////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2012-2020 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave 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.
//
// Octave 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 Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if ! defined (octave_tree_classdef_h)
#define octave_tree_classdef_h 1

#include "octave-config.h"

class octave_value;

#include "comment-list.h"
#include "pt-cmd.h"
#include "pt-exp.h"
#include "pt-walk.h"
#include "pt-id.h"

#include "base-list.h"

#include <list>

namespace octave
{
  class interpreter;

  class tree_superclass_ref : public tree_expression
  {
  public:

    tree_superclass_ref (void) = delete;

    tree_superclass_ref (const std::string& meth, const std::string& cls,
                         int l = -1, int c = -1)
      : tree_expression (l, c), m_method_name (meth), m_class_name (cls)
    { }

    // No copying!

    tree_superclass_ref (const tree_superclass_ref&) = delete;

    tree_superclass_ref& operator = (const tree_superclass_ref&) = delete;

    std::string method_name (void) const
    {
      return m_method_name;
    }

    std::string class_name (void) const { return m_class_name; }

    bool has_magic_end (void) const { return false; }

    tree_superclass_ref * dup (symbol_scope& scope) const;

    octave_value evaluate (tree_evaluator& tw, int nargout = 1)
    {
      octave_value_list retval = evaluate_n (tw, nargout);

      return retval.length () > 0 ? retval(0) : octave_value ();
    }

    octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1);

    void accept (tree_walker& tw)
    {
      tw.visit_superclass_ref (*this);
    }

  private:

    // The name of the method to call.  This is the text before the
    // "@" and may be of the form "object.method".
    std::string m_method_name;

    // The name of the superclass.  This is the text after the "@"
    // and may be of the form "object.method".
    std::string m_class_name;
  };

  class tree_metaclass_query : public tree_expression
  {
  public:

    tree_metaclass_query (void) = delete;

    tree_metaclass_query (const std::string& cls, int l = -1, int c = -1)
      : tree_expression (l, c), m_class_name (cls)
    { }

    // No copying!

    tree_metaclass_query (const tree_metaclass_query&) = delete;

    tree_metaclass_query& operator = (const tree_metaclass_query&) = delete;

    std::string class_name (void) const { return m_class_name; }

    bool has_magic_end (void) const { return false; }

    tree_metaclass_query * dup (symbol_scope& scope) const;

    octave_value evaluate (tree_evaluator&, int nargout = 1);

    octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1)
    {
      return ovl (evaluate (tw, nargout));
    }

    void accept (tree_walker& tw)
    {
      tw.visit_metaclass_query (*this);
    }

  private:

    std::string m_class_name;
  };

  class tree_classdef_attribute
  {
  public:

    tree_classdef_attribute (tree_identifier *i = nullptr,
                             tree_expression *e = nullptr)
      : m_id (i), m_expr (e), m_neg (false)
    { }

    tree_classdef_attribute (tree_identifier *i, bool b)
      : m_id (i), m_expr (nullptr), m_neg (b)
    { }

    // No copying!

    tree_classdef_attribute (const tree_classdef_attribute&) = delete;

    tree_classdef_attribute& operator = (const tree_classdef_attribute&) = delete;

    ~tree_classdef_attribute (void)
    {
      delete m_id;
      delete m_expr;
    }

    tree_identifier * ident (void) { return m_id; }

    tree_expression * expression (void) { return m_expr; }

    bool negate (void) { return m_neg; }

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_attribute (*this);
    }

  private:

    tree_identifier *m_id;
    tree_expression *m_expr;
    bool m_neg;
  };

  class tree_classdef_attribute_list : public base_list<tree_classdef_attribute *>
  {
  public:

    tree_classdef_attribute_list (void) { }

    tree_classdef_attribute_list (tree_classdef_attribute *a) { append (a); }

    tree_classdef_attribute_list (const base_list<tree_classdef_attribute *>& a)
      : base_list<tree_classdef_attribute *> (a)
    { }

    // No copying!

