/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */ 

/*! \file flexran_agent_ran_api.h
 * \brief FlexRAN RAN API abstraction header 
 * \author N. Nikaein, X. Foukas and S. SHARIAT BAGHERI
 * \date 2017
 * \version 0.1
 */

#include <stdio.h>
#include <time.h>

#include "flexran_agent_common.h"
#include "flexran_agent_common_internal.h"
#include "flexran_agent_extern.h"
#include "flexran_agent_defs.h"


#include "enb_config.h"
#include "LAYER2/RLC/rlc.h"
#include "SCHED/sched_eNB.h"
#include "pdcp.h"
#include "RRC/LTE/rrc_extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#include "RRC/LTE/rrc_eNB_UE_context.h"
#include "PHY/phy_extern.h"
#include "log.h"

/****************************
 * get generic info from RAN
 ****************************/

uint32_t flexran_get_current_time_ms(mid_t mod_id, int subframe_flag);

/*Return the current frame number
 *Could be using implementation specific numbering of frames
 */
frame_t flexran_get_current_frame(mid_t mod_id);

/*Return the current SFN (0-1023)*/ 
frame_t flexran_get_current_system_frame_num(mid_t mod_id);

sub_frame_t flexran_get_current_subframe(mid_t mod_id);

/*Return the frame and subframe number in compact 16-bit format.
  Bits 0-3 subframe, rest for frame. Required by FlexRAN protocol*/
uint16_t flexran_get_sfn_sf(mid_t mod_id);

/* Return a future frame and subframe number that is ahead_of_time
   subframes later in compact 16-bit format. Bits 0-3 subframe,
   rest for frame */
uint16_t flexran_get_future_sfn_sf(mid_t mod_id, int ahead_of_time);

/* Return the number of attached UEs */
int flexran_get_num_ues(mid_t mod_id);

/* Get the rnti of a UE with id ue_id */
rnti_t flexran_get_ue_crnti(mid_t mod_id, mid_t ue_id);

/* Get the RLC buffer status report in bytes of a ue for a designated
 * logical channel id */
int flexran_get_ue_bsr_ul_buffer_info(mid_t mod_id, mid_t ue_id, lcid_t lcid);

/* Get power headroom of UE with id ue_id */
int8_t flexran_get_ue_phr(mid_t mod_id, mid_t ue_id);

/* Get the UE wideband CQI */
uint8_t flexran_get_ue_wcqi(mid_t mod_id, mid_t ue_id);

/* Get the transmission queue size for a UE with a channel_id logical channel id */
rlc_buffer_occupancy_t flexran_get_tx_queue_size(mid_t mod_id, mid_t ue_id, logical_chan_id_t channel_id);

/*Get number of pdus in RLC buffer*/
rlc_buffer_occupancy_t flexran_get_num_pdus_buffer(mid_t mod_id, mid_t ue_id, logical_chan_id_t channel_id);

/* Get the head of line delay for a UE with a channel_id logical channel id */
frame_t flexran_get_hol_delay(mid_t mod_id, mid_t ue_id, logical_chan_id_t channel_id);

/* Check the status of the timing advance for a UE */
int32_t flexran_get_TA(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

/* Update the timing advance status(find out whether a timing advance command is required) */
/* currently broken
void flexran_update_TA(mid_t mod_id, mid_t ue_id, uint8_t cc_id); */

/* Return timing advance MAC control element for a designated cell and UE */
/* this function is broken */
int flexran_get_MAC_CE_bitmap_TA(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

/*Get number of mac SDU DL*/
uint32_t flexran_get_num_mac_sdu_tx(mid_t mod_id, mid_t ue_id, int cc_id);

/*Return the MAC sdu size got from logical channel lcid */
uint32_t flexran_get_mac_sdu_size(mid_t mod_id, mid_t ue_id, int cc_id, int lcid);

/*Return number of MAC SDUs obtained in MAC layer*/
uint32_t flexran_get_num_mac_sdu_tx(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get mac sdu lcid index*/
unsigned char flexran_get_mac_sdu_lcid_index(mid_t mod_id, mid_t ue_id, int cc_id, int index);

/*Get MAC size sdus length dl*/
uint32_t flexran_get_size_dl_mac_sdus(mid_t mod_id, int cc_id);

