#include "receiver_pipeline.h"

#include <Arduino.h>
#include <math.h>
#include <stdarg.h>

#include "config.h"
#include "display_ui.h"
#include "json_codec.h"
#include "lora_transport.h"
#include "mqtt_client.h"
#include "payload_codec.h"
#include "power_manager.h"
#include "sd_logger.h"
#include "time_manager.h"
#include "web_server.h"
#include "wifi_manager.h"

#ifdef ARDUINO_ARCH_ESP32
#include <esp_task_wdt.h>
#endif

namespace {

static uint16_t g_short_id = 0;
static char g_device_id[16] = "";
static ReceiverSharedState *g_shared = nullptr;
static RxRejectReason g_receiver_rx_reject_reason = RxRejectReason::None;
static uint32_t g_receiver_rx_reject_log_ms = 0;

#define g_sender_statuses (g_shared->sender_statuses)
#define g_sender_faults_remote (g_shared->sender_faults_remote)
#define g_sender_faults_remote_published (g_shared->sender_faults_remote_published)
#define g_sender_last_error_remote (g_shared->sender_last_error_remote)
#define g_sender_last_error_remote_published (g_shared->sender_last_error_remote_published)
#define g_sender_last_error_remote_utc (g_shared->sender_last_error_remote_utc)
#define g_sender_last_error_remote_ms (g_shared->sender_last_error_remote_ms)
#define g_sender_discovery_sent (g_shared->sender_discovery_sent)
#define g_last_batch_id_rx (g_shared->last_batch_id_rx)
#define g_receiver_faults (g_shared->receiver_faults)
#define g_receiver_faults_published (g_shared->receiver_faults_published)
#define g_receiver_last_error (g_shared->receiver_last_error)
#define g_receiver_last_error_published (g_shared->receiver_last_error_published)
#define g_receiver_last_error_utc (g_shared->receiver_last_error_utc)
#define g_receiver_last_error_ms (g_shared->receiver_last_error_ms)
#define g_receiver_discovery_sent (g_shared->receiver_discovery_sent)
#define g_ap_mode (g_shared->ap_mode)

static void watchdog_kick() {
#ifdef ARDUINO_ARCH_ESP32
  esp_task_wdt_reset();
#endif
}

static constexpr size_t BATCH_HEADER_SIZE = 6;
static constexpr size_t BATCH_CHUNK_PAYLOAD = LORA_MAX_PAYLOAD - BATCH_HEADER_SIZE;
static constexpr size_t BATCH_MAX_COMPRESSED = 4096;
static constexpr uint32_t BATCH_RX_MARGIN_MS = 800;

static void serial_debug_printf(const char *fmt, ...) {
  if (!SERIAL_DEBUG_MODE) {
    return;
  }
  char buf[256];
  va_list args;
  va_start(args, fmt);
  vsnprintf(buf, sizeof(buf), fmt, args);
  va_end(args);
  Serial.println(buf);
}

static uint8_t bit_count32(uint32_t value) {
  uint8_t count = 0;
  while (value != 0) {
    value &= (value - 1);
    count++;
  }
  return count;
}

static bool mqtt_publish_sample(const MeterData &data) {
#ifdef ENABLE_TEST_MODE
  String payload;
  if (!meterDataToJson(data, payload)) {
    return false;
  }
  return mqtt_publish_test(data.device_id, payload);
#else
  return mqtt_publish_state(data);
#endif
}

struct BatchRxState {
  bool active;
  uint16_t batch_id;
  uint8_t next_index;
  uint8_t expected_chunks;
  uint16_t total_len;
  uint16_t received_len;
  uint32_t last_rx_ms;
  uint32_t timeout_ms;
  uint8_t buffer[BATCH_MAX_COMPRESSED];
};

static BatchRxState g_batch_rx = {};

