/*
  Copyright <2018-2022> <scott.e.graves@protonmail.com>

  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
  associated documentation files (the "Software"), to deal in the Software without restriction,
  including without limitation the rights to use, copy, modify, merge, publish, distribute,
  sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all copies or
  substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
  NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
  OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef INCLUDE_APP_CONFIG_HPP_
#define INCLUDE_APP_CONFIG_HPP_

#include "common.hpp"
#include "events/events.hpp"
#include "events/event_system.hpp"
#include "types/repertory.hpp"
#include "types/skynet.hpp"

namespace repertory {
class app_config final {
public:
  static std::string default_agent_name(const provider_type &pt);

  static std::uint16_t default_api_port(const provider_type &pt);

  static std::string default_data_directory(const provider_type &pt);

  static std::uint16_t default_rpc_port(const provider_type &pt);

  static std::string get_provider_api_password(const provider_type &pt);

  static std::string get_provider_display_name(const provider_type &pt);

  static std::string get_provider_minimum_version(const provider_type &pt);

  static std::string get_provider_name(const provider_type &pt);

  static std::string get_provider_path_name(const provider_type &pt);

public:
  explicit app_config(const provider_type &pt, const std::string &data_directory = "");

  ~app_config() { save(); }

private:
  const provider_type pt_;
  std::string api_auth_;
  std::uint16_t api_port_;
  std::string api_user_;
  bool config_changed_;
  const std::string data_directory_;
  std::uint8_t download_timeout_secs_;
  bool enable_chunk_downloader_timeout_;
  bool enable_comm_duration_events_;
  bool enable_drive_events_;
  bool enable_max_cache_size_;
#ifdef _WIN32
  bool enable_mount_manager_;
#endif
  bool enable_remote_mount_;
  event_level event_level_;
  std::uint32_t eviction_delay_mins_;
  bool eviction_uses_accessed_time_;
  std::uint8_t high_freq_interval_secs_;
  bool is_remote_mount_;
  std::uint32_t low_freq_interval_secs_;
  std::uint64_t max_cache_size_bytes_;
  std::uint8_t max_upload_count_;
  std::uint8_t min_download_timeout_secs_;
  double minimum_redundancy_;
  std::uint16_t online_check_retry_secs_;
  std::uint16_t orphaned_file_retention_days_;
  std::string preferred_download_type_;
  std::uint8_t read_ahead_count_;
  std::uint8_t remote_client_pool_size_;
  std::string remote_host_name_or_ip_;
  std::uint8_t remote_max_connections_;
  std::uint16_t remote_port_;
  std::uint16_t remote_receive_timeout_secs_;
  std::uint16_t remote_send_timeout_secs_;
  std::string remote_token_;
  std::uint16_t retry_read_count_;
  std::uint16_t ring_buffer_file_size_;
  api_currency storage_byte_month_;
  std::uint64_t version_ = REPERTORY_CONFIG_VERSION;
  std::string cache_directory_;
  host_config hc_;
  s3_config s3_config_;
  skynet_config skynet_config_;
  std::string log_directory_;
  std::recursive_mutex read_write_mutex_;
  std::recursive_mutex remote_mount_mutex_;

private:
  bool load();

  template <typename dest>
  bool get_value(const json &json_document, const std::string &name, dest &dst,
                 bool &success_flag) {
    auto ret = false;
    try {
      if (json_document.find(name) != json_document.end()) {
        dst = json_document[name].get<dest>();
        ret = true;
      } else {
        success_flag = false;
      }
    } catch (const json::exception &ex) {
      event_system::instance().raise<repertory_exception>(__FUNCTION__, ex.what());
      success_flag = false;
      ret = false;
    }

    return ret;
  }

  template <typename dest, typename source> bool set_value(dest &dst, const source &src) {
    auto ret = false;
    recur_mutex_lock l(read_write_mutex_);
    if (dst != src) {
      dst = src;
      config_changed_ = true;
      save();
      ret = true;

      if (reinterpret_cast<void *>(&dst) == &skynet_config_.portal_list) {
        event_system::instance().raise<skynet_portal_list_changed>();
      }
    }

    return ret;
  }

public:
  std::string get_api_auth() const { return api_auth_; }

  std::uint16_t get_api_port() const { return api_port_; }

  std::string get_api_user() const { return api_user_; }

  std::string get_cache_directory() const { return cache_directory_; }

  std::uint8_t get_chunk_downloader_timeout_secs() const {
    return std::max(min_download_timeout_secs_, download_timeout_secs_);
  }