/*Get MAC size sdus length ul */
uint32_t flexran_get_size_ul_mac_sdus(mid_t mod_id, int cc_id);

/*Get total size DL MAC SDUS*/
uint32_t flexran_get_total_size_dl_mac_sdus(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get total size of UL mac SDUS*/
uint32_t flexran_get_total_size_ul_mac_sdus(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get total number of PDU DL*/
uint32_t flexran_get_total_num_pdu_dl(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get total number of PDU UL*/
uint32_t flexran_get_total_num_pdu_ul(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get total PRB dl TODO Should be changed*/
uint32_t flexran_get_total_prb_dl_tx_per_ue(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get total PRB ul TODO Should be changed*/
uint32_t flexran_get_total_prb_ul_rx_per_ue(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get number of prb for tx per UE DL*/
uint16_t flexran_get_num_prb_dl_tx_per_ue(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get number of prb for rx per UE UL*/
uint16_t flexran_get_num_prb_ul_rx_per_ue(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get number of prb for retx per UE UL*/
uint32_t flexran_get_num_prb_retx_ul_per_ue(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get number of prb for retx per UE*/
uint16_t flexran_get_num_prb_retx_dl_per_ue(mid_t mod_id, mid_t ue_id, int cc_id);

/*MCS before rate adaptation DL*/
uint8_t flexran_get_mcs1_dl(mid_t mod_id, mid_t ue_id, int cc_id);

/*MCS after rate adaptation DL*/
uint8_t flexran_get_mcs2_dl(mid_t mod_id, mid_t ue_id, int cc_id);

/*MCS before rate adaptation UL*/
uint8_t flexran_get_mcs1_ul(mid_t mod_id, mid_t ue_id, int cc_id);

/*MCS after rate adaptation UL*/
uint8_t flexran_get_mcs2_ul(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get downlink TBS*/
uint32_t flexran_get_TBS_dl(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get uplink TBS */
uint32_t flexran_get_TBS_ul(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get total TBS DL*/
uint64_t flexran_get_total_TBS_dl(mid_t mod_id, mid_t ue_id, int cc_id);

/*Get total TBS DL*/
uint64_t flexran_get_total_TBS_ul(mid_t mod_id, mid_t ue_id, int cc_id);

/* Get the current HARQ round for UE ue_id */
int flexran_get_harq_round(mid_t mod_id, uint8_t cc_id, mid_t ue_id);

/* Get the number of active component carriers for a specific UE */
int flexran_get_active_CC(mid_t mod_id, mid_t ue_id);

/* Get the rank indicator for a designated cell and UE */
uint8_t flexran_get_current_RI(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

/* See TS 36.213, section 10.1 */
uint16_t flexran_get_n1pucch_an(mid_t mod_id, uint8_t cc_id);

/* See TS 36.211, section 5.4 */
uint8_t flexran_get_nRB_CQI(mid_t mod_id, uint8_t cc_id);

/* See TS 36.211, section 5.4 */
uint8_t flexran_get_deltaPUCCH_Shift(mid_t mod_id, uint8_t cc_id);

/* See TS 36.211, section 5.7.1 */
uint8_t flexran_get_prach_ConfigIndex(mid_t mod_id, uint8_t cc_id);

/* See TS 36.211, section 5.7.1 */
uint8_t flexran_get_prach_FreqOffset(mid_t mod_id, uint8_t cc_id);

/* See TS 36.321 */
uint8_t flexran_get_maxHARQ_Msg3Tx(mid_t mod_id, uint8_t cc_id);

/* Get the length of the UL cyclic prefix */
lte_prefix_type_t flexran_get_ul_cyclic_prefix_length(mid_t mod_id, uint8_t cc_id);

/* Get the length of the DL cyclic prefix */
lte_prefix_type_t flexran_get_dl_cyclic_prefix_length(mid_t mod_id, uint8_t cc_id);

/* Get the physical cell id of a cell */
uint16_t flexran_get_cell_id(mid_t mod_id, uint8_t cc_id);

/* See TS 36.211, section 5.5.3.2 */
uint8_t flexran_get_srs_BandwidthConfig(mid_t mod_id, uint8_t cc_id);

/* See TS 36.211, table 5.5.3.3-1 and 2 */
uint8_t flexran_get_srs_SubframeConfig(mid_t mod_id, uint8_t cc_id);

