/******************************************************************************
 * Assignment 2
 * Course:          OOP244
 * Family Name:     Hearsum
 * Given Name:      Ben
 * Student Number:  047-687-991
 * Login Name:      bjhearsu
 * Professor:       Ian Tipson
 * Due Date:        February 17, 2006
 * Last Modified:   January 27, 2006
 *
 * I declare that the attached assignment is my own work in accordance with
 * Seneca Academic Policy. No part of this assignment has been copied manually
 * or electronically from any other source (including web sites) or distributed
 * to other students.
 *****************************************************************************/

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

#include "Account.h"

/* removes an element of a string at 'pos' */
void pushString(char s[], int pos) {
    int i = pos;
    int len = strlen(s);
    for(; i < len; i++) {
        s[i] = s[i+1];
    }
}

/* removes extra whitespace from strings. *
 * "this   is  \t\na test\n\n" becomes:   *
 * "this is a test" */
int oneSpace(char s[]) {
    /* iterators */
    int i = 0;
    int len = strlen(s);
    /* convert the \t and \n to spaces first */
    for(; i < len; i++) {
        if(s[i] == '\n' || s[i] == '\t') {
            s[i] = ' ';
        }
    }

    /* get rid of leading whitespace... */
    i = 0;
    while(s[i] == ' ' && s[i] != '\0') {
        pushString(s, 0);
    }
    /* ...and trailing whitespace... */
    i = strlen(s) - 1;
    while(s[i] == ' ' && i != 0) {
        pushString(s, i);
        i--;
    }
    /* ...and extra spaces */
    len = strlen(s);
    for(i = 0; i < len; i++) {
       if(s[i] == ' ' && s[i+1] == ' ') {
            pushString(s, i);
            /* the string is shorter, the iterator needs to be moved back */
            i--;
        }
    }
    /* return the length of it */
    return strlen(s);
}

/* this is used by some of the accessor functions to extract information
 * from the customer string.
 */
void Account::extractInfo(char st[], int field) {
    int i = 0;
    strcpy(st, customer);
    int len = strlen(st);

    /* field needs to be positive, otherwise what the heck is it looking for?
     */
    if(field) {
        /* if we're looking for the first record..do this once
         * the second, do it twice, etc
         */
        for(i = 0; i < field; i++) {
            while(st[0] != ',') {
                pushString(st, 0);
            }
            pushString(st, 0);
        }
    }
    len = strlen(st);
    /* find the next comma or the end of the record and write a null byte on it
     */
    for(i = 0; i < len; i++) {
        if(st[i] == ',' || st[i] == ';') {
            st[i] = '\0';
        }
    }
}

/* initializes an account with the data given */
void Account::init(char c[], char num[], int b) {
    changeCustomerInfo(c);
    changeAccountNumber(num);
    changeBalance(b);
}

/* changes only the customer variable */
int Account::changeCustomerInfo(char c[]) {
    /* holds any characters over 250 in the string */
    int excess_chars = 0;
    int i;
    oneSpace(c);

    /* copy up to 250 characters... */
    for(i = 0; i < 250 && c[i] != '\0'; i++) {
        customer[i] = c[i];
    }
    /* terminate it */
    customer[i] = '\0';

    /* if the string is less than 250, return 0, otherwise, returns excess */
    excess_chars = strlen(c) <= 250 ? 0 : strlen(c) - 250;

    
    return excess_chars;
}