  std::string get_config_file_path() const;

  std::string get_data_directory() const { return data_directory_; }

  bool get_enable_chunk_download_timeout() const { return enable_chunk_downloader_timeout_; }

  bool get_enable_comm_duration_events() const { return enable_comm_duration_events_; }

  bool get_enable_drive_events() const { return enable_drive_events_; }

#ifdef _WIN32
  bool get_enable_mount_manager() const { return enable_mount_manager_; }
#endif

  bool get_enable_max_cache_size() const { return enable_max_cache_size_; }

  bool get_enable_remote_mount() const { return enable_remote_mount_; }

  event_level get_event_level() const { return event_level_; }

  std::uint32_t get_eviction_delay_mins() const { return eviction_delay_mins_; }

  bool get_eviction_uses_accessed_time() const { return eviction_uses_accessed_time_; }

  std::uint8_t get_high_frequency_interval_secs() const {
    return std::max((std::uint8_t)1, high_freq_interval_secs_);
  }

  host_config get_host_config() const { return hc_; }

  bool get_is_remote_mount() const { return is_remote_mount_; }

  json get_json() const;

  std::string get_log_directory() const { return log_directory_; }

  std::uint32_t get_low_frequency_interval_secs() const {
    return std::max((std::uint32_t)1, low_freq_interval_secs_);
  }

  std::uint64_t get_max_cache_size_bytes() const;

  std::uint8_t get_max_upload_count() const {
    return std::max(std::uint8_t(1u), max_upload_count_);
  }

  double get_minimum_redundancy() const { return std::max(1.5, minimum_redundancy_); }

  std::uint16_t get_online_check_retry_secs() const {
    return std::max(std::uint16_t(15), online_check_retry_secs_);
  }

  std::uint16_t get_orphaned_file_retention_days() const {
    return std::min((std::uint16_t)31, std::max((std::uint16_t)1, orphaned_file_retention_days_));
  }

  download_type get_preferred_download_type() const {
    return utils::download_type_from_string(preferred_download_type_, download_type::fallback);
  }

  provider_type get_provider_type() const { return pt_; }

  std::uint8_t get_read_ahead_count() const { return std::max((std::uint8_t)1, read_ahead_count_); }

  std::uint8_t get_remote_client_pool_size() const {
    return std::max((std::uint8_t)5u, remote_client_pool_size_);
  }

  std::string get_remote_host_name_or_ip() const { return remote_host_name_or_ip_; }

  std::uint8_t get_remote_max_connections() const {
    return std::max((std::uint8_t)1, remote_max_connections_);
  }

  std::uint16_t get_remote_port() const { return remote_port_; }

  std::uint16_t get_remote_receive_timeout_secs() const { return remote_receive_timeout_secs_; }

  std::uint16_t get_remote_send_timeout_secs() const { return remote_send_timeout_secs_; }

  std::string get_remote_token() const { return remote_token_; }

  std::uint16_t get_retry_read_count() const {
    return std::max(std::uint16_t(2), retry_read_count_);
  }

  std::uint16_t get_ring_buffer_file_size() const {
    return std::max((std::uint16_t)64, std::min((std::uint16_t)1024, ring_buffer_file_size_));
  }

  s3_config get_s3_config() const { return s3_config_; }

  skynet_config get_skynet_config() const { return skynet_config_; }

  api_currency get_storage_byte_month() const { return storage_byte_month_; }

  std::string get_value_by_name(const std::string &name);

  std::uint64_t get_version() const { return version_; }

  void save();

  void set_api_auth(const std::string &api_auth) { set_value(api_auth_, api_auth); }

  void set_api_port(const std::uint16_t &api_port) { set_value(api_port_, api_port); }

  void set_api_user(const std::string &api_user) { set_value(api_user_, api_user); }

  void set_chunk_downloader_timeout_secs(const std::uint8_t &chunk_downloader_timeout_secs) {
    set_value(download_timeout_secs_, chunk_downloader_timeout_secs);
  }

  void set_enable_chunk_downloader_timeout(const bool &enable_chunk_downloader_timeout) {
    set_value(enable_chunk_downloader_timeout_, enable_chunk_downloader_timeout);
  }

  void set_enable_comm_duration_events(const bool &enable_comm_duration_events) {
    set_value(enable_comm_duration_events_, enable_comm_duration_events);
  }

  void set_enable_drive_events(const bool &enable_drive_events) {
    set_value(enable_drive_events_, enable_drive_events);
  }

  void set_enable_max_cache_size(const bool &enable_max_cache_size) {
    set_value(enable_max_cache_size_, enable_max_cache_size);
  }

