using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using Dapper;
using Fab2ApprovalSystem.Models;
using System.Text;
using Fab2ApprovalSystem.Misc;

namespace Fab2ApprovalSystem.DMO
{
    public class TrainingDMO
    {
        private IDbConnection db = new SqlConnection(GlobalVars.DB_CONNECTION_STRING);
        private static FabApprovalTrainingEntities FabApprovalDB = new FabApprovalTrainingEntities();

        public int Create(int issueId)
        {
            var parameters = new DynamicParameters();

            parameters = new DynamicParameters();
            parameters.Add("@TrainingId", dbType: DbType.Int32, direction: ParameterDirection.InputOutput);
            parameters.Add("@ECNNumber", issueId);

            this.db.Execute("InsertTrainingItem", parameters, commandType: CommandType.StoredProcedure);
            int trainingId = parameters.Get<int>("@TrainingId");

            return trainingId;
        }
        public int CreateAssignment(int trainingId, int userId)
        {
            var parameters = new DynamicParameters();

            parameters = new DynamicParameters();
            //parameters.Add("@TrainingId", dbType: DbType.Int32, direction: ParameterDirection.InputOutput);
            parameters.Add("@TrainingID", trainingId);
            parameters.Add("@UserID", userId);
            parameters.Add("@AssignmentID", dbType: DbType.Int32, direction: ParameterDirection.InputOutput);

            this.db.Execute("InsertTrainingAssignment", parameters, commandType: CommandType.StoredProcedure);
            int assignmentId = parameters.Get<int>("@AssignmentID");

            return assignmentId;
        }
        public IEnumerable<Training> GetAllTrainings()
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            IEnumerable<Training> allTrainings = (from a in db.Trainings select a).ToList();

            return allTrainings;
        }
        public Training GetTraining(int trainingId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            Training trainingRecord = new Training();
            trainingRecord = (from a in db.Trainings where a.TrainingID == trainingId select a).FirstOrDefault();
            return trainingRecord;
        }
        public TrainingAssignment GetAssignment(int assignmentId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            TrainingAssignment assignmentRecord = (from a in db.TrainingAssignments where a.ID == assignmentId select a).FirstOrDefault();
            return assignmentRecord;
        } 
        public int GetTrainingId(int issueId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            int ECNId = issueId;
            int trainingId = (from a in db.Trainings where a.ECN == ECNId select a.TrainingID).FirstOrDefault();

            return trainingId;
        }
        public List<int> GetTrainees(int groupId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var users = (from a in db.TrainingGroupMembers where a.TrainingGroupID == groupId select a.UserID).ToList();

            return users;
        }
        public bool isUserTrainingMember(int groupId, int userId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var users = (from a in db.TrainingGroupMembers where a.TrainingGroupID == groupId && a.UserID == userId select a).FirstOrDefault();

            if (users == null)
            {
                return false;
            }
            else
            {
                return true;
            }

        }
        public List<TrainingGroup> GetTrainingGroups()
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            return (from a in db.TrainingGroups select a).ToList();
        }
        public TrainingGroup GetTrainingGroupByID(int groupId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            TrainingGroup groups = (from a in db.TrainingGroups where a.TrainingGroupID == groupId select a).FirstOrDefault();
            return groups;
        }
        public List<int> GetECNAssignedTrainingGroups(int ECNNumber)
        {
            List<int> trainingGroups = (from a in FabApprovalDB.ECNTrainingBies where a.ECNNumber == ECNNumber select a.AcknowledgementTrainingByID).ToList();

            return trainingGroups;
        }
        public void AddTrainingGroupToECN(int ECNNumber, int groupId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            //ECNTrainingBy ecnTraining = new ECNTrainingBy();
            //ecnTraining.AcknowledgementTrainingByID = groupId;
            //ecnTraining.ECNNumber = ECNNumber;

            var parameters = new DynamicParameters();
            parameters.Add("@ECNNumber", ECNNumber);
            parameters.Add("@TrainingByID", groupId);

            this.db.Execute("ECNInsertTrainingBy", parameters, commandType: CommandType.StoredProcedure);




            //db.ECNTrainingBies.Add(ecnTraining);

