using Step.Model.DatabaseModels;
using Step.Model.DTOModels.ToolModels;
using Step.Utils;
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using static Step.Utils.SupportFunctions;
using static Step.Model.Constants;

namespace Step.Database.Controllers
{
    public class NcToolManagerController : IDisposable
    {
        public DatabaseContext dbCtx;

        public NcToolManagerController()
        {
            // Initialize database context
            dbCtx = new DatabaseContext();
        }

        public void Dispose()
        {
            // Clear database context
            dbCtx.Dispose();
        }

        public List<DbNcFamilyModel> FindFamilies()
        {
            List<DbNcFamilyModel> families = dbCtx
                .Families
                .Include("Tools")
                .ToList();

            return families;
        }

        public List<DTONcFamilyModel> GetFamilies()
        {
            List<DbNcFamilyModel> dbFamilies = FindFamilies();

            return dbFamilies
                .Select(x => (DTONcFamilyModel)x)
                .ToList();
        }

        public List<DbNcFamilyModel> FindFamiliesByShankId(int shankId)
        {
            DbNcShankModel shank = FindShankWithTools(shankId);
            // Get only families id
            short[] ids = shank.Tools.Select(x => x.FamilyId).ToArray();

            return FindFamilies() // Get Families
                .Where(x => ids.Contains(x.FamilyId)) // Filter by ids
                .ToList();
        }

        public DbNcToolModel FindTool(int toolId)
        {
            return dbCtx.Tools
                .Where(x => x.ToolId == toolId)
                .FirstOrDefault();
        }

        public DbNcToolModel FindToolWithDependencies(int toolId)
        {
            return dbCtx.Tools
                .Where(x => x.ToolId == toolId)
                .Include("Family")
                .Include("Shank")
                .FirstOrDefault();
        } 

        public DbNcShankModel FindShankWithTools(int shankId) 
        {
            return dbCtx.Shanks
                .Include("Tools")
                .Where(x => x.ShankId == shankId)
                .FirstOrDefault();
        }

        public DbNcFamilyModel FindFamily(int familyId)
        {
            return dbCtx
                .Families
                .Where(x => x.FamilyId == familyId)
                .Include("Tools")
                .FirstOrDefault();
        }

        public List<DbNcToolModel> FindToolsWithDependencies()
        {
            List<DbNcToolModel> tools = dbCtx
                .Tools
                .Include("Family")
                .Include("Shank")
                .ToList();

            return tools;
        }

        public List<DbNcToolModel> FindToolsByShankIdWithDependencies(int shankId)
        {
            List<DbNcToolModel> tools = FindToolsWithDependencies()
                .Where(x => x.ShankId == shankId)
                .ToList();

            return tools;
        }

        public List<DbNcToolModel> FindTools()
        {
            List<DbNcToolModel> tools = dbCtx
                .Tools
                .ToList();

            return tools;
        }

        public List<DTONcToolModel> GetTools()
        {
            List<DbNcToolModel> dbTools = FindToolsWithDependencies();

            return dbTools
                .Select(x => (DTONcToolModel)x)
                .ToList();
        }

        public List<DbNcShankModel> FindShanks()
        {
            List<DbNcShankModel> shanks = dbCtx
                .Shanks
                .Include("MagazinePosition")
                .ToList();

            return shanks;
        }

        public DbNcShankModel FindShank(int shankId)
        {
            return dbCtx.Shanks
                .Where(x => x.ShankId == shankId)
                .FirstOrDefault();
        }

        public DbNcShankModel FindShanksByPositions(int magazineId, int positionId)
        {
            DbNcShankModel shank = FindShanks()
                    .Where(x => x.MagazineId == magazineId && x.PositionId == positionId)
                    .FirstOrDefault();

            return shank;
        }

        public List<DbNcShankModel> FindShanksByFamilyId(int familyId)
        {
            return dbCtx
                .Tools
                .Include("Shank")
                .Where(x => x.FamilyId == familyId && x.ShankId != null)
                .Select(x => x.Shank)
                .ToList();
        }

        public DbNcShankModel FindShankByToolId(int toolId)
        {
            return dbCtx
                .Tools
                .Include("Shank")
                .Where(x => x.ToolId == toolId && x.ShankId != null)
                .Select(x => x.Shank)
                .FirstOrDefault();
        }

        public List<DTONcShankModel> GetShanks()
        {
            // Get shank from database
            List<DbNcShankModel> dbShanks = dbCtx
                .Shanks
                .Include("Tools")
                .ToList();
            