    tree_classdef_attribute_list (const tree_classdef_attribute_list&) = delete;

    tree_classdef_attribute_list&
    operator = (const tree_classdef_attribute_list&) = delete;

    ~tree_classdef_attribute_list (void);

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_attribute_list (*this);
    }
  };

  class tree_classdef_superclass
  {
  public:

    tree_classdef_superclass (const std::string& cname)
      : m_cls_name (cname)
    { }

    // No copying!

    tree_classdef_superclass (const tree_classdef_superclass&) = delete;

    tree_classdef_superclass&
    operator = (const tree_classdef_superclass&) = delete;

    ~tree_classdef_superclass (void) = default;

    std::string class_name (void) { return m_cls_name; }

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_superclass (*this);
    }

  private:

    std::string m_cls_name;
  };

  class tree_classdef_superclass_list
    : public base_list<tree_classdef_superclass *>
  {
  public:

    tree_classdef_superclass_list (void) { }

    tree_classdef_superclass_list (tree_classdef_superclass *sc)
    {
      append (sc);
    }

    tree_classdef_superclass_list (const base_list<tree_classdef_superclass *>& a)
      : base_list<tree_classdef_superclass *> (a)
    { }

    // No copying!

    tree_classdef_superclass_list (const tree_classdef_superclass_list&) = delete;

    tree_classdef_superclass_list&
    operator = (const tree_classdef_superclass_list&) = delete;

    ~tree_classdef_superclass_list (void);

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_superclass_list (*this);
    }
  };

  template <typename T>
  class tree_classdef_element : public tree
  {
  public:

    tree_classdef_element (tree_classdef_attribute_list *a,
                           base_list<T> *elist, comment_list *lc,
                           comment_list *tc, int l = -1, int c = -1)
      : tree (l, c), m_attr_list (a), m_elt_list (elist),
        m_lead_comm (lc), m_trail_comm (tc)
    { }

    // No copying!

    tree_classdef_element (const tree_classdef_element&) = delete;

    tree_classdef_element& operator = (const tree_classdef_element&) = delete;

    ~tree_classdef_element (void)
    {
      delete m_attr_list;
      delete m_elt_list;
      delete m_lead_comm;
      delete m_trail_comm;
    }

    tree_classdef_attribute_list * attribute_list (void) { return m_attr_list; }

    base_list<T> * element_list (void) { return m_elt_list; }

    comment_list * leading_comment (void) { return m_lead_comm; }

    comment_list * trailing_comment (void) { return m_trail_comm; }

    void accept (tree_walker&) { }

  private:

    // List of attributes that apply to this class.
    tree_classdef_attribute_list *m_attr_list;

    // The list of objects contained in this block.
    base_list<T> *m_elt_list;

    // Comments preceding the token marking the beginning of the block.
    comment_list *m_lead_comm;

    // Comments preceding the END token marking the end of the block.
    comment_list *m_trail_comm;
  };

  class tree_classdef_property
  {
  public:

    tree_classdef_property (tree_identifier *i,
                            comment_list *comments = nullptr);

    tree_classdef_property (tree_identifier *i, tree_expression *e,
                            comment_list *comments = nullptr);

    // No copying!

    tree_classdef_property (const tree_classdef_property&) = delete;

    tree_classdef_property& operator = (const tree_classdef_property&) = delete;

    ~tree_classdef_property (void)
    {
      delete m_id;
      delete m_expr;
    }

    tree_identifier * ident (void) { return m_id; }

    tree_expression * expression (void) { return m_expr; }

    comment_list * comments (void) const { return m_comments; }

    void doc_string (const std::string& txt) { m_doc_string = txt; }

    std::string doc_string (void) const { return m_doc_string; }

    bool have_doc_string (void) const { return ! m_doc_string.empty (); }

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_property (*this);
    }

  private:

    tree_identifier *m_id;
    tree_expression *m_expr;
    comment_list *m_comments;
    std::string m_doc_string;
  };

  class tree_classdef_property_list : public base_list<tree_classdef_property *>
  {
  public:

    tree_classdef_property_list (void) { }

    tree_classdef_property_list (tree_classdef_property *p) { append (p); }

    tree_classdef_property_list (const base_list<tree_classdef_property *>& a)
      : base_list<tree_classdef_property *> (a) { }

