed.
     * @returns true if the item was removed, or false if no item with that GUID was found.
     *
     */
    bool RemoveItem(uint32 item_guid)
    {
        for(std::vector<MailItemInfo>::iterator itr = items.begin(); itr != items.end(); ++itr)
        {
            if(itr->item_guid == item_guid)
            {
                items.erase(itr);
                return true;
            }
        }
        return false;
    }

    /*
     * Checks whether a mail contains items or not.
     * HasItems() checks whether the mail contains items or not.
     *
     * @returns true if the mail contains items, false otherwise.
     *
     */
    bool HasItems() const { return !items.empty(); }
};

#endif
/*! @} */