/* Copyright (C) 2019 Mr Goldberg
   This file is part of the Goldberg Emulator

   The Goldberg Emulator is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.

   The Goldberg Emulator 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the Goldberg Emulator; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef __INCLUDED_STEAM_FRIENDS_H__
#define __INCLUDED_STEAM_FRIENDS_H__

#include "base.h"
#include "overlay/steam_overlay.h"

struct Avatar_Numbers {
    int smallest{};
    int medium{};
    int large{};
};

class Steam_Friends : 
public ISteamFriends003,
public ISteamFriends004,
public ISteamFriends005,
public ISteamFriends006,
public ISteamFriends007,
public ISteamFriends008,
public ISteamFriends009,
public ISteamFriends010,
public ISteamFriends011,
public ISteamFriends012,
public ISteamFriends013,
public ISteamFriends014,
public ISteamFriends015,
public ISteamFriends016,
public ISteamFriends
{
    class Settings *settings{};
    class Local_Storage* local_storage{};
    class Networking *network{};
    class SteamCallBacks *callbacks{};
    class SteamCallResults *callback_results{};
    class RunEveryRunCB *run_every_runcb{};
    class Steam_Overlay* overlay{};

    Friend us{};
    bool modified{};
    std::vector<Friend> friends{};

    std::map<uint64, struct Avatar_Numbers> avatars{};
    CSteamID lobby_id{};

    std::chrono::high_resolution_clock::time_point last_sent_friends{};

    Friend *find_friend(CSteamID id);

    void persona_change(CSteamID id, EPersonaChange flags);

    void rich_presence_updated(CSteamID id, AppId_t appid);

    bool is_appid_compatible(Friend *f);

    struct Avatar_Numbers add_friend_avatars(CSteamID id);

    static bool ok_friend_flags(int iFriendFlags);

    static void steam_friends_callback(void *object, Common_Message *msg);
    static void steam_friends_run_every_runcb(void *object);

    void RunCallbacks();
    void Callback(Common_Message *msg);

public:
    Steam_Friends(Settings* settings, class Local_Storage* local_storage, Networking* network, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Steam_Overlay* overlay);
    ~Steam_Friends();

    void resend_friend_data();

    // returns the local players name - guaranteed to not be NULL.
    // this is the same name as on the users community profile page
    // this is stored in UTF-8 format
    // like all the other interface functions that return a char *, it's important that this pointer is not saved
    // off; it will eventually be free'd or re-allocated
    const char *GetPersonaName();

    // Sets the player name, stores it on the server and publishes the changes to all friends who are online.
    // Changes take place locally immediately, and a PersonaStateChange_t is posted, presuming success.
    //
    // The final results are available through the return value SteamAPICall_t, using SetPersonaNameResponse_t.
    //
    // If the name change fails to happen on the server, then an additional global PersonaStateChange_t will be posted
    // to change the name back, in addition to the SetPersonaNameResponse_t callback.
    STEAM_CALL_RESULT( SetPersonaNameResponse_t )
    SteamAPICall_t SetPersonaName( const char *pchPersonaName );

    void SetPersonaName_old( const char *pchPersonaName );

    // gets the status of the current user
    EPersonaState GetPersonaState();


    // friend iteration
    // takes a set of k_EFriendFlags, and returns the number of users the client knows about who meet that criteria
    // then GetFriendByIndex() can then be used to return the id's of each of those users
    int GetFriendCount( int iFriendFlags );

    int GetFriendCount( EFriendFlags eFriendFlags );

    // returns the steamID of a user
    // iFriend is a index of range [0, GetFriendCount())
    // iFriendsFlags must be the same value as used in GetFriendCount()
    // the returned CSteamID can then be used by all the functions below to access details about the user
    CSteamID GetFriendByIndex( int iFriend, int iFriendFlags );

    void GetFriendByIndex(CSteamID& res, int iFriend, int iFriendFlags );

    CSteamID GetFriendByIndex( int iFriend, EFriendFlags eFriendFlags );

    void GetFriendByIndex(CSteamID& result, int iFriend, EFriendFlags eFriendFlags);