            // Populate dto shanks
            List<DTONcShankModel> dtoShanks = dbShanks
                .Select(x => (DTONcShankModel)x)
                .ToList();

            return dtoShanks;
        }

        public List<DTONcShankModel> GetShanksWithSpace()
        {
            // Populate nks
            List<DTONcShankModel> dtoShanks = GetShanks();

            List<DTONcFamilyModel> dtoFamilies = GetFamilies();

            // Calculate & set space occupied for each shank
            foreach(var shank in dtoShanks)
            {
                // Get only families id
                short[] ids = shank.ChildsTools.Select(x => x.FamilyId).ToArray();

                // Get Families data
                List<DTONcFamilyModel> families = dtoFamilies
                    .Where(x => ids.Contains(x.Id))
                    .ToList();

                if (families.Count() > 0)
                {
                    // Find max between families
                    shank.MaxRight = families.Max(x => x.RightSize);
                    shank.MaxLeft = families.Max(x => x.LeftSize);
                }
            }

            return dtoShanks;
        }

        public DTONcShankModel GetShank(int shankId)
        {
            // Get shank from database
            DTONcShankModel dtoShanks = GetShanksWithSpace()
                .Where(x => x.Id == shankId)
                .FirstOrDefault();

            return dtoShanks;
        }

        public List<DbNcMagazinePositionModel> FindMagazinesPositions()
        {
            List<DbNcMagazinePositionModel> positions = dbCtx
                .MagazinePositions
                .ToList();

            return positions;
        }

        public List<DbNcMagazinePositionModel> FindMagazinePositions(byte magId)
        {
            return dbCtx
                .MagazinePositions
                .Where(x => x.MagazineId == magId)
                .ToList();
        }
        
        public void GetShankMaxSpaceOccupied(int shankId, out int maxRight, out int maxLeft)
        {
            // Get families
            List<DbNcFamilyModel> families = FindFamiliesByShankId(shankId);
            // Find max
            maxRight = families.Max(x => x.RightSize);
            maxLeft = families.Max(x => x.LeftSize);
        }

        public List<DTONcMagazinePositionModel> GetMagazinePositions(byte magId)
        {
            // Get only magazine positions that match with magazineId
            List<DTONcMagazinePositionModel> magPos = FindMagazinePositions(magId).Select(x => (DTONcMagazinePositionModel)x).ToList();
            // Get&filter shanks by magazineId in order to get only mounted shanks in the current magazineId
            List<DbNcShankModel> shanks = dbCtx.Shanks.Where(x => x.MagazineId == magId || x.OriginMagazineId == magId).ToList();
            
            foreach(DbNcShankModel shank in shanks)
            {
                DTONcMagazinePositionModel pos = null;

                // Populate magazinePosition shank Id, check actual position and origin position
               if(shank.MagazineId == magId)
                    pos = magPos // Actual case
                          .FirstOrDefault(x => x.PositionId == shank.PositionId);
               else
                    pos = magPos // Origin case
                         .FirstOrDefault(x => x.PositionId == shank.OriginPositionId);

                if (pos != null)
                    pos.ShankId = shank.ShankId;
            }
            // Convert in DTOModel and return
            return magPos;
        }

        public DbNcMagazinePositionModel FindMagazinePosition(byte magId, ushort posId)
        {
            DbNcMagazinePositionModel positions = dbCtx
                .MagazinePositions
                .FirstOrDefault(x => x.MagazineId == magId && x.PositionId == posId);

