using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Windows;
using Prism.Events;
using XP.Common.Localization;
using XP.Common.Logging.Interfaces;
using XP.Hardware.MotionControl.Abstractions;
using XP.Hardware.MotionControl.Abstractions.Enums;
using XP.Hardware.MotionControl.Abstractions.Events;
using XP.Hardware.MotionControl.Config;
using XP.Hardware.Plc.Abstractions;

namespace XP.Hardware.MotionControl.Services
{
    /// <summary>
    /// 运动控制业务服务实现 | Motion Control Business Service Implementation
    /// 封装所有运动控制业务规则，包括单轴/多轴移动、Jog控制、安全门控制和几何计算
    /// Encapsulates all motion control business rules including single/multi-axis move, jog control, safety door control and geometry calculation
    /// </summary>
    public class MotionControlService : IMotionControlService
    {
        private readonly IMotionSystem _motionSystem;
        private readonly GeometryCalculator _geometryCalculator;
        private readonly MotionControlConfig _config;
        private readonly IEventAggregator _eventAggregator;
        private readonly ILoggerService _logger;
        private readonly IPlcService _plcService;

        // 轮询定时器 | Polling timer
        private Timer _pollingTimer;
        private int _pollErrorCount = 0;

        /// <summary>
        /// 安全执行包装：捕获 PLC 异常避免崩溃 | Safe execution wrapper: catches PLC exceptions to prevent crash
        /// </summary>
        private MotionResult SafeExecute(Func<MotionResult> action, string operationName)
        {
            try
            {
                return action();
            }
            catch (Exception ex)
            {
                _logger.Error(ex, "{Operation} 执行异常 | {Operation} execution error: {Message}", operationName, operationName, ex.Message);
                return MotionResult.Fail($"{operationName} 异常: {ex.Message}");
            }
        }

        /// <summary>
        /// 构造函数 | Constructor
        /// 注入所有依赖项 | Inject all dependencies
        /// </summary>
        public MotionControlService(
            IMotionSystem motionSystem,
            GeometryCalculator geometryCalculator,
            MotionControlConfig config,
            IEventAggregator eventAggregator,
            ILoggerService logger,
            IPlcService plcService)
        {
            _motionSystem = motionSystem ?? throw new ArgumentNullException(nameof(motionSystem));
            _geometryCalculator = geometryCalculator ?? throw new ArgumentNullException(nameof(geometryCalculator));
            _config = config ?? throw new ArgumentNullException(nameof(config));
            _eventAggregator = eventAggregator ?? throw new ArgumentNullException(nameof(eventAggregator));
            // 使用模块化日志实例 | Use module-scoped logger instance
            _logger = (logger ?? throw new ArgumentNullException(nameof(logger)))
                .ForModule<MotionControlService>();
            _plcService = plcService ?? throw new ArgumentNullException(nameof(plcService));
        }

        #region 轮询控制 | Polling Control

        /// <summary>
        /// 启动 PLC 状态轮询 | Start PLC status polling
        /// 使用 System.Threading.Timer 以配置的 PollingInterval 周期执行轮询
        /// Uses System.Threading.Timer with configured PollingInterval for periodic polling
        /// </summary>
        public void StartPolling()
        {
            _pollingTimer?.Dispose();
            _pollingTimer = new Timer(OnPollingTick, null, 0, _config.PollingInterval);
            _logger.Info("轮询已启动，周期={Interval}ms | Polling started, interval={Interval}ms", _config.PollingInterval);
        }

        /// <summary>
        /// 停止 PLC 状态轮询 | Stop PLC status polling
        /// </summary>
        public void StopPolling()
        {
            _pollingTimer?.Dispose();
            _pollingTimer = null;
            _logger.Info("轮询已停止 | Polling stopped");
        }

        /// <summary>
        /// 轮询回调方法 | Polling tick callback
        /// 更新所有轴状态、重新计算几何参数、检测状态变化并发布事件
        /// Updates all axis status, recalculates geometry, detects status changes and publishes events
        /// </summary>
        private void OnPollingTick(object state)
        {
            // PLC 未连接时跳过轮询 | Skip polling when PLC is not connected
            if (!_plcService.IsConnected) return;

