using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using AyaNova.Util;
using AyaNova.Api.ControllerHelpers;
using AyaNova.Models;
using System.Linq;

namespace AyaNova.Biz
{
    internal class WorkOrderStatusBiz : BizObject, ISearchAbleObject
    {
        internal WorkOrderStatusBiz(AyContext dbcontext, long currentUserId, long userTranslationId, AuthorizationRoles UserRoles)
        {
            ct = dbcontext;
            UserId = currentUserId;
            UserTranslationId = userTranslationId;
            CurrentUserRoles = UserRoles;
            BizType = AyaType.WorkOrderStatus;
        }

        internal static WorkOrderStatusBiz GetBiz(AyContext ct, Microsoft.AspNetCore.Http.HttpContext httpContext = null)
        {
            if (httpContext != null)
                return new WorkOrderStatusBiz(ct, UserIdFromContext.Id(httpContext.Items), UserTranslationIdFromContext.Id(httpContext.Items), UserRolesFromContext.Roles(httpContext.Items));
            else
                return new WorkOrderStatusBiz(ct, 1, ServerBootConfig.AYANOVA_DEFAULT_TRANSLATION_ID, AuthorizationRoles.BizAdmin);
        }

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //EXISTS 
        internal async Task<bool> ExistsAsync(long id)
        {
            return await ct.WorkOrderStatus.AnyAsync(z => z.Id == id);
        }

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //CREATE   
        //
        internal async Task<WorkOrderStatus> CreateAsync(WorkOrderStatus newObject)
        {
            await ValidateAsync(newObject, null);
            if (HasErrors)
                return null;
            else
            {
                await ct.WorkOrderStatus.AddAsync(newObject);
                await ct.SaveChangesAsync();
                await EventLogProcessor.LogEventToDatabaseAsync(new Event(UserId, newObject.Id, BizType, AyaEvent.Created), ct);
                await SearchIndexAsync(newObject, true);
                return newObject;
            }
        }

        // ////////////////////////////////////////////////////////////////////////////////////////////////
        // //DUPLICATE
        // //
        // internal async Task<WorkOrderStatus> DuplicateAsync(long id)
        // {
        //     var dbObject = await GetAsync(id, false);
        //     if (dbObject == null)
        //     {
        //         AddError(ApiErrorCode.NOT_FOUND, "id");
        //         return null;
        //     }
        //     WorkOrderStatus newObject = new WorkOrderStatus();
        //     CopyObject.Copy(dbObject, newObject);
        //     string newUniqueName = string.Empty;
        //     bool NotUnique = true;
        //     long l = 1;
        //     do
        //     {
        //         newUniqueName = Util.StringUtil.UniqueNameBuilder(dbObject.Name, l++, 255);
        //         NotUnique = await ct.WorkOrderStatus.AnyAsync(m => m.Name == newUniqueName);
        //     } while (NotUnique);
        //     newObject.Name = newUniqueName;
        //     newObject.Id = 0;
        //     newObject.Concurrency = 0;
        //     await ct.WorkOrderStatus.AddAsync(newObject);
        //     await ct.SaveChangesAsync();
        //     await EventLogProcessor.LogEventToDatabaseAsync(new Event(UserId, newObject.Id, BizType, AyaEvent.Created), ct);
        //     await SearchIndexAsync(newObject, true);
        //     return newObject;
        // }

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //GET 
        //      
        internal async Task<WorkOrderStatus> GetAsync(long id, bool logTheGetEvent = true)
        {
            var ret = await ct.WorkOrderStatus.AsNoTracking().SingleOrDefaultAsync(m => m.Id == id);
            if (logTheGetEvent && ret != null)
                await EventLogProcessor.LogEventToDatabaseAsync(new Event(UserId, id, BizType, AyaEvent.Retrieved), ct);
            return ret;
        }

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //UPDATE
        //
        internal async Task<WorkOrderStatus> PutAsync(WorkOrderStatus putObject)
        {
            var dbObject = await GetAsync(putObject.Id, false);
            if (dbObject == null)
            {
                AddError(ApiErrorCode.NOT_FOUND, "id");
                return null;
            }
            if (dbObject.Concurrency != putObject.Concurrency)
            {
                AddError(ApiErrorCode.CONCURRENCY_CONFLICT);
                return null;
            }


            await ValidateAsync(putObject, dbObject);
            if (HasErrors) return null;
            ct.Replace(dbObject, putObject);
            try
            {
                await ct.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!await ExistsAsync(putObject.Id))
                    AddError(ApiErrorCode.NOT_FOUND);
                else
                    AddError(ApiErrorCode.CONCURRENCY_CONFLICT);
                return null;
            }
            await EventLogProcessor.LogEventToDatabaseAsync(new Event(UserId, dbObject.Id, BizType, AyaEvent.Modified), ct);
            await SearchIndexAsync(putObject, false);
            return putObject;
        }

