// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// Ported from the Vulkan headers and corresponding dependencies.
// Original source is Copyright 2015-2023 The Khronos Group Inc. Licensed under the MIT license.
using System;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace Silk.NET.Vulkan;

[SupportedApiProfile("vulkan")]
public static unsafe partial class Vk
{
    private InstanceHandle? _currentInstance;
    private DeviceHandle? _currentDevice;
    public InstanceHandle? CurrentInstance
    {
        get => _currentInstance;
        set
        {
            if (_currentInstance != null && _currentInstance != value)
                throw new InvalidOperationException(
                    "CurrentInstance has already been set. Please create a new API instance so that the loaded function pointers can be kept separate."
                );
            _currentInstance = value;
        }
    }
    public DeviceHandle? CurrentDevice
    {
        get => _currentDevice;
        set
        {
            if (_currentDevice != null && _currentDevice != value)
                throw new InvalidOperationException(
                    "CurrentDevice has already been set. Please create a new API instance so that the loaded function pointers can be kept separate."
                );
            _currentDevice = value;
        }
    }

    [DllImport("vulkan", ExactSpelling = true, EntryPoint = "vkCreateDevice")]
    [SupportedApiProfile(
        "vulkan",
        ["VK_VERSION_1_0", "VK_VERSION_1_1", "VK_VERSION_1_2", "VK_VERSION_1_3", "VK_VERSION_1_4"],
        MinVersion = "1.0"
    )]
    private static extern Result CreateDeviceInternal(
        [NativeTypeName("VkPhysicalDevice")] PhysicalDeviceHandle physicalDevice,
        [NativeTypeName("const VkDeviceCreateInfo *")] DeviceCreateInfo* pCreateInfo,
        [NativeTypeName("const VkAllocationCallbacks *")] AllocationCallbacks* pAllocator,
        [NativeTypeName("VkDevice *")] DeviceHandle* pDevice
    );

    [SupportedApiProfile(
        "vulkan",
        ["VK_VERSION_1_0", "VK_VERSION_1_1", "VK_VERSION_1_2", "VK_VERSION_1_3", "VK_VERSION_1_4"],
        MinVersion = "1.0"
    )]
    public static Result CreateDevice(
        [NativeTypeName("VkPhysicalDevice")] PhysicalDeviceHandle physicalDevice,
        [NativeTypeName("const VkDeviceCreateInfo *")] DeviceCreateInfo* pCreateInfo,
        [NativeTypeName("const VkAllocationCallbacks *")] AllocationCallbacks* pAllocator,
        [NativeTypeName("VkDevice *")] DeviceHandle* pDevice
    )
    {
        Result result = CreateDeviceInternal(physicalDevice, pCreateInfo, pAllocator, pDevice);
        if (result == Result.Success)
        {
            CurrentDevice = *pDevice;
        }
        return result;
    }

    [DllImport("vulkan", ExactSpelling = true, EntryPoint = "vkCreateInstance")]
    [SupportedApiProfile(
        "vulkan",
        ["VK_VERSION_1_0", "VK_VERSION_1_1", "VK_VERSION_1_2", "VK_VERSION_1_3", "VK_VERSION_1_4"],
        MinVersion = "1.0"
    )]
    private static extern Result CreateInstanceInternal(
        [NativeTypeName("const VkInstanceCreateInfo *")] InstanceCreateInfo* pCreateInfo,
        [NativeTypeName("const VkAllocationCallbacks *")] AllocationCallbacks* pAllocator,
        [NativeTypeName("VkInstance *")] InstanceHandle* pInstance
    );

    [SupportedApiProfile(
        "vulkan",
        ["VK_VERSION_1_0", "VK_VERSION_1_1", "VK_VERSION_1_2", "VK_VERSION_1_3", "VK_VERSION_1_4"],
        MinVersion = "1.0"
    )]
    public static Result CreateInstance(
        [NativeTypeName("const VkInstanceCreateInfo *")] InstanceCreateInfo* pCreateInfo,
        [NativeTypeName("const VkAllocationCallbacks *")] AllocationCallbacks* pAllocator,
        [NativeTypeName("VkInstance *")] InstanceHandle* pInstance
    )
    {
        Result result = CreateInstanceInternal(pCreateInfo, pAllocator, pInstance);
        if (result == Result.Success)
        {
            CurrentInstance = *pInstance;
        }
        return result;
    }
}