            // 连续错误过多时降频：每50次轮询才尝试一次 | Throttle when too many consecutive errors
            if (_pollErrorCount > 3)
            {
                // 仅递增计数，不执行轮询 | Only increment count, skip polling
                if (++_pollErrorCount % 50 != 0) return;
            }

            try
            {
                // 缓存旧的直线轴状态用于变化检测 | Cache old linear axis statuses for change detection
                var oldLinearStatuses = new Dictionary<AxisId, AxisStatus>();
                foreach (var kvp in _motionSystem.LinearAxes)
                    oldLinearStatuses[kvp.Key] = kvp.Value.Status;

                // 缓存旧的旋转轴状态 | Cache old rotary axis statuses
                var oldRotaryStatuses = new Dictionary<RotaryAxisId, AxisStatus>();
                foreach (var kvp in _motionSystem.RotaryAxes)
                    oldRotaryStatuses[kvp.Key] = kvp.Value.Status;

                // 缓存旧的门状态 | Cache old door status
                var oldDoorStatus = _motionSystem.SafetyDoor.Status;
                var oldInterlocked = _motionSystem.SafetyDoor.IsInterlocked;

                // 更新所有轴和门状态 | Update all axis and door status
                _motionSystem.UpdateAllStatus();

                // 重新计算几何参数并发布事件 | Recalculate geometry and publish event
                var geometry = GetCurrentGeometry();
                _eventAggregator.GetEvent<GeometryUpdatedEvent>()
                    .Publish(new GeometryData(geometry.FOD, geometry.FDD, geometry.Magnification));

                // 检测直线轴状态变化 | Detect linear axis status changes
                foreach (var kvp in _motionSystem.LinearAxes)
                {
                    if (oldLinearStatuses.TryGetValue(kvp.Key, out var oldStatus) && oldStatus != kvp.Value.Status)
                    {
                        _eventAggregator.GetEvent<AxisStatusChangedEvent>()
                            .Publish(new AxisStatusChangedData(kvp.Key, kvp.Value.Status));

                        // 轴状态变为 Error/Alarm 时同时发布 MotionErrorEvent | Publish MotionErrorEvent when status becomes Error/Alarm
                        if (kvp.Value.Status == AxisStatus.Error || kvp.Value.Status == AxisStatus.Alarm)
                        {
                            _eventAggregator.GetEvent<MotionErrorEvent>()
                                .Publish(new MotionErrorData(kvp.Key, $"直线轴 {kvp.Key} 状态变为 {kvp.Value.Status} | Linear axis {kvp.Key} status changed to {kvp.Value.Status}"));
                            _logger.Error(null, "直线轴 {AxisId} 状态变为 {Status} | Linear axis {AxisId} status changed to {Status}", kvp.Key, kvp.Value.Status);
                        }
                    }
                }

                // 检测旋转轴状态变化 | Detect rotary axis status changes
                foreach (var kvp in _motionSystem.RotaryAxes)
                {
                    if (oldRotaryStatuses.TryGetValue(kvp.Key, out var oldStatus) && oldStatus != kvp.Value.Status)
                    {
                        // 旋转轴状态变为 Error/Alarm 时记录日志 | Log when rotary axis status becomes Error/Alarm
                        if (kvp.Value.Status == AxisStatus.Error || kvp.Value.Status == AxisStatus.Alarm)
                        {
                            _logger.Error(null, "旋转轴 {AxisId} 状态变为 {Status} | Rotary axis {AxisId} status changed to {Status}", kvp.Key, kvp.Value.Status);
                        }
                    }
                }

                // 检测门状态变化 | Detect door status changes
                if (oldDoorStatus != _motionSystem.SafetyDoor.Status)
                {
                    _eventAggregator.GetEvent<DoorStatusChangedEvent>().Publish(_motionSystem.SafetyDoor.Status);
                }


