using Cis.Application.Cb;
using Cis.Application.Cm;
using Cis.Application.Core.Component.PtzServer;
using EC.Helper.CameraSDK;
using EC.Helper.RabbitFunc;
using EC.Helper.RabbitFunc.Expressions;
using FreeRedis;
using System.Collections.Concurrent;

namespace Cis.Application.Core.Component.MarkSeacher;

/// <summary>
/// 追踪标签服务类
/// </summary>
public class MarkSearcherServer : IMarkSearcherServer, ISingleton
{
    #region Attr

    private readonly SqlSugarRepository<CbCamera> _cbCameraRep;
    private readonly SqlSugarRepository<CbCameraParams> _cbCameraParamsRep;
    private readonly SqlSugarRepository<CmMarkLabel> _cmMarkLableRep;
    private readonly RedisClient _cache;

    private readonly ICameraSdkServer _cameraSdkServer;

    /// <summary>
    /// {cbCameraId, MarkSearcherBase}
    /// </summary>
    private ConcurrentDictionary<long, MarkSearcherBase> MarkSearcherDict { get; set; } = new();

    /// <summary>
    /// MarkSearcherDict 原子操作锁
    /// </summary>
    private ReaderWriterLockSlim MsDictRWLock { get; } = new();

    /// <summary>
    /// MarkSearcherDict 中 MarkLabel 原子操作锁
    /// </summary>
    private ReaderWriterLockSlim MsMlRWLock { get; } = new();

    #endregion Attr

    public MarkSearcherServer(
        RedisClient cache,
        ICameraSdkServer cameraSdkServer
    )
    {
        _cbCameraRep = App.GetService<SqlSugarRepository<CbCamera>>();
        _cbCameraParamsRep = App.GetService<SqlSugarRepository<CbCameraParams>>();
        _cmMarkLableRep = App.GetService<SqlSugarRepository<CmMarkLabel>>();
        _cache = cache;
        _cameraSdkServer = cameraSdkServer;
    }

    #region Base Method

    public bool ActivateSearcher(long cameraId)
    {
        try
        {
            MsDictRWLock.TryEnterWriteLock(2000);
            return ActivateSearcherAtom(cameraId);
        }
        finally
        {
            MsDictRWLock.ExitWriteLock();
        }
    }

    /// <summary>
    /// ActivateSearcher 原子操作
    /// </summary>
    /// <param name="cameraId"></param>
    /// <returns></returns>
    private bool ActivateSearcherAtom(long cameraId)
    {
        bool ret = MarkSearcherDict.ContainsKey(cameraId);
        if (ret) return false;
        // 获取相机
        CbCamera cbCamera = _cbCameraRep.GetById(cameraId);
        if (cbCamera == null) return false;
        // 获取相机参数
        CbCameraParams cbCameraParams = _cbCameraParamsRep.GetById(cbCamera.CbCameraParamsId);
        if (cbCameraParams == null) return false;

        // 注册并获取 ptz
        ret = _cameraSdkServer.IsExists(cbCamera.Ip);
        if (!ret)
        {
            CameraInfo cameraInfo = CameraInfo.New(cbCameraParams.CameraType, cbCamera.Ip, cbCamera.UserName, cbCamera.Password);
            ret = _cameraSdkServer.Register(cameraInfo);
            if (!ret)
            {
                // double check
                ret = _cameraSdkServer.IsExists(cbCamera.Ip);
                if (!ret) return false;
            }
        }
        ret = _cameraSdkServer.TryGetPtzInfoByIp(cbCamera.Ip, out PtzInfo ptzInfo);
        if (!ret) return false;

        // 解析 ZoomVaryFunc
        LambdaExpression zoomVaryExpr = RabbitFuncUtil.CompileFromSource(cbCameraParams.ZoomVaryFunc);

        // 创建相机计算参数
        CameraCalcParams cameraCalcParams = CameraCalcParams.New(cbCamera.Id, ptzInfo, cbCameraParams.FocusX, cbCameraParams.FocusY, zoomVaryExpr);
        // 创建 markSearcher
        MarkSearcherBase markSearcher = ((CameraType)cbCameraParams.CameraType).CreateMarkSearcher(cameraCalcParams);
        if (markSearcher == null) return false;
        // 获取标签列表
        List<CmMarkLabel> cmMarkLabelList = _cmMarkLableRep.GetList(u => u.CbCameraId == cameraId);
        // 将标签添加到 markSearcher
        foreach (CmMarkLabel item in cmMarkLabelList)
        {
            // 创建标签计算参数
            MarkLabelCalcParams labelCalcParams = MarkLabelCalcParams.New(
                item.Id,
                PtzInfo.New(item.PanPosition, item.TiltPosition, item.ZoomPosition),
                item.VideoWidth,
                item.VideoHeight,
                item.CanvasLeftRatio,
                item.CanvasTopRatio
            );
            markSearcher.AddMarkLabelCalcParams(labelCalcParams);
        }
        // 存放 markSearcher
        ret = MarkSearcherDict.TryAdd(cameraId, markSearcher);
        if (!ret) return false;
        // 记录缓存
        _cache.HSet(CacheInfo.CameraId2Ip, cbCamera.Id.ToString(), cbCamera.Ip);
        _cache.HIncrBy(CacheInfo.CameraIpCounts, cbCamera.Ip, 1);
        return true;
    }

    public bool DeactivateSearcher(long cameraId)
    {
        try
        {
            MsDictRWLock.TryEnterWriteLock(2000);
            return DeactivateSearcherAtom(cameraId);
        }
        finally
        {
            MsDictRWLock.ExitWriteLock();
        }
    }