        }
        public void SetTrainingFlag(int ECNNumber)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            //ECNTrainingBy ecnTraining = new ECNTrainingBy();
            //ecnTraining.AcknowledgementTrainingByID = groupId;
            //ecnTraining.ECNNumber = ECNNumber;

            var parameters = new DynamicParameters();
            parameters.Add("@ECNNumber", ECNNumber);

            this.db.Execute("ECNSetTrainingFlag", parameters, commandType: CommandType.StoredProcedure);




            //db.ECNTrainingBies.Add(ecnTraining);

        }
        public List<TrainingAssignment> GetAllTrainingAssignments(int TrainingID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var TrainingData = from a in db.TrainingAssignments where a.TrainingID == TrainingID select a;

            return TrainingData.ToList();
        }
        public List<TrainingAssignment> GetTrainingAssignments(int TrainingID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var TrainingData = from a in db.TrainingAssignments where a.TrainingID == TrainingID && a.Deleted != true select a;

            return TrainingData.ToList();
        }
        public List<TrainingAssignment> GetTrainingAssignmentsByUser(int TrainingID, int userID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var TrainingData = from a in db.TrainingAssignments where a.TrainingID == TrainingID && a.UserID == userID select a;

            return TrainingData.ToList();
        }
        public List<TrainingDocAck> GetAssignedDocs(int trainingAssignmentId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var docs = (from a in db.TrainingDocAcks where a.TrainingAssignmentID == trainingAssignmentId && a.Deleted != true select a).ToList();

            return docs;
        }
        public void AcknowledgeDocument(int trainingDocAckID)
        {
            var parameters = new DynamicParameters();

            parameters = new DynamicParameters();
            parameters.Add("@TrainingDocAckID", trainingDocAckID);
            //parameters.Add("@AttachmentID", attachmentID);

            this.db.Execute("TrainingAcknowledgeDocument", parameters, commandType: CommandType.StoredProcedure);

        }
        public void UpdateAssignmentStatus(int trainingAssignmentID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var RecordToUpdate = (from a in db.TrainingAssignments where a.ID == trainingAssignmentID select a).SingleOrDefault();
            if(RecordToUpdate.status != true)
            {
                RecordToUpdate.DateCompleted = DateTime.Now;
                RecordToUpdate.status = true;
                try
                {
                    db.SaveChanges();
                }
                catch (InvalidOperationException e)
                {
                    string exception = e.ToString();
                    Console.WriteLine(e);
                }
            }

            
        }
        public int GetTrainingIdByAssignment(int trainingAssignmentID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            int trainingID = (from a in db.TrainingAssignments where a.ID == trainingAssignmentID select a.TrainingID).SingleOrDefault();

            return trainingID;
        }
        public void UpdateTrainingStatus(int trainingId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            Training training = (from a in db.Trainings where a.TrainingID == trainingId select a).SingleOrDefault();

            if (training != null)
            {
                training.CompletedDate = DateTime.Now;
                training.Status = true;

                try
                {
                    db.SaveChanges();
                }
                catch (InvalidOperationException e)
                {
                    string exception = e.ToString();
                    Console.WriteLine(e);
                }
            }
        }
        public void reOpenTraining(int trainingId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            Training training = (from a in db.Trainings where a.TrainingID == trainingId select a).SingleOrDefault();

            if (training != null)
            {
                training.CompletedDate = null;
                training.Status = false;

                try
                {
                    db.SaveChanges();
                }
                catch (InvalidOperationException e)
                {
                    string exception = e.ToString();
                    Console.WriteLine(e);
                }
            }
        }

        public bool CheckTrainingStatus(int trainingAssignmentID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            bool isFinished = true;
            int trainingID = (from a in db.TrainingAssignments where a.ID == trainingAssignmentID select a.TrainingID).SingleOrDefault();
            var trainingAssignments = from a in db.TrainingAssignments where a.TrainingID == trainingID && a.Deleted != true select a;

            foreach (var training in trainingAssignments)
            {
                if (training.status == false)
                {
                    isFinished = false;
                }
            }
            

            return isFinished;
        }

        public bool CheckTrainingAssignmentStatus(int trainingAssignmentID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            bool isFinished = true;
            //TrainingDocAck docsAssigned = null;

               var docsAssigned = from a in db.TrainingDocAcks where a.TrainingAssignmentID == trainingAssignmentID && a.Deleted != true select a;