/* Boolean value. See TS 36.211,
   section 5.5.3.2. TDD only */
uint8_t flexran_get_srs_MaxUpPts(mid_t mod_id, uint8_t cc_id);

/* Get number of DL resource blocks */
uint8_t flexran_get_N_RB_DL(mid_t mod_id, uint8_t cc_id);

/* Get number of UL resource blocks */
uint8_t flexran_get_N_RB_UL(mid_t mod_id, uint8_t cc_id);

/* Get number of resource block groups */
uint8_t flexran_get_N_RBG(mid_t mod_id, uint8_t cc_id);

/* Get DL/UL subframe assignment. TDD only */
uint8_t flexran_get_subframe_assignment(mid_t mod_id, uint8_t cc_id);

/* TDD only. See TS 36.211, table 4.2.1 */
uint8_t flexran_get_special_subframe_assignment(mid_t mod_id, uint8_t cc_id);

/* Get the duration of the random access response window in subframes */
long flexran_get_ra_ResponseWindowSize(mid_t mod_id, uint8_t cc_id);

/* Get timer used for random access */
long flexran_get_mac_ContentionResolutionTimer(mid_t mod_id, uint8_t cc_id);

/* Get type of duplex mode(FDD/TDD) */
Protocol__FlexDuplexMode flexran_get_duplex_mode(mid_t mod_id, uint8_t cc_id);

/* Get the SI window length */
long flexran_get_si_window_length(mid_t mod_id, uint8_t cc_id);

/* Get length of SystemInformationBlock1 */
uint8_t flexran_get_sib1_length(mid_t mod_id, uint8_t cc_id);

/* Get the number of PDCCH symbols configured for the cell */
uint8_t flexran_get_num_pdcch_symb(mid_t mod_id, uint8_t cc_id);

uint8_t flexran_get_antenna_ports(mid_t mod_id, uint8_t cc_id);

/* See TS 36.213, sec 5.1.1.1 */
int flexran_get_tpc(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

uint8_t flexran_get_ue_wpmi(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

/* Get the first available HARQ process for a specific cell and UE during 
   a designated frame and subframe. Returns 0 for success. The id and the 
   status of the HARQ process are stored in id and status respectively */
/* currently broken
int flexran_get_harq(mid_t mod_id, uint8_t cc_id, mid_t ue_id, frame_t frame,
                     sub_frame_t subframe, unsigned char *id, unsigned char *round,
                     uint8_t harq_flag); */

/* Uplink power control management*/
int32_t flexran_get_p0_pucch_dbm(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

int8_t flexran_get_p0_nominal_pucch(mid_t mod_id, uint8_t cc_id);

int32_t flexran_get_p0_pucch_status(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

int flexran_update_p0_pucch(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

uint8_t flexran_get_threequarter_fs(mid_t mod_id, uint8_t cc_id);

PUSCH_HOPPING_t flexran_get_hopping_mode(mid_t mod_id, uint8_t cc_id);

uint8_t flexran_get_hopping_offset(mid_t mod_id, uint8_t cc_id);

uint8_t flexran_get_n_SB(mid_t mod_id, uint8_t cc_id);

int flexran_get_phich_resource(mid_t mod_id, uint8_t cc_id);

uint8_t flexran_get_enable64QAM(mid_t mod_id, uint8_t cc_id);

PHICH_DURATION_t flexran_get_phich_duration(mid_t mod_id, uint8_t cc_id);

/*
 * ************************************
 * Get Messages for UE Configuration Reply
 * ************************************
 */

/* Get timer in subframes. Controls the synchronization
   status of the UE, not the actual timing 
   advance procedure. See TS 36.321 */
TimeAlignmentTimer_t flexran_get_time_alignment_timer(mid_t mod_id, mid_t ue_id);

/* Get measurement gap configuration. See TS 36.133 */
Protocol__FlexMeasGapConfigPattern flexran_get_meas_gap_config(mid_t mod_id, mid_t ue_id);

/* Get measurement gap configuration offset if applicable */
long flexran_get_meas_gap_config_offset(mid_t mod_id, mid_t ue_id);

/* DL aggregated bit-rate of non-gbr bearer
   per UE. See TS 36.413 */
uint64_t flexran_get_ue_aggregated_max_bitrate_dl(mid_t mod_id, mid_t ue_id);

