#include <iostream.h>
#include <fstream.h>
#include <ctype.h>
#include "cdlist2.h"
#include "CPstring.h"

// program for manipulating database of CD's
// most elements of this program can be used
// to manipulate any kind of list/database, not just CD list/db
// Owen Astrachan
// 3/13/95


// array of choices/operations
// these should match up so that Choices[k] is character for Operations[k]
// numOps is the number of entries in Choices (and in Operations)

char Choices [] = {
    'a','t','g','p','r','q'
};

string Operations [] = {
    "add", "title search", "group search",
    "print","read","quit"
};

const int numOps = sizeof(Choices)/sizeof(char);
const int QUIT_CHAR = 'q';


// function prototypes for database manipulating functions
// and for menu system

void Menu();
void DoAdd(CDlist & list);
void DoQuit(CDlist & list);
void DoTitle(CDlist & list);
void DoGroup(CDlist & list);
void DoRead(CDlist & list);
void DoPrint(CDlist & list);
void Error(char ch);


main()
{
    CDlist list(4000);              // the list of CD's
    string line;
    char choice;

    do{
	Menu();
	cout << endl << "enter choice: ";
	getline(cin,line);                    // don't mix >> and getline
	choice = tolower(line[0]);
	switch (choice)                       // what action to take?
	{
	  case 'a':
	    DoAdd(list);
	    break;
	  case 'p':
	    DoPrint(list);
	    break;
	  case 'r':
	    DoRead(list);
	    break;
	  case 't':
	    DoTitle(list);
	    break;
	  case 'g':
	    DoGroup(list);
	    break;
	  case 'q':
	    DoQuit(list);
	    break;
	  default:
	    Error(choice);
	}
    } while (choice != QUIT_CHAR);
}

void
Menu()
// postcondition: all choices and corresponding operations printed     
{
    int k;
    for(k=0; k < numOps; k++)
    {
	cout << "[" << Choices[k] << "]\t";
	cout << Operations[k] << endl;
    }

}

void
DoRead(CDlist & list)
// postcondition: list is filled with entries from user-entered file
// exception: if file doesn't exist, program aborts     
{
    string name;
    string price,group,title,number;     // info for each CD
    ifstream input;
    
    cout << "name of input file: ";
    getline(cin,name);

    input.open(name);
    if (!input.good())
    {
	cerr << "couldn't open " << name << endl;
	exit(0);
    }

    list.DeleteAll();                    // remove old entries

    while (getline(input,number,':') &&
	   getline(input,price,':')  &&
	   getline(input,group,':')  &&
	   getline(input,title))
    {
	list.Add(CDinfo(atoi(number),title,atof(price),group));
    }
    
    cout << "total of " << list.Size() << " CD's" << endl;
   
}

void
DoAdd(CDlist & list)
// postcondition: new CD added to list (from user entered data)     
{
    cerr << "DoAdd not implemented" << endl;
}

void
DoPrint(CDlist & list)
// postcondition: all entries in list printed     
{
    list.Print();
}

void
DoTitle(CDlist & list)
// postcondition:  user prompted for title (or substring) and matches printed
{
    CDlist match(1000);   // holds all CD's that match user-entered title
    
    string name;
    cout << "title to look for: ";
    getline(cin,name);

    // uses advanced C++ feature, pointer to data member

    list.Search(&CDinfo::title,name,match);   

    match.Print();
}

void
DoGroup(CDlist & list)
// postcondition:  user prompted for group (or substring) and matches printed
{
    CDlist match(1000);   // holds all CD's that match user-entered title
    
    string name;
    cout << "group to look for: ";
    getline(cin,name); 
    
    list.Search(&CDinfo::group,name,match);

    match.Print();
}

void
DoQuit(CDlist & list)
{
    cout << "thanks for using our CD database" << endl;
}

void
Error(char ch)
// postcondition: error message printed     
{
    cerr << "Unrecognized option: " << ch << endl;
}