// Copyright 2026 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include "DualShockUDPSettings.h"

#include <fmt/format.h>

#include "Common/Config/Config.h"
#include "Common/StringUtil.h"
#include "InputCommon/ControllerInterface/DualShockUDPClient/DualShockUDPClient.h"

namespace
{
std::string SerializeServer(DualShockUDPServer server)
{
  return fmt::format("{}{}{}{}{}{}", server.description, DualShockUDPSettings::FIELD_SEPARATOR,
                     server.server_address, DualShockUDPSettings::FIELD_SEPARATOR,
                     server.server_port, DualShockUDPSettings::SERVER_SEPARATOR);
}

void MigrateIfNeeded()
{
  const auto server_address_setting =
      Config::Get(ciface::DualShockUDPClient::Settings::SERVER_ADDRESS);
  const auto server_port_setting = Config::Get(ciface::DualShockUDPClient::Settings::SERVER_PORT);

  // Update our servers setting if the user is using old configuration
  if (!server_address_setting.empty() && server_port_setting != 0)
  {
    const auto& servers_setting = Config::Get(ciface::DualShockUDPClient::Settings::SERVERS);
    Config::SetBaseOrCurrent(ciface::DualShockUDPClient::Settings::SERVERS,
                             servers_setting +
                                 SerializeServer(DualShockUDPServer("DS4", server_address_setting,
                                                                    server_port_setting)));
    Config::SetBase(ciface::DualShockUDPClient::Settings::SERVER_ADDRESS, "");
    Config::SetBase(ciface::DualShockUDPClient::Settings::SERVER_PORT, 0);
  }
}
}  // Anonymous namespace

namespace DualShockUDPSettings
{
std::vector<DualShockUDPServer> GetServers()
{
  MigrateIfNeeded();

  const auto& servers_setting = Config::Get(ciface::DualShockUDPClient::Settings::SERVERS);
  const auto server_details = SplitString(servers_setting, SERVER_SEPARATOR);

  std::vector<DualShockUDPServer> result;
  for (const std::string& server_detail : server_details)
  {
    const auto server_info = SplitString(server_detail, FIELD_SEPARATOR);
    if (server_info.size() < 3)
      continue;

    int port;
    if (TryParse(server_info[2], &port))
    {
      result.push_back(DualShockUDPServer(server_info[0], server_info[1], port));
    }
  }

  return result;
}

void AddServer(DualShockUDPServer server)
{
  MigrateIfNeeded();

  const auto& servers_setting = Config::Get(ciface::DualShockUDPClient::Settings::SERVERS);
  Config::SetBaseOrCurrent(ciface::DualShockUDPClient::Settings::SERVERS,
                           servers_setting + SerializeServer(server));
}

void ReplaceServer(size_t index, DualShockUDPServer server)
{
  MigrateIfNeeded();

  const auto& servers_setting = Config::Get(ciface::DualShockUDPClient::Settings::SERVERS);
  const auto server_details = SplitString(servers_setting, SERVER_SEPARATOR);

  std::string new_servers_setting;
  for (size_t i = 0; i < server_details.size(); i++)
  {
    if (i == index)
    {
      new_servers_setting += SerializeServer(server);
    }
    else
    {
      new_servers_setting += server_details[i] + SERVER_SEPARATOR;
    }
  }

  Config::SetBaseOrCurrent(ciface::DualShockUDPClient::Settings::SERVERS, new_servers_setting);
}

void RemoveServer(size_t index)
{
  MigrateIfNeeded();

  const auto& servers_setting = Config::Get(ciface::DualShockUDPClient::Settings::SERVERS);
  const auto server_details = SplitString(servers_setting, SERVER_SEPARATOR);

  std::string new_servers_setting;
  for (size_t i = 0; i < server_details.size(); i++)
  {
    if (i == index)
    {
      continue;
    }

    new_servers_setting += server_details[i] + SERVER_SEPARATOR;
  }

  Config::SetBaseOrCurrent(ciface::DualShockUDPClient::Settings::SERVERS, new_servers_setting);
}

bool IsEnabled()
{
  return Config::Get(ciface::DualShockUDPClient::Settings::SERVERS_ENABLED);
}

void SetEnabled(bool enabled)
{
  Config::SetBaseOrCurrent(ciface::DualShockUDPClient::Settings::SERVERS_ENABLED, enabled);
}
}  // namespace DualShockUDPSettings