using System;
using System.Collections.Generic;
using AyaNova.Models;
using AyaNova.Biz;
using Microsoft.Extensions.Logging;
using Microsoft.EntityFrameworkCore;
using Bogus;
using AyaNova.Api.ControllerHelpers;
using System.Diagnostics;


namespace AyaNova.Util
{

    public static class Seeder
    {

        public enum SeedLevel { SmallOneManShopTrialDataSet, MediumLocalServiceCompanyTrialDataSet, LargeCorporateMultiRegionalTrialDataSet };


        //////////////////////////////////////////////////////
        //Seed database for trial and testing purposes
        // 
        public static void SeedDatabase(SeedLevel slevel)
        {
            ILogger log = AyaNova.Util.ApplicationLogging.CreateLogger("Seeder");
            ApiServerState apiServerState = (ApiServerState)ServiceProviderProvider.Provider.GetService(typeof(ApiServerState));

            //get the current server state so can set back to it later
            ApiServerState.ServerState wasServerState = apiServerState.GetState();
            string wasReason = apiServerState.Reason;

            try
            {
                log.LogInformation("SEEDER: SeedDatabase, level is: " + slevel.ToString());

                //Only allow this in a trial database
                if (!AyaNova.Core.License.ActiveKey.TrialLicense)
                {
                    throw new System.NotSupportedException("This database has a registered license key and can't be seeded.");
                }

                log.LogInformation("Setting server state to OpsOnly");
                apiServerState.SetOpsOnly("Seeding database");

                //Erase all the data except for the license, schema and the manager user
                DbUtil.PrepareDatabaseForSeeding(log);

                //Seed special test data for integration testing
                //log.LogInformation("Seeding known users");
                SeedKnownUsers(log);

                //log.LogInformation("Seeding all other data");
                switch (slevel)
                {

                    //This is for a busy but one man shop with a single office person handling stuff back at the shop
                    case SeedLevel.SmallOneManShopTrialDataSet:
                        //Generate owner and lead tech
                        GenSeedUser(log, 1, AuthorizationRoles.BizAdminFull | AuthorizationRoles.DispatchFull | AuthorizationRoles.InventoryFull | AuthorizationRoles.OpsAdminFull, UserType.Schedulable);

                        //Generate one office person / secretary
                        GenSeedUser(log, 1, AuthorizationRoles.DispatchFull | AuthorizationRoles.InventoryFull | AuthorizationRoles.AccountingFull, UserType.NonSchedulable);

                        //200 widgets
                        GenSeedWidget(log, 200);

                        break;
                    //This is for a typical AyaNova medium busy shop
                    //has one location, many techs and full staff for each department
                    case SeedLevel.MediumLocalServiceCompanyTrialDataSet:

                        //One IT administrator, can change ops but nothing else
                        GenSeedUser(log, 1, AuthorizationRoles.OpsAdminFull, UserType.NonSchedulable);

                        //One business administrator, can view ops issues
                        GenSeedUser(log, 1, AuthorizationRoles.BizAdminFull | AuthorizationRoles.OpsAdminLimited, UserType.NonSchedulable);

                        //One owner who doesn't control anything but views stuff
                        GenSeedUser(log, 1, AuthorizationRoles.DispatchLimited | AuthorizationRoles.InventoryLimited | AuthorizationRoles.OpsAdminLimited, UserType.NonSchedulable);

                        //20 techs
                        GenSeedUser(log, 20, AuthorizationRoles.TechFull | AuthorizationRoles.DispatchLimited, UserType.Schedulable);

                        //2 subcontractors
                        GenSeedUser(log, 2, AuthorizationRoles.SubContractorFull, UserType.Subcontractor);

                        //3 sales / generic office people people
                        GenSeedUser(log, 3, AuthorizationRoles.DispatchLimited | AuthorizationRoles.InventoryLimited, UserType.NonSchedulable);

                        //1 dispatch manager
                        GenSeedUser(log, 1, AuthorizationRoles.DispatchFull | AuthorizationRoles.InventoryLimited, UserType.NonSchedulable);

                        //1 Inventory manager
                        GenSeedUser(log, 1, AuthorizationRoles.InventoryFull | AuthorizationRoles.DispatchLimited, UserType.NonSchedulable);