            return positions;
        }

        public List<DTONcShankModel> GetMountedShanks(int magazineId)
        {
            List<DTONcShankModel> dtoShanks = GetShanksWithSpace()
                 .Where(x => 
                            (x.MagazineId != null && x.MagazineId == magazineId) ||
                            (x.OriginMagazineId != null && x.OriginMagazineId == magazineId))
                 .ToList();

            return dtoShanks;
        }

        public List<DbNcToolModel> GetMountedTools() 
        {
            List<DbNcToolModel> tools = FindToolsWithDependencies()
                .Where(x => x.Shank != null && x.Shank.MagazineId != null)
                .ToList();

            return tools;
        }
        
        public List<DTONcShankModel> GetAvailableShanksWithChilds()
        {
            List<DTONcShankModel> dtoShanks = GetShanksWithSpace()
                .Where(x => x.MagazineId == null && x.ChildsTools.Count > 0)
                .ToList();

            return dtoShanks;
        }

        public List<DTONcToolModel> GetAvailableTools()
        {
            List<DTONcToolModel> dtoTools = GetTools()
                .Where(x => x.ShankId == null || x.ShankId == 0)
                .ToList();

            return dtoTools; 
        } 

        public DbNcToolModel AddTool(DTONewNcToolModel dtoTool, short toolId)
        {
            // Copy data
            DbNcToolModel dbTool = (DbNcToolModel)dtoTool;

            if (toolId == 0)
                // Get next id
                dbTool.ToolId = GetFirstFreeId(dbCtx.Tools.Select(x => x.ToolId).ToList());
            else
                dbTool.ToolId = toolId;

            dbCtx.Tools.Add(dbTool);
             
            dbCtx.SaveChanges();
            // Get foreign key data
            dbCtx.Entry(dbTool).Reference(x => x.Family).Load();
            dbCtx.Entry(dbTool).Reference(x => x.Shank).Load();
            
            return dbTool;
        }

        public DbNcToolModel UpdateTool(int toolId, DTONewNcToolModel dtoTool)
        {
            DbNcToolModel tool = FindTool(toolId);

            tool.Status = ((DbNcToolModel)dtoTool).Status;
            var shankId = tool.ShankId;

            // Update db model
            SupportFunctions.CopyProperties(dtoTool, tool);
            tool.ShankId = shankId;

            // Save
            dbCtx.SaveChanges();

            return tool;
        }

        public DbNcToolModel UpdateToolOffset(int toolId, int position, short offsetId)
        {
            DbNcToolModel tool = FindTool(toolId);

            switch (position)
            {
                case 1:
                        tool.OffsetId1 = offsetId;
                    break;
                case 2:
                        tool.OffsetId2 = offsetId;
                    break;
                case 3:
                        tool.OffsetId3 = offsetId;
                    break;
            }

            // Save
            dbCtx.SaveChanges();

            return tool;
        }

        public void DeleteTool(int toolId)
        {
            DbNcToolModel tool = FindTool(toolId);
            if(tool != null)
                DeleteTool(tool);
        }

        public void DeleteTool(DbNcToolModel tool)
        {
            dbCtx.Tools.Remove(tool);

            dbCtx.SaveChanges();
        }

        public DbNcFamilyModel AddFamily(DTONcFamilyModel family)
        {
            DbNcFamilyModel dbFamily = (DbNcFamilyModel)family;

            // Get next free id if id is 0
            if (dbFamily.FamilyId == 0)
                dbFamily.FamilyId = GetFirstFreeId(dbCtx.Families.Select(x => x.FamilyId).ToList());

            dbFamily.Name = DEFAULT_FAM_NAME + dbFamily.FamilyId;
            dbCtx.Families.Add(dbFamily);

            dbCtx.SaveChanges();
            
            return dbFamily;
        }

        public DbNcFamilyModel UpdateFamily(int familyId, DTONewNcFamilyModel family)
        {
            DbNcFamilyModel dbFamily = FindFamily(familyId);
            // Copy data from NewModel to DbModel
            SupportFunctions.CopyProperties(family, dbFamily);
            // Set cooling byte
            dbFamily.CoolingByte = ((DbNcFamilyModel)family).CoolingByte;

