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

typedef struct Node
{
    char code[20];
    char type[20];
    char name[50];
    char ch[20];
    int price;
    int num;
    char date[20];
    struct Node *next;
} node;
int t=0;
void insert_after(node *p,char name[50],char code[20],int num,char ch[20],char type[20],int price,char ex_date[20])
{
    //char name1[20]
    while(p->next != NULL)
    {
        p = p->next;
    }
    p->next = (node *)malloc(sizeof(node));

    strcpy(p->next->name,name);
    strcpy(p->next->code,code);
    p->next->num = num;
    strcpy(p->next->ch,ch);
    strcpy(p->next->type,type);
    p->next->price = price;
    strcpy(p->next->date,ex_date);
    p->next->next = NULL;
}

void edit_data(node *p,char code[])
{
    int n,ct=0;
    //char name1[20];
    //char code1[20];
    int num1;
    int price1;
    char name1[50];
    char code1[20];
    char type1[20];
    char ch1[20];
    //node *temp = search(p,id);
    p = p->next;
    while(p != NULL)
    {
        if(strcmp(p->code,code) == 0)
        {
            printf("\n****Product's Data To Edit****\n");

            printf("Product name        : %s\n", p->name);
            printf("Product CODE        : %s\n", p->code);
            printf("Total amount of Products: %d %s\n",p->num,p->ch);
            printf("Product TYPE        : %s\n", p->type);
            printf("Product PRICE       : %d\n", p->price);
            printf("Product EXPIRED DATE: %s\n\n", p->date);

            printf("Select your option to Edit the case: ");

            scanf("%d",&n);

            if(n == 1)
            {
                printf("Enter the NAME of Product: ");
                scanf(" %[^\n]s", name1);
                strcpy(p->name,name1);
            }
            else if(n == 2)
            {
                printf("Enter the CODE: ");
                scanf("%s",&code1);
                strcpy(p->code,code1);
            }
            else if(n == 3)
            {
                printf("Enter the Total amount of Products : ");
                scanf("%d %s",&num1,ch1);
                p->num = num1;
                strcpy(p->ch,ch1);
            }
            else if(n == 4)
            {
                printf("Enter Product TYPE: ");
                scanf("%s",type1);
                strcpy(p->type,type1);
            }
            else if(n == 5)
            {
                printf("Enter Product PRICE: ");
                scanf("%d",&price1);
                p->price = price1;
            }
            else
            {
                printf("\nError Selection!!\n");
            }
        }
        ct++;
        p = p -> next;
    }
    if(ct == 0)
        printf("\nProduct not Found!\n");

}

void search(node *p, char type[20])
{
    int ct=0;
    p = p->next;

    //node *temp = p;
    printf("\n----------------------------------------------------------------\n");
    printf("        ****Displaying Searched Product's information****          ");
    printf("\n----------------------------------------------------------------\n");

    while(p != NULL)
    {
        if(strcmp(p->type,type) == 0)
        {
            ct++;

            printf("  Product name        : %s\n", p->name);
            printf("  Product CODE        : %s\n", p->code);
            printf("  Total amount of Products  : %d Pieces\n",p->num);
            printf("  Product TYPE        : %s\n", p->type);
            printf("  Product PRICE       : %d\n", p->price);
            printf("  Product EXPIRED DATE: %s\n\n", p->date);
        }
        p = p -> next;
    }
    if(ct == 0)
        printf("Sorry!Product not found.\n");
    else
        printf("Total %s Items are %d\n",type,ct);

}

int sold(node *p, char code[20],int pc)
{
    int ct=0,sum=0;
    //node *temp;
    while(p->next != NULL)
    {

        if(strcmp(p->next->code,code) == 0)
        {
            if(pc > p->next->num)
            {
                printf("Not Enough Product in Storage!\n\n");
                return 0;
            }
            sum = pc*p->next->price;

            p->next->num = p->next->num - pc;
            return sum;
        }
        p = p->next;
    }
    if(ct == 0)
    {
        printf("Product Not Found!!\n");
    }
}

void display(node *p)
{
    while(p -> next != NULL)
    {
        printf("  Product name        : %s\n", p->next->name);
        printf("  Product CODE        : %s\n", p->next->code);
        printf("  Total amount of Products  : %d %s\n",p->next->num,p->next->ch);
        printf("  Product TYPE        : %s\n", p->next->type);
        printf("  Product PRICE       : %d\n", p->next->price);
        printf("  Product EXPIRED DATE: %s\n\n", p->next->date);
        //printf("Student name: %s\n", p->next->name);
        p = p->next;
    }
}
int total(int sum)
{
    t = t + sum;
    return t;
}
void delete(node *p, char code[20])
{
    int ct=0;
    node *temp;
    while(p->next != NULL)
    {
        if(strcmp(p->next->code,code) == 0)
        {
            ct++;
            temp = p->next;
            p->next = temp->next;
            free(temp);
            return 0;
        }
        p = p->next;
    }
    if(ct == 0)
    {
        printf("Element Not Found!!\n");
    }
}
void check_code(node *p,char code[])
{
    while(p->next != NULL)
    {
        if(strcmp(p->next->code,code)==0)
        {
            printf("\nThis CODE Already exists!\n");
            printf("Enter a new code please! :- ");
            scanf("%s",code);
        }
        p = p->next;
    }
}

