using System.Collections.Generic;
using UnityEngine.InputSystem.Controls;
using UnityEngine.InputSystem.Layouts;
using UnityEngine.InputSystem.XR;
using UnityEngine.Scripting;
using UnityEngine.XR.OpenXR.Input;

#if UNITY_EDITOR
using UnityEditor;
#endif

#if USE_INPUT_SYSTEM_POSE_CONTROL
using PoseControl = UnityEngine.InputSystem.XR.PoseControl;
#else
using PoseControl = UnityEngine.XR.OpenXR.Input.PoseControl;
#endif

namespace UnityEngine.XR.OpenXR.Features.Interactions
{
    /// <summary>
    /// This <see cref="OpenXRInteractionFeature"/> enables the use of KHR Simple Controllers interaction profiles in OpenXR.
    /// </summary>
#if UNITY_EDITOR
    [UnityEditor.XR.OpenXR.Features.OpenXRFeature(UiName = "Khronos Simple Controller Profile",
        BuildTargetGroups = new[] { BuildTargetGroup.Standalone, BuildTargetGroup.WSA, BuildTargetGroup.Android},
        Company = "Unity",
        Desc = "Allows for mapping input to the Khronos Simple Controller interaction profile.",
        DocumentationLink = Constants.k_DocumentationManualURL + "features/khrsimplecontrollerprofile.html",
        OpenxrExtensionStrings = "",
        Version = "0.0.1",
        Category = UnityEditor.XR.OpenXR.Features.FeatureCategory.Interaction,
        FeatureId = featureId)]
#endif
    public class KHRSimpleControllerProfile : OpenXRInteractionFeature
    {
        /// <summary>
        /// The feature id string. This is used to give the feature a well known id for reference.
        /// </summary>
        public const string featureId = "com.unity.openxr.feature.input.khrsimpleprofile";

        /// <summary>
        /// An Input System device based off the <a href="https://www.khronos.org/registry/OpenXR/specs/1.0/html/xrspec.html#_khronos_simple_controller_profile">Khronos Simple Controller interaction profile</a>. This device contains one haptic output motor.
        /// </summary>
        [Preserve, InputControlLayout(displayName = "Khronos Simple Controller (OpenXR)", commonUsages = new[] { "LeftHand", "RightHand" })]
        public class KHRSimpleController : XRControllerWithRumble
        {
            /// <summary>
            /// A [ButtonControl](xref:UnityEngine.InputSystem.Controls.ButtonControl) that represents the <see cref="KHRSimpleControllerProfile.select"/> OpenXR binding.
            /// </summary>
            [Preserve, InputControl(aliases = new[] { "Secondary", "selectbutton" }, usage = "PrimaryButton")]
            public ButtonControl select { get; private set; }

            /// <summary>
            /// A [ButtonControl](xref:UnityEngine.InputSystem.Controls.ButtonControl) that represents the <see cref="KHRSimpleControllerProfile.menu"/> OpenXR binding.
            /// </summary>
            [Preserve, InputControl(aliases = new[] { "Primary", "menubutton" }, usage = "MenuButton")]
            public ButtonControl menu { get; private set; }

            /// <summary>
            /// A <see cref="PoseControl"/> that represents information from the <see cref="KHRSimpleControllerProfile.grip"/> OpenXR binding.
            /// </summary>
            [Preserve, InputControl(offset = 0, aliases = new[] { "device", "gripPose" }, usage = "Device")]
            public PoseControl devicePose { get; private set; }

            /// <summary>
            /// A <see cref="PoseControl"/> that represents information from the <see cref="KHRSimpleControllerProfile.aim"/> OpenXR binding.
            /// </summary>
            [Preserve, InputControl(offset = 0, alias = "aimPose", usage = "Pointer")]
            public PoseControl pointer { get; private set; }

            /// <summary>
            /// A [ButtonControl](xref:UnityEngine.InputSystem.Controls.ButtonControl) required for backwards compatibility with the XRSDK layouts. This represents the overall tracking state of the device. This value is equivalent to mapping devicePose/isTracked.
            /// </summary>
            [Preserve, InputControl(offset = 2)]
            new public ButtonControl isTracked { get; private set; }

            /// <summary>
            /// A [IntegerControl](xref:UnityEngine.InputSystem.Controls.IntegerControl) required for backwards compatibility with the XRSDK layouts. This represents the bit flag set indicating what data is valid. This value is equivalent to mapping devicePose/trackingState.
            /// </summary>
            [Preserve, InputControl(offset = 4)]
            new public IntegerControl trackingState { get; private set; }

