using MvCamCtrl.NET;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TeamAAS_VP.Core.Cameras;
using TeamAAS_VP.Interfaces;
using TeamAAS_VP.Models;

namespace TeamAAS_VP.Services
{
    public class CameraService : ICameraService, IDisposable
    {
        private readonly Dictionary<Guid, ICamera> _CameraCollection;
        private readonly object _sync = new object();

        public CameraService()
        {
            _CameraCollection = new Dictionary<Guid, ICamera>();
        }

        public bool CreateCamera(Guid id, CameraInfo cameraInfo)
        {
            if (cameraInfo == null) throw new ArgumentNullException(nameof(cameraInfo));

            var camera = CreateCameraInstance(id, cameraInfo);

            lock (_sync)
            {
                if (_CameraCollection.ContainsKey(id))
                {
                    var currenCamera = _CameraCollection[id];
                    try
                    {
                        currenCamera.CloseDevice();
                    }
                    catch
                    {
                        // 忽略关闭异常
                    }
                }

                _CameraCollection[id] = camera;
            }

            return true;
        }

        public Task<bool> CreateCameraAsync(Guid id, CameraInfo cameraInfo)
        {
            return Task.Run(() => CreateCamera(id, cameraInfo));
        }

        public ICamera GetCamera(Guid id)
        {
            lock (_sync)
            {
                if (_CameraCollection.TryGetValue(id, out var cam))
                    return cam;
            }
            return null;
        }

        public Task<ICamera> GetCameraAsync(Guid id)
        {
            return Task.Run(() =>
            {
                return GetCamera(id);
            });
        }

        public void UnRegisterCamera(Guid id)
        {
            ICamera camera = null;
            lock (_sync)
            {
                if (_CameraCollection.TryGetValue(id, out camera))
                {
                    _CameraCollection.Remove(id);
                }
            }

            if (camera != null)
            {
                try
                {
                    camera.CloseDevice();
                }
                catch
                {
                    // 忽略关闭异常
                }
            }
        }

        public Task UnRegisterCameraAsync(Guid id)
        {
            return Task.Run(() => UnRegisterCamera(id));
        }

        public IReadOnlyCollection<ICamera> GetAllCameras()
        {
            lock (_sync)
            {
                return _CameraCollection.Values.ToList().AsReadOnly();
            }
        }

        public Task<IReadOnlyCollection<ICamera>> GetAllCamerasAsync()
        {
            return Task.Run(() =>
            {
                return GetAllCameras();
            });
        }

        public bool TryGetCamera(Guid id, out ICamera camera)
        {
            lock (_sync)
            {
                return _CameraCollection.TryGetValue(id, out camera);
            }
        }

        public Task<(bool found, ICamera camera)> TryGetCameraAsync(Guid id)
        {

            return Task.Run(() =>
            {
                ICamera camera;
                bool found;
                lock (_sync)
                {
                    found = _CameraCollection.TryGetValue(id, out camera);
                }
                return (found, camera);
            });
        }

        public bool ContainsCamera(Guid id)
        {
            lock (_sync)
            {
                return _CameraCollection.ContainsKey(id);
            }
        }

        public Task<bool> ContainsCameraAsync(Guid id)
        {
            return Task.Run(() =>
            {
                return ContainsCamera(id);
            });
        }

        public bool RemoveCamera(Guid id)
        {
            ICamera camera = null;
            lock (_sync)
            {
                if (_CameraCollection.TryGetValue(id, out camera))
                {
                    _CameraCollection.Remove(id);
                }
            }
            if (camera != null)
            {
                try
                {
                    camera.CloseDevice();
                }
                catch
                {
                    // 忽略关闭异常
                }
                return true;
            }
            return false;
        }

        public Task<bool> RemoveCameraAsync(Guid id)
        {
            return Task.Run(() =>
            {
                return RemoveCamera(id);
            });
        }

        public ICamera GetCameraByNumber(int number)
        {
            if (TryFindCameraByNumber(number, out _, out var camera))
                return camera;
            return null;
        }

        public Task<ICamera> GetCameraByNumberAsync(int number)
        {
            return Task.Run(() =>
            {
                return GetCameraByNumber(number);
            });
        }

        public Task UnRegisterCameraByNumberAsync(int number)
        {
            return Task.Run(() =>
            {
                UnRegisterCameraByNumber(number);
            });
        }

        public void UnRegisterCameraByNumber(int number)
        {
            if (TryFindCameraByNumber(number, out var id, out var camera))
            {
                UnRegisterCamera(id);
            }
        }

        /// <summary>
        /// 移除所有相机
        /// </summary>
        public void RemoveAllCameras()
        {
            //依次移除每一个相机，确保资源释放
            List<Guid> cameraIds;
            lock (_sync)
            {
                cameraIds = _CameraCollection.Keys.ToList();
            }
            foreach (var id in cameraIds)
            {
                RemoveCamera(id);
            }
        }

        /// <summary>
        /// 初始化所有相机
        /// </summary>
        /// <param name="cameras"></param>
        /// <returns></returns>
        public  (bool IsSucceed, string Message) InitializeAllCameras(CameraInfo[] cameras)
        {
            //清除现有相机
            RemoveAllCameras();

            foreach (var camInfo in cameras)
            {
                var camera = CreateCameraInstance(camInfo.Id, camInfo);
                lock (_sync)
                {
                    _CameraCollection[camInfo.Id] = camera;
                }
            }
            bool allConnected = true;
            StringBuilder errorMessages = new StringBuilder();