    // returns a relationship to a user
    EFriendRelationship GetFriendRelationship( CSteamID steamIDFriend );


    // returns the current status of the specified user
    // this will only be known by the local user if steamIDFriend is in their friends list; on the same game server; in a chat room or lobby; or in a small group with the local user
    EPersonaState GetFriendPersonaState( CSteamID steamIDFriend );


    // returns the name another user - guaranteed to not be NULL.
    // same rules as GetFriendPersonaState() apply as to whether or not the user knowns the name of the other user
    // note that on first joining a lobby, chat room or game server the local user will not known the name of the other users automatically; that information will arrive asyncronously
    // 
    const char *GetFriendPersonaName( CSteamID steamIDFriend );


    // returns true if the friend is actually in a game, and fills in pFriendGameInfo with an extra details 
    bool GetFriendGamePlayed( CSteamID steamIDFriend, STEAM_OUT_STRUCT() FriendGameInfo_t *pFriendGameInfo );

    bool GetFriendGamePlayed( CSteamID steamIDFriend, uint64 *pulGameID, uint32 *punGameIP, uint16 *pusGamePort, uint16 *pusQueryPort );

    // accesses old friends names - returns an empty string when their are no more items in the history
    const char *GetFriendPersonaNameHistory( CSteamID steamIDFriend, int iPersonaName );

    // friends steam level
    int GetFriendSteamLevel( CSteamID steamIDFriend );


    // Returns nickname the current user has set for the specified player. Returns NULL if the no nickname has been set for that player.
    const char *GetPlayerNickname( CSteamID steamIDPlayer );


    // friend grouping (tag) apis
    // returns the number of friends groups
    int GetFriendsGroupCount();

    // returns the friends group ID for the given index (invalid indices return k_FriendsGroupID_Invalid)
    FriendsGroupID_t GetFriendsGroupIDByIndex( int iFG );

    // returns the name for the given friends group (NULL in the case of invalid friends group IDs)
    const char *GetFriendsGroupName( FriendsGroupID_t friendsGroupID );

    // returns the number of members in a given friends group
    int GetFriendsGroupMembersCount( FriendsGroupID_t friendsGroupID );

    // gets up to nMembersCount members of the given friends group, if fewer exist than requested those positions' SteamIDs will be invalid
    void GetFriendsGroupMembersList( FriendsGroupID_t friendsGroupID, STEAM_OUT_ARRAY_CALL(nMembersCount, GetFriendsGroupMembersCount, friendsGroupID ) CSteamID *pOutSteamIDMembers, int nMembersCount );


    // returns true if the specified user meets any of the criteria specified in iFriendFlags
    // iFriendFlags can be the union (binary or, |) of one or more k_EFriendFlags values
    bool HasFriend( CSteamID steamIDFriend, int iFriendFlags );

    bool HasFriend( CSteamID steamIDFriend, EFriendFlags eFriendFlags );

    // clan (group) iteration and access functions
    int GetClanCount();

    CSteamID GetClanByIndex( int iClan );

    void GetClanByIndex(CSteamID& result, int iClan );

    const char *GetClanName( CSteamID steamIDClan );

    const char *GetClanTag( CSteamID steamIDClan );

    // returns the most recent information we have about what's happening in a clan
    bool GetClanActivityCounts( CSteamID steamIDClan, int *pnOnline, int *pnInGame, int *pnChatting );

    // for clans a user is a member of, they will have reasonably up-to-date information, but for others you'll have to download the info to have the latest
    SteamAPICall_t DownloadClanActivityCounts( STEAM_ARRAY_COUNT(cClansToRequest) CSteamID *psteamIDClans, int cClansToRequest );


    // iterators for getting users in a chat room, lobby, game server or clan
    // note that large clans that cannot be iterated by the local user
    // note that the current user must be in a lobby to retrieve CSteamIDs of other users in that lobby
    // steamIDSource can be the steamID of a group, game server, lobby or chat room
    int GetFriendCountFromSource( CSteamID steamIDSource );

