using System;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using System.Linq;
using Sockeye.Util;
using Sockeye.Api.ControllerHelpers;
using Sockeye.Models;
using Newtonsoft.Json.Linq;
using System.Collections.Generic;
using Microsoft.Extensions.Logging;

namespace Sockeye.Biz
{
    internal class CustomerNoteBiz : BizObject, ISearchAbleObject, IReportAbleObject, IExportAbleObject, INotifiableObject
    {
        internal CustomerNoteBiz(AyContext dbcontext, long currentUserId, long userTranslationId, AuthorizationRoles UserRoles)
        {
            ct = dbcontext;
            UserId = currentUserId;
            UserTranslationId = userTranslationId;
            CurrentUserRoles = UserRoles;
            BizType = SockType.CustomerNote;
        }

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

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

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //CREATE   
        //
        internal async Task<CustomerNote> CreateAsync(CustomerNote newObject)
        {
            //await ValidateAsync(newObject, null);
            if (HasErrors)
                return null;
            else
            {
                newObject.Tags = TagBiz.NormalizeTags(newObject.Tags);
                await ct.CustomerNote.AddAsync(newObject);
                await ct.SaveChangesAsync();
                await EventLogProcessor.LogEventToDatabaseAsync(new Event(UserId, newObject.Id, BizType, SockEvent.Created), ct);
                await SearchIndexAsync(newObject, true);
                await TagBiz.ProcessUpdateTagsInRepositoryAsync(ct, newObject.Tags, null);

                return newObject;
            }
        }


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

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //UPDATE
        //
        internal async Task<CustomerNote> PutAsync(CustomerNote putObject)
        {
            CustomerNote 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;
            }

            putObject.Tags = TagBiz.NormalizeTags(putObject.Tags);
            //no validate required
            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, SockEvent.Modified), ct);
            await SearchIndexAsync(putObject, false);
            await TagBiz.ProcessUpdateTagsInRepositoryAsync(ct, putObject.Tags, dbObject.Tags);
            return putObject;
        }

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //DELETE
        //
        internal async Task<bool> DeleteAsync(long id, Microsoft.EntityFrameworkCore.Storage.IDbContextTransaction parentTransaction = null)
        {
            //this may be part of a larger delete operation involving other objects (e.g. Customer delete and remove contacts)
            //if so then there will be a parent transaction otherwise we make our own
            Microsoft.EntityFrameworkCore.Storage.IDbContextTransaction transaction = null;
            if (parentTransaction == null)
                transaction = await ct.Database.BeginTransactionAsync();

            CustomerNote dbObject = await GetAsync(id, false);
            if (dbObject == null)
            {
                AddError(ApiErrorCode.NOT_FOUND);
                return false;
            }
            if (HasErrors)
                return false;
            if (HasErrors)
                return false;
            ct.CustomerNote.Remove(dbObject);
            await ct.SaveChangesAsync();


            await EventLogProcessor.DeleteObjectLogAsync(UserId, BizType, dbObject.Id, "CustomerNote", ct);
            await Search.ProcessDeletedObjectKeywordsAsync(dbObject.Id, BizType, ct);
            await TagBiz.ProcessDeleteTagsInRepositoryAsync(ct, dbObject.Tags);
            await FileUtil.DeleteAttachmentsForObjectAsync(BizType, dbObject.Id, ct);
            //all good do the commit if it's ours
            if (parentTransaction == null)
                await transaction.CommitAsync();


            return true;

        }

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //SEARCH
        //
        private async Task SearchIndexAsync(CustomerNote 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, SockType specificType)
        {
            var obj = await GetAsync(id);
            var SearchParams = new Search.SearchIndexProcessObjectParameters();
            DigestSearchText(obj, SearchParams);
            return SearchParams;
        }

