#include <iostream>
#include <ostream>
#include <fstream>
#include <cstdlib>
#include <string>
#include <algorithm>

// Enumerators 
enum META_DATA_CODE { S, A, P, I, O, M };
enum META_DATA_DESCRIPTERS { end, hard, keyboard, printer, monitor, run, start, allocate, mouse, speaker };
/*
	Note: "hard" in the descripter type will be for the hard drive. We shall not have any name conflictions
	or spacings between words 
*/

// External Headers 
// #include "MemoryHandling"
// #include "ErrorHandling"

// Public Functions
bool is_conf( const std::string &path );
bool isEmpty( std::ifstream &file );

int main( int argc, char* argv[] )
   {
	 // Initialize Variables and Constants
	 
	 	// File Stream Management
	 	std::ifstream inFile;
	 	std::ofstream outFile;
	 	std::string STRING;
	 
	 // Error check command line 
	 if( argc != 2 )
	 	{
	 	 // This will automatically check for a missing file name
	 	 std::cout << "Not enough arguments, please enter a file name" << std::endl;
	 	 std::cout << "Program Terminated." << std::endl;
	 	} 
	 	
	 // Error checking for file types, mispellings, or not found files
	 
	 	// Attempt to open file	
	 	inFile.open( argv[1] ); 
	 
	 	// File has incorrect extension (e.g. .conf)
	 	// if( extension is NOT .conf and NOT .cnf )
	   if( !is_conf( argv[1] ) )
	   	{	   	 	
	   	 // Display general error message and terminate program
	    	 std::cout << "You have entered a file that does not have the .conf extension." << std::endl;
	    	 std::cout << "Program Terminated" << std::endl;
	 		}
	 	
	 	// Incorrect file name spelling
	 	// File is not found in the system
	 	else if(inFile.fail() )
	 		{
	 		 std::cout << "ERROR: File could not be found. Please check spelling" << std::endl;
	 		 std::cout << "Program Terminated." << std::endl;
	 		}
	 	
	 	// File is empty
	 	else if( isEmpty( inFile ) )
	 		 	{
	 			  std::cout << "ERROR: File is empty or corrupted!" << std::endl;
	 			  std::cout << "Program Terminated." << std::endl;
	 			 }
	 			 
	 	// File was correctly entered within specifications
	   else
	      {
	       
	       std::cout << argv[1] << std::endl;
	 		 std::cout << "File Successfully opened. Please wait." << std::endl;
	 		 
	 		 while(!inFile.eof())
	 		    {
	 		     getline( inFile, STRING );
	 		     std::cout << STRING << std::endl;
	 		    }
	 		}	

	 
    return 0;
   }
   
// Function Implementations
   
// This function is to check within the file name that it has the matching
// Extension of .conf before even reading the file.
bool is_conf( const std::string &path )
   {
	 std::string isConfExt = path.substr(path.length() - 5);
	 
	 return isConfExt == ".conf";
   }
   
// This function checks if the file opened is empty
// Terminate program if the file is empty or corrupted
bool isEmpty( std::ifstream &file )
	{
	 bool isempty = false;
	
	 file.seekg(0, std::ios::end);
	 size_t size = file.tellg();
	 
	 if( size == 0 )
	    {
	     isempty = true;
	    }
	    
	 return isempty;
	}
	
	
/*	
Start Simulator Configuration File
Version/Phase: 1.0
File Path: test_1a.mdf
Processor cycle time (msec): 10
Monitor display time (msec): 25
Hard drive cycle time (msec): 50
Printer cycle time (msec): 500
Keyboard cycle time (msec): 1000
Memory cycle time (msec): 35
Mouse cycle time (msec): 20
Speaker cycle time (msec): 10
Log: Log to Both
Log File Path: output/output_1.out
End Simulator Configuration File
*/