using OptimaJet.Workflow.Core.Runtime;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Configuration;
using OptimaJet.Workflow.Core.Builder;
using System.Xml.Linq;
using OptimaJet.Workflow.Core.Parser;
using OptimaJet.Workflow.Core.Bus;
using System.Reflection;
using OptimaJet.Workflow.Core.Persistence;
using EnVisage;
using EnVisage.Code.WorkFlow;

namespace EnVisage.Code
{
    public static class WorkFlowEngine
    {
        private static volatile WorkflowRuntime _runtime;

        private static readonly object _sync = new object();

        public static WorkflowRuntime Runtime(string connectionString)
        {

            if (_runtime == null)
            {
                lock (_sync)
                {
                    if (_runtime == null)
                    {

                        if (ConfigurationManager.ConnectionStrings["DefaultConnection"] != null)
                             connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;

                            var provider = new OptimaJet.Workflow.DbPersistence.MSSQLProvider(connectionString);

                        var builder = new WorkflowBuilder<XElement>(provider,
                            new XmlWorkflowParser(),
                            provider
                            ).WithDefaultCache();
                        WorkflowRuntime.RegisterLicense("Nelnet-TmVsbmV0OjA4LjE4LjIwMTc6ZXlKTllYaE9kVzFpWlhKUFprRmpkR2wyYVhScFpYTWlPaTB4TENKTllYaE9kVzFpWlhKUFpsUnlZVzV6YVhScGIyNXpJam90TVN3aVRXRjRUblZ0WW1WeVQyWlRZMmhsYldWeklqb3RNU3dpVFdGNFRuVnRZbVZ5VDJaVWFISmxZV1J6SWpvdE1Td2lUV0Y0VG5WdFltVnlUMlpEYjIxdFlXNWtjeUk2TFRGOTpBYTJlL2hSTWZpQlhyZVduWGlaV2tRdXZ0bEt4Q3R3UFAzb2N6QkZwL0NJWU83cWFmaXRvcTUyVkwybm5EUFl0M3ZFVHBGVmpxaWM4azJWQXQwQVgzMjcxV0FCeno0dVpMMnYxcElaa2dkeTlHc0xQbHN5VTloNHRkeDNmT3JDN3Z0NXhWekR5eVRkUUtDMTN2NjZFeGNYUmJ6UXFLYTQwL3ZNTDdGUnU2Tm89");
                           _runtime = new WorkflowRuntime(new Guid("{8D38DB8F-F3D5-4F26-A989-4FDD40F32D9D}"))
                        // _runtime = new WorkflowRuntime(Guid.NewGuid())
                            .WithBuilder(builder)
                            .WithActionProvider(new EnVisage.Code.WorkflowActions())
                            .WithRuleProvider(new WorkflowRule())
                            .WithPersistenceProvider(provider)
                            .WithTimerManager(new TimerManager())
                            .WithBus(new NullBus())
                            .SwitchAutoUpdateSchemeBeforeGetAvailableCommandsOn()
                            .RegisterAssemblyForCodeActions(Assembly.GetExecutingAssembly())
                            .RegisterAssemblyForCodeActions(Assembly.GetAssembly(typeof(System.Data.Linq.DataContext)))
                            .Start();

                        _runtime.ProcessStatusChanged += _runtime_ProcessStatusChanged;
                    }
                }
            }
            return _runtime;
        }

        static void _runtime_ProcessStatusChanged(object sender, ProcessStatusChangedEventArgs e)
        {
        if (e.NewStatus != ProcessStatus.Idled && e.NewStatus != ProcessStatus.Finalized)
                return;
            
             
            if (string.IsNullOrEmpty(e.SchemeCode))
                return;


            _runtime.PreExecuteFromCurrentActivity(e.ProcessId);

            if (!string.IsNullOrEmpty(e.ProcessInstance.ExecutedTimer))
                return;
            if (string.IsNullOrEmpty(e.ProcessInstance.IdentityId))
                return;

            var p = (OptimaJet.Workflow.DbPersistence.MSSQLProvider) _runtime.PersistenceProvider;
            using (var context = EnVisageEntities.PrevuEntity(p.ConnectionString, true))
            {
                try
                {
                    var userid = Guid.Parse(e.ProcessInstance.IdentityId);
                    var processId = e.ProcessId;
                    var processIdStr = e.ProcessId.ToString();
                    var projectId = context.Scenarios.Where(x => x.Id == processId).Select(x => x.ParentId).FirstOrDefault();
                    if (!projectId.HasValue)
                        return;
                    var projectIdstr = projectId.Value.ToString();
                    var state = _runtime.GetCurrentState(processId);
                    var notificationsToRemove = context.Notifications.Where(x => (x.IdinLink == processId || x.IdinLink == projectId.Value 
                    || x.Link.Contains(projectIdstr) || x.Link.Contains(processIdStr)) && x.WorkFlowState != null &&
                    (x.WorkFlowState != state.Name || x.WorkFlowState != state.VisibleName) && x.ParentId != userid).ToList();
                    context.Notifications.RemoveRange(notificationsToRemove);
                    context.SaveChanges();
                }catch(Exception clearNotificationEx)
                {

                }
            }

        }

        #region Inbox
        private static void FillInboxCallback(IAsyncResult ar)
        {
            
        }

        private static void PreExecuteAndFillInbox(ProcessStatusChangedEventArgs e)
        {
            var processId = e.ProcessId;
            var p = (OptimaJet.Workflow.DbPersistence.MSSQLProvider) _runtime.PersistenceProvider;
             using (var context =  EnVisageEntities.PrevuEntity(p.ConnectionString, true))
            {
                FillInbox(processId, context);

                context.SaveChanges();
            }
        }

        private static void FillInbox(Guid processId, EnVisageEntities context)
        {
            try
            {
                var newActors = Runtime(context.Database.Connection.ConnectionString).GetAllActorsForDirectCommandTransitions(processId);
                foreach (var newActor in newActors)
                {
                    var users = context.User2WorkFlowRole.Where(x => x.WorkFlowRole.RoleName == newActor).Select(x => x.AspNetUser.Id).ToList();
                    foreach (var user in users)
                    {
                        var newInboxItem = new WorkflowInbox() { Id = Guid.NewGuid(), IdentityId = new Guid(user), ProcessId = processId };
                        context.WorkflowInboxes.Add(newInboxItem);
                    }
                }
            }
            catch (Exception dd) { }
        }
        #endregion
    }
}