    // No copying!

    tree_classdef_property_list (const tree_classdef_property_list&) = delete;

    tree_classdef_property_list&
    operator = (const tree_classdef_property_list&) = delete;

    ~tree_classdef_property_list (void);

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_property_list (*this);
    }
  };

  class tree_classdef_properties_block
    : public tree_classdef_element<tree_classdef_property *>
  {
  public:

    tree_classdef_properties_block (tree_classdef_attribute_list *a,
                                    tree_classdef_property_list *plist,
                                    comment_list *lc, comment_list *tc,
                                    int l = -1, int c = -1)
      : tree_classdef_element<tree_classdef_property *> (a, plist, lc, tc, l, c)
    { }

    // No copying!

    tree_classdef_properties_block (const tree_classdef_properties_block&) = delete;

    tree_classdef_properties_block&
    operator = (const tree_classdef_properties_block&) = delete;

    ~tree_classdef_properties_block (void) = default;

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_properties_block (*this);
    }
  };

  class tree_classdef_methods_list : public base_list<octave_value>
  {
  public:

    tree_classdef_methods_list (void) { }

    tree_classdef_methods_list (const octave_value& f) { append (f); }

    tree_classdef_methods_list (const base_list<octave_value>& a)
      : base_list<octave_value> (a) { }

    // No copying!

    tree_classdef_methods_list (const tree_classdef_methods_list&) = delete;

    tree_classdef_methods_list&
    operator = (const tree_classdef_methods_list&) = delete;

    ~tree_classdef_methods_list (void) = default;

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_methods_list (*this);
    }
  };

  class tree_classdef_methods_block : public tree_classdef_element<octave_value>
  {
  public:

    tree_classdef_methods_block (tree_classdef_attribute_list *a,
                                 tree_classdef_methods_list *mlist,
                                 comment_list *lc, comment_list *tc,
                                 int l = -1, int c = -1)
      : tree_classdef_element<octave_value> (a, mlist, lc, tc, l, c)
    { }

    // No copying!

    tree_classdef_methods_block (const tree_classdef_methods_block&) = delete;

    tree_classdef_methods_block&
    operator = (const tree_classdef_methods_block&) = delete;

    ~tree_classdef_methods_block (void) = default;

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_methods_block (*this);
    }
  };

  class tree_classdef_event
  {
  public:

    tree_classdef_event (tree_identifier *i = nullptr,
                         comment_list *comments = nullptr);

    // No copying!

    tree_classdef_event (const tree_classdef_event&) = delete;

    tree_classdef_event& operator = (const tree_classdef_event&) = delete;

    ~tree_classdef_event (void)
    {
      delete m_id;
    }

    tree_identifier * ident (void) { return m_id; }

    comment_list * comments (void) const { return m_comments; }

    void doc_string (const std::string& txt) { m_doc_string = txt; }

    std::string doc_string (void) const { return m_doc_string; }

    bool have_doc_string (void) const { return ! m_doc_string.empty (); }

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_event (*this);
    }

  private:

    tree_identifier *m_id;
    comment_list *m_comments;
    std::string m_doc_string;
  };

  class tree_classdef_events_list : public base_list<tree_classdef_event *>
  {
  public:

    tree_classdef_events_list (void) { }

    tree_classdef_events_list (tree_classdef_event *e) { append (e); }

    tree_classdef_events_list (const base_list<tree_classdef_event *>& a)
      : base_list<tree_classdef_event *> (a)
    { }

    // No copying!

    tree_classdef_events_list (const tree_classdef_events_list&) = delete;

    tree_classdef_events_list&
    operator = (const tree_classdef_events_list&) = delete;

    ~tree_classdef_events_list (void);