                foreach (var doc in docsAssigned)
                {
                    if (doc.Reviewed == false)
                    {
                        isFinished = false;
                    }
                }
            
            return isFinished;
        }
        public bool IsUserAssigned(int userId, int trainingId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            bool userHasAssignment = false;

            var assignments = (from a in db.TrainingAssignments where a.TrainingID == trainingId && a.UserID == userId && a.Deleted != true select a).ToList();

            if(assignments.Count() > 0)
            {
                userHasAssignment = true;
            }

            return userHasAssignment;
        }
        public List<Training> GetTrainings()
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var trainings = from a in db.Trainings select a;

            return trainings.ToList();
        }
        public List<TrainingAssignment> GetTrainingAssignmentsByUserID(int userID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var trainingAssignments = from a in db.TrainingAssignments where a.UserID == userID && a.Deleted != true select a;

            return trainingAssignments.ToList();
        }

        public void DeleteTrainingAssignment(int trainingAssignmentId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var trainingAssignments = from a in db.TrainingAssignments where a.ID == trainingAssignmentId select a;

            foreach (var item in trainingAssignments)
            {
                item.Deleted = true;
                item.DeletedDate = DateTime.Now;
            }
            try
            {
                db.SaveChanges();
            }
            catch (InvalidOperationException e)
            {
                string exception = e.ToString();
                Console.WriteLine(e);
            }
        }
        public void DeleteTrainingDocAck(int trainingAssignmentId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            var trainingDocAcks = from a in db.TrainingDocAcks where a.TrainingAssignmentID == trainingAssignmentId select a;

            foreach (var item in trainingDocAcks)
            {
                item.Deleted = true;
                item.DeletedDate = DateTime.Now;
            }
            try
            {
                db.SaveChanges();
            }
            catch (InvalidOperationException e)
            {
                string exception = e.ToString();
                Console.WriteLine(e);
            }
        }
        public void DeleteTraining(int trainingId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            Training training = (from a in db.Trainings where a.TrainingID == trainingId select a).FirstOrDefault();

            if (training != null)
            {
                training.Deleted = true;
                training.DeletedDate = DateTime.Now;
            }

            List<TrainingAssignment> trainingAssignments = (from a in db.TrainingAssignments where a.TrainingID == trainingId select a).ToList();
            db.SaveChanges();
            foreach (TrainingAssignment trainingAssignment in trainingAssignments)
            {
                DeleteTrainingAssignment(trainingAssignment.ID);
                DeleteTrainingDocAck(trainingAssignment.ID);
                //db.SaveChanges();
            }

            
        }
        public void DeleteAssignmentByUserId(int userId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();

            var userAssignments = (from a in db.TrainingAssignments where a.UserID == userId select a).ToList();

            foreach (var item in userAssignments)
            {
                //get document assignments
                var docAssignments = (from a in db.TrainingDocAcks where a.TrainingAssignmentID == item.TrainingID select a).ToList();
                //delete each docAssignment
                foreach (var docAssignment in docAssignments)
                {
                    DeleteTrainingDocAck(docAssignment.ID);
                }
                DeleteTrainingAssignment(item.ID);
            }
        }
        public bool CheckValidDocAck(int docAckId)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            TrainingDocAck ack = (from a in db.TrainingDocAcks where a.ID == docAckId select a).FirstOrDefault();

            //TODO Check the user is valid

            //Check that the assignment exists
            if (ack != null)
            {
                //Check that the assignment isn't deleted
                if (ack.Deleted == true)
                {
                    return false;
                }
                //Check that the assignment isn't completed
                else if (ack.Reviewed == true)
                {
                    return false;
                }
                else
                {
                    return true;
                }
            }
            else
            {
                return false;
            }

        }
        public List<Training> GetAllOpenTrainings()
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            List<Training> openTrainings = (from a in db.Trainings where a.Status != true && a.Deleted != true select a).ToList();
            return openTrainings;
        }
        public List<TrainingAssignment> GetOpenAssignmentsByTrainingID(int trainingID)
        {
            FabApprovalTrainingEntities db = new FabApprovalTrainingEntities();
            List<TrainingAssignment> openAssignments = (from a in FabApprovalDB.TrainingAssignments where a.TrainingID == trainingID && a.status != true && a.Deleted != true select a).ToList();
            return openAssignments;
        }

    }
}