/* 
 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
 *
 * 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; version 2 of the
 * License.
 * 
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */

#ifndef _DB_MYSQL_SQL_EXPORT_DIFF_TREE_H_
#define _DB_MYSQL_SQL_EXPORT_DIFF_TREE_H_

#include <stack>

#include "grt/tree_model.h"
#include "grts/structs.db.h"
#include "grts/structs.db.mysql.h"
#include "grtpp.h"

#include "grtdb/catalog_templates.h"

using namespace grt;
std::string utf_to_upper(const char *str);

#include "diff/diffchange.h"
#include "db_mysql_public_interface.h"

class DiffNode;

std::ostream& operator << (std::ostream& os, const DiffNode&);

std::string get_old_name_or_name(GrtNamedObjectRef obj);

template<typename T>
std::string get_catalog_map_key(Ref<T> t)
{
  typedef typename ct::Traits<T>::ParentType Parent;

  std::string parent_key(
    utf_to_upper(get_catalog_map_key(Ref<Parent>::cast_from(t->owner())).c_str()));

  std::string obj_key(
    utf_to_upper(get_old_name_or_name(t).c_str()));

  return std::string(parent_key)
    .append(".").append(T::static_class_name())
    .append(".`").append(obj_key).append("`");
}

template<>
std::string get_catalog_map_key<db_mysql_Catalog>(db_mysql_CatalogRef cat);

//std::string get_catalog_map_key(db_mysql_CatalogRef cat);
//std::string get_catalog_map_key(db_mysql_SchemaRef schema);
//std::string get_catalog_map_key(db_mysql_TableRef table);
//std::string get_catalog_map_key(db_ColumnRef column);
//std::string get_catalog_map_key(db_mysql_IndexRef index);
//std::string get_catalog_map_key(db_mysql_IndexColumnRef index_col);
//std::string get_catalog_map_key(db_mysql_ForeignKeyRef fk);
//std::string get_catalog_map_key(db_mysql_ViewRef view);
//std::string get_catalog_map_key(db_mysql_RoutineRef routine);
//std::string get_catalog_map_key(db_mysql_TriggerRef trigger);

class DiffNodePart
{
  GrtNamedObjectRef object;
  bool modified;

public:

  DiffNodePart(GrtNamedObjectRef obj)
    : object(obj), modified(false)
  {}

  bool is_modified() const { return modified; }
  void set_modified(bool mod) { modified= mod; }
  bool is_valid_object() const { return object.is_valid(); }
  std::string get_name() const { return std::string(object->name().c_str()); }
  GrtNamedObjectRef get_object() const { return object; }
};

class DiffNodeController;

class DiffNode
{
public:
  enum ApplicationDirection
  {
    ApplyToModel = 20,
    ApplyToDb,
    DontApply,
    CantApply
  };

  typedef std::vector<DiffNode *> DiffNodeVector;

private:

  DiffNodePart model_part;
  DiffNodePart db_part;
  boost::shared_ptr<DiffChange> change;
  ApplicationDirection applyDirection;
  DiffNodeVector children;
  bool modified;

public:

  DiffNode(GrtNamedObjectRef model_object, GrtNamedObjectRef external_object, bool inverse, boost::shared_ptr<DiffChange>  c = boost::shared_ptr<DiffChange>())
    : model_part(inverse ? external_object : model_object), 
      db_part(inverse ? model_object : external_object),
      change(c), modified(false)
  {
    set_modified_and_update_dir(!model_object.is_valid() || !external_object.is_valid(), c);
  }

  ~DiffNode()
  {
      for (DiffNodeVector::iterator It = children.begin();  It != children.end(); ++It)
          delete *It;
  }
  
  void dump(int depth = 0);

  boost::shared_ptr<DiffChange> get_change()const {return change;};

  void apply_direction(const ApplicationDirection& d)
  {
    applyDirection = d;
  }

  ApplicationDirection apply_direction() const
  {
    return applyDirection;
  }

  ApplicationDirection get_application_direction() const { return applyDirection; }

  const DiffNodePart& get_model_part() const { return model_part; }
  const DiffNodePart& get_db_part() const { return db_part; }

  void append(DiffNode *child) { children.push_back(child); }

  size_t get_children_size() const { return children.size(); }
  DiffNode *get_child(size_t idx) { return children[idx]; }
  DiffNode *find_node_for_object(const grt::ObjectRef obj);
  DiffNode *find_child_by_db_part_name(const std::string& name);

