using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using Comal.Classes;
using InABox.Configuration;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using InABox.Wpf;

namespace PRSDesktop
{

    public class EmployeePanelSettings : IUserConfigurationSettings
    {
        public DynamicSplitPanelView View { get; set; }
        public double AnchorWidth { get; set; }
        
        public double RoleHeight { get; set; }
        public double RosterHeight { get; set; }

        public EmployeePanelSettings()
        {
            View = DynamicSplitPanelView.Combined;
            AnchorWidth = 250;
            RoleHeight = 250;
            RosterHeight = 400;
        }
    }
    
    /// <summary>
    ///     Interaction logic for EmployeePanel.xaml
    /// </summary>
    public partial class EmployeePanel : UserControl, IPanel<Employee>
    {

        private enum Suppress
        {
            Events
        }

        private EmployeePanelSettings _settings;

        private void DoLoadSettings()
        {
            using (new EventSuppressor(Suppress.Events))
            {
                _settings = new UserConfiguration<EmployeePanelSettings>().Load();

                SplitPanel.View = _settings.View;
                SplitPanel.AnchorWidth = _settings.AnchorWidth;
                RoleGridRow.Height = new GridLength(_settings.RoleHeight, GridUnitType.Pixel);
                RosterGridRow.Height = new GridLength(_settings.RosterHeight, GridUnitType.Pixel);
             }
        }
        
        private void DoSaveSettings()
        {
            _settings.View = SplitPanel.View;
            _settings.AnchorWidth = SplitPanel.AnchorWidth;
            _settings.RoleHeight = RoleGridRow.Height.Value;
            _settings.RosterHeight = RosterGridRow.Height.Value;
            new UserConfiguration<EmployeePanelSettings>().Save(_settings);
        }
        
        public EmployeePanel()
        {
            using (new EventSuppressor(Suppress.Events))
                InitializeComponent();
        }

        public bool IsReady { get; set; }


        public event DataModelUpdateEvent? OnUpdateDataModel;

        public Dictionary<string, object[]> Selected()
        {
            return new Dictionary<string, object[]> { { typeof(Employee).EntityName(), Employees.SelectedRows } };
        }

        public void Setup()
        {
            using (new EventSuppressor(Suppress.Events))
            {
                DoLoadSettings();

                Employees.HiddenColumns.Add(x => x.RosterTemplate.ID);
                Employees.HiddenColumns.Add(x => x.RosterStart);

                Employees.Refresh(true, false);
                Rosters.Refresh(true, false);
                Teams.Refresh(true, false);
                Roles.Refresh(true, false);
                Activities.Refresh(true, false);
                Forms.Refresh(true, false);
                Qualifications.Refresh(true, false);
                Spreadsheets.Refresh(true, false);
                Jobs.Refresh(true, false);

                RoleCrossTab.Visibility = Security.CanView<Employee>()
                    && Security.CanView<Role>()
                    && Security.CanView<EmployeeRole>() ? Visibility.Visible : Visibility.Collapsed;
                var visibleTabItems = Tab.Items.OfType<DynamicTabItem>().Where(x => x.Visibility == Visibility.Visible).ToList();
                if(visibleTabItems.Count <= 1)
                {
                    foreach(var tab in visibleTabItems)
                    {
                        tab.Visibility = Visibility.Collapsed;
                        Tab.SelectedItem = tab;
                    }
                }
            }
        }

        public void Shutdown(CancelEventArgs? cancel)
        {
        }

        public void CreateToolbarButtons(IPanelHost host)
        {
            HumanResourcesSetupActions.SecurityGroups(host);
            host.CreateSetupSeparator();
            HumanResourcesSetupActions.EmployeeGroups(host);
            HumanResourcesSetupActions.EmployeePositions(host);
            HumanResourcesSetupActions.EmployeeRoles(host);
            HumanResourcesSetupActions.EmployeeTeams(host);
            HumanResourcesSetupActions.EmployeeActivities(host);
            HumanResourcesSetupActions.EmployeeQualifications(host);
            HumanResourcesSetupActions.EmployeeRosters(host);
            host.CreateSetupSeparator();
            HumanResourcesSetupActions.EmployeeOvertimeRules(host);
            HumanResourcesSetupActions.EmployeeOvertime(host);
            HumanResourcesSetupActions.EmployeeStandardLeave(host);
            host.CreateSetupSeparator();
            HumanResourcesSetupActions.EmployeeSpreadsheetTemplates(host);
        }