                // 检测联锁状态变化 | Detect interlock status changes
                if (oldInterlocked != _motionSystem.SafetyDoor.IsInterlocked)
                {
                    _eventAggregator.GetEvent<DoorInterlockChangedEvent>()
                        .Publish(_motionSystem.SafetyDoor.IsInterlocked);
                    _logger.Info("门联锁状态变化：{IsInterlocked} | Door interlock status changed: {IsInterlocked}",
                        _motionSystem.SafetyDoor.IsInterlocked);
                }
                // 轮询成功，重置错误计数 | Poll succeeded, reset error count
                _pollErrorCount = 0;
            }
            catch (Exception ex)
            {
                _pollErrorCount++;
                // 仅首次和每50次记录日志，避免刷屏 | Log only first and every 50th to avoid spam
                if (_pollErrorCount == 1 || _pollErrorCount % 50 == 0)
                    _logger.Error(ex, "轮询异常（第{Count}次）| Polling error (#{Count}): {Message}", _pollErrorCount, _pollErrorCount, ex.Message);
            }
        }

        #endregion

        #region 单轴移动 | Single Axis Move

        /// <summary>
        /// 移动直线轴到目标位置 | Move linear axis to target position
        /// 包含边界检查和运动中防重入 | Includes boundary check and move-in-progress guard
        /// </summary>
        public MotionResult MoveToTarget(AxisId axisId, double target, double? speed = null)
        {
            var axis = _motionSystem.GetLinearAxis(axisId);

            // 运动中防重入检查 | Move-in-progress guard
            if (axis.Status == AxisStatus.Moving)
            {
                _logger.Warn("直线轴 {AxisId} 正在运动中，拒绝移动命令 | Linear axis {AxisId} is moving, move command rejected", axisId);
                return MotionResult.Fail($"直线轴 {axisId} 正在运动中，拒绝重复命令 | Linear axis {axisId} is moving, duplicate command rejected");
            }

            // 委托给轴实现（轴内部包含边界检查）| Delegate to axis implementation (axis contains boundary check)
            var result = axis.MoveToTarget(target, speed ?? _config.DefaultVelocity);

            if (result.Success)
            {
                _logger.Info("直线轴 {AxisId} 移动命令已发送，目标位置={Target}mm | Linear axis {AxisId} move command sent, target={Target}mm", axisId, target);
            }
            else
            {
                _logger.Warn("直线轴 {AxisId} 移动命令被拒绝：{Reason} | Linear axis {AxisId} move command rejected: {Reason}", axisId, result.ErrorMessage);
            }

            return result;
        }

        /// <summary>
        /// 移动旋转轴到目标角度 | Move rotary axis to target angle
        /// 包含禁用轴检查和边界检查 | Includes disabled axis check and boundary check
        /// </summary>
        public MotionResult MoveRotaryToTarget(RotaryAxisId axisId, double targetAngle, double? speed = null)
        {
            var axis = _motionSystem.GetRotaryAxis(axisId);

            // 禁用轴检查 | Disabled axis check
            if (!axis.Enabled)
            {
                _logger.Warn("旋转轴 {AxisId} 已禁用，拒绝移动命令 | Rotary axis {AxisId} is disabled, move command rejected", axisId);
                return MotionResult.Fail($"旋转轴 {axisId} 已禁用 | Rotary axis {axisId} is disabled");
            }

            // 运动中防重入检查 | Move-in-progress guard
            if (axis.Status == AxisStatus.Moving)
            {
                _logger.Warn("旋转轴 {AxisId} 正在运动中，拒绝移动命令 | Rotary axis {AxisId} is moving, move command rejected", axisId);
                return MotionResult.Fail($"旋转轴 {axisId} 正在运动中，拒绝重复命令 | Rotary axis {axisId} is moving, duplicate command rejected");
            }

            // 委托给轴实现（轴内部包含边界检查）| Delegate to axis implementation (axis contains boundary check)
            var result = axis.MoveToTarget(targetAngle, speed ?? _config.DefaultVelocity);

            if (result.Success)
            {
                _logger.Info("旋转轴 {AxisId} 移动命令已发送，目标角度={TargetAngle}° | Rotary axis {AxisId} move command sent, target={TargetAngle}°", axisId, targetAngle);
            }
            else
            {
                _logger.Warn("旋转轴 {AxisId} 移动命令被拒绝：{Reason} | Rotary axis {AxisId} move command rejected: {Reason}", axisId, result.ErrorMessage);
            }

            return result;
        }

        #endregion

        #region 多轴联动 | Multi-Axis Coordinated Move

        /// <summary>
        /// 多轴联动移动 | Multi-axis coordinated move
        /// 原子性边界检查：先验证所有目标，任意轴越界则拒绝整个命令
        /// Atomic boundary check: validate all targets first, reject entire command if any axis out of range
        /// </summary>
        public MotionResult MoveAllToTarget(Dictionary<AxisId, double> targets)
        {
            if (targets == null || targets.Count == 0)
            {
                _logger.Warn("多轴联动目标为空，拒绝命令 | Multi-axis targets empty, command rejected");
                return MotionResult.Fail("多轴联动目标为空 | Multi-axis targets empty");
            }

