//
// phonebook.h - naive, array-based implementation
//

#ifndef _phonebook_h
#define _phonebook_h

#include <string>

// An entry in a phone book; captures the person's name and number
// Number is a string to allow for non-numeric data
// All methods are inline to illustrate this.
class Entry {
public:
  Entry(std::string name = "", std::string number = "")
    : _name(name), _number(number) { }
  std::string name() const { return _name; }
  std::string number() const { return _number; }
  void updateNumber(std::string new_number) { _number = new_number; }
private:
  std::string _name, _number;
};


// The full phone book with standard container operations to add,
//   look up, and remove entries.
// All methods are defined in a separate .cpp file.
class PhoneBook
{
public:
  // construct empty phonebook
  PhoneBook();
  // is phonebook empty?
  bool empty() const;
  // look up entry by name, returning nullptr if no such entry
  Entry *lookup(std::string target) const;
  // add entry; does nothing if already present
  void add(Entry *new_entry);
  // remove entry; does nothing if entry not present
  void remove(std::string name);
  // list all entries formatted in two columns
  void list() const;
private:
  int entries;
  static constexpr int MAX_ENTRIES = 2000, NOT_FOUND = -1;
  Entry *book[MAX_ENTRIES];
  // index of target name, NOT_FOUND if no entry for target
  int index_of(std::string target) const;
};

#endif