#ifdef _WIN32
  void set_enable_mount_manager(const bool &enable_mount_manager) {
    set_value(enable_mount_manager_, enable_mount_manager);
  }
#endif

  void set_enable_remote_mount(const bool &enable_remote_mount);

  void set_event_level(const event_level &level) {
    if (set_value(event_level_, level)) {
      event_system::instance().raise<event_level_changed>(event_level_to_string(level));
    }
  }

  void set_eviction_delay_mins(const std::uint32_t &eviction_delay_mins) {
    set_value(eviction_delay_mins_, eviction_delay_mins);
  }

  void set_eviction_uses_accessed_time(const bool &eviction_uses_accessed_time) {
    set_value(eviction_uses_accessed_time_, eviction_uses_accessed_time);
  }

  void set_high_frequency_interval_secs(const std::uint8_t &high_frequency_interval_secs) {
    set_value(high_freq_interval_secs_, high_frequency_interval_secs);
  }

  void set_is_remote_mount(const bool &is_remote_mount);

  void set_low_frequency_interval_secs(const std::uint32_t &low_frequency_interval_secs) {
    set_value(low_freq_interval_secs_, low_frequency_interval_secs);
  }

  void set_max_cache_size_bytes(const std::uint64_t &max_cache_size_bytes) {
    set_value(max_cache_size_bytes_, max_cache_size_bytes);
  }

  void set_max_upload_count(const std::uint8_t &max_upload_count) {
    set_value(max_upload_count_, max_upload_count);
  }

  void set_minimum_redundancy(const double &minimum_redundancy) {
    set_value(minimum_redundancy_, minimum_redundancy);
  }

  void set_online_check_retry_secs(const std::uint16_t &online_check_retry_secs) {
    set_value(online_check_retry_secs_, online_check_retry_secs);
  }

  void set_orphaned_file_retention_days(const std::uint16_t &orphaned_file_retention_days) {
    set_value(orphaned_file_retention_days_, orphaned_file_retention_days);
  }

  void set_preferred_download_type(const download_type &dt) {
    set_value(preferred_download_type_, utils::download_type_to_string(dt));
  }

  void set_read_ahead_count(const std::uint8_t &read_ahead_count) {
    set_value(read_ahead_count_, read_ahead_count);
  }

  void set_remote_client_pool_size(const std::uint8_t &remote_client_pool_size) {
    set_value(remote_client_pool_size_, remote_client_pool_size);
  }

  void set_ring_buffer_file_size(const std::uint16_t &ring_buffer_file_size) {
    set_value(ring_buffer_file_size_, ring_buffer_file_size);
  }

  void set_remote_host_name_or_ip(const std::string &remote_host_name_or_ip) {
    set_value(remote_host_name_or_ip_, remote_host_name_or_ip);
  }

  void set_remote_max_connections(const std::uint8_t &remote_max_connections) {
    set_value(remote_max_connections_, remote_max_connections);
  }

  void set_remote_port(const std::uint16_t &remote_port) { set_value(remote_port_, remote_port); }

  void set_remote_receive_timeout_secs(const std::uint16_t &remote_receive_timeout_secs) {
    set_value(remote_receive_timeout_secs_, remote_receive_timeout_secs);
  }

  void set_remote_send_timeout_secs(const std::uint16_t &remote_send_timeout_secs) {
    set_value(remote_send_timeout_secs_, remote_send_timeout_secs);
  }

  void set_remote_token(const std::string &remote_token) { set_value(remote_token_, remote_token); }

  void set_retry_read_count(const std::uint16_t &retry_read_count) {
    set_value(retry_read_count_, retry_read_count);
  }

  void set_storage_byte_month(const api_currency &storage_byte_month);

  std::string set_value_by_name(const std::string &name, const std::string &value);
};
} // namespace repertory

#endif // INCLUDE_APP_CONFIG_HPP_