/* UL aggregated bit-rate of non-gbr bearer
   per UE. See TS 36.413 */
uint64_t flexran_get_ue_aggregated_max_bitrate_ul(mid_t mod_id, mid_t ue_id);

/* Only half-duplex support. FDD operation. Boolean value */
int flexran_get_half_duplex(mid_t mod_id, mid_t ue_id);

/* Support of intra-subframe hopping.  Boolean value */
int flexran_get_intra_sf_hopping(mid_t mod_id, mid_t ue_id);

/* UE support for type 2 hopping with n_sb>1 */
int flexran_get_type2_sb_1(mid_t mod_id, mid_t ue_id);

/* Get the UE category */
long flexran_get_ue_category(mid_t mod_id, mid_t ue_id);

/* UE support for resource allocation type 1 */
int flexran_get_res_alloc_type1(mid_t mod_id, mid_t ue_id);

/* Get UE transmission mode */
long flexran_get_ue_transmission_mode(mid_t mod_id, mid_t ue_id);

/* Boolean value. See TS 36.321 */
BOOLEAN_t flexran_get_tti_bundling(mid_t mod_id, mid_t ue_id);

/* The max HARQ retransmission for UL.
   See TS 36.321 */
long flexran_get_maxHARQ_TX(mid_t mod_id, mid_t ue_id);

/* See TS 36.213 */
long flexran_get_beta_offset_ack_index(mid_t mod_id, mid_t ue_id);

/* See TS 36.213 */
long flexran_get_beta_offset_ri_index(mid_t mod_id, mid_t ue_id);

/* See TS 36.213 */
long flexran_get_beta_offset_cqi_index(mid_t mod_id, mid_t ue_id);

/* Boolean. See TS36.213, Section 10.1 */
BOOLEAN_t flexran_get_simultaneous_ack_nack_cqi(mid_t mod_id, mid_t ue_id);

/* Boolean. See TS 36.213, Section 8.2 */
BOOLEAN_t flexran_get_ack_nack_simultaneous_trans(mid_t mod_id, mid_t ue_id, uint8_t cc_id);

/* Get aperiodic CQI report mode */
CQI_ReportModeAperiodic_t flexran_get_aperiodic_cqi_rep_mode(mid_t mod_id,mid_t ue_id);

/* Get ACK/NACK feedback mode. TDD only */
long flexran_get_tdd_ack_nack_feedback_mode(mid_t mod_id, mid_t ue_id);

/* See TS36.213, section 10.1 */
long flexran_get_ack_nack_repetition_factor(mid_t mod_id, mid_t ue_id);

/* Boolean. Extended buffer status report size */
long flexran_get_extended_bsr_size(mid_t mod_id, mid_t ue_id);

/* Get number of UE transmission antennas */
int flexran_get_ue_transmission_antenna(mid_t mod_id, mid_t ue_id);

/* Get the IMSI of UE */
uint64_t flexran_get_ue_imsi(mid_t mod_id, mid_t ue_id);

/* Get logical channel group of a channel with id lc_id */
long flexran_get_lcg(mid_t mod_id, mid_t ue_id, mid_t lc_id);

/* Get direction of logical channel with id lc_id */
int flexran_get_direction(mid_t ue_id, mid_t lc_id);

/*Get downlink frequency*/
uint32_t flexran_agent_get_operating_dl_freq(mid_t mod_id, uint8_t cc_id);

/*Get uplink frequency*/
uint32_t flexran_agent_get_operating_ul_freq(mid_t mod_id, uint8_t cc_id);

/*Get eutra band*/
uint8_t flexran_agent_get_operating_eutra_band(mid_t mod_id, uint8_t cc_id);

/*Get downlink ref signal power*/
int8_t flexran_agent_get_operating_pdsch_refpower(mid_t mod_id, uint8_t cc_id);

/*Get uplink power*/
long flexran_agent_get_operating_pusch_p0(mid_t mod_id, uint8_t cc_id);

/*set the dl freq */
void flexran_agent_set_operating_dl_freq(mid_t mod_id, uint8_t cc_id, uint32_t dl_freq_mhz);

/* set the ul freq */
void flexran_agent_set_operating_ul_freq(mid_t mod_id, uint8_t cc_id, int32_t ul_freq_mhz_offset);