            dbCtx.SaveChanges();
            // Connect tools data
            dbCtx.Entry(dbFamily).Collection(x => x.Tools).Load();

            return dbFamily;
        }
        
        public void DeleteFamily(int famId)
        {
            var family = FindFamily(famId);

            dbCtx.Families.Remove(family);

            dbCtx.SaveChanges();
        }
        
        public DbNcShankModel AddShank(DTONewNcShankModel shank, short shankId = 0)
        {
            DbNcShankModel dbShank = (DbNcShankModel)shank;

            if (shankId == 0)
                // Get next id
                dbShank.ShankId = GetFirstFreeId(dbCtx.Shanks.Select(x => x.ShankId).ToList());
            else
                dbShank.ShankId = shankId;

            dbCtx.Shanks.Add(dbShank);

            dbCtx.SaveChanges();
           

            return dbShank;
        }

        public DbNcShankModel UpdateShank(int shankId, DTONewNcShankModel dtoShank)
        {
            DbNcShankModel ncShank = FindShankWithTools(shankId);

            return UpdateShank(ncShank, dtoShank);
        }

        public DbNcShankModel UpdateShank(DbNcShankModel dbShank, DTONewNcShankModel dtoShank)
        {
            dbShank.Balluf = dtoShank.Balluf;
            dbShank.MagazinePositionType = dtoShank.MagazinePositionType;

            dbCtx.SaveChanges();

            dbCtx.Entry(dbShank).Collection(x => x.Tools).Load();

            return dbShank;
        }
        
        public DbNcShankModel DeleteNcShank(int shankId)
        {
            DbNcShankModel shank = FindShankWithTools(shankId);
            DeleteNcShank(shank);

            return shank;
        }
        
        public void DeleteNcShank(DbNcShankModel shank)
        {
            dbCtx.Shanks.Remove(shank);

            dbCtx.SaveChanges();
        }

        public DbNcMagazinePositionModel UpdatePosition(DbNcMagazinePositionModel dbPos, DTONcMagazinePositionModel dtoPos)
        {
            dbCtx.MagazinePositions.Attach(dbPos);
            dbPos.Type = dtoPos.Type;
            dbPos.Disabled = dtoPos.Disabled;

            dbCtx.SaveChanges();

            return dbPos;
        }

        public DbNcMagazinePositionModel LoadShankInMagazine(byte magazineId, ushort positionId, DbNcShankModel shank)
        {
            dbCtx.Shanks.Attach(shank);
            // Set ids with new positions
            shank.MagazineId = magazineId;
            shank.PositionId = positionId;
            
            // Set original Ids
            shank.OriginMagazineId = magazineId;
            shank.OriginPositionId = positionId;
            
            dbCtx.SaveChanges();

            return FindMagazinePosition(magazineId, positionId);
        }

        public DbNcMagazinePositionModel LoadShankInMagazineWithoutOrigin(byte magazineId, ushort positionId, DbNcShankModel shank)
        {
            dbCtx.Shanks.Attach(shank);
            // Set ids with new positions
            shank.MagazineId = magazineId; 
            shank.PositionId = positionId; 

            dbCtx.SaveChanges();

            return FindMagazinePosition(magazineId, positionId);
        }

        public DbNcMagazinePositionModel UnloadShankInMagazine(byte magazineId, ushort positionId, DbNcShankModel shank)
        {
            dbCtx.Shanks.Attach(shank);
            // set id to null
            shank.MagazineId = null;
            shank.PositionId = null;
            
            shank.OriginMagazineId = null;
            shank.OriginPositionId = null;

            dbCtx.SaveChanges();

            return FindMagazinePosition(magazineId, positionId);
        }

        public DTONcShankModel LoadToolIntoShank(DbNcToolModel tool, short shankId)
        {
            dbCtx.Tools.Attach(tool);
            // Set tool shankId
            tool.ShankId = shankId;

            dbCtx.SaveChanges();

            return GetShank(shankId);
        }

        public DTONcShankModel UnloadToolFromShank(DbNcToolModel tool) 
        {
            dbCtx.Tools.Attach(tool);
            int? shankId = tool.ShankId;
            // Set to null shankId
            tool.ShankId = null;