    CSteamID GetFriendFromSourceByIndex( CSteamID steamIDSource, int iFriend );

    void GetFriendFromSourceByIndex(CSteamID& res, CSteamID steamIDSource, int iFriend);


    // returns true if the local user can see that steamIDUser is a member or in steamIDSource
    bool IsUserInSource( CSteamID steamIDUser, CSteamID steamIDSource );


    // User is in a game pressing the talk button (will suppress the microphone for all voice comms from the Steam friends UI)
    void SetInGameVoiceSpeaking( CSteamID steamIDUser, bool bSpeaking );


    // activates the game overlay, with an optional dialog to open 
    // valid options are "Friends", "Community", "Players", "Settings", "OfficialGameGroup", "Stats", "Achievements"
    void ActivateGameOverlay( const char *pchDialog );


    // activates game overlay to a specific place
    // valid options are
    //		"steamid" - opens the overlay web browser to the specified user or groups profile
    //		"chat" - opens a chat window to the specified user, or joins the group chat 
    //		"jointrade" - opens a window to a Steam Trading session that was started with the ISteamEconomy/StartTrade Web API
    //		"stats" - opens the overlay web browser to the specified user's stats
    //		"achievements" - opens the overlay web browser to the specified user's achievements
    //		"friendadd" - opens the overlay in minimal mode prompting the user to add the target user as a friend
    //		"friendremove" - opens the overlay in minimal mode prompting the user to remove the target friend
    //		"friendrequestaccept" - opens the overlay in minimal mode prompting the user to accept an incoming friend invite
    //		"friendrequestignore" - opens the overlay in minimal mode prompting the user to ignore an incoming friend invite
    void ActivateGameOverlayToUser( const char *pchDialog, CSteamID steamID );


    // activates game overlay web browser directly to the specified URL
    // full address with protocol type is required, e.g. http://www.steamgames.com/
    void ActivateGameOverlayToWebPage( const char *pchURL, EActivateGameOverlayToWebPageMode eMode = k_EActivateGameOverlayToWebPageMode_Default );

    void ActivateGameOverlayToWebPage( const char *pchURL );

    // activates game overlay to store page for app
    void ActivateGameOverlayToStore( AppId_t nAppID, EOverlayToStoreFlag eFlag );

    void ActivateGameOverlayToStore( AppId_t nAppID);

    // Mark a target user as 'played with'. This is a client-side only feature that requires that the calling user is 
    // in game 
    void SetPlayedWith( CSteamID steamIDUserPlayedWith );


    // activates game overlay to open the invite dialog. Invitations will be sent for the provided lobby.
    void ActivateGameOverlayInviteDialog( CSteamID steamIDLobby );

    // gets the small (32x32) avatar of the current user, which is a handle to be used in IClientUtils::GetImageRGBA(), or 0 if none set
    int GetSmallFriendAvatar( CSteamID steamIDFriend );


    // gets the medium (64x64) avatar of the current user, which is a handle to be used in IClientUtils::GetImageRGBA(), or 0 if none set
    int GetMediumFriendAvatar( CSteamID steamIDFriend );


    // gets the large (184x184) avatar of the current user, which is a handle to be used in IClientUtils::GetImageRGBA(), or 0 if none set
    // returns -1 if this image has yet to be loaded, in this case wait for a AvatarImageLoaded_t callback and then call this again
    int GetLargeFriendAvatar( CSteamID steamIDFriend );

    int GetFriendAvatar( CSteamID steamIDFriend, int eAvatarSize );

    int GetFriendAvatar(CSteamID steamIDFriend);

    // requests information about a user - persona name & avatar
    // if bRequireNameOnly is set, then the avatar of a user isn't downloaded 
    // - it's a lot slower to download avatars and churns the local cache, so if you don't need avatars, don't request them
    // if returns true, it means that data is being requested, and a PersonaStateChanged_t callback will be posted when it's retrieved
    // if returns false, it means that we already have all the details about that user, and functions can be called immediately
    bool RequestUserInformation( CSteamID steamIDUser, bool bRequireNameOnly );


