using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DTS.Common.Enums.Hardware;
using DTS.Common.Interface.DASFactory.Diagnostics.HardwareList;

namespace HardareList.Model
{
    public class SLICE6TreeNode : DTS.Common.Base.BasePropertyChanged, ISLICE6TreeNode
    {
        /// <summary>
        /// Id in DAS table in db
        /// </summary>
        public int DASId { get; set; }
        /// <summary>
        /// serial number for given das
        /// </summary>
        public string SerialNumber { get; set; }
        /// <summary>
        /// port on the S6DB
        /// </summary>
        public int Port { get; set; }
        /// <summary>
        /// string version of the port, this is just here for easier converting of invalid values
        /// </summary>
        public string PortString => Port < 0 ? "---" : Port.ToString();
        /// <summary>
        /// the order of the das on the S6DB
        /// </summary>
        public int Number { get; set; }
        /// <summary>
        /// the order on the chain on a given port
        /// </summary>
        public int PositionOnChain { get; set; }

        /// <summary>
        /// string version of PositionOnChain, just for easier converting of invalid values
        /// </summary>
        public string PositionOnChainString => PositionOnChain < 0 ? "---" : PositionOnChain.ToString();

        public SLICE6TreeNode(int dasId, string serialNumber, int port, int number, int positionOnChain)
        {
            DASId = dasId;
            SerialNumber = serialNumber;
            Port = port;
            Number = number;
            PositionOnChain = positionOnChain;
        }

        /// <summary>
        /// returns all S6 that are not associated with a given S6DB
        /// </summary>
        /// <param name="serialNumberParent"></param>
        /// <returns></returns>
        public static ISLICE6TreeNode[] GetAvailableTreeNodes(string serialNumberParent)
        {
            var nodes = new List<ISLICE6TreeNode>();
            if (string.IsNullOrWhiteSpace(serialNumberParent))
            {
                return nodes.ToArray();
            }
            using (var cmd = DTS.Common.Storage.DbOperations.GetSQLCommand())
            {
                try
                {
                    cmd.CommandType = System.Data.CommandType.Text;
                    cmd.CommandText = $"SELECT [DASId], [SerialNumber], [PositionOnDistributor], [PositionOnChain], [Port] FROM [DAS] WHERE [ParentDAS]<>@ParentDAS AND [Type]={(int)HardwareTypes.SLICE6_Base} AND [Position] <> 'Prototype'";
                    cmd.Parameters.Add(
                        new System.Data.SqlClient.SqlParameter("@ParentDAS", System.Data.SqlDbType.NVarChar, 50)
                        { Value = serialNumberParent });

                    var reader = cmd.ExecuteReader();
                    while (reader.Read())
                    {
                        var dasId = Convert.ToInt32(reader["DASId"]);
                        var serialNumber = Convert.ToString(reader["SerialNumber"]);
                        var positionOnDistributor = Convert.ToInt32(reader["PositionOnDistributor"]);
                        var positionOnChain = Convert.ToInt32(reader["PositionOnChain"]);
                        var port = Convert.ToInt32(reader["Port"]);
                        nodes.Add(new SLICE6TreeNode(dasId, serialNumber, port, positionOnDistributor, positionOnChain));
                    }
                }
                finally
                {
                    cmd.Connection.Dispose();
                }
            }

            nodes.Sort((a, b) => a.SerialNumber.CompareTo(b.SerialNumber));
            return nodes.ToArray();
        }
        /// <summary>
        /// returns all SL6 associated with a given S6DB
        /// </summary>
        /// <param name="serialNumberParent"></param>
        /// <returns></returns>
        public static ISLICE6TreeNode[] GetTreeNodes(string serialNumberParent)
        {
            var nodes = new List<ISLICE6TreeNode>();
            if (!string.IsNullOrWhiteSpace(serialNumberParent))
            {
                using (var cmd = DTS.Common.Storage.DbOperations.GetSQLCommand())
                {
                    try
                    {
                        cmd.CommandType = System.Data.CommandType.Text;
                        cmd.CommandText = "SELECT [DASId], [SerialNumber], [PositionOnDistributor], [PositionOnChain], [Port] FROM [DAS] WHERE [ParentDAS]=@ParentDAS";
                        cmd.Parameters.Add(
                            new System.Data.SqlClient.SqlParameter("@ParentDAS", System.Data.SqlDbType.NVarChar, 50)
                            { Value = serialNumberParent });

                        var reader = cmd.ExecuteReader();
                        while (reader.Read())
                        {
                            var dasId = Convert.ToInt32(reader["DASId"]);
                            var serialNumber = Convert.ToString(reader["SerialNumber"]);
                            var positionOnDistributor = Convert.ToInt32(reader["PositionOnDistributor"]);
                            var positionOnChain = Convert.ToInt32(reader["PositionOnChain"]);
                            var port = Convert.ToInt32(reader["Port"]);
                            nodes.Add(new SLICE6TreeNode(dasId, serialNumber, port, positionOnDistributor,
                                positionOnChain));
                        }
                    }
                    finally
                    {
                        cmd.Connection.Dispose();
                    }
                }

