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

#define f fflush(stdin);

struct data{
	char name[100];
	int qty;
	int ctr;
	struct data *next, *prev;
};

struct data *head=NULL, *tail, *curr, *temp;

void add(char name[], int qty, int ctr){

	curr = (struct data*) malloc(sizeof(struct data));
	strcpy(curr->name, name);
	curr->qty = qty;
	curr->ctr = ctr;
	curr->next = NULL;
	curr->prev = NULL;

	if(head == NULL){
		head = tail = curr;
	}else{
		curr->next = head;
		head = curr;
	}
}

void display(char name[], int qty){
	int ctr=0;

	temp = head;
	printf("-------+--------------------------------+-----------\n");
	printf("| No.  | Name of Parts                  | Quantity |\n");
	printf("-------+--------------------------------+-----------\n");
	while(temp != NULL){
		ctr++;
		printf("|  %2d. | %-31s| %-9d|\n", ctr, temp->name, temp->qty);
		temp = temp->next;
	}
	printf("-------+--------------------------------+-----------");
	getchar();
}

void apus(int ctr){

	temp = head;
	int num;


	if(temp == NULL){
		printf("\n\n\n--- There is No Order in The List ---");
		getchar();
	}else{
		printf("\n\n Input Number of The Order [1..%d]: ", ctr);
		scanf("%d", &num); fflush(stdin);

		while(temp != NULL){
		if(temp->ctr == num) break;
		temp = temp->next;
		}
		system("cls");
		if(temp == head){
			head = head->next;
			free(temp);

			if(head != NULL){
				head->prev = NULL;
			}
		}else if(temp == tail){
			tail = tail->prev;
			free(temp);
			tail->next = NULL;
		}else{
			temp->prev->next = temp->next;
			temp->next->prev = temp->prev;
			free(temp);
		}
	}

}

int main(){
	int menu;
	char name[100];
	int qty;
	int ctr=0;

	do{
		system("cls");
		puts("BLUE MOTORCYCLE PARTS");
		puts(".....................\n");
		puts("1. View Order List");
		puts("2. Add New Order");
		puts("3. Take Order");
		puts("4. Exit\n");
		do{
			printf(">> Input choice :");
			scanf("%d", &menu);fflush(stdin);
		}while(menu<1 || menu>4);

		if(menu ==1){
			system("cls");
			display(name,ctr);
			getchar();
		}

		if(menu ==2){
			do{
				printf("\nInput Name of Motorcycle's Part [3..30]: ");
				gets(name);
			}while(strlen(name)<3 || strlen(name)>30);
			do{
				printf("\nInput Quantity of The Motorcycle's Part [1..20]: ");
				scanf("%d", &qty);f
			}while(qty<1 || qty>20);
			++ctr;
			add(name, qty, ctr);
			printf("\n\n\n--- Add New Order Success ---");
			getchar();
		}

		if(menu ==3){
			display(name,ctr);
			apus(ctr);

		}
	}while(menu != 4);

	getchar();
}