    // requests information about a clan officer list
    // when complete, data is returned in ClanOfficerListResponse_t call result
    // this makes available the calls below
    // you can only ask about clans that a user is a member of
    // note that this won't download avatars automatically; if you get an officer,
    // and no avatar image is available, call RequestUserInformation( steamID, false ) to download the avatar
    STEAM_CALL_RESULT( ClanOfficerListResponse_t )
    SteamAPICall_t RequestClanOfficerList( CSteamID steamIDClan );


    // iteration of clan officers - can only be done when a RequestClanOfficerList() call has completed

    // returns the steamID of the clan owner
    CSteamID GetClanOwner( CSteamID steamIDClan );

    void GetClanOwner(CSteamID& res, CSteamID steamIDClan );

    // returns the number of officers in a clan (including the owner)
    int GetClanOfficerCount( CSteamID steamIDClan );

    // returns the steamID of a clan officer, by index, of range [0,GetClanOfficerCount)
    CSteamID GetClanOfficerByIndex( CSteamID steamIDClan, int iOfficer );

    void GetClanOfficerByIndex(CSteamID& res, CSteamID steamIDClan, int iOfficer );

    // if current user is chat restricted, he can't send or receive any text/voice chat messages.
    // the user can't see custom avatars. But the user can be online and send/recv game invites.
    // a chat restricted user can't add friends or join any groups.
    uint32 GetUserRestrictions();

    EUserRestriction GetUserRestrictions_old();

    // Rich Presence data is automatically shared between friends who are in the same game
    // Each user has a set of Key/Value pairs
    // Note the following limits: k_cchMaxRichPresenceKeys, k_cchMaxRichPresenceKeyLength, k_cchMaxRichPresenceValueLength
    // There are two magic keys:
    //		"status"  - a UTF-8 string that will show up in the 'view game info' dialog in the Steam friends list
    //		"connect" - a UTF-8 string that contains the command-line for how a friend can connect to a game
    // GetFriendRichPresence() returns an empty string "" if no value is set
    // SetRichPresence() to a NULL or an empty string deletes the key
    // You can iterate the current set of keys for a friend with GetFriendRichPresenceKeyCount()
    // and GetFriendRichPresenceKeyByIndex() (typically only used for debugging)
    bool SetRichPresence( const char *pchKey, const char *pchValue );

    void ClearRichPresence();

    // the overlay will keep calling GetFriendRichPresence() and spam the debug log, hence this function
    const char *get_friend_rich_presence_silent( CSteamID steamIDFriend, const char *pchKey );

    const char *GetFriendRichPresence( CSteamID steamIDFriend, const char *pchKey );

    int GetFriendRichPresenceKeyCount( CSteamID steamIDFriend );

    const char *GetFriendRichPresenceKeyByIndex( CSteamID steamIDFriend, int iKey );

    // Requests rich presence for a specific user.
    void RequestFriendRichPresence( CSteamID steamIDFriend );


    // rich invite support
    // if the target accepts the invite, the pchConnectString gets added to the command-line for launching the game
    // if the game is already running, a GameRichPresenceJoinRequested_t callback is posted containing the connect string
    // invites can only be sent to friends
    bool InviteUserToGame( CSteamID steamIDFriend, const char *pchConnectString );


    // recently-played-with friends iteration
    // this iterates the entire list of users recently played with, across games
    // GetFriendCoplayTime() returns as a unix time
    int GetCoplayFriendCount();

    CSteamID GetCoplayFriend( int iCoplayFriend );
    
    void GetCoplayFriend(CSteamID& res, int iCoplayFriend );

    int GetFriendCoplayTime( CSteamID steamIDFriend );

    AppId_t GetFriendCoplayGame( CSteamID steamIDFriend );


