// Copyright (c) 2023- schick Informatik
// Description: Participant Port Map Entity

using System.Data;

namespace brecal.model
{
    public class PortAssignment : DbEntity
    {
        #region Properties

        public int? ParticipantId { get; set; }

        public int? PortId { get; set; }

        public Participant? AssignedParticipant { get; set; }

        public Port? AssignedPort { get; set; }

        #endregion

        #region public static methods

        public static async Task<List<PortAssignment>> LoadForParticipant(Participant? p, IDBManager manager)
        {
            List<DbEntity> loadResultList = await manager.Load(SetLoadQuery, LoadElems, args: p);
            List<PortAssignment> result = new();
            foreach (PortAssignment pa in loadResultList.Cast<PortAssignment>())
            {
                pa.AssignedParticipant = p;
                result.Add(pa);
            }
            return result;
        }

        public static void SetLoadQuery(IDbCommand cmd, params object?[] args)
        {
            cmd.CommandText = "SELECT id, participant_id, port_id FROM participant_port_map WHERE participant_id = @PID";
            if (args.Length != 1 || args[0] is not Participant)
                throw new ArgumentException("loader needs single participant as argument");
            IDataParameter pid = cmd.CreateParameter();
            pid.ParameterName = "PID";
            if (args[0] is Participant p)
                pid.Value = p.Id;
            cmd.Parameters.Add(pid);
        }

        public static List<DbEntity> LoadElems(IDataReader reader)
        {
            List<DbEntity> result = new();
            while (reader.Read())
            {
                PortAssignment ra = new();
                ra.Id = (uint)reader.GetInt32(0);
                if (!reader.IsDBNull(1)) ra.ParticipantId = reader.GetInt32(1);
                if (!reader.IsDBNull(2)) ra.PortId = reader.GetInt32(2);
                result.Add(ra);
            }
            return result;
        }

        #endregion

        #region overrides

        public override void SetUpdate(IDbCommand cmd)
        {
            throw new NotImplementedException();
        }

        public override void SetCreate(IDbCommand cmd)
        {
            cmd.CommandText = "INSERT INTO participant_port_map (participant_id, port_id) VALUES (@PID, @PORTID)";

            IDbDataParameter participantId = cmd.CreateParameter();
            participantId.ParameterName = "pID";
            participantId.Value = this.ParticipantId;
            cmd.Parameters.Add(participantId);

            IDbDataParameter portId = cmd.CreateParameter();
            portId.ParameterName = "PORTID";
            portId.Value = this.PortId;
            cmd.Parameters.Add(portId);
        }

        public override void SetDelete(IDbCommand cmd)
        {
            cmd.CommandText = "DELETE FROM participant_port_map WHERE id = @ID";

            IDataParameter idParam = cmd.CreateParameter();
            idParam.ParameterName = "ID";
            idParam.Value = this.Id;
            cmd.Parameters.Add(idParam);
        }

        public override string ToString()
        {
            if (this.AssignedPort == null)
            {
                return $"{Id}: <defunct port>";
            }
            else
            {
                return AssignedPort.Name ?? AssignedPort.Id.ToString();
            }
        }

        #endregion

    }
}