/*
 * LibrePCB - Professional EDA for everyone!
 * Copyright (C) 2013 LibrePCB Developers, see AUTHORS.md for contributors.
 * https://librepcb.org/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef LIBREPCB_CORE_GRAPHICSLAYER_H
#define LIBREPCB_CORE_GRAPHICSLAYER_H

/*******************************************************************************
 *  Includes
 ******************************************************************************/
#include "../utils/signalslot.h"
#include "graphicslayername.h"

#include <QtCore>
#include <QtWidgets>

#include <memory>

/*******************************************************************************
 *  Namespace / Forward Declarations
 ******************************************************************************/
namespace librepcb {

/*******************************************************************************
 *  Class GraphicsLayer
 ******************************************************************************/

/**
 * @brief The GraphicsLayer class represents a graphical layer used in
 * schematics and boards
 *
 * These layers are used in graphics items (QGraphicsItem) to determine their
 * visibility and colors.
 */
class GraphicsLayer : public QObject {
  Q_OBJECT

public:
  // clang-format off

  // schematic layers
  //static constexpr const char* sSchematicBackground     = "sch_background";         ///< Primary: background | Secondary: grid
  //static constexpr const char* sSchematicSelection      = "sch_selection";          ///< Primary: outline    | Secondary: area
  static constexpr const char* sSchematicReferences     = "sch_references";         ///< origin crosses of symbols, texts, ...
  static constexpr const char* sSchematicSheetFrames    = "sch_scheet_frames";      ///< e.g. A4 sheet frame + text boxes
  static constexpr const char* sSchematicNetLines       = "sch_net_lines";          ///< librepcb::SI_NetLine
  static constexpr const char* sSchematicNetLabels      = "sch_net_labels";         ///< librepcb::SI_NetLabel
  static constexpr const char* sSchematicNetLabelAnchors= "sch_net_label_anchors";  ///< anchor line of librepcb::SI_NetLabel
  static constexpr const char* sSchematicDocumentation  = "sch_documentation";      ///< for documentation purposes, e.g. text
  static constexpr const char* sSchematicComments       = "sch_comments";           ///< for personal comments, e.g. text
  static constexpr const char* sSchematicGuide          = "sch_guide";              ///< e.g. for boxes around circuits

  // symbol layers
  static constexpr const char* sSymbolOutlines          = "sym_outlines";           ///< dark red lines of symbols
  static constexpr const char* sSymbolGrabAreas         = "sym_grab_areas";         ///< optional yellow area of symbols
  static constexpr const char* sSymbolHiddenGrabAreas   = "sym_hidden_grab_areas";  ///< hidden grab areas of symbols
  static constexpr const char* sSymbolNames             = "sym_names";              ///< text {{NAME}}
  static constexpr const char* sSymbolValues            = "sym_values";             ///< text {{VALUE}}
  static constexpr const char* sSymbolPinCirclesOpt     = "sym_pin_circles_opt";    ///< green circle of unconnected pins
  static constexpr const char* sSymbolPinCirclesReq     = "sym_pin_circles_req";    ///< red circle of unconnected pins
  static constexpr const char* sSymbolPinNames          = "sym_pin_names";          ///< name of the connected component signal
  static constexpr const char* sSymbolPinNumbers        = "sym_pin_numbers";        ///< number of the connected footprint pad