            // 原子性边界检查：收集所有错误 | Atomic boundary check: collect all errors
            var errors = new List<string>();

            foreach (var kvp in targets)
            {
                var axis = _motionSystem.GetLinearAxis(kvp.Key);

                // 运动中防重入检查 | Move-in-progress guard
                if (axis.Status == AxisStatus.Moving)
                {
                    errors.Add($"直线轴 {kvp.Key} 正在运动中 | Linear axis {kvp.Key} is moving");
                    continue;
                }

                // 通过轴的 ValidateTarget 检查边界（需要转换为 LinearAxisBase）
                // 直接尝试调用 MoveToTarget 前先做边界预检查
                // 使用配置中的 Min/Max 进行边界检查 | Use config Min/Max for boundary check
                if (_config.LinearAxes.TryGetValue(kvp.Key, out var axisConfig))
                {
                    if (kvp.Value < axisConfig.Min || kvp.Value > axisConfig.Max)
                    {
                        errors.Add($"直线轴 {kvp.Key} 目标位置 {kvp.Value} 超出范围 [{axisConfig.Min}, {axisConfig.Max}] | " +
                                   $"Linear axis {kvp.Key} target {kvp.Value} out of range [{axisConfig.Min}, {axisConfig.Max}]");
                    }
                }
            }

            // 如果有任何错误，拒绝整个命令 | If any errors, reject entire command
            if (errors.Count > 0)
            {
                var allErrors = string.Join("; ", errors);
                _logger.Warn("多轴联动边界检查失败：{Errors} | Multi-axis boundary check failed: {Errors}", allErrors);
                return MotionResult.Fail(allErrors);
            }

            // 所有检查通过，同时向所有轴写入目标 | All checks passed, write targets to all axes simultaneously
            foreach (var kvp in targets)
            {
                var axis = _motionSystem.GetLinearAxis(kvp.Key);
                axis.MoveToTarget(kvp.Value);
            }

            _logger.Info("多轴联动移动命令已发送，轴数={Count} | Multi-axis move command sent, axis count={Count}", targets.Count);
            return MotionResult.Ok();
        }

        /// <summary>
        /// 停止所有已启用轴 | Stop all enabled axes
        /// 包括所有直线轴和已启用的旋转轴 | Includes all linear axes and enabled rotary axes
        /// </summary>
        public MotionResult StopAll()
        {
            // 停止所有直线轴 | Stop all linear axes
            foreach (var kvp in _motionSystem.LinearAxes)
            {
                kvp.Value.Stop();
            }

            // 停止所有已启用的旋转轴 | Stop all enabled rotary axes
            foreach (var kvp in _motionSystem.RotaryAxes)
            {
                if (kvp.Value.Enabled)
                {
                    kvp.Value.Stop();
                }
            }

            _logger.Info("全部停止命令已发送 | Stop all command sent");
            return MotionResult.Ok();
        }

        /// <summary>
        /// 所有已启用轴回零 | Home all enabled axes
        /// 包括所有直线轴和已启用的旋转轴 | Includes all linear axes and enabled rotary axes
        /// </summary>
        public MotionResult HomeAll()
        {
            // 回零所有直线轴 | Home all linear axes
            foreach (var kvp in _motionSystem.LinearAxes)
            {
                kvp.Value.Home();
            }

            // 回零所有已启用的旋转轴 | Home all enabled rotary axes
            foreach (var kvp in _motionSystem.RotaryAxes)
            {
                if (kvp.Value.Enabled)
                {
                    kvp.Value.Home();
                }
            }

            _logger.Info("全部回零命令已发送 | Home all command sent");
            return MotionResult.Ok();
        }