                        //1 accountant / bookkeeper
                        GenSeedUser(log, 1, AuthorizationRoles.AccountingFull | AuthorizationRoles.BizAdminLimited, UserType.NonSchedulable);

                        //10 full on client users
                        GenSeedUser(log, 10, AuthorizationRoles.ClientLimited, UserType.Client);

                        //10 limited client users
                        GenSeedUser(log, 10, AuthorizationRoles.ClientLimited, UserType.Client);

                        //2000 widgets
                        GenSeedWidget(log, 2000);

                        break;
                    //this is a large corporation with multiple branches in multiple locations all in the same country
                    //Each location has a full staff and corporate head office has an overarching staff member in charge of each location
                    case SeedLevel.LargeCorporateMultiRegionalTrialDataSet:

                        //PERF
                        log.LogInformation($"Seeding user(s)....");
                        var watch = new Stopwatch();
                        watch.Start();

                        //IT administrator, can change ops but nothing else
                        GenSeedUser(log, 2, AuthorizationRoles.OpsAdminFull, UserType.NonSchedulable);

                        //business administrator, can view ops issues
                        GenSeedUser(log, 2, AuthorizationRoles.BizAdminFull | AuthorizationRoles.OpsAdminLimited, UserType.NonSchedulable);

                        //owner / upper management who doesn't control anything but views stuff
                        GenSeedUser(log, 5, AuthorizationRoles.DispatchLimited | AuthorizationRoles.InventoryLimited | AuthorizationRoles.OpsAdminLimited, UserType.NonSchedulable);

                        //techs
                        //GenSeedUser(log, 100, AuthorizationRoles.TechFull | AuthorizationRoles.DispatchLimited, UserType.Schedulable);
                        for (int i = 0; i < 20; i++)
                        {
                            GenSeedUser(log, 5, AuthorizationRoles.TechFull | AuthorizationRoles.DispatchLimited, UserType.Schedulable);
                        }


                        //limited techs
                        GenSeedUser(log, 50, AuthorizationRoles.TechLimited | AuthorizationRoles.DispatchLimited, UserType.Schedulable);

                        //20 subcontractors
                        GenSeedUser(log, 20, AuthorizationRoles.SubContractorFull, UserType.Subcontractor);

                        //10 limited subcontractors
                        GenSeedUser(log, 10, AuthorizationRoles.SubContractorLimited, UserType.Subcontractor);

                        //30 sales / generic office people people
                        GenSeedUser(log, 30, AuthorizationRoles.DispatchLimited | AuthorizationRoles.InventoryLimited, UserType.NonSchedulable);

                        //5 dispatch manager 
                        GenSeedUser(log, 5, AuthorizationRoles.DispatchFull | AuthorizationRoles.InventoryLimited, UserType.NonSchedulable);

                        //5 Inventory manager
                        GenSeedUser(log, 5, AuthorizationRoles.InventoryFull | AuthorizationRoles.DispatchLimited, UserType.NonSchedulable);

                        //10 Inventory manager assistants
                        GenSeedUser(log, 5, AuthorizationRoles.InventoryLimited, UserType.NonSchedulable);

                        //5 accountant / bookkeeper
                        GenSeedUser(log, 5, AuthorizationRoles.AccountingFull | AuthorizationRoles.BizAdminLimited, UserType.NonSchedulable);

                        //100 full on client users
                        GenSeedUser(log, 20, AuthorizationRoles.ClientFull, UserType.Client);

                        //100 limited client users
                        GenSeedUser(log, 20, AuthorizationRoles.ClientLimited, UserType.Client);

                        //PERF
                        watch.Stop();
                        log.LogInformation($"Users seeded in {watch.ElapsedMilliseconds} ms");


                        //20000 widgets
                          log.LogInformation($"Seeding Widgets....");
                         watch = new Stopwatch();
                        watch.Start();
                        GenSeedWidget(log, 20000);
                        // for (int i = 0; i < 400; i++)
                        // {
                        //     GenSeedWidget(log, 50);
                        // }
                         //PERF
                        watch.Stop();
                        log.LogInformation($"Widgets seeded in {watch.ElapsedMilliseconds} ms");