                nodes.Sort((a, b) => a.Number.CompareTo(b.Number));
            }

            return nodes.ToArray();
        }

        /// <summary>
        /// swaps the children das from one distributor to another in the db
        /// </summary>
        public static void SwapNodes(string serialNumberA, string serialNumberB)
        {
            var listA = new List<int>();
            var listB = new List<int>();
            using (var sql = DTS.Common.Storage.DbOperations.GetSQLCommand(true))
            {
                try
                {
                    sql.CommandType = System.Data.CommandType.Text;
                    sql.CommandText = $"SELECT [DASId], [ParentDAS] FROM [DAS] WHERE [ParentDAS] in (@serialNumberA, @serialNumberB)";
                    sql.Parameters.Add(new System.Data.SqlClient.SqlParameter("@serialNumberA", System.Data.SqlDbType.NVarChar)
                    { Value = serialNumberA });
                    sql.Parameters.Add(new System.Data.SqlClient.SqlParameter("@serialNumberB", System.Data.SqlDbType.NVarChar)
                    { Value = serialNumberB });
                    var reader = sql.ExecuteReader();
                    while (reader.Read())
                    {
                        var dasId = Convert.ToInt32(reader["DASId"]);
                        var parentDAS = Convert.ToString(reader["ParentDAS"]).ToUpper();
                        if (parentDAS == serialNumberA)
                        {
                            listA.Add(dasId);
                        }
                        else
                        {
                            listB.Add(dasId);
                        }
                    }
                }
                finally
                {
                    sql.Connection.Dispose();
                }
            }

            if (listA.Any())
            {
                Associate(serialNumberB, listA.ToArray());
            }

            if (listB.Any())
            {
                Associate(serialNumberB, listB.ToArray());
            }
        }
        /// <summary>
        /// associates given das ids with a specific das
        /// </summary>
        private static void Associate(string parentDAS, int[] dasId)
        {
            using (var sql = DTS.Common.Storage.DbOperations.GetSQLCommand(true))
            {
                try
                {
                    sql.CommandType = System.Data.CommandType.Text;
                    sql.Parameters.Add(new System.Data.SqlClient.SqlParameter("@ParentDAS", System.Data.SqlDbType.NVarChar)
                    { Value = parentDAS });

                    var sb = new StringBuilder();
                    sb.Append("UPDATE [DAS] SET [ParentDAS]=@ParentDAS WHERE DASId in (");

                    for (var i = 0; i < dasId.Length; i++)
                    {
                        if (i > 0)
                        {
                            sb.Append(", ");
                        }
                        sb.Append($"@{i + 1}");
                        sql.Parameters.Add(
                            new System.Data.SqlClient.SqlParameter($"@{i + 1}", System.Data.SqlDbType.NVarChar, 50)
                            { Value = dasId[i] });
                    }
                    sb.Append(")");
                    sql.CommandText = sb.ToString();

                    sql.ExecuteNonQuery();
                }
                finally
                {
                    sql.Connection.Dispose();
                }
            }
        }
        /// <summary>
        /// commits any changes for associations for a S6DB to the Db
        /// </summary>
        /// <param name="serialNumber">serial number of S6DB</param>
        /// <param name="attachedSLICE6">all SL6 that should be associated with S6DB</param>
        public static void SaveAssociations(string serialNumber, ISLICE6TreeNode[] attachedSLICE6)
        {
            //step1, remove all associations, step 2, add any associations needed
            using (var sql = DTS.Common.Storage.DbOperations.GetSQLCommand())
            {
                try
                {
                    sql.CommandType = System.Data.CommandType.Text;
                    sql.CommandText =
                        "UPDATE [DAS] SET [IsModule]=0, [PositionOnDistributor]=-1, [PositionOnChain]=-1, [Port]=-1, [ParentDAS]='' WHERE [ParentDAS]=@serialNumber";
                    sql.Parameters.Add(
                        new System.Data.SqlClient.SqlParameter("@serialNumber", System.Data.SqlDbType.NVarChar, 50)
                        { Value = serialNumber });
                    sql.ExecuteNonQuery();
                }
                finally
                {
                    sql.Connection.Dispose();
                }
            }
            //step 2 create new associations
            foreach (var slice6 in attachedSLICE6)
            {
                using (var sql = DTS.Common.Storage.DbOperations.GetSQLCommand())
                {
                    try
                    {
                        sql.CommandType = System.Data.CommandType.Text;
                        sql.CommandText =
                            "UPDATE [DAS] SET [IsModule]=1, [PositionOnDistributor]=@positionOnDistributor, [PositionOnChain]=@positionOnChain, [Port]=@Port, [ParentDAS]=@serialNumber WHERE [DASId]=@DASId";
                        sql.Parameters.Add(
                            new System.Data.SqlClient.SqlParameter("@serialNumber", System.Data.SqlDbType.NVarChar, 50)
                            { Value = serialNumber });
                        sql.Parameters.Add(
                            new System.Data.SqlClient.SqlParameter("@positionOnDistributor", System.Data.SqlDbType.Int)
                            { Value = slice6.Number });
                        sql.Parameters.Add(
                            new System.Data.SqlClient.SqlParameter("@positionOnChain", System.Data.SqlDbType.Int)
                            { Value = slice6.PositionOnChain });
                        sql.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Port", System.Data.SqlDbType.Int)
                        { Value = slice6.Port });
                        sql.Parameters.Add(new System.Data.SqlClient.SqlParameter("@DASId", System.Data.SqlDbType.Int)
                        { Value = slice6.DASId });
                        sql.ExecuteNonQuery();
                    }
                    finally
                    {
                        sql.Connection.Dispose();
                    }
                }
            }
        }

    }
}