#ifndef IPERF_H
#define IPERF_H

#include <stdint.h>
#include <stdbool.h>
#include "led_strip.h" // Needed for the handle type

// --- Configuration Flags ---
#define IPERF_FLAG_CLIENT (1 << 0)
#define IPERF_FLAG_SERVER (1 << 1)
#define IPERF_FLAG_TCP    (1 << 2)
#define IPERF_FLAG_UDP    (1 << 3)

// --- Defaults ---
#define IPERF_DEFAULT_PORT      5001
#define IPERF_DEFAULT_INTERVAL  3
#define IPERF_DEFAULT_TIME      30
#define IPERF_TRAFFIC_TASK_PRIORITY  4
#define IPERF_REPORT_TASK_PRIORITY   5

#define IPERF_SOCKET_RX_TIMEOUT 10
#define IPERF_SOCKET_ACCEPT_TIMEOUT 5

// --- Buffer Sizes ---
#define IPERF_UDP_TX_LEN (1470)
#define IPERF_UDP_RX_LEN (16 << 10)
#define IPERF_TCP_TX_LEN (16 << 10)
#define IPERF_TCP_RX_LEN (16 << 10)

// --- NVS Keys ---
#define NVS_KEY_IPERF_ENABLE "iperf_enabled"
#define NVS_KEY_IPERF_PERIOD "iperf_period"
#define NVS_KEY_IPERF_ROLE   "iperf_role"
#define NVS_KEY_IPERF_DST_IP "iperf_dst_ip"
#define NVS_KEY_IPERF_PORT   "iperf_port"
#define NVS_KEY_IPERF_PROTO  "iperf_proto"
#define NVS_KEY_IPERF_BURST  "iperf_burst"
#define NVS_KEY_IPERF_LEN    "iperf_len"

typedef struct {
    uint32_t flag;
    uint8_t  type;
    uint32_t dip;
    uint16_t dport;
    uint16_t sport;
    uint32_t interval;
    uint32_t time;

    // Pacing
    uint32_t pacing_period_us;
    uint32_t burst_count;

    uint32_t send_len;
    uint32_t buffer_len;
} iperf_cfg_t;

typedef struct {
    uint64_t total_len;
    uint32_t buffer_len;
    uint32_t sockfd;
    uint32_t actual_len;
    uint32_t packet_count;
    uint8_t  *buffer;
    uint32_t udp_lost_counter;
    uint32_t udp_packet_counter;
} iperf_traffic_t;

typedef struct {
    int32_t id;
    uint32_t tv_sec;
    uint32_t tv_usec;
    uint32_t id2;
} udp_datagram;

typedef struct {
    int32_t flags;
    int32_t numThreads;
    int32_t mPort;
    int32_t mBufLen;
    int32_t mWinBand;
    int32_t mAmount;
} client_hdr_v1;

#define HEADER_VERSION1 0x80000000

// --- Public API ---

/**
 * @brief Initialize the LED for Iperf status indication.
 * @param handle The LED strip handle (created in main/status_led).
 */
void iperf_init_led(led_strip_handle_t handle);

/**
 * @brief Set the target pacing rate in Packets Per Second (PPS).
 * Converts PPS to microsecond interval internally.
 * @param pps Target rate (e.g., 100 = 100 packets/sec)
 */
void iperf_set_pps(uint32_t pps);

/**
 * @brief Get the current target rate in PPS.
 */
uint32_t iperf_get_pps(void);

void iperf_start(iperf_cfg_t *cfg);
void iperf_stop(void);

#endif // IPERF_H