  DiffNodeVector::const_iterator get_children_begin() const { return children.begin(); }
  DiffNodeVector::const_iterator get_children_end() const { return children.end(); }

  bool is_modified() const { return modified; }
  bool is_modified_recursive() const {
    if (modified)
      return true;
    for (DiffNodeVector::const_iterator i = children.begin(); i != children.end(); ++i)
      if ((*i)->is_modified_recursive())
        return true;
    return false;
  }
  void set_modified_and_update_dir(bool m, boost::shared_ptr<DiffChange> c);

  void get_object_list_for_script(std::vector<grt::ValueRef>& vec) const;
  void get_object_list_to_apply_to_model(std::vector<grt::ValueRef>& vec, std::vector<grt::ValueRef>& removal_vec) const;

};

class WBPLUGINDBMYSQLBE_PUBLIC_FUNC DiffNodeController
{
public:
  DiffNodeController();
  DiffNodeController(const std::map<DiffNode::ApplicationDirection,DiffNode::ApplicationDirection> directions_map);
  void set_next_apply_direction(DiffNode *node)const;
  void set_apply_direction(DiffNode *node, DiffNode::ApplicationDirection dir, bool recursive)const;
protected:
  std::map<DiffNode::ApplicationDirection,DiffNode::ApplicationDirection> _directions_map;
};

class WBPLUGINDBMYSQLBE_PUBLIC_FUNC DiffTreeBE : public bec::TreeModel
{
public:
  // icon, model-changed, model-object-name, apply-direction, icon, db-changed, db-object-name

  enum LayerColumns
  {
    ModelChanged= 10,
    ModelObjectName,
    ApplyDirection,
    DbChanged,
    DbObjectName
  };

private:
  DiffNodeController _node_controller;

  template<typename T>
  static T find_object_in_catalog_map(T cat, const CatalogMap& map);

  DiffNode *_root;
  bec::IconId change_nothing_icon, 
              change_backward_icon, 
              change_forward_icon, 
              change_ignore_icon,
              alert_icon,
              create_alert_icon,
              drop_alert_icon;

  std::vector<std::string> _schemata;

  //static void build_catalog_map(db_mysql_CatalogRef catalog, CatalogMap& map);
  bool update_tree_with_changes(const boost::shared_ptr<DiffChange> diffchange);
  void apply_change(GrtObjectRef obj, boost::shared_ptr<DiffChange> change);

  void fill_tree(DiffNode *root, db_mysql_CatalogRef catalog, const CatalogMap& map, bool inverse);
  void fill_tree(DiffNode *schema_node, db_mysql_SchemaRef schema, const CatalogMap& map, bool inverse);
  void fill_tree(DiffNode *table_node, db_mysql_TableRef table, const CatalogMap& map, bool inverse);

  public:
  DiffNode *get_node_with_id(const bec::NodeId &nodeid);
  DiffTreeBE(const std::vector<std::string>& schemata,
             db_mysql_CatalogRef model_catalogRef, 
             db_mysql_CatalogRef external_catalog, 
             boost::shared_ptr<DiffChange> diffchange, DiffNodeController controller = DiffNodeController());
  virtual ~DiffTreeBE() {delete _root; };

  virtual size_t count_children(const bec::NodeId &);
  virtual bec::NodeId get_child(const bec::NodeId &, size_t);
  virtual bool get_field(const bec::NodeId &node_id, ColumnId column, std::string &value);
  virtual bec::IconId get_field_icon(const bec::NodeId &node, ColumnId column, bec::IconSize size);
  virtual void refresh() {}
  
  void set_next_apply_direction(const bec::NodeId &node_id);
  void set_apply_direction(const bec::NodeId &node_id, DiffNode::ApplicationDirection dir, bool recursive);
  DiffNode::ApplicationDirection get_apply_direction(const bec::NodeId &node_id);
  
  void get_object_list_for_script(std::vector<grt::ValueRef>& vec) const;
  void get_object_list_to_apply_to_model(std::vector<grt::ValueRef>& vec, std::vector<grt::ValueRef>& removal_vec) const;
};

#endif  // _DB_MYSQL_SQL_EXPORT_DIFF_TREE_H_