//  File:  main.cpp
//  Purpose:  start of solution to CS II, HW 4, Spring 2006

#include <fstream>
#include <iostream>
#include <list>
#include <string>
#include "wishlist.h"

using namespace std;

//  Returns an iterator pointing to the entry in the list of wishlists
//  with this name.  If the entry is not in the list, the iterator
//  will be at the end of the list.
list<WishList>::iterator
wish_find(list<WishList>& wish_lists, const string& name) {
  list<WishList>::iterator p;
  for (p=wish_lists.begin(); p!=wish_lists.end(); ++p) {
    if (p->name() == name) break;
  }
  return p;
}

int main(int argc, char* argv[]) {
  //  Make sure there are three arguments.
  if (argc != 3) {
    cerr << "Usage:\n  " << argv[0] << " infile outfile\n";
    return 1;
  }
  //  Open and test the input and output files.
  ifstream istr(argv[1]);
  if (!istr) {
    cerr << "Could not open " << argv[1] << " to read\n";
    return 1;
  }
  ofstream ostr(argv[2]);
  if (!ostr) {
    cerr << "Could not open " << argv[2] << " to write\n";
    return 1;
  }

  list<WishList> wish_lists;       // A container to store all the WishLists
  char request;                    // The input char indicating the request
  string name, item, buyer;        // The input name, item and buyer name
  float price;                     // The item price
  list<WishList>::iterator w_itr;  // The iterator to access a particular WishList

  // The loop will end when there are no more input requests, skipping
  // over white-space chars.
  while (istr >> request) {

    if (request == 'a') {
      // =================================
      // Add an item to the wish list     
      // =================================

      // read rest of input line
      istr >> name >> item >> price;   
      
      // find the right wishlist
      w_itr = wish_find(wish_lists, name);
      if (w_itr == wish_lists.end()) {
	// need to add a new wishlist
	wish_lists.push_back(WishList(name));
	ostr << "New wish list added for " << name << endl;
	w_itr = wish_lists.end();  
	w_itr--;
      } 
      // add the item
      w_itr->add_to_list(item, price);
      ostr << "Item " << item << " added to wish list for " << name << endl;

    } else if (request == 'p') {
      // =================================
      //  Purchase an item from a WishList
      // =================================








    } else if (request == 'w') {
      // =================================
      //  Output the WishList
      // =================================








    } else if (request == 'b') {
      // =================================
      //  Output the purchased items
      // =================================








    }
  }
  
  return 0;
}