#ifndef ARE_INCLUDE_RESOURCE_BUFFER_H
#define ARE_INCLUDE_RESOURCE_BUFFER_H

#include "basic/types.h"

namespace are {

/// @brief Buffer usage hint
enum class BufferUsage {
    STATIC_DRAW,
    DYNAMIC_DRAW,
    STREAM_DRAW
};

/// @brief Buffer type
enum class BufferType {
    VERTEX_BUFFER,
    INDEX_BUFFER,
    UNIFORM_BUFFER,
    SHADER_STORAGE_BUFFER
};

/// @brief GPU buffer resource
class Buffer {
public:
    /// @brief Constructor
    Buffer();

	Buffer(const Buffer&) = delete;
    Buffer& operator=(const Buffer&) = delete;

    Buffer(Buffer&& other) noexcept;
    Buffer& operator=(Buffer&& other) noexcept;
    
    /// @brief Destructor
    ~Buffer();
    
    /// @brief Create buffer
    /// @param type Buffer type
    /// @param size Buffer size in bytes
    /// @param data Initial data (nullptr for empty buffer)
    /// @param usage Usage hint
    /// @return True if creation succeeded
    bool create(BufferType type, size_t size, const void* data, BufferUsage usage);
    
    /// @brief Update buffer data
    /// @param offset Offset in bytes
    /// @param size Size in bytes
    /// @param data Data to upload
    void update(size_t offset, size_t size, const void* data);
    
    /// @brief Bind buffer
    void bind() const;
    
    /// @brief Bind buffer to binding point (for UBO/SSBO)
    /// @param binding_point Binding point index
    void bind_base(uint binding_point) const;
    
    /// @brief Unbind buffer
    void unbind() const;
    
    /// @brief Release buffer resources
    void release();
    
    /// @brief Get buffer handle
    /// @return Buffer handle
    BufferHandle get_handle() const { return handle_; }
    
    /// @brief Get buffer size
    /// @return Size in bytes
    size_t get_size() const { return size_; }
    
    /// @brief Get buffer type
    /// @return Buffer type
    BufferType get_type() const { return type_; }
    
    /// @brief Check if buffer is valid
    /// @return True if valid
    bool is_valid() const { return handle_ != INVALID_HANDLE; }

private:
    BufferHandle handle_;
    BufferType type_;
    size_t size_;
    BufferUsage usage_;
};

} // namespace are

#endif // ARE_INCLUDE_RESOURCE_BUFFER_H