/* 
    This file is part of tgl-library

    This library 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 2.1 of the License, or (at your option) any later version.

    This library 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 this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

    Copyright Vitaly Valtman 2014
*/
#ifndef __TGL_LAYOUT_H__
#define __TGL_LAYOUT_H__

#define FLAG_MESSAGE_EMPTY 1
#define FLAG_DELETED 2
#define FLAG_FORBIDDEN 4
#define FLAG_HAS_PHOTO 8
#define FLAG_CREATED 16

#define FLAG_USER_SELF 128
#define FLAG_USER_FOREIGN 256
#define FLAG_USER_CONTACT 512
#define FLAG_USER_IN_CONTACT 1024
#define FLAG_USER_OUT_CONTACT 2048

#define FLAG_CHAT_IN_CHAT 128

#define FLAG_ENCRYPTED 4096
#define FLAG_PENDING 8192

#pragma pack(push,4)

typedef struct { int type; int id; } tgl_peer_id_t;

enum tgl_dc_state {
  st_init,
  st_reqpq_sent,
  st_reqdh_sent,
  st_client_dh_sent,
  st_init_temp,
  st_reqpq_sent_temp,
  st_reqdh_sent_temp,
  st_client_dh_sent_temp,
  st_authorized,
  st_error
};

#define MAX_DC_SESSIONS 3

struct tgl_session {
  struct tgl_dc *dc;
  long long session_id;
  int seq_no;
  struct connection *c;
  struct tree_long *ack_tree;
  struct event *ev;
  //struct event_timer ev;
};

struct tgl_dc {
  int id;
  int port;
  int flags;
  enum tgl_dc_state state;
  char *ip;
  //char *user;
  struct tgl_session *sessions[MAX_DC_SESSIONS];
  char auth_key[256];
  char temp_auth_key[256];
  char nonce[256];
  char new_nonce[256];
  char server_nonce[256];
  long long auth_key_id;
  long long temp_auth_key_id;

  long long server_salt;
  struct event *ev;

  int server_time_delta;
  double server_time_udelta;
  int has_auth;
};

enum tgl_message_media_type {
  tgl_message_media_none,
  tgl_message_media_photo,
  tgl_message_media_video,
  tgl_message_media_audio,
  tgl_message_media_document,
  tgl_message_media_geo,
  tgl_message_media_contact,
  tgl_message_media_unsupported,
  tgl_message_media_photo_encr,
  tgl_message_media_video_encr,
  tgl_message_media_audio_encr,
  tgl_message_media_document_encr,
};

enum tgl_message_action_type {
  tgl_message_action_none,
  tgl_message_action_geo_chat_create,
  tgl_message_action_geo_chat_checkin,
  tgl_message_action_chat_create,
  tgl_message_action_chat_edit_title,
  tgl_message_action_chat_edit_photo,
  tgl_message_action_chat_delete_photo,
  tgl_message_action_chat_add_user,
  tgl_message_action_chat_delete_user,
  tgl_message_action_set_message_ttl,
  tgl_message_action_read_messages,
  tgl_message_action_delete_messages,
  tgl_message_action_screenshot_messages,
  tgl_message_action_flush_history,
  tgl_message_action_notify_layer,
  tgl_message_action_typing
};

enum tgl_typing_status {
  tgl_typing_none,
  tgl_typing_typing,
  tgl_typing_cancel,
  tgl_typing_record_video,
  tgl_typing_upload_video,
  tgl_typing_record_audio,
  tgl_typing_upload_audio,
  tgl_typing_upload_photo,
  tgl_typing_upload_document,
  tgl_typing_geo,
  tgl_typing_choose_contact
};

struct tgl_file_location {
  int dc;
  long long volume;
  int local_id;
  long long secret;
};

struct tgl_photo_size {
  char *type;
  struct tgl_file_location loc;
  int w;
  int h;
  int size;
  char *data;
};

struct tgl_geo {
  double longitude;
  double latitude;
};

struct tgl_photo {
  long long id;
  long long access_hash;
  int user_id;
  int date;
  char *caption;
  struct tgl_geo geo;
  int sizes_num;
  struct tgl_photo_size *sizes;
};

struct tgl_encr_photo {
  long long id;
  long long access_hash;
  int dc_id;
  int size;
  int key_fingerprint;

  unsigned char *key;
  unsigned char *iv;
  int w;
  int h;
};

struct tgl_encr_video {
  long long id;
  long long access_hash;
  int dc_id;
  int size;
  int key_fingerprint;
  
  unsigned char *key;
  unsigned char *iv;
  int w;
  int h;
  int duration;
  char *mime_type;
};

struct tgl_encr_audio {
  long long id;
  long long access_hash;
  int dc_id;
  int size;
  int key_fingerprint;
  