static void init_sender_statuses() {
  for (uint8_t i = 0; i < NUM_SENDERS; ++i) {
    g_sender_statuses[i] = {};
    g_sender_statuses[i].has_data = false;
    g_sender_statuses[i].last_update_ts_utc = 0;
    g_sender_statuses[i].rx_batches_total = 0;
    g_sender_statuses[i].rx_batches_duplicate = 0;
    g_sender_statuses[i].rx_last_duplicate_ts_utc = 0;
    g_sender_statuses[i].last_data.short_id = EXPECTED_SENDER_IDS[i];
    snprintf(g_sender_statuses[i].last_data.device_id, sizeof(g_sender_statuses[i].last_data.device_id), "dd3-%04X", EXPECTED_SENDER_IDS[i]);
    g_sender_faults_remote[i] = {};
    g_sender_faults_remote_published[i] = {};
    g_sender_last_error_remote[i] = FaultType::None;
    g_sender_last_error_remote_published[i] = FaultType::None;
    g_sender_last_error_remote_utc[i] = 0;
    g_sender_last_error_remote_ms[i] = 0;
    g_sender_discovery_sent[i] = false;
  }
}

static void receiver_note_rx_reject(RxRejectReason reason, const char *context) {
  if (reason == RxRejectReason::None) {
    return;
  }
  g_receiver_rx_reject_reason = reason;
  uint32_t now_ms = millis();
  if (SERIAL_DEBUG_MODE && now_ms - g_receiver_rx_reject_log_ms >= 1000) {
    g_receiver_rx_reject_log_ms = now_ms;
    serial_debug_printf("rx_reject: %s reason=%s", context, rx_reject_reason_text(reason));
  }
}

static void note_fault(FaultCounters &counters, FaultType &last_type, uint32_t &last_ts_utc, uint32_t &last_ts_ms, FaultType type) {
  if (type == FaultType::MeterRead) {
    counters.meter_read_fail++;
  } else if (type == FaultType::Decode) {
    counters.decode_fail++;
  } else if (type == FaultType::LoraTx) {
    counters.lora_tx_fail++;
  }
  last_type = type;
  last_ts_utc = time_get_utc();
  last_ts_ms = millis();
}

static void clear_faults(FaultCounters &counters, FaultType &last_type, uint32_t &last_ts_utc, uint32_t &last_ts_ms) {
  counters = {};
  last_type = FaultType::None;
  last_ts_utc = 0;
  last_ts_ms = 0;
}

static uint32_t age_seconds(uint32_t ts_utc, uint32_t ts_ms) {
  if (time_is_synced() && ts_utc > 0) {
    uint32_t now = time_get_utc();
    return now > ts_utc ? now - ts_utc : 0;
  }
  return (millis() - ts_ms) / 1000;
}

static bool counters_changed(const FaultCounters &a, const FaultCounters &b) {
  return a.meter_read_fail != b.meter_read_fail || a.decode_fail != b.decode_fail || a.lora_tx_fail != b.lora_tx_fail;
}

static void publish_faults_if_needed(const char *device_id, const FaultCounters &counters, FaultCounters &last_published,
                                     FaultType last_error, FaultType &last_error_published, uint32_t last_error_utc, uint32_t last_error_ms) {
  if (!mqtt_is_connected()) {
    return;
  }
  if (!counters_changed(counters, last_published) && last_error == last_error_published) {
    return;
  }
  uint32_t age = last_error != FaultType::None ? age_seconds(last_error_utc, last_error_ms) : 0;
  if (mqtt_publish_faults(device_id, counters, last_error, age)) {
    last_published = counters;
    last_error_published = last_error;
  }
}

static void write_u16_le(uint8_t *dst, uint16_t value) {
  dst[0] = static_cast<uint8_t>(value & 0xFF);
  dst[1] = static_cast<uint8_t>((value >> 8) & 0xFF);
}

static uint16_t read_u16_le(const uint8_t *src) {
  return static_cast<uint16_t>(src[0]) | (static_cast<uint16_t>(src[1]) << 8);
}

static void write_u16_be(uint8_t *dst, uint16_t value) {
  dst[0] = static_cast<uint8_t>((value >> 8) & 0xFF);
  dst[1] = static_cast<uint8_t>(value & 0xFF);
}

