/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file LICENSE.rst or https://cmake.org/licensing for details.  */
#pragma once

#include "cmConfigure.h" // IWYU pragma: keep

#include "cmCMakePresetsGraph.h"
#include "cmDiagnostics.h"
#include "cmake.h"

#ifdef _MSC_VER
#  pragma warning(disable : 4127)
#  pragma warning(disable : 4512)
#endif

#include <memory>
#include <vector>

#include <QAtomicInt>
#include <QList>
#include <QMetaType>
#include <QObject>
#include <QProcessEnvironment>
#include <QString>
#include <QStringList>
#include <QTimer>
#include <QVariant>

#include "QCMakePreset.h"

/// struct to represent cmake properties in Qt
/// Value is of type String or Bool
struct QCMakeProperty
{
  enum PropertyType
  {
    BOOL,
    PATH,
    FILEPATH,
    STRING
  };
  QString Key;
  QVariant Value;
  QStringList Strings;
  QString Help;
  PropertyType Type;
  bool Advanced;
  bool operator==(QCMakeProperty const& other) const
  {
    return this->Key == other.Key;
  }
  bool operator<(QCMakeProperty const& other) const
  {
    return this->Key < other.Key;
  }
};

// list of properties
using QCMakePropertyList = QList<QCMakeProperty>;

// allow QVariant to be a property or list of properties
Q_DECLARE_METATYPE(QCMakeProperty)
Q_DECLARE_METATYPE(QCMakePropertyList)
Q_DECLARE_METATYPE(QProcessEnvironment)

/// Qt API for CMake library.
/// Wrapper like class allows for easier integration with
/// Qt features such as, signal/slot connections, multi-threading, etc..
class QCMake : public QObject
{
  Q_OBJECT
public:
  QCMake(QObject* p = nullptr);
  ~QCMake();
public slots:
  /// load the cache file in a directory
  void loadCache(QString const& dir);
  /// set the source directory containing the source
  void setSourceDirectory(QString const& dir);
  /// set the binary directory to build in
  void setBinaryDirectory(QString const& dir);
  /// set the preset name to use
  void setPreset(QString const& name, bool setBinary = true);
  /// set the desired generator to use
  void setGenerator(QString const& generator);
  /// set the desired generator to use
  void setPlatform(QString const& platform);
  /// set the desired generator to use
  void setToolset(QString const& toolset);
  /// set the configure and generate environment
  void setEnvironment(QProcessEnvironment const& environment);
  /// do the configure step
  void configure();
  /// generate the files
  void generate();
  /// open the project
  void open();
  /// set the property values
  void setProperties(QCMakePropertyList const&);
  /// interrupt the configure or generate process (if connecting, make a direct
  /// connection)
  void interrupt();
  /// delete the cache in binary directory
  void deleteCache();
  /// reload the cache in binary directory
  void reloadCache();
  /// set whether to do debug output
  void setDebugOutput(bool);
  /// set diagnostic action
  void setDiagnosticAction(cmDiagnostics::DiagnosticCategory,
                           cmDiagnostics::DiagnosticAction);
  /// check if project IDE open is possible and emit openPossible signal
  void checkOpenPossible();
  /// Reload the presets files and tree
  void loadPresets();

public:
  /// get the list of cache properties
  QCMakePropertyList properties() const;
  /// get the current binary directory
  QString binaryDirectory() const;
  /// get the current binary directory, possibly a relative path
  QString relativeBinaryDirectory() const;
  /// get the current source directory
  QString sourceDirectory() const;
  /// get the current generator
  QString generator() const;
  /// get the configure and generate environment
  QProcessEnvironment environment() const;
  /// get the available generators
  std::vector<cmake::GeneratorInfo> const& availableGenerators() const;
  /// get whether to do debug output
  bool getDebugOutput() const;
  /// get diagnostic action
  cmDiagnosticAction getDiagnosticAction(cmDiagnosticCategory) const;

signals:
  /// signal when properties change (during read from disk or configure
  /// process)
  void propertiesChanged(QCMakePropertyList const& vars);
  /// signal when the generator changes
  void generatorChanged(QString const& gen);
  /// signal when the source directory changes (binary directory already
  /// containing a CMakeCache.txt file)
  void sourceDirChanged(QString const& dir);
  /// signal when the binary directory changes
  void binaryDirChanged(QString const& dir);
  /// signal when the preset list changes
  void presetsChanged(QVector<QCMakePreset> const& presets);
  /// signal when the selected preset changes
  void presetChanged(QString const& name);
  /// signal when there's an error reading the presets files
  void presetLoadError(QString const& dir, QString const& error);
  /// signal for progress events
  void progressChanged(QString const& msg, float percent);
  /// signal when configure is done
  void configureDone(int error);
  /// signal when generate is done
  void generateDone(int error);
  /// signal when there is an output message
  void outputMessage(QString const& msg);
  /// signal when there is an error message
  void errorMessage(QString const& msg);
  /// signal when debug output changes
  void debugOutputChanged(bool);
  /// signal when the toolset changes
  void toolsetChanged(QString const& toolset);
  /// signal when the platform changes
  void platformChanged(QString const& platform);
  /// signal when open is done
  void openDone(bool successful);
  /// signal when open is done
  void openPossible(bool possible);

protected:
  std::unique_ptr<cmake> CMakeInstance;

  bool interruptCallback();
  void progressCallback(std::string const& msg, float percent);
  void messageCallback(std::string const& msg, char const* title);
  void stdoutCallback(std::string const& msg);
  void stderrCallback(std::string const& msg);
  void setUpEnvironment() const;

  QString SourceDirectory;
  QString BinaryDirectory;
  QString MaybeRelativeBinaryDirectory;
  QString Generator;
  QString Platform;
  QString Toolset;
  std::vector<cmake::GeneratorInfo> AvailableGenerators;
  cmCMakePresetsGraph CMakePresetsGraph;
  QString PresetName;
  QString CMakeExecutable;
  QAtomicInt InterruptFlag;
  QProcessEnvironment StartEnvironment;
  QProcessEnvironment Environment;
};
