/*********************************************
* Section : 15
* Machine No. : N
* Roll No. : 19CS100XY
* Name : Aritra Hazra
* Assignment No : 7
* Description : Transactions in Medical Store
*********************************************/

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

#define MAX 10000
#define MAXID 10
#define MAXNAME 100
#define MAXDAY 2
#define MAXMONTH 2
#define MAXYEAR 4
#define MAXDATE (MAXDAY + MAXMONTH + MAXYEAR + 3)

typedef struct medicine {
    char medID[MAXID];
    char medName[MAXNAME];
    char medMaker[MAXNAME];
    char mfgDate[MAXDATE], expDate[MAXDATE];
    unsigned int quantity;
    double pricePerQuantity;
    int type; /* 0 --> liquid, 1 --> tablet, 2-> capsule, 3 --> injection, 4 --> inhale, 5 --> external-use */
} medInfo;

void printMedicineType (int t)
{
    switch(t) {
        case 0:  printf("Liquid"); break;
        case 1:  printf("Tablet"); break;
        case 2:  printf("Capsule"); break;
        case 3:  printf("Injection"); break;
        case 4:  printf("Inhale"); break;
        case 5:  printf("External"); break;
        default: printf("Unknown"); break;
    }
}

int main ()
{
    medInfo med[MAX], buyMed[MAX];
    int medCount = 0, i, j, k, q, t, yearInt, monthInt, dayInt, discardFlag;
    double total, billTotal;
    char day[MAXDAY+1], month[MAXMONTH+1], year[MAXYEAR+1], name[MAXNAME];
    char choice = ' ', refill, buy, discard;

    while(choice != 'e'){
        printf("\n===== !! Welcome to Wonderland Medical Store !! =====\n");
        printf("-- Options:\n\t(a) Order/Refill Medicine,\n\t(b) Buy Medicine,\n\t(c) In-store Medicine Statistics,\n\t(d) Discard Medicines,\n\t(e) Exit.\n");
        printf("-- Enter a Choice: ");
        scanf(" %c", &choice);
        refill = 'y'; buy = 'y'; discard = ' ';
        
        switch(choice){
            case 'a': /* Order/Refill Medicine */
            case 'A':
                while (refill == 'y') {
                    printf("++ Enter Medicine Details ++\n");
                    printf("\t-- Enter Medicine ID: ");
                    scanf("%s", med[medCount].medID);
                    printf("\t-- Enter Medicine Name: ");
                    scanf("%s", med[medCount].medName);
                    printf("\t-- Enter Medicine Maker's Name: ");
                    scanf("%s", med[medCount].medMaker);
                    printf("\t-- Enter Manufacturing Date (in DD/MM/YYYY Format): ");
                    scanf("%s/%s/%s", day, month, year);
                    strcpy(med[medCount].mfgDate, day);
                    strcat(med[medCount].mfgDate, "/");
                    strcat(med[medCount].mfgDate, month);
                    strcat(med[medCount].mfgDate, "/");
                    strcat(med[medCount].mfgDate, year);
                    med[medCount].mfgDate[MAXDATE-1] = '\0';
                    printf("\t-- Enter Expiry Date (in DD/MM/YYYY Format): ");
                    scanf("%s/%s/%s", day, month, year);
                    strcpy(med[medCount].expDate, day);
                    strcat(med[medCount].expDate, "/");
                    strcat(med[medCount].expDate, month);
                    strcat(med[medCount].expDate, "/");
                    strcat(med[medCount].expDate, year);
                    med[medCount].expDate[MAXDATE-1] = '\0';
                    printf("\t-- Enter Quantity (Number of Medicines): ");
                    scanf("%u", &(med[medCount].quantity));
                    printf("\t-- Enter Price Per Quantity (in INR): ");
                    scanf("%lf", &(med[medCount].pricePerQuantity));
                    printf("\t-- Enter Medicine Type (0: Liquid, 1: Tablet, 2: Capsule, 3: Injection, 4: Inhale, 5: External): ");
                    scanf("%d", &(med[medCount].type));
                    medCount ++;
                    printf("Want to Add more Medicine in Wonderland-Store? (Type 'y' for YES)? ");
                    scanf(" %c", &refill);
                }
                break;