static uint16_t read_u16_be(const uint8_t *src) {
  return static_cast<uint16_t>(src[0] << 8) | static_cast<uint16_t>(src[1]);
}

static void write_u32_be(uint8_t *dst, uint32_t value) {
  dst[0] = static_cast<uint8_t>((value >> 24) & 0xFF);
  dst[1] = static_cast<uint8_t>((value >> 16) & 0xFF);
  dst[2] = static_cast<uint8_t>((value >> 8) & 0xFF);
  dst[3] = static_cast<uint8_t>(value & 0xFF);
}

static uint32_t read_u32_be(const uint8_t *src) {
  return (static_cast<uint32_t>(src[0]) << 24) |
      (static_cast<uint32_t>(src[1]) << 16) |
      (static_cast<uint32_t>(src[2]) << 8) |
      static_cast<uint32_t>(src[3]);
}

static uint16_t sender_id_from_short_id(uint16_t short_id) {
  for (uint8_t i = 0; i < NUM_SENDERS; ++i) {
    if (EXPECTED_SENDER_IDS[i] == short_id) {
      return static_cast<uint16_t>(i + 1);
    }
  }
  return 0;
}

static uint16_t short_id_from_sender_id(uint16_t sender_id) {
  if (sender_id == 0 || sender_id > NUM_SENDERS) {
    return 0;
  }
  return EXPECTED_SENDER_IDS[sender_id - 1];
}

static uint32_t compute_batch_rx_timeout_ms(uint16_t total_len, uint8_t chunk_count) {
  if (total_len == 0 || chunk_count == 0) {
    return 10000;
  }
  size_t max_chunk_payload = total_len > BATCH_CHUNK_PAYLOAD ? BATCH_CHUNK_PAYLOAD : total_len;
  size_t payload_len = BATCH_HEADER_SIZE + max_chunk_payload;
  size_t packet_len = 3 + payload_len + 2;
  uint32_t per_chunk_toa_ms = lora_airtime_ms(packet_len);
  uint32_t timeout_ms = static_cast<uint32_t>(chunk_count) * per_chunk_toa_ms + BATCH_RX_MARGIN_MS;
  return timeout_ms < 10000 ? 10000 : timeout_ms;
}

static void send_batch_ack(uint16_t batch_id, uint8_t sample_count) {
  uint32_t epoch = time_get_utc();
  uint8_t time_valid = (time_is_synced() && epoch >= MIN_ACCEPTED_EPOCH_UTC) ? 1 : 0;
  if (!time_valid) {
    epoch = 0;
  }
  LoraPacket ack = {};
  ack.msg_kind = LoraMsgKind::AckDown;
  ack.device_id_short = g_short_id;
  ack.payload_len = LORA_ACK_DOWN_PAYLOAD_LEN;
  ack.payload[0] = time_valid;
  write_u16_be(&ack.payload[1], batch_id);
  write_u32_be(&ack.payload[3], epoch);
  uint8_t repeats = ACK_REPEAT_COUNT == 0 ? 1 : ACK_REPEAT_COUNT;
  for (uint8_t i = 0; i < repeats; ++i) {
    lora_send(ack);
    if (i + 1 < repeats && ACK_REPEAT_DELAY_MS > 0) {
      delay(ACK_REPEAT_DELAY_MS);
    }
  }
  serial_debug_printf("ack: tx batch_id=%u time_valid=%u epoch=%lu samples=%u",
                      batch_id,
                      static_cast<unsigned>(time_valid),
                      static_cast<unsigned long>(epoch),
                      static_cast<unsigned>(sample_count));
  lora_receive_continuous();
}

static void reset_batch_rx() {
  g_batch_rx.active = false;
  g_batch_rx.batch_id = 0;
  g_batch_rx.next_index = 0;
  g_batch_rx.expected_chunks = 0;
  g_batch_rx.total_len = 0;
  g_batch_rx.received_len = 0;
  g_batch_rx.last_rx_ms = 0;
  g_batch_rx.timeout_ms = 0;
}

