#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
{
  //friend DiffNodeController;
public:
  enum ApplicationDirection
  {
    ApplyToModel = 20,
    ApplyToDb,
    DontApply,
    CantApply
  };

  typedef std::vector<DiffNode *> DiffNodeVector;

private:

  DiffNodePart model_part;
  DiffNodePart db_part;
  ApplicationDirection applyDirection;
  DiffNodeVector children;
  bool modified;

public:

  DiffNode(GrtNamedObjectRef model_object, GrtNamedObjectRef external_object, bool inverse)
    : model_part(inverse ? external_object : model_object), 
      db_part(inverse ? model_object : external_object),
      modified(false)
  {
    set_modified_and_update_dir(!model_object.is_valid() || !external_object.is_valid());
  }

  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(int idx) { return children[idx]; }
  DiffNode *find_child_by_db_part_name(const std::string& name);
  //DiffNode *find_child_by_model_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; }
  void set_modified_and_update_dir(bool m);

  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;
  //void sync_old_name();

};

class 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 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;

  enum DiffItemAction
  {
    DiffItemRemoved, DiffItemModified
  };

  struct DiffItem {
    DiffItem(grt::ValueRef obj, DiffItemAction a) : object(obj), action(a) {}
    grt::ValueRef object;
    DiffItemAction action;
  };

  typedef std::list<DiffItem> DiffItemList;
  typedef std::stack<grt::ValueRef> ModifiedObjectStack;

  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;

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

  //static void build_catalog_map(db_mysql_CatalogRef catalog, CatalogMap& map);
  void build_diff_item_list(const DiffChange* diffchange, DiffItemList& list, ModifiedObjectStack& workstack);
  void update_tree_from_diff_item_list(DiffNode *root, const DiffItemList& work);

  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 int count_children(const bec::NodeId &);
  virtual bec::NodeId get_child(const bec::NodeId &, int);
  virtual bool get_field(const bec::NodeId &node_id, int column, std::string &value);
  virtual bec::IconId get_field_icon(const bec::NodeId &node, int 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);
  
  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;
  //void sync_old_name();
};

#endif  // _DB_MYSQL_SQL_EXPORT_DIFF_TREE_H_