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_events_list (*this);
    }
  };

  class tree_classdef_events_block
    : public tree_classdef_element<tree_classdef_event *>
  {
  public:

    tree_classdef_events_block (tree_classdef_attribute_list *a,
                                tree_classdef_events_list *elist,
                                comment_list *lc, comment_list *tc,
                                int l = -1, int c = -1)
      : tree_classdef_element<tree_classdef_event *> (a, elist, lc, tc, l, c)
    { }

    // No copying!

    tree_classdef_events_block (const tree_classdef_events_block&) = delete;

    tree_classdef_events_block&
    operator = (const tree_classdef_events_block&) = delete;

    ~tree_classdef_events_block (void) = default;

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_events_block (*this);
    }
  };

  class tree_classdef_enum
  {
  public:

    tree_classdef_enum (tree_identifier *i, tree_expression *e,
                        comment_list *comments);

    // No copying!

    tree_classdef_enum (const tree_classdef_enum&) = delete;

    tree_classdef_enum& operator = (const tree_classdef_enum&) = delete;

    ~tree_classdef_enum (void)
    {
      delete m_id;
      delete m_expr;
    }

    tree_identifier * ident (void) { return m_id; }

    tree_expression * expression (void) { return m_expr; }

    comment_list * comments (void) const { return m_comments; }

    void doc_string (const std::string& txt) { m_doc_string = txt; }

    std::string doc_string (void) const { return m_doc_string; }

    bool have_doc_string (void) const { return ! m_doc_string.empty (); }

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_enum (*this);
    }

  private:

    tree_identifier *m_id;
    tree_expression *m_expr;
    comment_list *m_comments;
    std::string m_doc_string;
  };

  class tree_classdef_enum_list : public base_list<tree_classdef_enum *>
  {
  public:

    tree_classdef_enum_list (void) { }

    tree_classdef_enum_list (tree_classdef_enum *e) { append (e); }

    tree_classdef_enum_list (const base_list<tree_classdef_enum *>& a)
      : base_list<tree_classdef_enum *> (a)
    { }

    // No copying!

    tree_classdef_enum_list (const tree_classdef_enum_list&) = delete;

    tree_classdef_enum_list& operator = (const tree_classdef_enum_list&) = delete;

    ~tree_classdef_enum_list (void);

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_enum_list (*this);
    }
  };

  class tree_classdef_enum_block
    : public tree_classdef_element<tree_classdef_enum *>
  {
  public:

    tree_classdef_enum_block (tree_classdef_attribute_list *a,
                              tree_classdef_enum_list *elist,
                              comment_list *lc, comment_list *tc,
                              int l = -1, int c = -1)
      : tree_classdef_element<tree_classdef_enum *> (a, elist, lc, tc, l, c)
    { }

    // No copying!

    tree_classdef_enum_block (const tree_classdef_enum_block&) = delete;

    tree_classdef_enum_block&
    operator = (const tree_classdef_enum_block&) = delete;

    ~tree_classdef_enum_block (void) = default;

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_enum_block (*this);
    }
  };

  class tree_classdef_body
  {
  public:

    typedef std::list<tree_classdef_properties_block *>::iterator
      properties_list_iterator;
    typedef std::list<tree_classdef_properties_block *>::const_iterator
      properties_list_const_iterator;

    typedef std::list<tree_classdef_methods_block *>::iterator
      methods_list_iterator;
    typedef std::list<tree_classdef_methods_block *>::const_iterator
      methods_list_const_iterator;

    typedef std::list<tree_classdef_events_block *>::iterator events_list_iterator;
    typedef std::list<tree_classdef_events_block *>::const_iterator
      events_list_const_iterator;

    typedef std::list<tree_classdef_enum_block *>::iterator enum_list_iterator;
    typedef std::list<tree_classdef_enum_block *>::const_iterator
      enum_list_const_iterator;

    tree_classdef_body (void);

    tree_classdef_body (tree_classdef_properties_block *pb);

    tree_classdef_body (tree_classdef_methods_block *mb);

    tree_classdef_body (tree_classdef_events_block *evb);

    tree_classdef_body (tree_classdef_enum_block *enb);

    // No copying!

