// Cody Scott
// Computer Programming II  (COMP-1431-WA - 63676)
// Assignment 2
// Question 2
// This program accepts user input containing a date and a reminder
// once the user is finished entering dates with reminders it
// displays the reminders sorted by date

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

int main () {
    // used to compare dates and place the reminders in teh correct array location
    int day1, day2;
    int month1, month2;
    int time1, time2;

    char reminders[100][100]; // list of all reminders
    char reminder[100];

    //initlizes to all reminders to 32, will not add a date greater than 31 into the reminders list
    //also accounts for the more than 2 digit output
    for (int i = 0; i < 100; i++)
        strcpy(reminders[i], "13/32/2500");

    for(;;){
        printf("Enter 0 to view all reminders and exit.\nEnter month/day/time and reminder.\nExample Input: 12/1/1800 Party\n");

        fgets(reminder, 101, stdin);
        //used to get the date from the string entered by the user
        sscanf(reminder, "%d/%d/%d", &month1, &day1, &time1);
        if (day1<0 || day1>31)
            printf("\nERROR - invalid day, please enter a day from 0 to 31\n\n");

        //if they want to display and exit
        if (reminder[0] == '0')
            break;

        //goes through all elements
        for (int i=0;i<100;i++){
            //gets date to compare with
            sscanf(reminders[i], "%d/%d/%d", &month2, &day2, &time2);
            //if it is less than the date in that location
            //ie it should be in spot i
            if ((day1 > 0) ||(month1<month2) || (month1 == month2 && day1<day2) || (month1 == month2 && day1 == day1 && time1<time2)){
                //moves all elements from the end back to i
                for (int h = 99; h > i-1;h--){
                    strcpy(reminders[h],reminders[h-1]); //shift them all down one element
                }//keep repeating and move each element down one more location
                //place the new reiminder in the correct location
                strcpy(reminders[i], reminder);
                break;
            }
        }


    }

    //Output

    char *ch; //used to fomat teh current reminder
    for (int i = 0; i < 100;i++){
        sscanf(reminders[i], "%d/%d/%d", &month1, &day1, &time1);
        //if it is not 32 which it was initialized to be
        if (month1 != 13){
            //outputs the date right justified
            printf("%2d%2d%d", month1, day1, time1);
            //then the date is taken out of the string since it was already printed
            ch = strtok(reminders[i], " ");
            ch = strtok (NULL, "\0");
            // outputs the message of the reminder
            printf(" - %s", ch);
            //adds the message back to the date concatenating reminders[i] back together
            //strcat(reminders[i], ch);
        }
    }

    return 0;
}