use super::device::DeviceType;

pub struct MemoryManager;

impl MemoryManager {
    pub fn allocate(device_type: DeviceType, size: usize) -> Result<*mut u8, String> {
        match device_type {
            DeviceType::Cpu => {
                // In a real implementation, this would use aligned_alloc or similar
                let layout = std::alloc::Layout::from_size_align(size, 64).map_err(|e| e.to_string())?;
                unsafe {
                    let ptr = std::alloc::alloc(layout);
                    if ptr.is_null() {
                        return Err("CPU Allocation failed".to_string());
                    }
                    Ok(ptr)
                }
            }
            DeviceType::Gpu => {
                // Placeholder for CUDA/Vulkan allocation
                Err("GPU Allocation not yet implemented (requires driver integration)".to_string())
            }
            DeviceType::Tpu => {
                Err("TPU Allocation not yet implemented".to_string())
            }
        }
    }

    pub fn deallocate(device_type: DeviceType, ptr: *mut u8, size: usize) {
        match device_type {
            DeviceType::Cpu => {
                let layout = std::alloc::Layout::from_size_align(size, 64).unwrap();
                unsafe {
                    std::alloc::dealloc(ptr, layout);
                }
            }
            _ => {
                // Handle other devices
                println!("Warning: Deallocation for {:?} not implemented", device_type);
            }
        }
    }
}
