#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>

#include "pdu.h"

#ifndef WINDOW_H
#define WINDOW_H


typedef struct {
    bool isValid;
    int sequenceNum;
    uint8_t PDU[MAX_BUFFER];
    int packetLength;
} windowEntry;

typedef struct {
    int windowSize;
    int lower;
    int upper;
    int current;
    windowEntry *table;
} Window;

Window createWindow(int winSize);
windowEntry createEntry();
windowEntry createValidEntry(bool valid, int seqNum, int pktLen);
windowEntry createValidPDUEntry(int seqNum, uint8_t *pkt, int pktLen);
void addEntry (Window * win, windowEntry we);
void addPDUToWindow (Window *win, uint8_t *pdu, int pktLen);
windowEntry getEntry (Window win, int seqNum);
windowEntry getLowestEntry(Window win);
void copyPDULocal(Window *win, uint8_t *local, int *localSize, int index);
void markEntryInvalid(Window *win, int index);
void handleRR (Window *win, int rr);
windowEntry handleSREJ (Window win, int srej);
void printEntry (windowEntry we);
bool isWindowOpen (Window win);
void printWindowMetaData(Window win);
void printWindow(Window win);

#endif