#ifndef DMX_TRIPLE_BUFFER_H
#define DMX_TRIPLE_BUFFER_H

struct InternalBuffer {
    char data[512] = {0};
    bool is_fresh = false;
};

class DMXTripleBuffer
{
public:
    
    DMXTripleBuffer() {
        fill_buffer = &_buffers[0];
        drain_buffer = &_buffers[1];
        off_buffer = &_buffers[2];
    }
    
    void on_fill_complete() {
        fill_pos = 0;
        fill_buffer->is_fresh = true;
        std::swap(fill_buffer, off_buffer);
    }
    
    void on_drain_complete() {
        drain_pos = 0;
        drain_buffer->is_fresh = false;
        if (off_buffer->is_fresh) {
            std::swap(drain_buffer, off_buffer);
        }
    }
    InternalBuffer *fill_buffer, *drain_buffer, *off_buffer;
    size_t fill_pos = 0, drain_pos = 0;
        
private:
    InternalBuffer _buffers[3];
};

#endif