    // chat interface for games
    // this allows in-game access to group (clan) chats from in the game
    // the behavior is somewhat sophisticated, because the user may or may not be already in the group chat from outside the game or in the overlay
    // use ActivateGameOverlayToUser( "chat", steamIDClan ) to open the in-game overlay version of the chat
    STEAM_CALL_RESULT( JoinClanChatRoomCompletionResult_t )
    SteamAPICall_t JoinClanChatRoom( CSteamID steamIDClan );

    bool LeaveClanChatRoom( CSteamID steamIDClan );

    int GetClanChatMemberCount( CSteamID steamIDClan );

    CSteamID GetChatMemberByIndex( CSteamID steamIDClan, int iUser );
    
    void GetChatMemberByIndex(CSteamID& res, CSteamID steamIDClan, int iUser );

    bool SendClanChatMessage( CSteamID steamIDClanChat, const char *pchText );

    int GetClanChatMessage( CSteamID steamIDClanChat, int iMessage, void *prgchText, int cchTextMax, EChatEntryType *peChatEntryType, STEAM_OUT_STRUCT() CSteamID *psteamidChatter );

    bool IsClanChatAdmin( CSteamID steamIDClanChat, CSteamID steamIDUser );


    // interact with the Steam (game overlay / desktop)
    bool IsClanChatWindowOpenInSteam( CSteamID steamIDClanChat );

    bool OpenClanChatWindowInSteam( CSteamID steamIDClanChat );

    bool CloseClanChatWindowInSteam( CSteamID steamIDClanChat );


    // peer-to-peer chat interception
    // this is so you can show P2P chats inline in the game
    bool SetListenForFriendsMessages( bool bInterceptEnabled );

    bool ReplyToFriendMessage( CSteamID steamIDFriend, const char *pchMsgToSend );

    int GetFriendMessage( CSteamID steamIDFriend, int iMessageID, void *pvData, int cubData, EChatEntryType *peChatEntryType );


    // following apis
    STEAM_CALL_RESULT( FriendsGetFollowerCount_t )
    SteamAPICall_t GetFollowerCount( CSteamID steamID );

    STEAM_CALL_RESULT( FriendsIsFollowing_t )
    SteamAPICall_t IsFollowing( CSteamID steamID );

    STEAM_CALL_RESULT( FriendsEnumerateFollowingList_t )
    SteamAPICall_t EnumerateFollowingList( uint32 unStartIndex );


    bool IsClanPublic( CSteamID steamIDClan );

    bool IsClanOfficialGameGroup( CSteamID steamIDClan );

    int GetNumChatsWithUnreadPriorityMessages();

    void ActivateGameOverlayRemotePlayTogetherInviteDialog( CSteamID steamIDLobby );

    // Call this before calling ActivateGameOverlayToWebPage() to have the Steam Overlay Browser block navigations
    // to your specified protocol (scheme) uris and instead dispatch a OverlayBrowserProtocolNavigation_t callback to your game.
    // ActivateGameOverlayToWebPage() must have been called with k_EActivateGameOverlayToWebPageMode_Modal
    bool RegisterProtocolInOverlayBrowser( const char *pchProtocol );

    // Activates the game overlay to open an invite dialog that will send the provided Rich Presence connect string to selected friends
    void ActivateGameOverlayInviteDialogConnectString( const char *pchConnectString );

    // Steam Community items equipped by a user on their profile
    // You can register for EquippedProfileItemsChanged_t to know when a friend has changed their equipped profile items
    STEAM_CALL_RESULT( EquippedProfileItems_t )
    SteamAPICall_t RequestEquippedProfileItems( CSteamID steamID );

    bool BHasEquippedProfileItem( CSteamID steamID, ECommunityProfileItemType itemType );

    const char *GetProfileItemPropertyString( CSteamID steamID, ECommunityProfileItemType itemType, ECommunityProfileItemProperty prop );

    uint32 GetProfileItemPropertyUint( CSteamID steamID, ECommunityProfileItemType itemType, ECommunityProfileItemProperty prop );

};

#endif //__INCLUDED_STEAM_FRIENDS_H__