  // asymmetric board layers
  //static constexpr const char* sBoardBackground         = "brd_background";         ///< Primary: background | Secondary: grid
  //static constexpr const char* sBoardSelection          = "brd_selection";          ///< Primary: outline    | Secondary: area
  //static constexpr const char* sBoardReferences         = "brd_references";         ///< origin crosses of footprints, holes, ...
  static constexpr const char* sBoardSheetFrames        = "brd_sheet_frames";       ///< e.g. A4 sheet frame + text boxes
  static constexpr const char* sBoardOutlines           = "brd_outlines";           ///< incl. non-plated through hole milling
  static constexpr const char* sBoardMillingPth         = "brd_milling_pth";        ///< plated through hole milling
  static constexpr const char* sBoardDrillsNpth         = "brd_drills_npth";        ///< non-plated through hole drills
  static constexpr const char* sBoardPadsTht            = "brd_pads_tht";           ///< plated through hole pads
  static constexpr const char* sBoardViasTht            = "brd_vias_tht";           ///< plated through hole vias
  static constexpr const char* sBoardAirWires           = "brd_airwires";           ///< air wires (unconnected)
  static constexpr const char* sBoardMeasures           = "brd_measures";           ///< measurements documentation
  static constexpr const char* sBoardAlignment          = "brd_alignment";          ///< alignment helpers in devices
  static constexpr const char* sBoardDocumentation      = "brd_documentation";      ///< for documentation purposes, e.g. text
  static constexpr const char* sBoardComments           = "brd_comments";           ///< for personal comments, e.g. text
  static constexpr const char* sBoardGuide              = "brd_guide";              ///< e.g. for boxes around circuits

  // symmetric board layers
  static constexpr const char* sTopPlacement            = "top_placement";          ///< placement information (e.g. outline) of devices
  static constexpr const char* sBotPlacement            = "bot_placement";          ///< placement information (e.g. outline) of devices
  static constexpr const char* sTopDocumentation        = "top_documentation";      ///< like placement layers, but not for silk screen
  static constexpr const char* sBotDocumentation        = "bot_documentation";      ///< like placement layers, but not for silk screen
  static constexpr const char* sTopGrabAreas            = "top_grab_areas";         ///< area where devices can be dragged
  static constexpr const char* sBotGrabAreas            = "bot_grab_areas";         ///< area where devices can be dragged
  static constexpr const char* sTopHiddenGrabAreas      = "top_hidden_grab_areas";  ///< hidden area where devices can be dragged
  static constexpr const char* sBotHiddenGrabAreas      = "bot_hidden_grab_areas";  ///< hidden area where devices can be dragged
  static constexpr const char* sTopReferences           = "top_references";         ///< origin crosses of devices
  static constexpr const char* sBotReferences           = "bot_references";         ///< origin crosses of devices
  static constexpr const char* sTopNames                = "top_names";              ///< text, may be used for silk screen
  static constexpr const char* sBotNames                = "bot_names";              ///< text, may be used for silk screen
  static constexpr const char* sTopValues               = "top_values";             ///< text, may be used for silk screen
  static constexpr const char* sBotValues               = "bot_values";             ///< text, may be used for silk screen
  static constexpr const char* sTopCourtyard            = "top_courtyard";          ///< area required to mount devices
  static constexpr const char* sBotCourtyard            = "bot_courtyard";          ///< area required to mount devices
  static constexpr const char* sTopStopMask             = "top_stop_mask";          ///< areas over smt pads
  static constexpr const char* sBotStopMask             = "bot_stop_mask";          ///< areas over smt pads
  static constexpr const char* sTopSolderPaste          = "top_solder_paste";       ///< areas over smt pads
  static constexpr const char* sBotSolderPaste          = "bot_solder_paste";       ///< areas over smt pads
  static constexpr const char* sTopFinish               = "top_finish";             ///< areas of special surface treatments
  static constexpr const char* sBotFinish               = "bot_finish";             ///< areas of special surface treatments
  static constexpr const char* sTopGlue                 = "top_glue";               ///< adhesive for fixing devices
  static constexpr const char* sBotGlue                 = "bot_glue";               ///< adhesive for fixing devices

  // copper layers
  static constexpr const char* sTopCopper               = "top_cu";
  //static constexpr const char* sInnerCopper#            = "in#_cu";
  static constexpr const char* sBotCopper               = "bot_cu";

  // clang-format on

  // Signals
  enum class Event {
    ColorChanged,
    HighlightColorChanged,
    VisibleChanged,
    EnabledChanged,
    Destroyed,
  };
  Signal<GraphicsLayer, Event> onEdited;
  typedef Slot<GraphicsLayer, Event> OnEditedSlot;