            /// <summary>
            /// A [Vector3Control](xref:UnityEngine.InputSystem.Controls.Vector3Control) required for backwards compatibility with the XRSDK layouts. This is the device position, or grip position. This value is equivalent to mapping devicePose/position.
            /// </summary>
            [Preserve, InputControl(offset = 8, alias = "gripPosition")]
            new public Vector3Control devicePosition { get; private set; }

            /// <summary>
            /// A [QuaternionControl](xref:UnityEngine.InputSystem.Controls.QuaternionControl) required for backwards compatibility with the XRSDK layouts. This is the device orientation, or grip orientation. This value is equivalent to mapping devicePose/rotation.
            /// </summary>
            [Preserve, InputControl(offset = 20, alias = "gripOrientation")]
            new public QuaternionControl deviceRotation { get; private set; }

            /// <summary>
            /// A [Vector3Control](xref:UnityEngine.InputSystem.Controls.Vector3Control) required for backwards compatibility with the XRSDK layouts. This is the pointer position. This value is equivalent to mapping pointerPose/position.
            /// </summary>
            [Preserve, InputControl(offset = 68)]
            public Vector3Control pointerPosition { get; private set; }

            /// <summary>
            /// A [QuaternionControl](xref:UnityEngine.InputSystem.Controls.QuaternionControl) required for backwards compatibility with the XRSDK layouts. This is the pointer rotation. This value is equivalent to mapping pointerPose/rotation.
            /// </summary>
            [Preserve, InputControl(offset = 80, alias = "pointerOrientation")]
            public QuaternionControl pointerRotation { get; private set; }

            /// <summary>
            /// A <see cref="HapticControl"/> that represents the <see cref="KHRSimpleControllerProfile.haptic"/> binding.
            /// </summary>
            [Preserve, InputControl(usage = "Haptic")]
            public HapticControl haptic { get; private set; }

            /// <inheritdoc  cref="OpenXRDevice"/>
            protected override void FinishSetup()
            {
                base.FinishSetup();
                menu = GetChildControl<ButtonControl>("menu");
                select = GetChildControl<ButtonControl>("select");
                devicePose = GetChildControl<PoseControl>("devicePose");
                pointer = GetChildControl<PoseControl>("pointer");

                isTracked = GetChildControl<ButtonControl>("isTracked");
                trackingState = GetChildControl<IntegerControl>("trackingState");
                devicePosition = GetChildControl<Vector3Control>("devicePosition");
                deviceRotation = GetChildControl<QuaternionControl>("deviceRotation");
                pointerPosition = GetChildControl<Vector3Control>("pointerPosition");
                pointerRotation = GetChildControl<QuaternionControl>("pointerRotation");

                haptic = GetChildControl<HapticControl>("haptic");
            }
        }

        /// <summary>
        /// OpenXR string that represents the <a href="https://www.khronos.org/registry/OpenXR/specs/1.0/html/xrspec.html#semantic-path-interaction-profiles">Interaction Profile.</a>
        /// </summary>
        public const string profile = "/interaction_profiles/khr/simple_controller";

        /// <summary>
        /// Constant for a boolean interaction binding '.../input/select/click' OpenXR Input Binding. Used by input subsystem to bind actions to physical inputs.
        /// </summary>
        public const string select = "/input/select/click";

        /// <summary>
        /// Constant for a boolean interaction binding '.../input/menu/click' OpenXR Input Binding. Used by input subsystem to bind actions to physical inputs.
        /// </summary>
        public const string menu = "/input/menu/click";

        /// <summary>
        /// Constant for a pose interaction binding '.../input/grip/pose' OpenXR Input Binding. Used by input subsystem to bind actions to physical inputs.
        /// </summary>
        public const string grip = "/input/grip/pose";

        /// <summary>
        /// Constant for a pose interaction binding '.../input/aim/pose' OpenXR Input Binding. Used by input subsystem to bind actions to physical inputs.
        /// </summary>
        public const string aim = "/input/aim/pose";

        /// <summary>
        /// Constant for a haptic interaction binding '.../input/output/haptic' OpenXR Input Binding. Used by input subsystem to bind actions to physical inputs.
        /// </summary>
        public const string haptic = "/output/haptic";

        private const string kDeviceLocalizedName = "KHR Simple Controller OpenXR";

