/*
David Valladares
HW#7
COP 3223 Section 2
Annie Wu
*/

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


struct Shift
{
char name[100];
char day_of_week[100];
int start_hour;
int end_hour;
};

struct Shift shift_data[100];
struct Shift temp[100];

int read_data(struct Shift shift_data[], int *num_shifts);
void sort_data(struct Shift shift_data[], int *num_shifts);
void print_data(struct Shift shift[], int *num_shifts);




int main (void)
{

int num_shifts;


read_data(shift_data, &num_shifts);

sort_data(shift_data, num_shifts);

print_data(shift_data, num_shifts);




return 0;
}




// Preconditions: array of structure "Shift" to store data
// Postconditions: number of shifts read in from data file
// Actions: Ask user for name of input file. Read the number
// of shifts, then read in the data for all
// of the shifts. Return the number of shifts.
int read_data(struct Shift shift_data[], int *num_shifts)
{
    int i;
    char infile_name[50];
    char shift_name[100], shift_day[100];


        printf("What is the name of your input file?\n"); //ask user for input file name
        scanf("%s", infile_name);

        FILE *input;                        //declare file pointer
        input = fopen(infile_name, "r");    //open input file

        fscanf(input, "%d", num_shifts);

            for (i=0; i<*num_shifts; i++) // read in data
            {
                fscanf(input, "%s", &shift_data[i].name);
                fscanf(input, "%s", &shift_data[i].day_of_week);
                fscanf(input, "%d", &shift_data[i].start_hour);
                fscanf(input, "%d", &shift_data[i].end_hour);


            }


fclose(input);
return num_shifts;
}




// Preconditions: array of structure "Shift"
// integer value indicating number of shifts
// Postconditions: none - this function does not return anything.
// Actions: Sort the shifts by the TA's first name.

void sort_data(struct Shift shift_data[], int *num_shifts)
{
int i;

for(i=0; i>num_shifts; i++)
{
    if (i == 0)
      strcpy(shift_data[i].name, temp[i].name);

    // Update if we find a new first name.
    else if (strcmp(temp[i].name, shift_data[i].name) < 0)
      strcpy(shift_data[i].name, temp[i].name);
}




}




// Preconditions: array of structure "Shift"
// integer value indicating number of shifts
// Postconditions: none - this function does not return anything.
// Actions: Print the sorted data in the format described below.
void print_data(struct Shift shift[], int *num_shifts)
{

int i;

printf("\n\n\n");

    for (i=0; i<num_shifts; i++)
    {
        printf("%-5s\t", shift_data[i].name);
        printf("%-8s\t", shift_data[i].day_of_week);


            //decide whether to convert time value and place am and pm in correct locations
            if (shift_data[i].start_hour > 12)
                    {
                        shift_data[i].start_hour -= 12;
                        printf("%3d:00 pm  to  ",  shift_data[i].start_hour);
                    }
            else if (shift_data[i].start_hour < 12)
                {
                        printf("%3d:00 am  to  ",  shift_data[i].start_hour);
                }
            else if (shift_data[i].start_hour == 12)
                    {
                       printf("%3d:00 pm  to  ",  shift_data[i].start_hour);
                    }



            if (shift_data[i].end_hour > 12)
                    {
                        shift_data[i].end_hour -= 12;
                        printf("%3d:00 pm\n", shift_data[i].end_hour);
                    }
            else if (shift_data[i].start_hour < 12)
                    {
                        printf("%3d:00 am\n", shift_data[i].end_hour);
                    }

            else if (shift_data[i].end_hour == 12)
                    {
                       printf("%3d:00 pm\n",  shift_data[i].end_hour);
                    }
                }

}