static bool process_batch_packet(const LoraPacket &pkt, BatchInput &out_batch, bool &decode_error, uint16_t &out_batch_id) {
  decode_error = false;
  if (pkt.payload_len < BATCH_HEADER_SIZE) {
    return false;
  }
  uint16_t batch_id = read_u16_le(&pkt.payload[0]);
  uint8_t chunk_index = pkt.payload[2];
  uint8_t chunk_count = pkt.payload[3];
  uint16_t total_len = read_u16_le(&pkt.payload[4]);
  const uint8_t *chunk_data = &pkt.payload[BATCH_HEADER_SIZE];
  size_t chunk_len = pkt.payload_len - BATCH_HEADER_SIZE;
  uint32_t now_ms = millis();

  if (!g_batch_rx.active || batch_id != g_batch_rx.batch_id || (now_ms - g_batch_rx.last_rx_ms > g_batch_rx.timeout_ms)) {
    if (chunk_index != 0) {
      reset_batch_rx();
      return false;
    }
    if (total_len == 0 || total_len > BATCH_MAX_COMPRESSED || chunk_count == 0) {
      reset_batch_rx();
      return false;
    }
    g_batch_rx.active = true;
    g_batch_rx.batch_id = batch_id;
    g_batch_rx.expected_chunks = chunk_count;
    g_batch_rx.total_len = total_len;
    g_batch_rx.received_len = 0;
    g_batch_rx.next_index = 0;
    g_batch_rx.timeout_ms = compute_batch_rx_timeout_ms(total_len, chunk_count);
  }

  if (!g_batch_rx.active || chunk_index != g_batch_rx.next_index || chunk_count != g_batch_rx.expected_chunks) {
    reset_batch_rx();
    return false;
  }

  if (g_batch_rx.received_len + chunk_len > g_batch_rx.total_len || g_batch_rx.received_len + chunk_len > BATCH_MAX_COMPRESSED) {
    reset_batch_rx();
    return false;
  }

  memcpy(&g_batch_rx.buffer[g_batch_rx.received_len], chunk_data, chunk_len);
  g_batch_rx.received_len += static_cast<uint16_t>(chunk_len);
  g_batch_rx.next_index++;
  g_batch_rx.last_rx_ms = now_ms;

  if (g_batch_rx.next_index == g_batch_rx.expected_chunks && g_batch_rx.received_len == g_batch_rx.total_len) {
    if (!decode_batch(g_batch_rx.buffer, g_batch_rx.received_len, &out_batch)) {
      decode_error = true;
      reset_batch_rx();
      return false;
    }
    out_batch_id = batch_id;
    reset_batch_rx();
    return true;
  }

  return false;
}

static void receiver_loop() {
  watchdog_kick();
  LoraPacket pkt = {};
  if (lora_receive(pkt, 0)) {
    if (pkt.msg_kind == LoraMsgKind::BatchUp) {
      BatchInput batch = {};
      bool decode_error = false;
      uint16_t batch_id = 0;
      if (process_batch_packet(pkt, batch, decode_error, batch_id)) {
        int8_t sender_idx = -1;
        for (uint8_t i = 0; i < NUM_SENDERS; ++i) {
          if (pkt.device_id_short == EXPECTED_SENDER_IDS[i]) {
            sender_idx = static_cast<int8_t>(i);
            break;
          }
        }

        if (sender_idx < 0) {
          receiver_note_rx_reject(RxRejectReason::UnknownSender, "batch");
          note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
          display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
          serial_debug_printf("batch: reject unknown_sender short_id=%04X sender_id=%u batch_id=%u",
                              pkt.device_id_short,
                              static_cast<unsigned>(batch.sender_id),
                              static_cast<unsigned>(batch_id));
          goto receiver_loop_done;
        }