    tree_classdef_body (const tree_classdef_body&) = delete;

    tree_classdef_body& operator = (const tree_classdef_body&) = delete;

    ~tree_classdef_body (void);

    void append (tree_classdef_properties_block *pb)
    {
      m_properties_lst.push_back (pb);
    }

    void append (tree_classdef_methods_block *mb)
    {
      m_methods_lst.push_back (mb);
    }

    void append (tree_classdef_events_block *evb)
    {
      m_events_lst.push_back (evb);
    }

    void append (tree_classdef_enum_block *enb)
    {
      m_enum_lst.push_back (enb);
    }

    std::list<tree_classdef_properties_block *> properties_list (void)
    {
      return m_properties_lst;
    }

    std::list<tree_classdef_methods_block *> methods_list (void)
    {
      return m_methods_lst;
    }

    std::list<tree_classdef_events_block *> events_list (void)
    {
      return m_events_lst;
    }

    std::list<tree_classdef_enum_block *> enum_list (void)
    {
      return m_enum_lst;
    }

    void doc_string (const std::string& txt) { m_doc_string = txt; }

    std::string doc_string (void) const { return m_doc_string; }

    bool have_doc_string (void) const { return ! m_doc_string.empty (); }

    void accept (tree_walker& tw)
    {
      tw.visit_classdef_body (*this);
    }

  private:

    std::string get_doc_string (comment_list *comment) const;

    std::list<tree_classdef_properties_block *> m_properties_lst;

    std::list<tree_classdef_methods_block *> m_methods_lst;

    std::list<tree_classdef_events_block *> m_events_lst;

    std::list<tree_classdef_enum_block *> m_enum_lst;

    std::string m_doc_string;
  };

  // Classdef definition.

  class tree_classdef : public tree_command
  {
  public:

    tree_classdef (const octave::symbol_scope& scope,
                   tree_classdef_attribute_list *a, tree_identifier *i,
                   tree_classdef_superclass_list *sc,
                   tree_classdef_body *b, comment_list *lc,
                   comment_list *tc, const std::string& pn = "",
                   int l = -1, int c = -1)
      : tree_command (l, c), m_scope (scope), m_attr_list (a), m_id (i),
        m_supclass_list (sc), m_element_list (b), m_lead_comm (lc),
        m_trail_comm (tc), m_pack_name (pn)
    { }

    // No copying!

    tree_classdef (const tree_classdef&) = delete;

    tree_classdef& operator = (const tree_classdef&) = delete;

    ~tree_classdef (void)
    {
      delete m_attr_list;
      delete m_id;
      delete m_supclass_list;
      delete m_element_list;
      delete m_lead_comm;
      delete m_trail_comm;
    }

    octave::symbol_scope scope (void) { return m_scope; }

    tree_classdef_attribute_list *
    attribute_list (void) { return m_attr_list; }

    tree_identifier * ident (void) { return m_id; }

    tree_classdef_superclass_list *
    superclass_list (void) { return m_supclass_list; }

    tree_classdef_body * body (void) { return m_element_list; }

    comment_list * leading_comment (void) { return m_lead_comm; }
    comment_list * trailing_comment (void) { return m_trail_comm; }

    std::string package_name (void) const { return m_pack_name; }

    octave_value make_meta_class (interpreter& interp,
                                  bool is_at_folder = false);

    std::string doc_string (void) const
    {
      return m_element_list ? m_element_list->doc_string () : "";
    }

    void accept (tree_walker& tw)
    {
      tw.visit_classdef (*this);
    }

  private:

    // The scope that was used when parsing the classdef object and that
    // corresponds to any identifiers that were found in attribute lists
    // (for example).  Used again when computing the meta class object.

    octave::symbol_scope m_scope;

    tree_classdef_attribute_list *m_attr_list;

    tree_identifier *m_id;

    tree_classdef_superclass_list *m_supclass_list;

    tree_classdef_body *m_element_list;

    comment_list *m_lead_comm;
    comment_list *m_trail_comm;

    std::string m_pack_name;
  };
}

#endif