// CSE143 Sp01 Homework 1 Sample Solution
// hw1sol.cpp - main program
// SRB  6/20

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

#include "wordlist.h"


// Read words data from "words.txt" and stores in WordList instance
// Returns true if successful; otherwise returns false

bool readWordList(WordList &words) {
	string	badWord, goodWord; // Misspelled and correctly spelled word
	

	// Attempt to open file; quit if unsuccessful
	ifstream data("words.txt");
	if (!data) {
		return false;
	}

	// read data from file
	data >> badWord >> goodWord;
	while (badWord != ".") {
		addWord(words, badWord, goodWord);
		data >> badWord >> goodWord;
	}
	return true;
}


// Handles user interaction, breaks the sentence into individual words, and 
//queries the WordList for each one.  Prints out the corrected work, on the fly,
//to the screen
void correctSentences(WordList &words) {
	char sentence[200];
	string correctWord;		// string representing the correctly spelled word
	int numErrors=0;			// total number of errors
	char seps[]   = "  ,!.?";	// denotes seperator for the tokens 
	char *token;			// points to the current token
	int found=0;			// stores if a match was made in the WordList

	cout << "Please enter your sentence or a period to stop:" << endl;
	gets( sentence );
	while (sentence[0] != '.') {
		//initializes the 1st token
		token = strtok( sentence, seps );
	
		while( token != NULL )	   {
			//Retrieves the correctly spelled version of the word
			queryWordList(words,token,correctWord,found);
			numErrors += found;
			cout<<correctWord<<" ";
			//gets next token from the sentence
			token = strtok( NULL, seps );
		}

		cout<<endl<<"Number of errors = "<<numErrors<<endl<<endl;
		cout << "Please enter your sentence or a period to stop" << endl;
		// read next sentence
		gets( sentence );
		numErrors = 0;
	}
	cout << "Bye" << endl;
}


// main program
int main() {
	WordList words;		// list of place names and locations
	bool  success;	// = "input file read successfully"

	//initializes the WordList
	makeWordListEmpty(words);

	//inserts the words in words.txt to the data structure
	success = readWordList(words);
	if (!success) {
		cout << "Unable to read input file" << endl;
		return 1;
	}

	correctSentences(words);
	return 0;
}