        uint16_t expected_sender_id = static_cast<uint16_t>(sender_idx + 1);
        if (batch.sender_id != expected_sender_id) {
          receiver_note_rx_reject(RxRejectReason::DeviceIdMismatch, "batch");
          note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
          display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
          serial_debug_printf("batch: reject device_id_mismatch short_id=%04X sender_id=%u expected=%u batch_id=%u",
                              pkt.device_id_short,
                              static_cast<unsigned>(batch.sender_id),
                              static_cast<unsigned>(expected_sender_id),
                              static_cast<unsigned>(batch_id));
          goto receiver_loop_done;
        }

        bool duplicate = g_last_batch_id_rx[sender_idx] == batch_id;
        SenderStatus &status = g_sender_statuses[sender_idx];
        if (status.rx_batches_total < UINT32_MAX) {
          status.rx_batches_total++;
        }
        if (duplicate) {
          if (status.rx_batches_duplicate < UINT32_MAX) {
            status.rx_batches_duplicate++;
          }
          uint32_t duplicate_ts = time_get_utc();
          if (duplicate_ts == 0) {
            duplicate_ts = batch.t_last;
          }
          status.rx_last_duplicate_ts_utc = duplicate_ts;
        }

        send_batch_ack(batch_id, batch.n);
        if (duplicate) {
          goto receiver_loop_done;
        }
        g_last_batch_id_rx[sender_idx] = batch_id;
        if (batch.n == 0) {
          goto receiver_loop_done;
        }
        if (batch.n > METER_BATCH_MAX_SAMPLES) {
          note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
          display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
          goto receiver_loop_done;
        }
        if (bit_count32(batch.present_mask) != batch.n) {
          note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
          display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
          goto receiver_loop_done;
        }

        size_t count = batch.n;
        uint16_t short_id = pkt.device_id_short;
        if (short_id == 0) {
          short_id = short_id_from_sender_id(batch.sender_id);
        }
        if (batch.t_last < static_cast<uint32_t>(METER_BATCH_MAX_SAMPLES - 1) || batch.t_last < MIN_ACCEPTED_EPOCH_UTC) {
          note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
          display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
          goto receiver_loop_done;
        }
        const uint32_t window_start = batch.t_last - static_cast<uint32_t>(METER_BATCH_MAX_SAMPLES - 1);

        MeterData samples[METER_BATCH_MAX_SAMPLES];
        float bat_v = batch.battery_mV > 0 ? static_cast<float>(batch.battery_mV) / 1000.0f : NAN;
        size_t s = 0;
        for (uint8_t slot = 0; slot < METER_BATCH_MAX_SAMPLES; ++slot) {
          if ((batch.present_mask & (1UL << slot)) == 0) {
            continue;
          }
          if (s >= count) {
            note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
            display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
            goto receiver_loop_done;
          }
          MeterData &data = samples[s];
          data = {};
          data.short_id = short_id;
          if (short_id != 0) {
            snprintf(data.device_id, sizeof(data.device_id), "dd3-%04X", short_id);
          } else {
            snprintf(data.device_id, sizeof(data.device_id), "dd3-0000");
          }
          data.ts_utc = window_start + static_cast<uint32_t>(slot);
          if (data.ts_utc < MIN_ACCEPTED_EPOCH_UTC) {
            note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
            display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
            goto receiver_loop_done;
          }
          data.energy_total_kwh = static_cast<float>(batch.energy_wh[s]) / 1000.0f;
          data.phase_power_w[0] = static_cast<float>(batch.p1_w[s]);
          data.phase_power_w[1] = static_cast<float>(batch.p2_w[s]);
          data.phase_power_w[2] = static_cast<float>(batch.p3_w[s]);
          data.total_power_w = data.phase_power_w[0] + data.phase_power_w[1] + data.phase_power_w[2];
          data.battery_voltage_v = bat_v;
          data.battery_percent = !isnan(bat_v) ? battery_percent_from_voltage(bat_v) : 0;
          data.valid = true;
          data.link_valid = true;
          data.link_rssi_dbm = pkt.rssi_dbm;
          data.link_snr_db = pkt.snr_db;
          data.err_meter_read = batch.err_m;
          data.err_decode = batch.err_d;
          data.err_lora_tx = batch.err_tx;
          data.last_error = static_cast<FaultType>(batch.err_last);
          data.rx_reject_reason = batch.err_rx_reject;
          sd_logger_log_sample(data, (s + 1 == count) && data.last_error != FaultType::None);
          s++;
        }
        if (s != count) {
          note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
          display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
          goto receiver_loop_done;
        }