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



        ////////////////////////////////////////////////////////////////////////////////////////////////
        //REPORTING
        //
        public async Task<JArray> GetReportData(DataListSelectedRequest dataListSelectedRequest, Guid jobId)
        {
            var idList = dataListSelectedRequest.SelectedRowIds;
            JArray ReportData = new JArray();
            while (idList.Any())
            {
                var batch = idList.Take(IReportAbleObject.REPORT_DATA_BATCH_SIZE);
                idList = idList.Skip(IReportAbleObject.REPORT_DATA_BATCH_SIZE).ToArray();
                //query for this batch, comes back in db natural order unfortunately
                var batchResults = await ct.CustomerNote.AsNoTracking().Where(z => batch.Contains(z.Id)).ToArrayAsync();
                //order the results back into original
                var orderedList = from id in batch join z in batchResults on id equals z.Id select z;
                batchResults = null;
                foreach (CustomerNote w in orderedList)
                {
                    if (!ReportRenderManager.KeepGoing(jobId)) return null;
                    await PopulateVizFields(w);
                    var jo = JObject.FromObject(w);
                    ReportData.Add(jo);
                }
                orderedList = null;
            }
            vc.Clear();
            return ReportData;
        }

        //populate viz fields from provided object
        private async Task PopulateVizFields(CustomerNote o)
        {           
            if (!vc.Has("customer", o.CustomerId))            
                vc.Add(await ct.Customer.AsNoTracking().Where(x => x.Id == o.CustomerId).Select(x => x.Name).FirstOrDefaultAsync(), "customer", o.CustomerId);            
            o.CustomerViz = vc.Get("customer", o.CustomerId);

            if (!vc.Has("user", o.UserId))            
                vc.Add(await ct.User.AsNoTracking().Where(x => x.Id == o.UserId).Select(x => x.Name).FirstOrDefaultAsync(), "user", o.UserId);            
            o.UserViz = vc.Get("user", o.UserId);

        }        
        private VizCache vc = new VizCache();


        ////////////////////////////////////////////////////////////////////////////////////////////////       
        // IMPORT EXPORT
        //
        public async Task<JArray> GetExportData(DataListSelectedRequest dataListSelectedRequest, Guid jobId)
        {
            //for now just re-use the report data code
            //this may turn out to be the pattern for most biz object types but keeping it seperate allows for custom usage from time to time
            return await GetReportData(dataListSelectedRequest, jobId);
        }

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

        // private async Task ValidateAsync(CustomerNote proposedObj, CustomerNote currentObj)
        // {

        //     // bool isNew = currentObj == null;




        //     // //Any form customizations to validate?
        //     // var FormCustomization = await ct.FormCustom.AsNoTracking().SingleOrDefaultAsync(x => x.FormKey == SockType.CustomerNote.ToString());
        //     // if (FormCustomization != null)
        //     // {
        //     //     //Yeppers, do the validation, there are two, the custom fields and the regular fields that might be set to required

        //     //     //validate users choices for required non custom fields
        //     //     RequiredFieldsValidator.Validate(this, FormCustomization, proposedObj);

        //     //     //validate custom fields
        //     //     CustomFieldsValidator.Validate(this, FormCustomization, proposedObj.CustomFields);
        //     // }

        // }

        // private void ValidateCanDelete(CustomerNote inObj)
        // {
        //     //whatever needs to be check to delete this object
        // }


        ////////////////////////////////////////////////////////////////////////////////////////////////
        // NOTIFICATION PROCESSING
        //
        public async Task HandlePotentialNotificationEvent(SockEvent ayaEvent, ICoreBizObjectModel proposedObj, ICoreBizObjectModel currentObj = null)
        {
            
            if (ServerBootConfig.MIGRATING) return;
            ILogger log = Sockeye.Util.ApplicationLogging.CreateLogger<CustomerNoteBiz>();
            log.LogDebug($"HandlePotentialNotificationEvent processing:  [SockType:{this.BizType}, AyaEvent:{ayaEvent}]");

            bool isNew = currentObj == null;
            var oProposed = (CustomerNote)proposedObj;
            oProposed.CustomerViz = await ct.Customer.AsNoTracking().Where(x => x.Id == oProposed.CustomerId).Select(x => x.Name).FirstOrDefaultAsync();
            proposedObj.Name = oProposed.CustomerViz;

            //STANDARD EVENTS FOR ALL OBJECTS
            await NotifyEventHelper.ProcessStandardObjectEvents(ayaEvent, proposedObj, ct);

            //SPECIFIC EVENTS FOR THIS OBJECT

        }//end of process notifications


        ////////////////////////////////////////////////////////////////////////////////////////////////
        //JOB / OPERATIONS
        //


        //Other job handlers here...


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

    }//eoc


}//eons