        #endregion

        #region Jog 控制 | Jog Control

        /// <summary>
        /// 直线轴 Jog 启动 | Start linear axis jog
        /// Homing 状态下拒绝 Jog 命令 | Rejects jog when axis is homing
        /// </summary>
        public MotionResult JogStart(AxisId axisId, bool positive)
        {
            var axis = _motionSystem.GetLinearAxis(axisId);

            // Homing 状态检查 | Homing status check
            if (axis.Status == AxisStatus.Homing)
            {
                _logger.Warn("直线轴 {AxisId} 正在回零，拒绝 Jog 命令 | Linear axis {AxisId} is homing, jog command rejected", axisId);
                return MotionResult.Fail($"直线轴 {axisId} 正在回零，拒绝 Jog 命令 | Linear axis {axisId} is homing, jog rejected");
            }

            var result = axis.JogStart(positive);

            if (result.Success)
            {
                var direction = positive ? "正向 | positive" : "反向 | negative";
                _logger.Info("直线轴 {AxisId} Jog 启动，方向={Direction} | Linear axis {AxisId} jog started, direction={Direction}", axisId, direction);
            }
            else
            {
                _logger.Warn("直线轴 {AxisId} Jog 启动被拒绝：{Reason} | Linear axis {AxisId} jog start rejected: {Reason}", axisId, result.ErrorMessage);
            }

            return result;
        }

        /// <summary>
        /// 直线轴 Jog 停止 | Stop linear axis jog
        /// </summary>
        public MotionResult JogStop(AxisId axisId)
        {
            var axis = _motionSystem.GetLinearAxis(axisId);
            var result = axis.JogStop();

            if (result.Success)
            {
                _logger.Info("直线轴 {AxisId} Jog 已停止 | Linear axis {AxisId} jog stopped", axisId);
            }

            return result;
        }

        /// <summary>
        /// 旋转轴 Jog 启动 | Start rotary axis jog
        /// Homing 状态下拒绝 Jog 命令，禁用轴拒绝命令 | Rejects jog when homing or disabled
        /// </summary>
        public MotionResult JogRotaryStart(RotaryAxisId axisId, bool positive)
        {
            var axis = _motionSystem.GetRotaryAxis(axisId);

            // 禁用轴检查 | Disabled axis check
            if (!axis.Enabled)
            {
                _logger.Warn("旋转轴 {AxisId} 已禁用，拒绝 Jog 命令 | Rotary axis {AxisId} is disabled, jog command rejected", axisId);
                return MotionResult.Fail($"旋转轴 {axisId} 已禁用 | Rotary axis {axisId} is disabled");
            }

            // Homing 状态检查 | Homing status check
            if (axis.Status == AxisStatus.Homing)
            {
                _logger.Warn("旋转轴 {AxisId} 正在回零，拒绝 Jog 命令 | Rotary axis {AxisId} is homing, jog command rejected", axisId);
                return MotionResult.Fail($"旋转轴 {axisId} 正在回零，拒绝 Jog 命令 | Rotary axis {axisId} is homing, jog rejected");
            }

            var result = axis.JogStart(positive);

            if (result.Success)
            {
                var direction = positive ? "正向 | positive" : "反向 | negative";
                _logger.Info("旋转轴 {AxisId} Jog 启动，方向={Direction} | Rotary axis {AxisId} jog started, direction={Direction}", axisId, direction);
            }
            else
            {
                _logger.Warn("旋转轴 {AxisId} Jog 启动被拒绝：{Reason} | Rotary axis {AxisId} jog start rejected: {Reason}", axisId, result.ErrorMessage);
            }

            return result;
        }

        /// <summary>
        /// 旋转轴 Jog 停止 | Stop rotary axis jog
        /// </summary>
        public MotionResult JogRotaryStop(RotaryAxisId axisId)
        {
            var axis = _motionSystem.GetRotaryAxis(axisId);

            // 禁用轴检查 | Disabled axis check
            if (!axis.Enabled)
            {
                _logger.Warn("旋转轴 {AxisId} 已禁用，拒绝 Jog 停止命令 | Rotary axis {AxisId} is disabled, jog stop rejected", axisId);
                return MotionResult.Fail($"旋转轴 {axisId} 已禁用 | Rotary axis {axisId} is disabled");
            }

            var result = axis.JogStop();

            if (result.Success)
            {
                _logger.Info("旋转轴 {AxisId} Jog 已停止 | Rotary axis {AxisId} jog stopped", axisId);
            }

            return result;
        }

        #endregion

        #region 安全门控制 | Safety Door Control

        /// <summary>
        /// 开门（含联锁检查）| Open door (with interlock check)
        /// 联锁信号有效时拒绝开门 | Rejects when interlock is active
        /// </summary>
        public MotionResult OpenDoor()
        {
            var door = _motionSystem.SafetyDoor;

