#pragma once
#include "Log.h"
#include <luna/Result.h>
#include <luna/SharedPtr.h>

class Device : public Shareable
{
  public:
    virtual Result<usize> read(u8* buf, usize offset, usize length) const = 0;

    virtual Result<usize> write(const u8* buf, usize offset, usize length) = 0;

    virtual Result<u64> query_shared_memory(off_t, usize)
    {
        return err(EACCES);
    }

    virtual Result<u64> ioctl(int, void*)
    {
        return err(ENOTTY);
    }

    virtual Result<u64> isatty() const
    {
        return err(ENOTTY);
    }

    virtual usize size() const
    {
        return 0;
    }

    virtual bool is_block_device() const
    {
        return false;
    }

    virtual Result<usize> block_size() const
    {
        // Block devices should override this function.
        kwarnln("Device::block_size() was called on a character device or block device without block size");

        return err(ENOTSUP);
    }

    // Path in devfs.
    virtual StringView device_path() const = 0;

    virtual bool will_block_if_read() const = 0;

    virtual ~Device() = default;

  protected:
    Option<u64> m_shmid;
};