  // Constructors / Destructor
  GraphicsLayer() = delete;
  GraphicsLayer(const GraphicsLayer& other) noexcept;
  explicit GraphicsLayer(const QString& name) noexcept;
  virtual ~GraphicsLayer() noexcept;

  // Getters
  const QString& getName() const noexcept { return mName; }
  const QString& getNameTr() const noexcept { return mNameTr; }
  const QColor& getColor(bool highlighted = false) const noexcept {
    return highlighted ? mColorHighlighted : mColor;
  }
  bool getVisible() const noexcept { return mIsVisible; }
  bool isEnabled() const noexcept { return mIsEnabled; }
  bool isVisible() const noexcept { return mIsEnabled && mIsVisible; }
  bool isTopLayer() const noexcept { return isTopLayer(mName); }
  bool isBottomLayer() const noexcept { return isBottomLayer(mName); }
  bool isInnerLayer() const noexcept { return isInnerLayer(mName); }
  bool isCopperLayer() const noexcept { return isCopperLayer(mName); }
  int getInnerLayerNumber() const noexcept {
    return getInnerLayerNumber(mName);
  }
  QString getMirroredLayerName() const noexcept {
    return getMirroredLayerName(mName);
  }
  QString getGrabAreaLayerName() const noexcept {
    return getGrabAreaLayerName(mName);
  }

  // Setters
  void setColor(const QColor& color) noexcept;
  void setColorHighlighted(const QColor& color) noexcept;
  void setVisible(bool visible) noexcept;
  void setEnabled(bool enable) noexcept;

  // Operator Overloadings
  GraphicsLayer& operator=(const GraphicsLayer& rhs) noexcept;

  // Static Methods
  static int getInnerLayerCount() noexcept {
    return 62;
  }  // some random number... ;)
  static bool isBoardLayer(const QString& name) noexcept;
  static bool isTopLayer(const QString& name) noexcept;
  static bool isBottomLayer(const QString& name) noexcept;
  static bool isInnerLayer(const QString& name) noexcept;
  static bool isCopperLayer(const QString& name) noexcept;
  static QString getInnerLayerName(int number) noexcept;
  static int getInnerLayerNumber(const QString& name) noexcept;
  static QString getMirroredLayerName(const QString& name) noexcept;
  static QString getGrabAreaLayerName(const QString& outlineLayerName) noexcept;
  static void getDefaultValues(const QString& name, QString& nameTr,
                               QColor& color, QColor& colorHl,
                               bool& visible) noexcept;

signals:
  void attributesChanged();

protected:  // Data
  QString mName;  ///< Unique name which is used for serialization
  QString mNameTr;  ///< Layer name (translated into the user's language)
  QColor mColor;  ///< Color of graphics items on that layer
  QColor mColorHighlighted;  ///< Color of highlighted graphics items on that
                             ///< layer
  bool mIsVisible;  ///< Visibility of graphics items on that layer
  bool mIsEnabled;  ///< Visibility/availability of the layer itself
};

/*******************************************************************************
 *  Interface IF_GraphicsLayerProvider
 ******************************************************************************/

/**
 * @brief The IF_GraphicsLayerProvider class defines an interface for classes
 * which provide layers
 */
class IF_GraphicsLayerProvider {
public:
  virtual ~IF_GraphicsLayerProvider() {}

  virtual GraphicsLayer* getLayer(const QString& name) const noexcept = 0;
  virtual QList<GraphicsLayer*> getAllLayers() const noexcept = 0;

  GraphicsLayer* getGrabAreaLayer(const QString outlineLayerName) const
      noexcept {
    return getLayer(GraphicsLayer::getGrabAreaLayerName(outlineLayerName));
  }

  QList<GraphicsLayer*> getLayers(const QStringList& layerNames) const
      noexcept {
    QList<GraphicsLayer*> layers;
    foreach (const QString& name, layerNames) {
      GraphicsLayer* layer = getLayer(name);
      if (layer) layers.append(layer);
    }
    return layers;
  }
};

/*******************************************************************************
 *  End of File
 ******************************************************************************/

}  // namespace librepcb

#endif