            // 检查联锁信号 | Check interlock signal
            if (door.IsInterlocked)
            {
                _logger.Warn("联锁信号有效，禁止开门 | Interlock active, door open blocked");
                return MotionResult.Fail("联锁信号有效，禁止开门 | Interlock active, door open blocked");
            }

            // TODO: 预留射线源联锁扩展点 | Reserved extension point for ray source interlock
            // 当需要实现射线源联锁时，通过订阅 RaySourceStatusChangedEvent 缓存射线源状态
            // When implementing ray source interlock, subscribe to RaySourceStatusChangedEvent to cache ray source status
            // 在此处检查 _isRaySourceOn，若为 true 则拒绝开门
            // Check _isRaySourceOn here, reject door open if true
            // 示例代码 | Example code:
            // if (_isRaySourceOn)
            // {
            //     _logger.Warn("射线源开启中，禁止开门 | Ray source is on, door open blocked");
            //     return MotionResult.Fail("射线源开启中，禁止开门 | Ray source is on, door open blocked");
            // }

            var result = door.Open();

            if (result.Success)
            {
                _eventAggregator.GetEvent<DoorStatusChangedEvent>().Publish(DoorStatus.Opening);
                _logger.Info("开门命令已发送 | Open door command sent");
            }
            else
            {
                _logger.Warn("开门命令被拒绝：{Reason} | Open door command rejected: {Reason}", result.ErrorMessage);
            }

            return result;
        }

        /// <summary>
        /// 关门 | Close door
        /// </summary>
        public MotionResult CloseDoor()
        {
            var door = _motionSystem.SafetyDoor;
            var result = door.Close();

            if (result.Success)
            {
                _eventAggregator.GetEvent<DoorStatusChangedEvent>().Publish(DoorStatus.Closing);
                _logger.Info("关门命令已发送 | Close door command sent");
            }
            else
            {
                _logger.Warn("关门命令被拒绝：{Reason} | Close door command rejected: {Reason}", result.ErrorMessage);
            }

            return result;
        }

        /// <summary>
        /// 停止门运动 | Stop door movement
        /// </summary>
        public MotionResult StopDoor()
        {
            var door = _motionSystem.SafetyDoor;
            var result = door.Stop();

            if (result.Success)
            {
                _logger.Info("停止门命令已发送 | Stop door command sent");
            }

            return result;
        }

        #endregion

        #region 几何计算 | Geometry Calculation

        /// <summary>
        /// 获取当前几何参数（正算）| Get current geometry parameters (forward calculation)
        /// 根据当前轴位置和探测器摆动角度计算 FOD、FDD 和放大倍率
        /// Calculates FOD, FDD and magnification from current axis positions and detector swing angle
        /// </summary>
        public (double FOD, double FDD, double Magnification) GetCurrentGeometry()
        {
            // 获取 SourceZ 和 DetectorZ 的实际位置 | Get actual positions of SourceZ and DetectorZ
            var sourceZ = _motionSystem.GetLinearAxis(AxisId.SourceZ);
            var detectorZ = _motionSystem.GetLinearAxis(AxisId.DetectorZ);

            // 计算绝对坐标 | Calculate absolute coordinates
            var sourceZAbsolute = _geometryCalculator.CalcAbsolutePosition(
                sourceZ.ActualPosition, _config.Geometry.SourceZOrigin);
            var detectorZAbsolute = _geometryCalculator.CalcAbsolutePosition(
                detectorZ.ActualPosition, _config.Geometry.DetectorZOrigin);

            // 获取探测器摆动角度 | Get detector swing angle
            var detectorSwing = _motionSystem.GetRotaryAxis(RotaryAxisId.DetectorSwing);
            double swingAngle = detectorSwing.ActualAngle;

