// example.cpp
// Program to demonstrate ConfigFile class

#include <string>
#include <iostream>
#include "ConfigFile.h"
#include "Triplet.h"

using std::string;
using std::cout;
using std::endl;

int main( void )
{
	// A configuration file can be loaded with a simple
	
	ConfigFile config( "example.inp" );
	
	// Values can be read from the file by name
	
	int apples;
	config.readInto( apples, "apples" );
	cout << "The number of apples is " << apples << endl;
	
	double price;
	config.readInto( price, "price" );
	cout << "The price is $" << price << endl;
	
	string title;
	config.readInto( title, "title" );
	cout << "The title of the song is " << title << endl;
	
	// We can provide default values in case the name is not found
	
	int oranges;
	config.readInto( oranges, "oranges", 0 );
	cout << "The number of oranges is " << oranges << endl;
	
	int fruit = 0;
	fruit += config.read( "apples", 0 );
	fruit += config.read( "pears", 0 );
	fruit += config.read( "oranges", 0 );
	cout << "The total number of apples, pears, and oranges is ";
	cout << fruit << endl;
	
	// Sometimes we must tell the compiler what data type we want to
	// read when it's not clear from arguments given to read()
	
	int pears = config.read<int>( "pears" );
	cout << "The number of pears is " << pears;
	cout << ", but you knew that already" << endl;
	
	// The value is interpreted as the requested data type
	
	cout << "The weight is ";
	cout << config.read<string>("weight");
	cout << " as a string" << endl;
	
	cout << "The weight is ";
	cout << config.read<double>("weight");
	cout << " as a double" << endl;
	
	cout << "The weight is ";
	cout << config.read<int>("weight");
	cout << " as an integer" << endl;
	
	// When reading boolean values, a wide variety of words are
	// recognized, including "true", "yes", and "1"
	
	if( config.read( "sale", false ) )
		cout << "The fruit is on sale" << endl;
	else
		cout << "The fruit is full price" << endl;
	
	// We can also read user-defined types, as long as the input and
	// output operators, >> and <<, are defined
	
	Triplet point;
	config.readInto( point, "zone" );
	cout << "The first point in the zone is " << point << endl;
	
	// The readInto() functions report whether the named value was found
	
	int pommes = 0;
	if( config.readInto( pommes, "pommes" ) )
		cout << "The input file is in French:  ";
	else if( config.readInto( pommes, "apples" ) )
		cout << "The input file is in English:  ";
	cout << "The number of pommes (apples) is " << pommes << endl;
	
	// Named values can be added to a ConfigFile
	
	config.add( "zucchini", 12 );
	int zucchini = config.read( "zucchini", 0 );
	cout << "The number of zucchini was set to " << zucchini << endl;
	
	// And values can be removed
	
	config.remove( "pears" );
	if( config.readInto( pears, "pears" ) )
		cout << "The pears are ready" << endl;
	else
		cout << "The pears have been eaten" << endl;
	
	// An entire ConfigFile can written (and restored)
	
	cout << "Here is the modified configuration file:" << endl;
	cout << config;
	
	return 0;
}