  unsigned char *key;
  unsigned char *iv;
  int duration;
  char *mime_type;
};

struct tgl_encr_document {
  long long id;
  long long access_hash;
  int dc_id;
  int size;
  int key_fingerprint;
  
  unsigned char *key;
  unsigned char *iv;
  char *file_name;
  char *mime_type;
};

struct tgl_encr_file {
  char *filename;
  unsigned char *key;
  unsigned char *iv;
};


struct tgl_user_status {
  int online;
  int when;
};

struct tgl_user {
  tgl_peer_id_t id;
  int flags;
  struct tgl_message *last;
  char *print_name;
  int structure_version;
  struct tgl_file_location photo_big;
  struct tgl_file_location photo_small;
  long long photo_id;
  struct tgl_photo photo;
  char *first_name;
  char *last_name;
  char *phone;
  long long access_hash;
  struct tgl_user_status status;
  int blocked;
  char *real_first_name;
  char *real_last_name;
  char *username;
};

struct tgl_chat_user {
  int user_id;
  int inviter_id;
  int date;
};

struct tgl_chat {
  tgl_peer_id_t id;
  int flags;
  struct tgl_message *last;
  char *print_title;
  int structure_version;
  struct tgl_file_location photo_big;
  struct tgl_file_location photo_small;
  struct tgl_photo photo;
  char *title;
  int users_num;
  int user_list_size;
  int user_list_version;
  struct tgl_chat_user *user_list;
  int date;
  int version;
  int admin_id;
};

enum tgl_secret_chat_state {
  sc_none,
  sc_waiting,
  sc_request,
  sc_ok,
  sc_deleted
};

struct tgl_secret_chat {
  tgl_peer_id_t id;
  int flags;
  struct tgl_message *last;
  char *print_name;
  int structure_version;
  struct tgl_file_location photo_big;
  struct tgl_file_location photo_small;
  struct tgl_photo photo;
  int user_id;
  int admin_id;
  int date;
  int ttl;
  int layer;
  int in_seq_no;
  int out_seq_no;
  long long access_hash;
  unsigned char *g_key;
  unsigned char *nonce;

  enum tgl_secret_chat_state state;
  int key[64];
  long long key_fingerprint;
};

typedef union tgl_peer {
  struct {
    tgl_peer_id_t id;
    int flags;
    struct tgl_message *last;
    char *print_name;
    int structure_version;
    struct tgl_file_location photo_big;
    struct tgl_file_location photo_small;
    struct tgl_photo photo;
  };
  struct tgl_user user;
  struct tgl_chat chat;
  struct tgl_secret_chat encr_chat;
} tgl_peer_t;

struct tgl_video {
  long long id;
  long long access_hash;
  int user_id;
  int date;
  int size;
  int dc_id;
  struct tgl_photo_size thumb;
  char *caption;
  int duration;
  int w;
  int h;
  char *mime_type;
};

struct tgl_audio {
  long long id;
  long long access_hash;
  int user_id;
  int date;
  int size;
  int dc_id;
  int duration;
  char *mime_type;
};

struct tgl_document {
  long long id;
  long long access_hash;
  int user_id;
  int date;
  int size;
  int dc_id;
  struct tgl_photo_size thumb;
  char *caption;
  char *mime_type;
};

struct tgl_message_action {
  enum tgl_message_action_type type;
  union {
    struct {
      char *title;
      int user_num;
      int *users;
    };
    char *new_title;
    struct tgl_photo photo;
    int user;
    int ttl;
    int layer;
    int read_cnt;
    int delete_cnt;
    int screenshot_cnt;
    enum tgl_typing_status typing;
  };
};

struct tgl_message_media {
  enum tgl_message_media_type type;
  union {
    struct tgl_photo photo;
    struct tgl_video video;
    struct tgl_audio audio;
    struct tgl_document document;
    struct tgl_geo geo;
    struct {
      char *phone;
      char *first_name;
      char *last_name;
      int user_id;
    };
    struct tgl_encr_photo encr_photo;
    struct tgl_encr_video encr_video;
    struct tgl_encr_audio encr_audio;
    struct tgl_encr_document encr_document;
    struct tgl_encr_file encr_file;
    struct {
      void *data;
      int data_size;
    };
  };
};

struct tgl_message {
  struct tgl_message *next_use, *prev_use;
  struct tgl_message *next, *prev;
  long long id;
  int flags;
  tgl_peer_id_t fwd_from_id;
  int fwd_date;
  tgl_peer_id_t from_id;
  tgl_peer_id_t to_id;
  int out;
  int unread;
  int date;
  int service;
  union {
    struct tgl_message_action action;
    struct {
      char *message;
      int message_len;
      struct tgl_message_media media;
    };
  };
};
#pragma pack(pop)
#endif