// psram_buffer.h - PSRAM-based Ring Buffer for CAN FD Logger

#ifndef PSRAM_BUFFER_H
#define PSRAM_BUFFER_H

#include <Arduino.h>
#include "types.h"

#define PSRAM_CAN_BUFFER_SIZE    (512 * 1024)
#define PSRAM_SD_BUFFER_SIZE     (16 * 1024)
#define PSRAM_SIGNAL_BUFFER_SIZE (4 * 1024)

#define MAX_PSRAM_CAN_FRAMES     (PSRAM_CAN_BUFFER_SIZE / sizeof(CanFrame))

class PSRAMRingBuffer {
public:
    PSRAMRingBuffer();
    ~PSRAMRingBuffer();
    
    bool begin(size_t capacity);
    bool push(const CanFrame& frame);
    bool pop(CanFrame& frame);
    bool peek(CanFrame& frame);
    size_t available();
    size_t capacity();
    size_t freeSpace();
    bool isFull();
    bool isEmpty();
    void clear();
    void flush();
    
    CanFrame* getBuffer();
    size_t getHead();
    size_t getTail();

private:
    CanFrame* _buffer;
    size_t _capacity;
    volatile size_t _head;
    volatile size_t _tail;
    volatile size_t _count;
    SemaphoreHandle_t _mutex;
};

extern PSRAMRingBuffer canFrameBuffer;

bool initPSRAMBuffers();
void deinitPSRAMBuffers();

uint8_t* getSDWriteBuffer();
uint8_t* getSignalBuffer();

size_t getFreePSRAM();
size_t getUsedPSRAM();
size_t getTotalPSRAM();
void printMemoryStatus();

#endif // PSRAM_BUFFER_H