            // 计算 FDD（考虑摆动）| Calculate FDD with swing
            var fdd = _geometryCalculator.CalcFDD(
                sourceZAbsolute, detectorZAbsolute,
                _config.Geometry.SwingPivotOffset, swingAngle, _config.Geometry.SwingRadius);

            // 计算 FOD（考虑摆动）| Calculate FOD with swing
            var fod = _geometryCalculator.CalcFOD(
                sourceZAbsolute, _config.Geometry.StageRotationCenterZ,
                detectorZAbsolute, _config.Geometry.SwingPivotOffset,
                swingAngle, _config.Geometry.SwingRadius);

            // 计算放大倍率 | Calculate magnification
            var magnification = _geometryCalculator.CalcMagnification(fdd, fod);

            return (fod, fdd, magnification);
        }

        /// <summary>
        /// 应用几何参数（反算，由 FOD 和 FDD）| Apply geometry (inverse, from FOD and FDD)
        /// 根据当前探测器摆动角度，计算并移动 SourceZ 和 DetectorZ 到目标位置
        /// Calculates and moves SourceZ and DetectorZ to target positions based on current detector swing angle
        /// </summary>
        public MotionResult ApplyGeometry(double targetFOD, double targetFDD)
        {
            // 获取当前探测器摆动角度 | Get current detector swing angle
            var detectorSwing = _motionSystem.GetRotaryAxis(RotaryAxisId.DetectorSwing);
            double swingAngle = detectorSwing.ActualAngle;

            // 反算轴目标位置（考虑摆动）| Inverse calculate axis target positions with swing
            var (sourceZTarget, detectorZTarget, errorMessage) = _geometryCalculator.CalcAxisTargets(
                targetFOD, targetFDD,
                _config.Geometry.StageRotationCenterZ,
                _config.Geometry.SourceZOrigin,
                _config.Geometry.DetectorZOrigin,
                _config.Geometry.SwingPivotOffset,
                swingAngle,
                _config.Geometry.SwingRadius);

            // 反算失败（如目标不可达）| Inverse calculation failed (e.g. target unreachable)
            if (errorMessage != null)
            {
                _logger.Warn("几何反算失败：{Reason} | Geometry inverse failed: {Reason}", errorMessage);
                MessageBox.Show(
                    LocalizationHelper.Get("MC_GeometryCalcFailed", errorMessage),
                    LocalizationHelper.Get("MC_Geometry_Title"),
                    MessageBoxButton.OK, MessageBoxImage.Warning);
                return MotionResult.Fail(errorMessage);
            }

            // 获取 SourceZ 和 DetectorZ 的配置范围 | Get SourceZ and DetectorZ config ranges
            var sourceZConfig = _config.LinearAxes[AxisId.SourceZ];
            var detectorZConfig = _config.LinearAxes[AxisId.DetectorZ];

            // 边界检查 | Boundary validation
            var validateResult = _geometryCalculator.ValidateTargets(
                sourceZTarget, detectorZTarget,
                sourceZConfig.Min, sourceZConfig.Max,
                detectorZConfig.Min, detectorZConfig.Max);

            if (!validateResult.Success)
            {
                _logger.Warn("几何反算边界检查失败：{Reason} | Geometry inverse boundary check failed: {Reason}", validateResult.ErrorMessage);
                MessageBox.Show(
                    LocalizationHelper.Get("MC_GeometryCalcFailed", validateResult.ErrorMessage),
                    LocalizationHelper.Get("MC_Geometry_Title"),
                    MessageBoxButton.OK, MessageBoxImage.Warning);
                return validateResult;
            }

            // 弹出确认窗口，显示计算结果 | Show confirmation dialog with calculation results
            var confirmMessage = LocalizationHelper.Get("MC_GeometryConfirm",
                targetFOD, targetFDD, swingAngle, sourceZTarget, detectorZTarget);
            var confirmResult = MessageBox.Show(
                confirmMessage,
                LocalizationHelper.Get("MC_Geometry_Title"),
                MessageBoxButton.OKCancel, MessageBoxImage.Question);

            if (confirmResult != MessageBoxResult.OK)
            {
                _logger.Info("用户取消几何反算移动 | User cancelled geometry inverse move");
                return MotionResult.Fail(LocalizationHelper.Get("MC_GeometryCancelled"));
            }