        private bool _loaded = false;

        private void Tab_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (sender != Tab || !_loaded) return;
            RefreshCurrentTab();
        }

        private void RefreshCurrentTab()
        {
            if (Tab.SelectedTab == EmployeeTab)
            {
                RefreshEmployeeTab();
            }
            else if (Tab.SelectedTab == RoleCrossTab)
            {
                RefreshRoleTab();
            }
        }

        private void RefreshRoleTab()
        {
            EmployeeRoles.Refresh(true, true);
        }

        private void RefreshEmployeeTab()
        {
            Employees.Refresh(false, true);
            Rosters.Refresh(false, true);
            Teams.Refresh(false, true);
            Roles.Refresh(false, true);
            Activities.Refresh(false, true);
            Forms.Refresh(false, true);
            Qualifications.Refresh(false, true);
            Spreadsheets.Refresh(false, true);
            Jobs.Refresh(false, true);
        }

        public void Refresh()
        {
            RefreshCurrentTab();
            _loaded = true;
        }

        public string SectionName => "Employees";

        public DataModel DataModel(Selection selection)
        {
            var ids = Employees.ExtractValues(x => x.ID, selection).ToArray();
            return new AutoDataModel<Employee>(new Filter<Employee>(x => x.ID).InList(ids));
        }

        public void Heartbeat(TimeSpan time)
        {
        }

        public Dictionary<Type, CoreTable> DataEnvironment()
        {
            var env = new Dictionary<Type, CoreTable>();
            env[typeof(Job)] = Employees.Data;
            return env;
        }

        private void Employees_OnOnSelectItem(object sender, DynamicGridSelectionEventArgs e)
        {
            var employee = e.Rows?.FirstOrDefault()?.ToObject<Employee>() ?? new Employee();

            Rosters.Load(employee, null);
            //Rosters.Refresh(false, true);

            Teams.EmployeeID = employee.ID;
            Teams.Refresh(false, true);

            //LoadEmployeeThumbnail(employee.Thumbnail.ID);
            
            Roles.EmployeeID = employee.ID;
            Roles.Refresh(false, true);

            Activities.Left = employee;
            Activities.Refresh(false,true);

            Forms.Left = employee;
            Forms.Refresh(false, true);
            
            Qualifications.Load(employee, null);

            Spreadsheets.Master = employee;
            Spreadsheets.Refresh(false,true);

            Jobs.Left = employee;
            Jobs.Refresh(false, true);
        }

        // private void LoadEmployeeThumbnail(Guid imageid)
        // {
        //     Thumbnail.Source = null;
        //     if (imageid == Guid.Empty)
        //         return;
        //     Bitmap result = null;
        //     new Client<Document>().Query(
        //         new Filter<Document>(x => x.ID).IsEqualTo(imageid),
        //         new Columns<Document>(x => x.ID, x => x.Data),
        //         null,
        //         (o, e) => Dispatcher.Invoke(() =>
        //         {
        //             if (o?.Rows.Any() == true)
        //             {
        //                 var ms = new MemoryStream(o.Rows.First().Get<Document, byte[]>(x => x.Data));
        //                 Thumbnail.Source = new Bitmap(ms).AsBitmapImage();
        //             }
        //         })
        //     );
        // }

        private void SplitPanel_OnChanged(object sender, DynamicSplitPanelSettings e)
        {
            if (EventSuppressor.IsSet(Suppress.Events))
                return;
            DoSaveSettings();
        }
        
        private void Roles_OnSizeChanged(object sender, SizeChangedEventArgs e)
        {
            if (EventSuppressor.IsSet(Suppress.Events))
                return;
            DoSaveSettings();
        }
        
        private void Roles_OnOnChanged(object sender, EventArgs args)
        {
            Activities.Refresh(false,true);
            Forms.Refresh(false, true);
        }


        private void Rosters_OnOnChanged(object sender, EventArgs args)
        {
            //Employees.Refresh(false, true);
        }

        private void Rosters_OnSizeChanged(object sender, SizeChangedEventArgs e)
        {
            if (EventSuppressor.IsSet(Suppress.Events))
                return;
            DoSaveSettings();
        }

        private void Rosters_EmployeeChanged()
        {
            Employees.Refresh(false, true);
        }
    }
}