using System;
using System.Runtime.InteropServices;
using UnityEngine;

/// <summary>
/// C# interface for the native OpenVR access plugin.
/// This script provides access to the native plugin functions.
/// </summary>
public static class OpenVRNativeAccess
{
    // Import functions from the native plugin
    #if UNITY_STANDALONE_WIN
        private const string PluginName = "VRIMUDriver"; 
    #elif UNITY_STANDALONE_OSX
        private const string PluginName = "VRIMUDriver";
    #elif UNITY_STANDALONE_LINUX
        private const string PluginName = "VRIMUDriver";
    #else
        private const string PluginName = "VRIMUDriver";
    #endif

    // Initialize the plugin and connect to OpenVR
    [DllImport(PluginName)]
    public static extern bool InitializePlugin();

    // Shutdown the plugin and disconnect from OpenVR
    [DllImport(PluginName)]
    public static extern void ShutdownPlugin();

    // Get raw gyroscope data from the headset
    [DllImport(PluginName)]
    public static extern bool GetRawGyroscopeData(out float x, out float y, out float z);

    // Get raw accelerometer data from the headset
    [DllImport(PluginName)]
    public static extern bool GetRawAccelerometerData(out float x, out float y, out float z);

    // Check if the headset is connected
    [DllImport(PluginName)]
    public static extern bool IsHeadsetConnected();

    // Get the current tracking state
    [DllImport(PluginName)]
    public static extern bool IsTrackingValid();

    // Get the driver name
    [DllImport(PluginName)]
    public static extern IntPtr GetDriverName();

    // Helper method to get the driver name as a string
    public static string GetDriverNameString()
    {
        IntPtr namePtr = GetDriverName();
        if (namePtr != IntPtr.Zero)
        {
            return Marshal.PtrToStringAnsi(namePtr);
        }
        return "Unknown";
    }
}