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

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

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

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

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



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



        ////////////////////////////////////////////////////////////////////////////////////////////////
        //SEARCH
        //
        private async Task SearchIndexAsync(ServiceBank 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)
        {
            var obj = await ct.ServiceBank.SingleOrDefaultAsync(z => z.Id == id);
            var SearchParams = new Search.SearchIndexProcessObjectParameters();
            DigestSearchText(obj, SearchParams);
            return SearchParams;
        }

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



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

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

            bool isNew = currentObj == null;

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



            //Any form customizations to validate?
            var FormCustomization = await ct.FormCustom.AsNoTracking().SingleOrDefaultAsync(x => x.FormKey == AyaType.ServiceBank.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);
           
            }

        }

     

        ////////////////////////////////////////////////////////////////////////////////////////////////
        //REPORTING
        //
        public async Task<JArray> GetReportData(long[] idList)
        {
            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.ServiceBank.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;
                foreach (ServiceBank w in orderedList)
                {
                    var jo = JObject.FromObject(w);
                    if (!JsonUtil.JTokenIsNullOrEmpty(jo["CustomFields"]))
                        jo["CustomFields"] = JObject.Parse((string)jo["CustomFields"]);
                    ReportData.Add(jo);
                }
            }
            return ReportData;
        }


        ////////////////////////////////////////////////////////////////////////////////////////////////       
        // IMPORT EXPORT
        //

        public async Task<JArray> GetExportData(long[] idList)
        {
            //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(idList);
        }


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

            bool isNew = currentObj == null;


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

            //SPECIFIC EVENTS FOR THIS OBJECT

        }//end of process notifications




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

    }//eoc


}//eons