                        break;
                }

                log.LogInformation("Seeding completed successfully");
            }
            catch (Exception ex)
            {
                log.LogError(ex, "Seeder:SeedDatabase error during ops");
                throw ex;
            }
            finally
            {
                log.LogInformation($"Seeder: setting server state back to {wasServerState.ToString()}");
                apiServerState.SetState(wasServerState, wasReason);
            }
        }


        public static long RUNNING_COUNT = 0;
        public static string Uniquify(string s)
        {
            //return s + " " + ((DateTimeOffset)DateTime.Now).ToUnixTimeSeconds();
            return s + " " + (++RUNNING_COUNT).ToString();
        }


        //////////////////////////////////////////////////////
        //Seed test data for integration tests
        //
        public static void SeedKnownUsers(ILogger log)
        {
            try
            {

                //TEST USERS
                //one of each role type            
                GenSeedUser(log, 1, AuthorizationRoles.BizAdminLimited, UserType.NonSchedulable, "BizAdminLimited", "BizAdminLimited");
                GenSeedUser(log, 1, AuthorizationRoles.BizAdminFull, UserType.NonSchedulable, "BizAdminFull", "BizAdminFull");
                GenSeedUser(log, 1, AuthorizationRoles.DispatchLimited, UserType.NonSchedulable, "DispatchLimited", "DispatchLimited");
                GenSeedUser(log, 1, AuthorizationRoles.DispatchFull, UserType.NonSchedulable, "DispatchFull", "DispatchFull");
                GenSeedUser(log, 1, AuthorizationRoles.InventoryLimited, UserType.NonSchedulable, "InventoryLimited", "InventoryLimited");
                GenSeedUser(log, 1, AuthorizationRoles.InventoryFull, UserType.NonSchedulable, "InventoryFull", "InventoryFull");
                GenSeedUser(log, 1, AuthorizationRoles.AccountingFull, UserType.NonSchedulable, "Accounting", "Accounting");
                GenSeedUser(log, 1, AuthorizationRoles.TechLimited, UserType.Schedulable, "TechLimited", "TechLimited");
                GenSeedUser(log, 1, AuthorizationRoles.TechFull, UserType.Schedulable, "TechFull", "TechFull");

                GenSeedUser(log, 1, AuthorizationRoles.SubContractorLimited, UserType.Subcontractor, "SubContractorLimited", "SubContractorLimited");
                GenSeedUser(log, 1, AuthorizationRoles.SubContractorFull, UserType.Subcontractor, "SubContractorFull", "SubContractorFull");
                GenSeedUser(log, 1, AuthorizationRoles.ClientLimited, UserType.Client, "ClientLimited", "ClientLimited");
                GenSeedUser(log, 1, AuthorizationRoles.ClientFull, UserType.Client, "ClientFull", "ClientFull");

                GenSeedUser(log, 1, AuthorizationRoles.OpsAdminLimited, UserType.NonSchedulable, "OpsAdminLimited", "OpsAdminLimited");
                GenSeedUser(log, 1, AuthorizationRoles.OpsAdminFull, UserType.NonSchedulable, "OpsAdminFull", "OpsAdminFull");

                //PRIVACY TEST USER - this is used for a test to see if user info leaks into the logs
                GenSeedUser(log, 1, AuthorizationRoles.OpsAdminLimited, UserType.NonSchedulable, "TEST_PRIVACY_USER_ACCOUNT", "TEST_PRIVACY_USER_ACCOUNT");

                //TEST NOT ACTIVE - this is used for a test to see if inactive user can login
                GenSeedUser(log, 1, AuthorizationRoles.OpsAdminLimited, UserType.NonSchedulable, false, "TEST_INACTIVE", "TEST_INACTIVE");
            }
            catch
            {
                throw;
            }
        }



        /// <summary>
        /// Generate seed user with active=true
        /// (override to save typing)       
        /// </summary>
        /// <param name="log"></param>
        /// <param name="count"></param>
        /// <param name="roles"></param>
        /// <param name="userType"></param>
        /// <param name="login"></param>
        /// <param name="password"></param>
        public static void GenSeedUser(ILogger log, int count, AuthorizationRoles roles, UserType userType, string login, string password)
        {
            try
            {
                GenSeedUser(log, count, roles, userType, true, login, password);
            }
            catch
            {
                throw;
            }
        }




        public static void GenSeedUser(ILogger log, int count, AuthorizationRoles roles, UserType userType, bool active = true, string login = null, string password = null)
        {
            // log.LogInformation($"Seeding {count.ToString()} user(s)");
            //var watch = new Stopwatch();
            //watch.Start();


