/*
	File Name	: process.c
	Course Number   : ISYS 290 04
	Student Name    : Jason Gradziel
	Student Number  : 826-135-535
	Professors Name : Brian Perry
	Class Name      : Wednesday 9:55 - 12:35
	Lab Title       : Assignment #2 E-Mail.
	*/

	#include<stdio.h>
	#include<string.h>

int word_count(char* str);

int process (char* result, char* source)
{
	char input[35] = {"\0"};
	char register_email[14] = {"\0"};
	char code[11] = {"\0"};
	char mail_id_char[4] = {"\0"};
	char mail_id_num[4] = {"\0"};
	int  return_num = 0;
	int  num = 0;
	int  count = 0;
	int  flag = 0;
	char r_email[] = {"REGISTER_EMAIL"};
	char* c[] =
	      {
		"CENG303-50",
		"ISYS290-04",
		"ISYS290-06",
		"ISYS291-01",
		"ISYS291-50",
	      };
	int n=0;
	/* set result to null*/
	strcpy(result,NULL);

	num = word_count(source);
	if (num>4)
	{
		strcpy(result,"INVALID");
		return num;
	}
	/* to copy contents of source to input */
	strcpy(input, source);

	/* to copy the needed contents of input to register_email */
	for (count=0; count<14; count++)
	{
		register_email[count] = input[count];
	}

	/* to copy the needed contents of input to code */
	for (count=15; count<25; count++)
	{
		code[count-15] = input[count];
	}

	/* to copy the needed contents of input to mail_id_char */
	for (count=26; count<31; count++)
	{
		mail_id_char[count-26] = input[count];
	}

	/* to copy the needed contents of input to mail_id_num */
	for (count=30; count<34; count++)
	{
		mail_id_num[count-30] = input[count];
	}

	/* Check */
	/* check first word REGISTER_EMAIL */
	num=0;
	for (count=0; count<14; count++)
	{
		if (register_email[count] == r_email[count])
		{
			num++;
		}
	}
	if (num==14)
	{
		flag++;
	}

	/* check second word course code */
	num=0;
	for (n=0; n<5; n++)
	{
		for (count=0; count<10; count++)
		{
			if (code[count] == c[n][count])
			{
				num++;
				if (num==10)
				{
					flag++;
					n=5;
					count=10;
				}
			}
		}
	}
	/*if (num==10)
	{
		flag++;
	}*/

	/* check third word e-mail */
	/* check first four alpha characters */
	num=0;
	for (count=0; count<4; count++)
	{
		if (isalpha(mail_id_char[count]))
		{
			num++;
		}
	}
	if (num == 4)
		flag++;

	/* check last four numaric characters */
	num=0;
	for (count=0; count<4; count++)
	{
		if (isdigit(mail_id_num[count]))
		{
			num++;
		}
	}
	if (num == 4)
		flag++;

	/* Copy to result if correct or incorrect */
	if (flag == 4)
	{
		strcpy(result,input);
		/*result=input;
		for (count=0; count<35; count++)
		{
			result[count] = input[count];
		}*/
		return_num=0;
	}
	else
	{
		strcpy(result,"INVALID");
		return_num = 19;
	}

	/*printf("\n%s", result);
	getch();*/

	return return_num;
}