int main()
{
    system("color f0");
    //system("font 2b");
    int n,p,s;
    char q;
    char ch[20];
    char ch1[20];
    char name[50];
    char code[20];
    char type[20];
    int num;
    int price;
    char ex_date[20];

    node *start = (node *)malloc(sizeof(node));
    start -> next = NULL;

    while(1)
    {

        printf("\n----------------------------------------------------------------------------\n");
        printf("                     Welcome to Supershop Management System"                    );
        printf("\n----------------------------------------------------------------------------\n");
        printf("\tLog in as:\n");
        printf(" \n\t\t 1. ADMIN \n\n\t\t 0. EXIT");
        printf("\n----------------------------------------------------------------------------\n");
        printf("                                                            "                    );
        printf("\n----------------------------------------------------------------------------\n");
        printf("\n\tEnter Choice:\t\t");
        int choice;
        scanf("%d",&choice);
        switch(choice)
        {
        case 1:

        while(1)
        {
            printf("\n1. Insert Product data\n");
            printf("2. Buyer's BILL\n");
            printf("3. Display\n");
            printf("4. Total SALE\n");
            printf("5. Search\n");
            printf("6. Edit Product information\n");
            printf("7. Delete product\n");
            printf("8. Exit the programme\n");

            printf("\nEnter choice: ");


            scanf(" %c",&q);

            switch(q)
            {

            case '1':
                system("CLS");
                printf("\nIf your want to EXIT the case press '0' else press any key\n");
                scanf("%d",&s);

                if(s == 0)
                    break;
                else
                {
                    printf("\n---------------------------------------------------------------\n");
                    printf("                 Enter Product information                     ");
                    printf("\n---------------------------------------------------------------\n");
                    //printf("\n\nEnter Product information\n\n");
                    printf("Enter name: ");
                    scanf(" %[^\n]s", name);
                    printf("Enter CODE: ");
                    scanf("%s", code);
                    check_code(start,code);
                    printf("Total amount of product: ");
                    scanf("%d %s",&num,ch);
                    printf("Enter Product Type: ");
                    scanf(" %s", type);
                    printf("Enter Product Price: ");
                    scanf("%d", &price);
                    printf("Enter Product Expired Date: ");
                    scanf(" %s", ex_date);

                    insert_after(start,name,code,num,ch,type,price,ex_date);
                }
                break;

            case '2':
                system("CLS");
                printf("\nIf your want to EXIT the case press '0' else press any key\n");
                scanf("%d",&s);

                if(s == 0)
                    break;
                else
                {
                    printf("How many Types of ITEM: ");
                    scanf("%d",&n);
                    int sum =0;
                    for(int i=0; i<n; i++)
                    {
                        printf("Enter the Product code: ");
                        scanf("%s", code);
                        printf("Amount of product? :- ");
                        scanf("%d %s",&p,ch1);
                        sum = sum+ sold(start,code,p);
                        //slip(start,code,p);
                    }
                    total(sum);
                    printf("\n---------------------------------------\n");
                    printf("        Total BILL: %d taka            ",sum);
                    printf("\n---------------------------------------\n");
                }
                break;

            case '3':
                system("CLS");
                printf("\nIf your want to EXIT the case press '0' else press any key\n");
                scanf("%d",&s);

                if(s == 0)
                    break;
                else
                {
                    printf("\n----------------------------------------------\n");
                    printf("       ****Product's information****          ");
                    printf("\n----------------------------------------------\n");
                    display(start);
                }
                break;
            case '4':
                system("CLS");
                printf("\nIf your want to EXIT the case press '0' else press any key\n");
                scanf("%d",&s);

                if(s == 0)
                    break;
                else
                {
                    printf("\n---------------------------------------\n");
                    printf("        Total Daily SALE: %d taka            ",t);
                    printf("\n---------------------------------------\n");
                }
                break;
            case '5':
                system("CLS");
                printf("\nIf your want to EXIT the case press '0' else press any key\n");
                scanf("%d",&s);

                if(s == 0)
                    break;
                else
                {
                    printf("Enter the Product TYPE: ");
                    scanf("%s",type);
                    search(start,type);
                }
                break;
            case '6':
                system("CLS");
                printf("\nIf your want to EXIT the case press '0' else press any key\n");
                scanf("%d",&s);

                if(s == 0)
                    break;
                else
                {
                    printf("\nEnter the Product CODE to Edit data: ");
                    scanf("%s",code);
                    edit_data(start,code);
                }
                break;
            case '7':
                system("CLS");
                printf("\nIf your want to EXIT the case press '0' else press any key\n");
                scanf("%d",&s);

                if(s == 0)
                    break;
                else
                {
                    printf("\nEnter the Product CODE to Delete: ");
                    scanf("%s",code);
                    delete(start,code);
                }
            case '8':
                exit(0);
            default:
                system("CLS");
                printf("Invalid choice.Try again!\n");
                break;
            }
        }
            break;
        case 0:
            exit(0);
            //break;

        }
    }
}