#include "client_handler.h"

#include "esp_log.h"
#include "freertos/task.h"
#include <stdbool.h>
#include <stdint.h>
#include <string.h>

int get_client_id(ClientList *list, const uint8_t *client_mac) {
  for (int i = 0; i < MAX_CLIENTS; i++) {
    if (memcmp(client_mac, list->Clients[i].macAddr, MAC_LENGTH) == 0) {
      return i;
    }
  }
  return CLIENT_DOES_NOT_EXISTS;
}

// TODO: Sanity check when list full then list->count should be MAX_CLIENTS
int get_next_free_slot(ClientList *list) {
  for (int i = 0; i < MAX_CLIENTS; i++) {
    // if slot is not used return index
    if (!list->Clients[i].slotIsUsed) {
      return i;
    }
  }
  // list is full
  return CLIENT_LIST_FULL;
}

int add_client(ClientList *list, const uint8_t *client_mac) {
  if (get_client_id(list, client_mac) >= 0) {
    // Client already exists dont add to list
    return CLIENT_EXISTS;
  }

  int slot = get_next_free_slot(list);
  if (slot < 0) {
    // Client list full
    return CLIENT_LIST_FULL;
  }

  list->Clients[slot].slotIsUsed = true;
  list->Clients[slot].isAvailable = true;
  list->Clients[slot].last_seen = xTaskGetTickCount();
  list->Clients[slot].retry_counter = 0;
  memcpy(list->Clients[slot].macAddr, client_mac, MAC_LENGTH);
  list->ClientCount++;
  return CLIENT_OK;
}

int remove_client(ClientList *list, const uint8_t client_id) {
  if (client_id >= MAX_CLIENTS)
    return CLIENT_INVALID_ID; // invalid index
  list->Clients[client_id].slotIsUsed = false;
  list->ClientCount--;
  return CLIENT_OK;
}