            //获取所有相机并尝试打开设备
            foreach (var camInfo in cameras)
            {
                if (TryGetCamera(camInfo.Id, out var camera))
                {
                    bool opened = camera.OpenDevice();
                    if (!opened)
                    {
                        allConnected = false;
                        errorMessages.AppendLine($"相机 {camInfo.CameraName}（编号: {camInfo.CameraNo}）打开失败: {camera.ErrorMessage}");
                    }
                }
                else
                {
                    allConnected = false;
                    errorMessages.AppendLine($"未找到相机 {camInfo.CameraName}（编号: {camInfo.CameraNo}）的实例。");
                }
            }

            if (allConnected)
            {
                return (true, "所有相机均已成功初始化并连接。");
            }
            else
            {
                return (false, errorMessages.ToString());
            }
        }

        /// <summary>
        /// 初始化所有相机（异步）
        /// </summary>
        /// <param name="cameras"></param>
        /// <returns></returns>
        public Task<(bool IsSucceed, string Message)> InitializeAllCamerasAsync(CameraInfo[] cameras)
        {

            return Task.Run(() => InitializeAllCameras(cameras));

        }

        /// <summary>
        /// 更新相机编号
        /// </summary>
        /// <param name="id"></param>
        /// <param name="newNumber"></param>
        public void UpdateCameraNumber(Guid id, int newNumber)
        {
            if (TryGetCamera(id, out var camera))
            {
                camera.Index = newNumber;
            }
        }

        private ICamera CreateCameraInstance(Guid id, CameraInfo cameraInfo)
        {
            ICamera camera;

            if (cameraInfo.CameraBrand == Enums.CameraBrand.Basler_Pylon)
            {
                camera = new BaslerCamera(id, cameraInfo.CameraNo, cameraInfo.CameraName, cameraInfo.SerialNumber, cameraInfo.CameraIp, cameraInfo.IsFindByIp);
            }
            else if (cameraInfo.CameraBrand == Enums.CameraBrand.HikRobot_MVS)
            {
                camera = new MvCamera(id, cameraInfo.CameraNo, cameraInfo.CameraName, cameraInfo.SerialNumber, cameraInfo.CameraIp, cameraInfo.IsFindByIp);
            }
            else if (cameraInfo.CameraBrand == Enums.CameraBrand.IRayple)
            {
                camera = new AHuaCamera(id, cameraInfo.CameraNo, cameraInfo.CameraName, cameraInfo.SerialNumber, cameraInfo.CameraIp, cameraInfo.IsFindByIp);
            }
            else if (cameraInfo.CameraBrand == Enums.CameraBrand.Cognex)
            {
                camera = new CognexCamera(id, cameraInfo.CameraNo, cameraInfo.CameraName, cameraInfo.SerialNumber, cameraInfo.CameraIp, cameraInfo.IsFindByIp);
            }
            else if (cameraInfo.CameraBrand == Enums.CameraBrand.Galaxy)
            {
                camera = new GalaxyCamera(id, cameraInfo.CameraNo, cameraInfo.CameraName, cameraInfo.SerialNumber, cameraInfo.CameraIp, cameraInfo.IsFindByIp);
            }
            else
            {
                camera = new MvCamera(id, cameraInfo.CameraNo, cameraInfo.CameraName, cameraInfo.SerialNumber, cameraInfo.CameraIp, cameraInfo.IsFindByIp);
            }

            return camera;
        }

        private bool TryFindCameraByNumber(int number, out Guid id, out ICamera camera)
        {
            lock (_sync)
            {
                foreach (var kvp in _CameraCollection)
                {
                    var c = kvp.Value;
                    if (c == null) continue;

                    object rawValue = null;
                    var type = c.GetType();

                    var prop = type.GetProperty("CameraNo") ?? type.GetProperty("Number") ?? type.GetProperty("No");
                    if (prop != null)
                    {
                        try
                        {
                            rawValue = prop.GetValue(c);
                        }
                        catch
                        {
                            rawValue = null;
                        }
                    }

                    if (rawValue == null)
                    {
                        var infoProp = type.GetProperty("CameraInfo") ?? type.GetProperty("Info");
                        if (infoProp != null)
                        {
                            try
                            {
                                var infoObj = infoProp.GetValue(c);
                                if (infoObj != null)
                                {
                                    var infoType = infoObj.GetType();
                                    var numberProp = infoType.GetProperty("CameraNo") ?? infoType.GetProperty("CameraNumber") ?? infoType.GetProperty("Number") ?? infoType.GetProperty("No");
                                    if (numberProp != null)
                                    {
                                        try
                                        {
                                            rawValue = numberProp.GetValue(infoObj);
                                        }
                                        catch
                                        {
                                            rawValue = null;
                                        }
                                    }
                                }
                            }
                            catch
                            {
                                rawValue = null;
                            }
                        }
                    }

                    if (rawValue != null)
                    {
                        int parsed;
                        try
                        {
                            if (rawValue is int) parsed = (int)rawValue;
                            else parsed = Convert.ToInt32(rawValue);
                        }
                        catch
                        {
                            continue;
                        }

                        if (parsed == number)
                        {
                            id = kvp.Key;
                            camera = c;
                            return true;
                        }
                    }
                }
            }

            id = Guid.Empty;
            camera = null;
            return false;
        }

        public void Dispose()
        {
            List<ICamera> cameras;
            lock (_sync)
            {
                cameras = _CameraCollection.Values.ToList();
                _CameraCollection.Clear();
            }

            foreach (var c in cameras)
            {
                try
                {
                    c.CloseDevice();
                }
                catch
                {
                    // 忽略单个相机关闭异常
                }
            }

            GC.SuppressFinalize(this);
        }
    }
}