            // 同时移动 SourceZ 和 DetectorZ（多轴联动）| Move SourceZ and DetectorZ simultaneously (coordinated move)
            var targets = new Dictionary<AxisId, double>
            {
                { AxisId.SourceZ, sourceZTarget },
                { AxisId.DetectorZ, detectorZTarget }
            };

            var moveResult = MoveAllToTarget(targets);

            if (moveResult.Success)
            {
                _logger.Info("几何反算移动命令已发送，目标 FOD={TargetFOD}mm, FDD={TargetFDD}mm, 摆动角度={SwingAngle}° | " +
                    "Geometry inverse move sent, target FOD={TargetFOD}mm, FDD={TargetFDD}mm, swing={SwingAngle}°",
                    targetFOD, targetFDD, swingAngle);
            }

            return moveResult;
        }

        /// <summary>
        /// 应用几何参数（反算，由 FOD 和放大倍率）| Apply geometry (inverse, from FOD and magnification)
        /// 先计算 FDD = M × FOD，再移动轴 | Calculates FDD = M × FOD, then moves axes
        /// </summary>
        public MotionResult ApplyGeometryByMagnification(double targetFOD, double magnification)
        {
            // 计算 FDD = M × FOD | Calculate FDD = M × FOD
            var targetFDD = magnification * targetFOD;

            _logger.Info("由放大倍率计算 FDD：M={Magnification}, FOD={FOD}mm, FDD={FDD}mm | Calculate FDD from magnification: M={Magnification}, FOD={FOD}mm, FDD={FDD}mm",
                magnification, targetFOD, targetFDD);

            return ApplyGeometry(targetFOD, targetFDD);
        }


        /// <inheritdoc/>
        public (double SourceZTarget, double DetectorZTarget, string ErrorMessage) CalculateGeometryTargets(double targetFOD, double targetFDD)
        {
            // 获取当前探测器摆动角度 | Get current detector swing angle
            var detectorSwing = _motionSystem.GetRotaryAxis(RotaryAxisId.DetectorSwing);
            double swingAngle = detectorSwing.ActualAngle;

            // 反算轴目标位置（考虑摆动）| Inverse calculate axis target positions with swing
            var (sourceZTarget, detectorZTarget, errorMessage) = _geometryCalculator.CalcAxisTargets(
                targetFOD, targetFDD,
                _config.Geometry.StageRotationCenterZ,
                _config.Geometry.SourceZOrigin,
                _config.Geometry.DetectorZOrigin,
                _config.Geometry.SwingPivotOffset,
                swingAngle,
                _config.Geometry.SwingRadius);

            if (errorMessage != null)
            {
                _logger.Warn("几何反算失败：{Reason} | Geometry inverse failed: {Reason}", errorMessage);
                MessageBox.Show(
                    LocalizationHelper.Get("MC_GeometryCalcFailed", errorMessage),
                    LocalizationHelper.Get("MC_Geometry_Title"),
                    MessageBoxButton.OK, MessageBoxImage.Warning);
                return (0, 0, errorMessage);
            }

            // 边界检查 | Boundary validation
            var sourceZConfig = _config.LinearAxes[AxisId.SourceZ];
            var detectorZConfig = _config.LinearAxes[AxisId.DetectorZ];
            var validateResult = _geometryCalculator.ValidateTargets(
                sourceZTarget, detectorZTarget,
                sourceZConfig.Min, sourceZConfig.Max,
                detectorZConfig.Min, detectorZConfig.Max);

            if (!validateResult.Success)
            {
                _logger.Warn("几何反算边界检查失败：{Reason} | Geometry inverse boundary check failed: {Reason}", validateResult.ErrorMessage);
                MessageBox.Show(
                    LocalizationHelper.Get("MC_GeometryCalcFailed", validateResult.ErrorMessage),
                    LocalizationHelper.Get("MC_Geometry_Title"),
                    MessageBoxButton.OK, MessageBoxImage.Warning);
                return (0, 0, validateResult.ErrorMessage);
            }

            _logger.Info("几何反算计算完成，SourceZ={SourceZ}, DetectorZ={DetectorZ} | Geometry inverse calculated, SourceZ={SourceZ}, DetectorZ={DetectorZ}",
                sourceZTarget, detectorZTarget);
            return (sourceZTarget, detectorZTarget, null);
        }


        #endregion
    }
}