#include "Client.hh"

#include <errno.h>
#include <event2/buffer.h>
#include <event2/bufferevent.h>
#include <event2/event.h>
#include <string.h>
#include <unistd.h>

#include <atomic>
#include <phosg/Network.hh>
#include <phosg/Time.hh>

#include "Loggers.hh"
#include "Version.hh"

using namespace std;

const uint64_t CLIENT_CONFIG_MAGIC = 0x492A890E82AC9839;

static atomic<uint64_t> next_id(1);

ClientOptions::ClientOptions()
    : switch_assist(false),
      infinite_hp(false),
      infinite_tp(false),
      debug(false),
      override_section_id(-1),
      override_lobby_event(-1),
      override_lobby_number(-1),
      override_random_seed(-1),
      save_files(false),
      enable_chat_commands(true),
      enable_chat_filter(true),
      enable_player_notifications(false),
      suppress_remote_login(false),
      zero_remote_guild_card(false),
      ep3_infinite_meseta(false),
      red_name(false),
      blank_name(false),
      function_call_return_value(-1) {}

Client::Client(
    struct bufferevent* bev,
    GameVersion version,
    ServerBehavior server_behavior)
    : id(next_id++),
      log("", client_log.min_level),
      bb_game_state(0),
      flags(flags_for_version(version, -1)),
      channel(bev, version, nullptr, nullptr, this, string_printf("C-%" PRIX64, this->id), TerminalFormat::FG_YELLOW, TerminalFormat::FG_GREEN),
      server_behavior(server_behavior),
      should_disconnect(false),
      should_send_to_lobby_server(false),
      should_send_to_proxy_server(false),
      proxy_destination_address(0),
      proxy_destination_port(0),
      x(0.0f),
      z(0.0f),
      area(0),
      lobby_id(0),
      lobby_client_id(0),
      lobby_arrow_color(0),
      preferred_lobby_id(-1),
      save_game_data_event(
          event_new(
              bufferevent_get_base(bev), -1, EV_TIMEOUT | EV_PERSIST,
              &Client::dispatch_save_game_data, this),
          event_free),
      card_battle_table_number(-1),
      card_battle_table_seat_number(0),
      card_battle_table_seat_state(0),
      next_exp_value(0),
      can_chat(true),
      pending_bb_save_player_index(0),
      dol_base_addr(0) {
  this->last_switch_enabled_command.header.subcommand = 0;
  memset(&this->next_connection_addr, 0, sizeof(this->next_connection_addr));

  if (this->version() == GameVersion::BB) {
    struct timeval tv = usecs_to_timeval(60000000); // 1 minute
    event_add(this->save_game_data_event.get(), &tv);
  }
}

Client::~Client() {
  if (!this->disconnect_hooks.empty()) {
    this->log.warning("Disconnect hooks pending at client destruction time:");
    for (const auto& it : this->disconnect_hooks) {
      this->log.warning("  %s", it.first.c_str());
    }
  }
}

void Client::set_license(shared_ptr<const License> l) {
  this->license = l;
  this->game_data.guild_card_number = this->license->serial_number;
  if (this->version() == GameVersion::BB) {
    this->game_data.bb_username = this->license->username;
  }
}

ClientConfig Client::export_config() const {
  ClientConfig cc;
  cc.magic = CLIENT_CONFIG_MAGIC;
  cc.flags = this->flags;
  cc.proxy_destination_address = this->proxy_destination_address;
  cc.proxy_destination_port = this->proxy_destination_port;
  cc.unused.clear(0xFF);
  return cc;
}

ClientConfigBB Client::export_config_bb() const {
  ClientConfigBB cc;
  cc.cfg = this->export_config();
  cc.bb_game_state = this->bb_game_state;
  cc.bb_player_index = this->game_data.bb_player_index;
  cc.unused.clear(0xFF);
  return cc;
}

void Client::import_config(const ClientConfig& cc) {
  if (cc.magic != CLIENT_CONFIG_MAGIC) {
    throw invalid_argument("invalid client config");
  }
  this->flags = cc.flags;
  this->proxy_destination_address = cc.proxy_destination_address;
  this->proxy_destination_port = cc.proxy_destination_port;
}

void Client::import_config(const ClientConfigBB& cc) {
  this->import_config(cc.cfg);
  this->bb_game_state = cc.bb_game_state;
  this->game_data.bb_player_index = cc.bb_player_index;
}

void Client::dispatch_save_game_data(evutil_socket_t, short, void* ctx) {
  reinterpret_cast<Client*>(ctx)->save_game_data();
}

void Client::save_game_data() {
  if (this->version() != GameVersion::BB) {
    throw logic_error("save_game_data called for non-BB client");
  }
  if (this->game_data.account(false)) {
    this->game_data.save_account_data();
  }
  if (this->game_data.player(false)) {
    this->game_data.save_player_data();
  }
}