/*set the the band */
void flexran_agent_set_operating_eutra_band(mid_t mod_id, uint8_t cc_id, uint8_t eutra_band);

/* set the bandwidth (in RB) */
void flexran_agent_set_operating_bandwidth(mid_t mod_id, uint8_t cc_id, uint8_t N_RB);

/*set frame type*/
void flexran_agent_set_operating_frame_type(mid_t mod_id, uint8_t cc_id, lte_frame_type_t frame_type);

/*RRC status flexRAN*/
uint8_t flexran_get_rrc_status(mid_t mod_id, mid_t ue_id);


/***************************** PDCP ***********************/

/*PDCP superframe numberflexRAN*/
uint32_t flexran_get_pdcp_sfn(const mid_t mod_id);

/*PDCP pdcp tx stats window*/
void flexran_set_pdcp_tx_stat_window(const mid_t mod_id, const mid_t ue_id, uint16_t obs_window);

/*PDCP pdcp rx stats window*/
void flexran_set_pdcp_rx_stat_window(const mid_t mod_id, const mid_t ue_id, uint16_t obs_window);

/*PDCP num tx pdu status flexRAN*/
uint32_t flexran_get_pdcp_tx(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP num tx bytes status flexRAN*/
uint32_t flexran_get_pdcp_tx_bytes(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP number of transmit packet / second status flexRAN*/
uint32_t flexran_get_pdcp_tx_w(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP pdcp tx bytes in a given window flexRAN*/
uint32_t flexran_get_pdcp_tx_bytes_w(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP tx sequence number flexRAN*/
uint32_t flexran_get_pdcp_tx_sn(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP tx aggregated packet arrival  flexRAN*/
uint32_t flexran_get_pdcp_tx_aiat(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP tx aggregated packet arrival per second flexRAN*/
uint32_t flexran_get_pdcp_tx_aiat_w(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);


/*PDCP num rx pdu status flexRAN*/
uint32_t flexran_get_pdcp_rx(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP num rx bytes status flexRAN*/
uint32_t flexran_get_pdcp_rx_bytes(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP number of received packet / second  flexRAN*/
uint32_t flexran_get_pdcp_rx_w(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP gootput (bit/s) status flexRAN*/
uint32_t flexran_get_pdcp_rx_bytes_w(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP rx sequence number flexRAN*/
uint32_t flexran_get_pdcp_rx_sn(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP rx aggregated packet arrival  flexRAN*/
uint32_t flexran_get_pdcp_rx_aiat(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP rx aggregated packet arrival per second flexRAN*/
uint32_t flexran_get_pdcp_rx_aiat_w(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*PDCP num of received outoforder pdu status flexRAN*/
uint32_t flexran_get_pdcp_rx_oo(const mid_t mod_id,  const mid_t ue_id, const lcid_t lcid);

/*********************RRC**********************/
/*Get primary cell measuremeant id flexRAN*/
MeasId_t flexran_get_rrc_pcell_measid(mid_t mod_id, mid_t ue_id);

/*Get primary cell RSRP measurement flexRAN*/  
float flexran_get_rrc_pcell_rsrp(mid_t mod_id, mid_t ue_id);

/*Get primary cell RSRQ measurement flexRAN*/
float flexran_get_rrc_pcell_rsrq(mid_t mod_id, mid_t ue_id);

/* Get RRC neighbouring measurement */
int flexran_get_rrc_num_ncell(mid_t mod_id, mid_t ue_id);

/*Get physical cell id*/
PhysCellId_t flexran_get_rrc_neigh_phy_cell_id(mid_t mod_id, mid_t ue_id, int cell_id);

/*Get RSRP of neighbouring Cell*/
float flexran_get_rrc_neigh_rsrp(mid_t mod_id, mid_t ue_id, int cell_id);

/*Get RSRQ of neighbouring Cell*/
float flexran_get_rrc_neigh_rsrq(mid_t mod_id, mid_t ue_id, int cell_id);

/*Get MCC PLMN identity neighbouring Cell*/
/* currently not implemented
int flexran_get_rrc_neigh_plmn_mcc(mid_t mod_id, mid_t ue_id, int cell_id); */

/*Get MNC PLMN identity neighbouring Cell*/
/* currently not implemented
int flexran_get_rrc_neigh_plmn_mnc(mid_t mod_id, mid_t ue_id, int cell_id); */