            case 'b': /* Buy Medicine */
            case 'B':
                billTotal = 0; j=0;
                while (buy == 'y') {
                    printf("\t-- Enter Medicine Name: ");
                    scanf("%s", name);
                    printf("\t-- Enter Quantity (Number of Medicines to Buy): ");
                    scanf("%u", &q);
                    printf("\t-- Enter Medicine Type (0: Liquid, 1: Tablet, 2: Capsule, 3: Injection, 4: Inhale, 5: External): ");
                    scanf("%d", &t);
                    for (i=0; i<medCount; i++) {
                        if ( !strcmp(med[i].medName, name) && (med[i].type==t) ) {
                            if (med[i].quantity >= q) {
                                buyMed[j] = med[i];
                                buyMed[j].quantity = q;
                                med[i].quantity = med[i].quantity - q;
                                if(med[i].quantity == 0) {
                                    for (k=i+1; k<medCount; k++)
                                        med[k-1] = med[k];
                                    medCount--;
                                }
                                j++;
                            }
                            else
                                printf("*** Stock-Over: Specified Medicine Stock is Inadequate! ***\n");
                            break;
                        }
                    }
                    if ( (i==medCount) && (medCount!=0) )
                        printf("*** Not-Found: Specified Medicine not found in Store! ***\n");
                    printf("Want to Buy more Medicine in Wonderland-Store? (Type 'y' for YES)? ");
                    scanf(" %c", &buy);
                }
                printf("\n++ Purchased Medicine Bill ++\n");
                printf("ID        Name        Maker        Type         ManufactureDate        ExpiryDate        Quantity        UnitPrice        TotalPrice\n");
                for (i=0; i<j; i++) {
                    printf("%-10s%-12s%-13s", buyMed[i].medID, buyMed[i].medName, buyMed[i].medMaker);
                    printMedicineType(buyMed[i].type);
                    printf("\t%-23s%-18s%-16d%-17lf%lf\n", buyMed[i].mfgDate, buyMed[i].expDate,
                                                                 buyMed[i].quantity, buyMed[i].pricePerQuantity,
                                                                 (buyMed[i].quantity)*(buyMed[i].pricePerQuantity));
                    billTotal += (buyMed[i].quantity)*(buyMed[i].pricePerQuantity);
                }
                printf("\nTotal Purchased Medicine Amount = %lf\n", billTotal);
                break;

            case 'c': /* In-store Medicine Statistics */
            case 'C':
                total = 0;
                printf("\n++ In-store Medicine Statistics ++\n");
                printf("ID        Name        Maker        Type         ManufactureDate        ExpiryDate        Quantity        UnitPrice        TotalPrice\n");
                for (i=0; i<medCount; i++) {
                    printf("%-10s%-12s%-13s", med[i].medID, med[i].medName, med[i].medMaker);
                    printMedicineType(med[i].type);
                    printf("\t%-23s%-18s%-16d%-17lf%lf\n", med[i].mfgDate, med[i].expDate,
                                                                 med[i].quantity, med[i].pricePerQuantity,
                                                                 (med[i].quantity)*(med[i].pricePerQuantity));
                    total += (med[i].quantity)*(med[i].pricePerQuantity);
                }
                printf("\nTotal In-store Medicine Amount = %lf\n", total);
                break;

            case 'd': /* Discard Medicines */
            case 'D':
                printf("\n++ Discarding Specified Medicines ++\n");
                printf("Want to Discard specific Medicines from Wonderland-Store? (Type 'y' for YES)? ");
                scanf(" %c", &discard);
                if (discard == 'y') {
                    do {
                        printf("\t-- Enter Medicine Name: ");
                        scanf("%s", name);
                        printf("\t-- Enter Medicine Type (0: Liquid, 1: Tablet, 2: Capsule, 3: Injection, 4: Inhale, 5: External): ");
                        scanf("%d", &t);
                        for (i=0; i<medCount; i++) {
                            if ( !strcmp(med[i].medName, name) && (med[i].type==t) ) {
                                for (k=i+1; k<medCount; k++)
                                    med[k-1] = med[k];
                                medCount--;
                                break;
                            }
                        }
                        if (i == medCount)
                            printf("*** Not-Found: Specified Medicine not found in Store! ***\n");
                        printf("Want to Discard specific Medicines from Wonderland-Store? (Type 'y' for YES)? ");
                        scanf(" %c", &discard);
                    } while(discard == 'y');
                }
                break;

            case 'e': /* Exit or Terminate */
            case 'E':
                printf("\n===== !! Good-Bye ! Have a Nice Day !! =====\n\n");
                break;

            default: /* Wrong Choice */
                printf("*** Warning: Wrong Choice Entered! Re-enter ... ***\n");
                break;
        }
    }

    return 0;
}