// Copyright(c) 2015-present, Gabi Melman, mguludag and spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)

#pragma once

//
// Custom sink for QPlainTextEdit or QTextEdit and its children(QTextBrowser...
// etc) Building and using requires Qt library.
//

#include "thirdparty/spdlog/include/spdlog/common.h"
#include "thirdparty/spdlog/include/spdlog/details/log_msg.h"
#include "thirdparty/spdlog/include/spdlog/details/synchronous_factory.h"
#include "thirdparty/spdlog/include/spdlog/sinks/base_sink.h"

#include <QObject>
#include <QPlainTextEdit>
#include <QTextEdit>

namespace _spdlog_p {
namespace _sinks_p {
//
// Private class for QTextEdit and its derivatives
//
class qtextedit_sink_p : public QObject {
  Q_OBJECT
public:
  qtextedit_sink_p(QTextEdit *textedit = nullptr) {
    if (textedit != nullptr) {
      textedit_ = textedit;
      connect(this, &qtextedit_sink_p::append_text, textedit_,
              &QTextEdit::append);
    }
  }

  ~qtextedit_sink_p() {}

  void append(const spdlog::string_view_t &str) {
    emit append_text(
        QString::fromUtf8(str.data(), static_cast<int>(str.size() - 2)));
  }

signals:
  void append_text(const QString &);

private:
  QTextEdit *textedit_ = nullptr;
};

//
// Private class for QPlainTextEdit
//
class qplaintextedit_sink_p : public QObject {
  Q_OBJECT
public:
  qplaintextedit_sink_p(QPlainTextEdit *textedit = nullptr) {
    if (textedit != nullptr) {
      textedit_ = textedit;
      connect(this, &qplaintextedit_sink_p::append_text, textedit_,
              &QPlainTextEdit::appendPlainText);
    }
  }

  ~qplaintextedit_sink_p() {}

  void append(const spdlog::string_view_t &str) {
    emit append_text(
        QString::fromUtf8(str.data(), static_cast<int>(str.size() - 2)));
  }

signals:
  void append_text(const QString &);

private:
  QPlainTextEdit *textedit_ = nullptr;
};
} // namespace _sinks_p
} // namespace _spdlog_p

//
// qtextedit_sink class
//
namespace spdlog {
namespace sinks {
template <typename Mutex> class qtextedit_sink : public base_sink<Mutex> {
public:
  qtextedit_sink(QTextEdit *textedit = nullptr) {
    if (textedit != nullptr) {
      textedit_p =
          std::make_shared<_spdlog_p::_sinks_p::qtextedit_sink_p>(textedit);
    } else {
      throw spdlog_ex("Error opening QTextEdit");
    }
  }

  ~qtextedit_sink() { flush_(); }

protected:
  void sink_it_(const details::log_msg &msg) override {
    memory_buf_t formatted;
    base_sink<Mutex>::formatter_->format(msg, formatted);
    string_view_t str_v = string_view_t(formatted.data(), formatted.size());
    textedit_p->append(str_v);
  }

  void flush_() override {}

private:
  std::shared_ptr<_spdlog_p::_sinks_p::qtextedit_sink_p> textedit_p = nullptr;
};

//
// qplaintextedit_sink class
//
template <typename Mutex> class qplaintextedit_sink : public base_sink<Mutex> {
public:
  qplaintextedit_sink(QPlainTextEdit *textedit = nullptr) {
    if (textedit != nullptr) {
      textedit_p = std::make_shared<_spdlog_p::_sinks_p::qplaintextedit_sink_p>(
          textedit);
    } else {
      throw spdlog_ex("Error opening QPlainTextEdit");
    }
  }

  ~qplaintextedit_sink() { flush_(); }

protected:
  void sink_it_(const details::log_msg &msg) override {
    memory_buf_t formatted;
    base_sink<Mutex>::formatter_->format(msg, formatted);
    string_view_t str_v = string_view_t(formatted.data(), formatted.size());
    textedit_p->append(str_v);
  }

  void flush_() override {}

private:
  std::shared_ptr<_spdlog_p::_sinks_p::qplaintextedit_sink_p> textedit_p =
      nullptr;
};

#include "spdlog/details/null_mutex.h"
#include <mutex>
using qtextedit_sink_mt = qtextedit_sink<std::mutex>;
using qtextedit_sink_st = qtextedit_sink<spdlog::details::null_mutex>;

using qplaintextedit_sink_mt = qplaintextedit_sink<std::mutex>;
using qplaintextedit_sink_st = qplaintextedit_sink<spdlog::details::null_mutex>;

} // namespace sinks

//
// Factory functions
//
template <typename Factory = spdlog::synchronous_factory>
inline std::shared_ptr<logger>
qtextedit_logger_mt(const std::string &logger_name,
                    QTextEdit *qtextedit = nullptr) {
  return Factory::template create<sinks::qtextedit_sink_mt>(logger_name,
                                                            qtextedit);
}

template <typename Factory = spdlog::synchronous_factory>
inline std::shared_ptr<logger>
qtextedit_logger_st(const std::string &logger_name,
                    QTextEdit *qtextedit = nullptr) {
  return Factory::template create<sinks::qtextedit_sink_st>(logger_name,
                                                            qtextedit);
}

template <typename Factory = spdlog::synchronous_factory>
inline std::shared_ptr<logger>
qplaintextedit_logger_mt(const std::string &logger_name,
                         QPlainTextEdit *qplaintextedit = nullptr) {
  return Factory::template create<sinks::qplaintextedit_sink_mt>(
      logger_name, qplaintextedit);
}

template <typename Factory = spdlog::synchronous_factory>
inline std::shared_ptr<logger>
qplaintextedit_logger_st(const std::string &logger_name,
                         QPlainTextEdit *qplaintextedit = nullptr) {
  return Factory::template create<sinks::qplaintextedit_sink_st>(
      logger_name, qplaintextedit);
}
} // namespace spdlog
