using System;
using XP.Hardware.MotionControl.Abstractions;
using XP.Hardware.MotionControl.Abstractions.Enums;
using XP.Hardware.Plc.Abstractions;

namespace XP.Hardware.MotionControl.Implementations
{
    /// <summary>
    /// 基于 PLC 的旋转轴实现 | PLC-based Rotary Axis Implementation
    /// 信号名称硬编码在 MotionSignalNames 中 | Signal names hardcoded in MotionSignalNames
    /// </summary>
    public class PlcRotaryAxis : RotaryAxisBase
    {
        private readonly ISignalDataService _signalService;
        private readonly string _readSignal;
        private readonly string _writeSignal;
        private readonly string _speedSignal;
        private readonly string _jogPosSignal;
        private readonly string _jogNegSignal;
        private readonly string _homeSignal;
        private readonly string _stopSignal;

        /// <summary>
        /// 构造函数 | Constructor
        /// </summary>
        public PlcRotaryAxis(
            RotaryAxisId axisId, double minAngle, double maxAngle, bool enabled,
            ISignalDataService signalService,
            string readSignal, string writeSignal, string speedSignal,
            string jogPosSignal, string jogNegSignal,
            string homeSignal, string stopSignal)
            : base(axisId, minAngle, maxAngle, enabled)
        {
            _signalService = signalService ?? throw new ArgumentNullException(nameof(signalService));
            _readSignal = readSignal;
            _writeSignal = writeSignal;
            _speedSignal = speedSignal;
            _jogPosSignal = jogPosSignal;
            _jogNegSignal = jogNegSignal;
            _homeSignal = homeSignal;
            _stopSignal = stopSignal;
        }

        /// <inheritdoc/>
        public override MotionResult MoveToTarget(double targetAngle, double? speed = null)
        {
            if (!_enabled) return MotionResult.Fail($"旋转轴 {_axisId} 已禁用，拒绝移动命令");
            if (!ValidateTarget(targetAngle)) return MotionResult.Fail($"目标角度 {targetAngle} 超出范围 [{_minAngle}, {_maxAngle}]");
            if (Status == AxisStatus.Moving) return MotionResult.Fail($"旋转轴 {_axisId} 正在运动中，拒绝重复命令");

            if (speed.HasValue)
                _signalService.EnqueueWrite(_speedSignal, (float)speed.Value);
            _signalService.EnqueueWrite(_writeSignal, (float)targetAngle);
            Status = AxisStatus.Moving;
            return MotionResult.Ok();
        }

        /// <inheritdoc/>
        public override MotionResult JogStart(bool positive)
        {
            if (!_enabled) return MotionResult.Fail($"旋转轴 {_axisId} 已禁用，拒绝 Jog 命令");
            if (Status == AxisStatus.Homing) return MotionResult.Fail($"旋转轴 {_axisId} 正在回零，拒绝 Jog 命令");

            _signalService.EnqueueWrite(positive ? _jogPosSignal : _jogNegSignal, true);
            return MotionResult.Ok();
        }

        /// <inheritdoc/>
        public override MotionResult JogStop()
        {
            if (!_enabled) return MotionResult.Fail($"旋转轴 {_axisId} 已禁用，拒绝 Jog 停止命令");
            _signalService.EnqueueWrite(_jogPosSignal, false);
            _signalService.EnqueueWrite(_jogNegSignal, false);
            return MotionResult.Ok();
        }

        /// <inheritdoc/>
        public override MotionResult Home()
        {
            if (!_enabled) return MotionResult.Fail($"旋转轴 {_axisId} 已禁用，拒绝回零命令");
            _signalService.EnqueueWrite(_homeSignal, true);
            Status = AxisStatus.Homing;
            return MotionResult.Ok();
        }

        /// <inheritdoc/>
        public override MotionResult Stop()
        {
            if (!_enabled) return MotionResult.Fail($"旋转轴 {_axisId} 已禁用，拒绝停止命令");
            _signalService.EnqueueWrite(_stopSignal, true);
            return MotionResult.Ok();
        }

        /// <inheritdoc/>
        public override void UpdateStatus()
        {
            if (!_enabled) return;
            ActualAngle = _signalService.GetValueByName<float>(_readSignal);
        }
    }
}