            dbCtx.SaveChanges();

            return GetShank(shankId.Value);
        }

        public void SetupMagazinePositions(List<DbNcMagazinePositionModel> config)
        {
            dbCtx.MagazinePositions.AddRange(config);
            dbCtx.SaveChanges();
        }

        public void UpdateToolsData(List<DbNcToolModel> tools)
        {
            foreach (var tool in tools)
            {
                DbNcToolModel tmpTool = dbCtx.Tools.Where(x => x.ToolId == tool.ToolId).FirstOrDefault();
                tmpTool = tool;
            }

            dbCtx.SaveChanges();
        }

        public DTOExportToolTableModel GetExportData()
        {
            return new DTOExportToolTableModel
            {
                Tools = FindTools(),
                Families = FindFamilies(),
                Shanks = FindShanks()
                .Select(x => {
                    // Reset positional Data
                    x.MagazineId = null;
                    x.PositionId = null;
                    x.OriginMagazineId = null;
                    x.OriginPositionId = null;

                    return x; })
                .ToList()
            };
        }

        public List<DTOImportStatusModel> ImportData(DTOExportToolTableModel data)
        {
            List<DTOImportStatusModel> importStatus = new List<DTOImportStatusModel>();

            List<DbNcToolModel> tools = FindTools();
            List<DbNcFamilyModel> families = FindFamilies();
            List<DbNcShankModel> shanks = FindShanks();

            var positions = FindMagazinesPositions();
            if (positions.Count() == 0)
                return new List<DTOImportStatusModel>();

            if(data.Families != null)
                // loop thought new families
                foreach (var family in data.Families)
                {
                    // Check if not exist
                    if (families.FirstOrDefault(x => x.FamilyId == family.FamilyId) == null)
                    {
                        dbCtx.Families.Add(family);
                        // Set status
                        importStatus.Add(new DTOImportStatusModel()
                        {
                            Id = family.FamilyId,
                            Status = IMPORT_STATUS.OK.ToString(),
                            Type = "FAMILY"
                        });
                    }
                    else
                    {
                        // Set duplicated status
                        importStatus.Add(new DTOImportStatusModel()
                        {
                            Id = family.FamilyId,
                            Status = IMPORT_STATUS.EXIST.ToString(),
                            Type = "FAMILY"
                        });
                    }
                }

            if(data.Shanks != null)
                // loop thought new shanks
                foreach (var shank in data.Shanks)
                {
                    // Check if not exist
                    if (shanks.FirstOrDefault(x => x.ShankId == shank.ShankId) == null)
                    {
                        dbCtx.Shanks.Add(shank);
                        importStatus.Add(new DTOImportStatusModel()
                        {
                            Id = shank.ShankId,
                            Status = IMPORT_STATUS.OK.ToString(),
                            Type = "SHANK"
                        });
                    }
                    else
                    {
                        importStatus.Add(new DTOImportStatusModel()
                        {
                            Id = shank.ShankId,
                            Status = IMPORT_STATUS.EXIST.ToString(),
                            Type = "SHANK"
                        });
                    }
                }

            if(data.Tools != null)
                // loop thought new tools
                foreach (var tool in data.Tools)
                {
                    // Check if not exist
                    if (tools.FirstOrDefault(x => x.ToolId == tool.ToolId) == null)
                    {
                        dbCtx.Tools.Add(tool);
                        importStatus.Add(new DTOImportStatusModel()
                        {
                            Id = tool.ToolId,
                            Status = IMPORT_STATUS.EXIST.ToString(),
                            Type = "TOOL"
                        });
                    }
                    else
                    {
                        importStatus.Add(new DTOImportStatusModel()
                        {
                            Id = tool.ToolId,
                            Status = IMPORT_STATUS.EXIST.ToString(),
                            Type = "TOOL"
                        });
                    }
                }
            
            // Save 
            dbCtx.SaveChanges();

            return importStatus;
        }
        
    }
}