    /// <summary>
    /// DeactivateSearcher 原子操作
    /// </summary>
    /// <param name="cameraId"></param>
    /// <returns></returns>
    private bool DeactivateSearcherAtom(long cameraId)
    {
        bool ret = MarkSearcherDict.TryRemove(cameraId, out _);
        if (!ret) return false;
        string cameraIp = _cache.HGet(CacheInfo.CameraId2Ip, cameraId.ToString());
        if (string.IsNullOrEmpty(cameraIp)) return false;
        _cache.HDel(CacheInfo.CameraId2Ip, cameraId.ToString());
        _cache.HIncrBy(CacheInfo.CameraIpCounts, cameraIp, -1);
        //int ipCount = (int)_cache.HashGet(CacheInfo.CameraIpCounts, cameraIp);
        //if (ipCount <= 0)
        //{
        //    // 直接删除 or 设置过期
        //    _cache.HashDelete(CacheInfo.CameraIpCounts, cameraIp);
        //    _cameraSdkServer.DeleteCamera(cameraIp);
        //}
        return true;
    }

    public bool IsExistsSearcher(long cameraId)
    {
        return MarkSearcherDict.ContainsKey(cameraId);
    }

    public MarkSearcherBase GetSearcher(long cameraId)
    {
        MarkSearcherDict.TryGetValue(cameraId, out MarkSearcherBase searcher);
        return searcher;
    }

    public bool ActivateMarkLabel(long cameraId, long markLabelId)
    {
        try
        {
            MsMlRWLock.TryEnterWriteLock(2000);
            return ActivateMarkLabelAtom(cameraId, markLabelId);
        }
        finally
        {
            MsMlRWLock.ExitWriteLock();
        }
    }

    /// <summary>
    /// ActivateMarkLabel 原子操作
    /// </summary>
    /// <param name="cameraId"></param>
    /// <param name="markLabelId"></param>
    /// <returns></returns>
    private bool ActivateMarkLabelAtom(long cameraId, long markLabelId)
    {
        bool ret = MarkSearcherDict.TryGetValue(cameraId, out MarkSearcherBase markSearcher);
        if (!ret) return false;
        ret = markSearcher.IsExistsMarkLabelCalcParams(markLabelId);
        if (ret) return false;
        CmMarkLabel label = _cmMarkLableRep.GetById(markLabelId);
        if (label == null) return false;
        MarkLabelCalcParams labelCalcParams = MarkLabelCalcParams.New(
            label.Id,
            PtzInfo.New(label.PanPosition, label.TiltPosition, label.ZoomPosition),
            label.VideoWidth,
            label.VideoHeight,
            label.CanvasLeftRatio,
            label.CanvasTopRatio
        );
        ret = markSearcher.AddMarkLabelCalcParams(labelCalcParams);
        return ret;
    }

    public bool DeactivateMarkLabel(long cameraId, long markLabelId)
    {
        try
        {
            MsMlRWLock.TryEnterWriteLock(2000);
            return DeactivateMarkLabelAtom(cameraId, markLabelId);
        }
        finally
        {
            MsMlRWLock.ExitWriteLock();
        }
    }

    /// <summary>
    /// DeactivateMarkLabel 原子操作
    /// </summary>
    /// <param name="cameraId"></param>
    /// <param name="markLabelId"></param>
    /// <returns></returns>
    private bool DeactivateMarkLabelAtom(long cameraId, long markLabelId)
    {
        bool ret = MarkSearcherDict.TryGetValue(cameraId, out MarkSearcherBase markSearcher);
        if (!ret) return false;
        ret = markSearcher.DeleteMarkLabelCalcParams(markLabelId);
        return ret;
    }

    public bool IsExistsMarkLabel(long cameraId, long markLabelId)
    {
        return MarkSearcherDict.TryGetValue(cameraId, out MarkSearcherBase searcher)
            && searcher.IsExistsMarkLabelCalcParams(markLabelId);
    }

    public List<MarkLabelCalcResult> GetMarkLabelCalcResultList(long cameraId)
    {
        bool ret = MarkSearcherDict.TryGetValue(cameraId, out MarkSearcherBase markSearcher);
        return ret ? markSearcher.GetMarkLabelCalcResultList() : new List<MarkLabelCalcResult>();
    }

    #endregion Base Method

    #region Base Method Async

    public async Task<bool> ActivateSearcherAsync(long cameraId)
    {
        return await Task.Run(() => ActivateSearcher(cameraId));
    }

    public async Task<bool> DeactivateSearcherAsync(long cameraId)
    {
        return await Task.Run(() => DeactivateSearcher(cameraId));
    }

    public async Task<bool> IsExistsSearcherAsync(long cameraId)
    {
        return await Task.Run(() => IsExistsSearcher(cameraId));
    }

    public async Task<MarkSearcherBase> GetSearcherAsync(long cameraId)
    {
        return await Task.Run(() => GetSearcher(cameraId));
    }

    public async Task<bool> ActivateMarkLabelAsync(long cameraId, long markLabelId)
    {
        return await Task.Run(() => ActivateMarkLabel(cameraId, markLabelId));
    }

    public async Task<bool> DeactivateMarkLabelAsync(long cameraId, long markLabelId)
    {
        return await Task.Run(() => DeactivateMarkLabel(cameraId, markLabelId));
    }

    public async Task<bool> IsExistsMarkLabelAsync(long cameraId, long markLabelId)
    {
        return await Task.Run(() => IsExistsMarkLabel(cameraId, markLabelId));
    }

    public async Task<List<MarkLabelCalcResult>> GetMarkLabelCalcResultListAsync(long cameraId)
    {
        return await Task.Run(() => GetMarkLabelCalcResultList(cameraId));
    }

    #endregion Base Method Async
}