        web_server_set_last_batch(static_cast<uint8_t>(sender_idx), samples, count);
        for (size_t s = 0; s < count; ++s) {
          mqtt_publish_sample(samples[s]);
        }
        g_sender_statuses[sender_idx].last_data = samples[count - 1];
        g_sender_statuses[sender_idx].last_update_ts_utc = samples[count - 1].ts_utc;
        g_sender_statuses[sender_idx].has_data = true;
        g_sender_faults_remote[sender_idx].meter_read_fail = samples[count - 1].err_meter_read;
        g_sender_faults_remote[sender_idx].lora_tx_fail = samples[count - 1].err_lora_tx;
        g_sender_last_error_remote[sender_idx] = samples[count - 1].last_error;
        g_sender_last_error_remote_utc[sender_idx] = time_get_utc();
        g_sender_last_error_remote_ms[sender_idx] = millis();
        if (ENABLE_HA_DISCOVERY && !g_sender_discovery_sent[sender_idx]) {
          g_sender_discovery_sent[sender_idx] = mqtt_publish_discovery(samples[count - 1].device_id);
        }
        publish_faults_if_needed(samples[count - 1].device_id, g_sender_faults_remote[sender_idx], g_sender_faults_remote_published[sender_idx],
                                 g_sender_last_error_remote[sender_idx], g_sender_last_error_remote_published[sender_idx],
                                 g_sender_last_error_remote_utc[sender_idx], g_sender_last_error_remote_ms[sender_idx]);
      } else if (decode_error) {
        note_fault(g_receiver_faults, g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms, FaultType::Decode);
        display_set_last_error(g_receiver_last_error, g_receiver_last_error_utc, g_receiver_last_error_ms);
      }
    }
  }

receiver_loop_done:
  mqtt_loop();
  web_server_loop();
  if (ENABLE_HA_DISCOVERY && !g_receiver_discovery_sent) {
    g_receiver_discovery_sent = mqtt_publish_discovery(g_device_id);
  }
  publish_faults_if_needed(g_device_id, g_receiver_faults, g_receiver_faults_published,
                           g_receiver_last_error, g_receiver_last_error_published, g_receiver_last_error_utc, g_receiver_last_error_ms);
  display_set_receiver_status(g_ap_mode, wifi_is_connected() ? wifi_get_ssid().c_str() : "AP", mqtt_is_connected());
  display_tick();
  watchdog_kick();
}

} // namespace

bool ReceiverPipeline::begin(const ReceiverPipelineConfig &config) {
  if (!config.shared) {
    return false;
  }
  g_shared = config.shared;
  *g_shared = {};
  g_short_id = config.short_id;
  if (config.device_id) {
    strncpy(g_device_id, config.device_id, sizeof(g_device_id));
    g_device_id[sizeof(g_device_id) - 1] = '\0';
  } else {
    g_device_id[0] = '\0';
  }
  init_sender_statuses();
  reset_batch_rx();
  g_receiver_rx_reject_reason = RxRejectReason::None;
  g_receiver_rx_reject_log_ms = 0;
  return true;
}

void ReceiverPipeline::loop() {
  if (!g_shared) {
    return;
  }
  receiver_loop();
}

ReceiverStats ReceiverPipeline::stats() const {
  ReceiverStats stats = {};
  if (!g_shared) {
    return stats;
  }
  stats.receiver_decode_fail = g_receiver_faults.decode_fail;
  stats.receiver_lora_tx_fail = g_receiver_faults.lora_tx_fail;
  stats.last_rx_reject = g_receiver_rx_reject_reason;
  stats.receiver_discovery_sent = g_receiver_discovery_sent;
  return stats;
}