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //DELETE
        //
        internal async Task<bool> DeleteAsync(long id)
        {
            using (var transaction = await ct.Database.BeginTransactionAsync())
            {
                var dbObject = await GetAsync(id, false);
                if (dbObject == null)
                {
                    AddError(ApiErrorCode.NOT_FOUND);
                    return false;
                }
                await ValidateCanDeleteAsync(dbObject);
                if (HasErrors)
                    return false;
                {
                    var IDList = await ct.Review.AsNoTracking().Where(x => x.AType == AyaType.WorkOrderStatus && x.ObjectId == id).Select(x => x.Id).ToListAsync();
                    if (IDList.Count() > 0)
                    {
                        ReviewBiz b = new ReviewBiz(ct, UserId, UserTranslationId, CurrentUserRoles);
                        foreach (long ItemId in IDList)
                            if (!await b.DeleteAsync(ItemId, transaction))
                            {
                                AddError(ApiErrorCode.CHILD_OBJECT_ERROR, null, $"Review [{ItemId}]: {b.GetErrorsAsString()}");
                                return false;
                            }
                    }
                }
                ct.WorkOrderStatus.Remove(dbObject);
                await ct.SaveChangesAsync();

                //Log event 
                await EventLogProcessor.DeleteObjectLogAsync(UserId, BizType, dbObject.Id, dbObject.Name, ct);
                await Search.ProcessDeletedObjectKeywordsAsync(dbObject.Id, BizType, ct);
                await FileUtil.DeleteAttachmentsForObjectAsync(BizType, dbObject.Id, ct);
                await transaction.CommitAsync();
                return true;
            }
        }



        ////////////////////////////////////////////////////////////////////////////////////////////////
        //SEARCH
        //
        private async Task SearchIndexAsync(WorkOrderStatus obj, bool isNew)
        {
            var SearchParams = new Search.SearchIndexProcessObjectParameters(UserTranslationId, obj.Id, BizType);
            DigestSearchText(obj, SearchParams);
            if (isNew)
                await Search.ProcessNewObjectKeywordsAsync(SearchParams);
            else
                await Search.ProcessUpdatedObjectKeywordsAsync(SearchParams);
        }

        public async Task<Search.SearchIndexProcessObjectParameters> GetSearchResultSummary(long id, AyaType specificType)
        {
            var obj = await GetAsync(id, false);
            var SearchParams = new Search.SearchIndexProcessObjectParameters();
            DigestSearchText(obj, SearchParams);
            return SearchParams;
        }

        public void DigestSearchText(WorkOrderStatus obj, Search.SearchIndexProcessObjectParameters searchParams)
        {
            if (obj != null)
                searchParams.AddText(obj.Notes)
                            .AddText(obj.Name);
        }



        ////////////////////////////////////////////////////////////////////////////////////////////////
        //VALIDATION
        //

        private async Task ValidateAsync(WorkOrderStatus proposedObj, WorkOrderStatus currentObj)
        {

            bool isNew = currentObj == null;

            //Name required
            if (string.IsNullOrWhiteSpace(proposedObj.Name))
                AddError(ApiErrorCode.VALIDATION_REQUIRED, "Name");



            //If name is otherwise OK, check that name is unique
            if (!PropertyHasErrors("Name"))
            {
                //Use Any command is efficient way to check existance, it doesn't return the record, just a true or false
                if (await ct.WorkOrderStatus.AnyAsync(m => m.Name == proposedObj.Name && m.Id != proposedObj.Id))
                {
                    AddError(ApiErrorCode.VALIDATION_NOT_UNIQUE, "Name");
                }
            }

        }

        private async Task ValidateCanDeleteAsync(WorkOrderStatus inObj)
        {
           
            await Task.CompletedTask;
            //Referential integrity 
            //FOREIGN KEY CHECKS          
            if (await ct.WorkOrderState.AnyAsync(m => m.WorkOrderStatusId == inObj.Id))
                AddError(ApiErrorCode.VALIDATION_REFERENTIAL_INTEGRITY, "generalerror", await Translate("WorkOrderStatus"));
        }







        /////////////////////////////////////////////////////////////////////

    }//eoc


}//eons