/*
    Assignment #2 - Fall 2024

    This program processes a file, storing information about
    each line in a struct within an array of structs.

    To compile this program:

        gcc -Wall -Werror -g -o a2 a2.c

    To run this program, you must specify 1 argument (the filename):

        ./a2 a2_data.txt
*/

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

#define MAX_LINES 100
#define DEBUG 1

/*
 * Stats for a given line in a file will be stored together in a struct.
 */
typedef struct
{
    char first;
    char last;
    int length;
} line_stats_t;

/*
 * Reads in the given file and stores statistics for each line.
 *
 * Inputs:
 *   - file_name: the name of the file (as a C "string")
 *   - stats: the array of line_stats_t, with space for one entry per line
 * 
 * Returns: number of lines parsed if successful, or a negative value if not
 */
int parse_stats(char *file_name, line_stats_t stats[])
{
    // TODO: Parts A and C
    return 0;
}

/*
 * Prints out statistics, with one per entry in stats.
 *
 * Inputs:
 *   - stats: the array of line_stats_t
 *   - num_lines: the number of entries in stats
 */
void print_results(line_stats_t stats[], int num_lines)
{
    // TODO: Parts B and C
}

// Leave this here: it's a nice way to test your individual functions
// without dividing this code into multiple files; any code between
// this and the corresponding #endif will be deleted during testing,
// so don't put anything here that you need!
#ifndef __TESTING__

/*
 * Run the program!
 */
int main(int argc, char **argv)
{
    // Get the filename
    char *file_name = NULL;
    if (argc == 2)
    {
        file_name = argv[1];
        if (DEBUG) printf("The file to parse is: \"%s\"\n", file_name);
    }
    else
    {
        fprintf(stderr, "You need to provide the filename as a command-line argument.  Good-bye!\n");
        return 1;
    }

    // Allocate the array (assume at most MAX_LINES lines in the file)
    line_stats_t file_stats[MAX_LINES];

    // Read the file and parse out stats
    int res = parse_stats(file_name, file_stats);
    if (res < 0)
    {
        fprintf(stderr, "An error occurred while parsing the file, returned: %d\n", res);
        return 1;
    }
    else
    {
        if (DEBUG) printf("Found %d lines.\n", res);
    }

    // Pretty-print out the results
    print_results(file_stats, res);

    // Return 0 to indicate success
    return 0;
}

#endif // __TESTING__