        /// <summary>
        /// Registers the <see cref="KHRSimpleController"/> layout with the Input System.
        /// </summary>
        protected override void RegisterDeviceLayout()
        {
#if UNITY_EDITOR
            if (!OpenXRLoaderEnabledForSelectedBuildTarget(EditorUserBuildSettings.selectedBuildTargetGroup))
                return;
#endif
            InputSystem.InputSystem.RegisterLayout(typeof(KHRSimpleController),
                matches: new InputDeviceMatcher()
                    .WithInterface(XRUtilities.InterfaceMatchAnyVersion)
                    .WithProduct(kDeviceLocalizedName));
        }

        /// <summary>
        /// Removes the <see cref="KHRSimpleController"/> layout from the Input System.
        /// </summary>
        protected override void UnregisterDeviceLayout()
        {
#if UNITY_EDITOR
            if (!OpenXRLoaderEnabledForSelectedBuildTarget(EditorUserBuildSettings.selectedBuildTargetGroup))
                return;
#endif
            InputSystem.InputSystem.RemoveLayout(typeof(KHRSimpleController).Name);
        }

        /// <summary>
        /// Return device layout string that used for registering device for the Input System.
        /// </summary>
        /// <returns>Device layout string.</returns>
        protected override string GetDeviceLayoutName()
        {
            return nameof(KHRSimpleController);
        }

        /// <inheritdoc/>
        protected override void RegisterActionMapsWithRuntime()
        {
            ActionMapConfig actionMap = new ActionMapConfig()
            {
                name = "khrsimplecontroller",
                localizedName = kDeviceLocalizedName,
                desiredInteractionProfile = profile,
                manufacturer = "Khronos",
                serialNumber = "",
                deviceInfos = new List<DeviceConfig>()
                {
                    new DeviceConfig()
                    {
                        characteristics = (InputDeviceCharacteristics)(InputDeviceCharacteristics.HeldInHand | InputDeviceCharacteristics.TrackedDevice | InputDeviceCharacteristics.Controller | InputDeviceCharacteristics.Left),
                        userPath = UserPaths.leftHand
                    },
                    new DeviceConfig()
                    {
                        characteristics = (InputDeviceCharacteristics)(InputDeviceCharacteristics.HeldInHand | InputDeviceCharacteristics.TrackedDevice | InputDeviceCharacteristics.Controller | InputDeviceCharacteristics.Right),
                        userPath = UserPaths.rightHand
                    }
                },
                actions = new List<ActionConfig>()
                {
                    // Menu
                    new ActionConfig()
                    {
                        name = "select",
                        localizedName = "Select",
                        type = ActionType.Binary,
                        usages = new List<string>()
                        {
                            "PrimaryButton"
                        },
                        bindings = new List<ActionBinding>()
                        {
                            new ActionBinding()
                            {
                                interactionPath = select,
                                interactionProfileName = profile,
                            }
                        }
                    },
                    // Trigger Pressed
                    new ActionConfig()
                    {
                        name = "menu",
                        localizedName = "Menu",
                        type = ActionType.Binary,
                        usages = new List<string>()
                        {
                            "MenuButton"
                        },
                        bindings = new List<ActionBinding>()
                        {
                            new ActionBinding()
                            {
                                interactionPath = menu,
                                interactionProfileName = profile,
                            }
                        }
                    },
                    // Device Pose
                    new ActionConfig()
                    {
                        name = "devicePose",
                        localizedName = "Device Pose",
                        type = ActionType.Pose,
                        usages = new List<string>()
                        {
                            "Device"
                        },
                        bindings = new List<ActionBinding>()
                        {
                            new ActionBinding()
                            {
                                interactionPath = grip,
                                interactionProfileName = profile,
                            }
                        }
                    },
                    // Pointer Pose
                    new ActionConfig()
                    {
                        name = "pointer",
                        localizedName = "Pointer Pose",
                        type = ActionType.Pose,
                        usages = new List<string>()
                        {
                            "Pointer"
                        },
                        bindings = new List<ActionBinding>()
                        {
                            new ActionBinding()
                            {
                                interactionPath = aim,
                                interactionProfileName = profile,
                            }
                        }
                    },
                    // Haptics
                    new ActionConfig()
                    {
                        name = "haptic",
                        localizedName = "Haptic Output",
                        type = ActionType.Vibrate,
                        usages = new List<string>() { "Haptic" },
                        bindings = new List<ActionBinding>()
                        {
                            new ActionBinding()
                            {
                                interactionPath = haptic,
                                interactionProfileName = profile,
                            }
                        }
                    }
                }
            };

            AddActionMap(actionMap);
        }
    }
}