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

typedef struct node
{
char row_no;
int seat_no,pin;
char book;
struct node *next,*prev;
}node;

node *hn=NULL;

void create()
{
node *nn,*cn;
int j=1;
int k=2;
char c ='A';

do
{
int i=1;
do
{
k=(k*k)/10+100-k/2;
nn=(struct node*)malloc(sizeof(node));
nn->next=nn->prev=NULL;
nn->row_no=c;
nn->seat_no=i;
nn->pin=k;
nn->book='a';
if(hn==NULL)
{
hn=nn;
nn->next=nn->prev=hn;
}
else
{
cn=hn;

while(cn->next!=hn)
    cn=cn->next;

cn->next=nn;
nn->prev=cn;
nn->next=hn;
hn->prev=nn;
}
i++;
}while(i<=7);
j++;
c++;
}while(j<=10);
}

void display()
{
node *cn;
cn=hn;
printf("------------------------------------------------------------------\n");
printf("|                            Platinum                            |\n");
while(cn->next!=hn)
{
if((cn->prev)->row_no!=cn->row_no)
printf("| ");
printf("%c ",cn->row_no);
printf("%d ",cn->seat_no);
if(cn->book=='a')
printf("\033[32;40m -> a  \033[0m");  //green text with black background
else
printf("\033[1;31;43m -> b  \033[0m");  //red text
if((cn->next)->row_no!=cn->row_no)
printf("|\n");
if(cn->row_no=='C'&&cn->seat_no==7)
{
printf("-----------------------------------------------------------------------\n");
printf("|                             gold                               |\n");
}
if(cn->row_no=='H'&&cn->seat_no==7)
{
printf("----------------------------------------------------------------------\n");
printf("|                            Silver                              |\n");
}
cn=cn->next;
}
printf("%c",cn->row_no);
printf("%d",cn->seat_no);
if(cn->book=='a')
printf("\033[32;40m -> a  \033[0m");
else
printf("\033[1;31;43m -> b  \033[0m");
printf("|\n");

printf("------------------------------------------------------------------\n\n");
printf("\033[1;33;49mPLATINUM-> 150              GOLD-> 100                  SILVER->60\033[0m\n");
}

void display1(node *tmp[20],int n)
{
if(n!=1)
{
printf("------------------------------------------------------------------\n");
printf("THANK YOU!\nYOU HAVE SUCCESFULLY BOOKED THE SEATS\n");
for(int i=1;i<n;i++)
{
printf("%c %d ",tmp[i]->row_no,tmp[i]->seat_no);
printf("   PIN : %d \n",tmp[i]->pin);
}
printf("!!!!!!!!!!!!!!!!!!KEEP PIN SAFELY!!!!!!!!!!!!!!!!!!!\n");
printf("PINS ARE REQUIRED AT THE TIME OF CANCELATION OF SEATS\n");
printf("------------------------------------------------------------------\n");
}
}
void book_seat()
{
node *cn,*temp[20];
int n,z,flag;
char row;
int seat;
char ch;
do
{
z=1;
printf("\nEnter No Of Tickets u Want To Buy: ");
scanf("%d",&n);

printf("\nEnter Seat Numbers: \n");

for(int i=1;i<=n;i++)
{
printf("NO ");
printf("%d",i);
printf(" = ");
scanf(" %c",&row);
scanf("%d",&seat);
cn=hn;
while(cn->next!=hn)
{
if(cn->row_no==row && cn->seat_no==seat)
{
if(cn->book=='a')
{
cn->book='b';
temp[z]=cn;
z++;
}
else
{
printf("INVALID CHOISE!\n");
printf("%c",cn->row_no);
printf("%d",cn->seat_no);
printf(" Seat is alredy reserved \n");

}
}
cn=cn->next;
}
if(cn->row_no==row && cn->seat_no==seat)
{
if(cn->book=='a')
{
cn->book='b';
temp[z]=cn;
z++;
}
else
{
printf("INVALID CHOISE!\n");
printf("%c",cn->row_no);
printf("%d",cn->seat_no);
printf(" Seat is alredy reserved\n");
}
}
}

display1(temp,z);
printf("\n\nPRESS 1 To check Seat Status\n");
printf("PRESS 2 To book other seat\n");
printf("PRESS 3 To Exit BOOKING PORTAL\n");
printf("\ninput: ");
scanf("%c",&ch);
if(ch==1)
display();
}while(ch=='2');
}

void cancel()
{
char row;
int ch;
int seat,pin;
node *cn;
do
{
ch=1;
cn=hn;
printf("SEAT NUMBER :");
scanf(" %c",&row);
scanf("%d",&seat);
printf("PIN :");
scanf("%d",&pin);
while(cn->next!=hn)
{
if(cn->row_no==row && cn->seat_no==seat && cn->pin==pin)
{
printf("Are you sure u want to cancle the Seat (y/n) ");
char c;
scanf(" %c",&c);
if(c=='y'||c=='Y')
{
printf("SEAT CANCELED SUCCESFULLY!\n");
cn->book='a';
}
}
else if(cn->row_no==row && cn->seat_no==seat && cn->pin!=pin)
{
printf("invalid SEAT NUMBER && PIN combination!!!!\n");
}
cn=cn->next;
}
if(cn->row_no==row && cn->seat_no==seat && cn->pin==pin)
{
printf("Are you sure u want to cancle (y/n) ");
char c;
scanf("%c",&c);
if(c=='y'||c=='Y')
{
printf("SEAT CANCELED SUCCESFULLY!\n");
cn->book='a';
}
}
else if(cn->row_no==row && cn->seat_no==seat && cn->pin!=pin)
{
printf("invalid SEAT NUMBER && PIN combination!!!!\n");
}
printf("\n\nPRESS 1 To Check Seat Status\n");
printf("PRESS 2 To Cancle More Tickets\n");
printf("PRESS 3 To Exit CANCELATION PORTAL\n");
printf("\ninput: ");
scanf("%d",&ch);
if(ch==1);
//display();
}
while(ch==2);
}

int main()
{
int ch;
int c;
printf("\n\n\n");
printf("                 WELCOME TO MOVIE TICKET BOOKING \n");
printf("                         ONLINE  \n\n");
create();
display();

do
{
printf("\n\n\n");
printf("PRESS 1-> BOOK TICKETS\n");
printf("PRESS 2-> CANCEL TICKETS\n");
printf("PRESS 3-> EXIT\n");
printf("\ninput: ");
scanf("%d",&ch);
switch(ch)
{
case 1:
book_seat();
display();
break;
case 2:
cancel();
display();
break;
}
if(ch!=3)
{
printf("\n\nPRESS 1 To Main Menu\n");
printf("PRESS 2 To Exit CINEMAX PORTAL\n");
printf("\ninput: ");
scanf("%d",&c);
}
}while(c==1);
printf("\n\n\n");
return 0;
}