//
// phonebook.cpp
//

#include "phonebook.h"
#include <string>
#include <iostream>
#include <algorithm>
#include <iomanip>
using namespace std;

PhoneBook::PhoneBook() : entries{0} { }

bool PhoneBook::empty() const {
  return entries <= 0;
}

int PhoneBook::index_of(string target) const {
  int i = 0;
  while ( i < entries && book[i]->name() != target )
    ++i;
  if ( i >= entries )
    return NOT_FOUND;
  else
    return i;
}

Entry *PhoneBook::lookup(string target) const {
  int loc = index_of(target);
  if ( loc == NOT_FOUND )
    return nullptr;
  else
    return book[loc];
}

void PhoneBook::add(Entry *new_entry) {
  if ( lookup(new_entry->name()) == nullptr ) {
    book[entries] = new_entry;
    ++entries;
  }
}

void PhoneBook::remove(string name) {
  int loc = index_of(name);
  if ( loc != NOT_FOUND ) {
    for(int i = loc; i < entries - 1; ++i)
      book[i] = book[i + 1];
    --entries;
  }
}

void PhoneBook::list() const {
  size_t maxlen = 0;
  for(int i = 0; i < entries; ++i)
    maxlen = max(maxlen, book[i]->name().length());
  for(int i = 0; i < entries; ++i) {
    cout << setw(maxlen + 1) << setiosflags(ios::left) << book[i]->name();
    cout << resetiosflags(ios::left);
    cout << book[i]->number() << endl;
  }
}