using System;
using System.Runtime.InteropServices;

namespace LayersShell;

internal static class LayersNative
{
    private const string Dll = "layers_native";

    private static bool _startedUp;
    public static void StartupIfNeeded()
    {
        if (_startedUp) return;
        _startedUp = true;
        _ = layers_startup();
    }

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern int layers_startup();

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
    public static extern void layers_set_plugin_root([MarshalAs(UnmanagedType.LPStr)] string path);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern IntPtr layers_create_from_swap_chain_panel(IntPtr swapChainPanel, float width, float height, float scale);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern void layers_destroy(IntPtr handle);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern void layers_render(IntPtr handle);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern void layers_resize(IntPtr handle, float width, float height, float scale);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern void layers_mouse_move(IntPtr handle, float x, float y);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern void layers_mouse_left(IntPtr handle);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern void layers_mouse_button(IntPtr handle, float x, float y, uint button, [MarshalAs(UnmanagedType.I1)] bool pressed);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl)]
    public static extern void layers_mouse_scroll(IntPtr handle, float x, float y, float dx, float dy);

    [DllImport(Dll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
    public static extern void layers_key_event(IntPtr handle, uint named, [MarshalAs(UnmanagedType.LPStr)] string? utf8, uint mods, ushort nativeKeycode, [MarshalAs(UnmanagedType.I1)] bool pressed);
}

[System.Runtime.InteropServices.ComImport]
[System.Runtime.InteropServices.Guid("63aad0b8-7c24-40ff-85a8-640d944cc325")]
[System.Runtime.InteropServices.InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface ISwapChainPanelNative
{
    [PreserveSig]
    int SetSwapChain(IntPtr swapChain);
}