            UserBiz Biz = UserBiz.GetBizInternal(ServiceProviderProvider.DBContext);
            //allow creation of not entirely ready users (missing client id or subcontractor vendor id etc)
            Biz.SeedOrImportRelaxedRulesMode = true;

            for (int x = 0; x < count; x++)
            {
                User u = new User();
                u.Active = active;
                u.OwnerId = 1;
                var p = new Bogus.Person();
                u.Name = Uniquify(p.FullName);
                // u.Salt = Hasher.GenerateSalt();
                if (login != null)
                {
                    u.Login = login;
                    u.Name += " - " + login;
                }
                else
                    u.Login = p.FirstName;

                if (password != null)
                    u.Password = password;//u.Password = Hasher.hash(u.Salt, password);
                else
                    u.Password = u.Login;//u.Password = Hasher.hash(u.Salt, u.Login);
                u.Roles = roles;
                u.LocaleId = ServerBootConfig.AYANOVA_DEFAULT_LANGUAGE_ID;
                u.UserType = userType;
                //TODO: After have USER and HEADOFFICE and VENDOR, if usertype is subcontractor or client or headoffice it needs to set a corresponding user's parent org record id to go with it

                //Children and relations
                u.UserOptions = new UserOptions(1);
                u.UserOptions.EmailAddress = p.Email.Replace("gmail.com", "helloayanova.com").Replace("hotmail.com", "helloayanova.com").Replace("yahoo.com", "helloayanova.com");


                //Re-instantiating the biz object in the loop speeds it up probably due to db context losing changes to track from before
                // UserBiz Biz = UserBiz.GetBizInternal(ServiceProviderProvider.DBContext);
                // //allow creation of not entirely ready users (missing client id or subcontractor vendor id etc)
                // Biz.SeedOrImportRelaxedRulesMode = true;

                var NewObject = Biz.Create(ServiceProviderProvider.DBContext, u);//sync version faster than async one
                if (NewObject == null)
                {
                    log.LogError($"Seeder::GenSeedUser error creating user {u.Name}\r\n" + Biz.GetErrorsAsString());
                    throw new System.Exception("Seeder::GenSeedUser error creating user\r\n" + Biz.GetErrorsAsString());
                }
            }
            // watch.Stop();
            // log.LogInformation($"{count.ToString()} user(s) seeded in {watch.ElapsedMilliseconds} ms");
        }

        //////////////////////////////////////////////////////
        //Seed widget for testing
        //
        public static void GenSeedWidget(ILogger log, int count)
        {
            log.LogInformation($"Seeding {count.ToString()} Widget(s)");
            var watch = new Stopwatch();
            watch.Start();
            //get a context just for this op to save memory on changetracking
            //AyContext ct = ServiceProviderProvider.DBContext;
            WidgetBiz Biz = WidgetBiz.GetBizInternal(ServiceProviderProvider.DBContext);
            var f = new Bogus.Faker();
            for (int x = 0; x < count; x++)
            {
                Widget o = new Widget();
                o.Name = Uniquify(f.Commerce.ProductName());
                o.Active = true;
                o.StartDate = f.Date.Between(DateTime.Now, DateTime.Now.AddMinutes(60));
                o.EndDate = f.Date.Between(DateTime.Now.AddMinutes(90), DateTime.Now.AddHours(5));
                o.DollarAmount = Convert.ToDecimal(f.Commerce.Price());
                o.OwnerId = 1;
                //this is nonsense but just to test an enum
                o.Roles = AuthorizationRoles.DispatchLimited | AuthorizationRoles.InventoryLimited | AuthorizationRoles.OpsAdminLimited;
                o.Notes = f.Lorem.Paragraph();
                var NewObject = Biz.Create(ServiceProviderProvider.DBContext, o);
                if (NewObject == null)
                {
                    log.LogError($"Seeder::GenSeedWidget error creating widget {o.Name}\r\n" + Biz.GetErrorsAsString());
                    throw new System.Exception("Seeder::GenSeedWidget error creating widget\r\n" + Biz.GetErrorsAsString());
                }
            }
            watch.Stop();
            log.LogInformation($"{count.ToString()} Widget(s) seeded in {watch.ElapsedMilliseconds} ms");
        }

    }//eoc



}//eons