using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Xamarin.Essentials;
using Xamarin.Forms;
using ZXing;
using Xamarin.Forms.PlatformConfiguration.AndroidSpecific;
using XF.Material.Forms.UI.Dialogs;
using comal.timesheets.QAForms;

namespace comal.timesheets
{
    public partial class ScannerPage : ContentPage
    {
        Dictionary<string, Guid> barcodeSetoutIDs = new Dictionary<string, Guid>();
        bool cacheLoaded = false;
        private bool bDocViwerOpen;
        bool bProcessing = false;
        public String Result { get; private set; }

        public delegate bool OnScanEvent(object sender, String barcode);

        public event OnScanEvent OnScan;

        public ScannerPage()
        {
            InitializeComponent();
            LoadCache();
            NavigationPage.SetHasBackButton(this, false);
            var options = new ZXing.Mobile.MobileBarcodeScanningOptions()
            {
                PossibleFormats = new List<ZXing.BarcodeFormat>() { ZXing.BarcodeFormat.QR_CODE },
                AutoRotate = false,
                TryInverted = true,
                TryHarder = true,
            };
            _scanView.Options = options;
            _scanView.IsAnalyzing = false;
            _scanView.IsScanning = true;
        }

        private void LoadCache()
        {
            Task.Run(() =>
            {
                CoreTable table = new Client<DeliveryItem>().Query
                    (
                    new Filter<DeliveryItem>(x => x.Barcode).IsNotEqualTo("").
                    And(x => x.ManufacturingPacketLink.SetoutLink.ID).IsNotEqualTo(Guid.Empty),
                    new Columns<DeliveryItem>(x => x.ManufacturingPacketLink.SetoutLink.ID, x => x.Barcode)
                    );
                if (table.Rows.Any())
                {
                    foreach (CoreRow row in table.Rows)
                    {
                        List<object> list = row.Values;
                        if (list[0] == null) list[0] = Guid.Empty;
                        if (list[1] == null) list[1] = "";
                        Guid id = Guid.Parse(list[0].ToString());
                        string barcode = list[1].ToString();
                        if (id != Guid.Empty && !string.IsNullOrWhiteSpace(barcode))
                        {
                            if (!barcodeSetoutIDs.ContainsKey(barcode))
                                barcodeSetoutIDs.Add(barcode, id);
                        }
                    }
                }
                cacheLoaded = true;
            });
        }

        protected override void OnAppearing()
        {
            base.OnAppearing();
            _scanView.IsAnalyzing = true;

        }

        protected override void OnDisappearing()
        {
            _scanView.IsAnalyzing = false;
            base.OnDisappearing();
        }

        public void _scanView_OnScanResult(ZXing.Result result)
        {
            if (bProcessing)
                return;
            Device.BeginInvokeOnMainThread(() =>
            {
                bProcessing = true;
                Vibration.Vibrate();
                bool bOK = true;
                if (OnScan != null)
                    bOK = OnScan(this, result.Text);
                if (bOK)
                {
                    Result = result.Text;
                    ProcessCode(Result);
                }
                bProcessing = false;
            });
        }

        private async void ProcessCode(string code)
        {
            if (code.StartsWith("http")) //barcode is a url
            {
                if (code.Contains("Equipment"))
                {
                    if (code.Contains("id"))
                    {
                        List<string> options = new List<string>() { "View Equipment in Timebench", "Open in Web Browser" };
                        Guid equipmentid = Guid.Parse(code.Substring(code.IndexOf("id") + 3, 36));
                        Guid kanbanid = Guid.Empty;
                        CoreTable table = new Client<Kanban>().Query(
                            new Filter<Kanban>
                            (
                                x => x.Equipment.ID).IsEqualTo(equipmentid)
                            .And(x => x.Type.ID).IsEqualTo(Guid.Parse("b8608b60-4afc-4b5b-8d94-e740a0c86f7c"))//PRE-START type     
                            .And(x => x.Completed).IsEqualTo(DateTime.MinValue),
                            new Columns<Kanban>(x => x.ID, x => x.Completed)
                            );
                        if (table.Rows.Any())
                        {
                            kanbanid = Guid.Parse(table.Rows.FirstOrDefault().Values[0].ToString());
                            if (kanbanid != Guid.Empty)
                                options.Add("Do Pre-Start");
                        }
                        string[] array = options.ToArray();
                        string chosenOption = await DisplayActionSheet("Choose an Option", "Cancel", null, array);
                        switch (chosenOption)
                        {
                            case "View Equipment in Timebench":
                                OpenEquipmentViewer(code);
                                break;
                            case "Open in Web Browser":
                                OpenWebBrowser(code);
                                break;
                            case "Do Pre-Start":
                                DoPrestart(kanbanid);
                                break;
                            case "Cancel":
                                return;
                            default:
                                return;
                        }
                    }
                }
            }
            else if (!cacheLoaded)
            {
                DisplayAlert("Alert", "Cache not loaded yet. Please try again in a few seconds", "OK");
                bProcessing = false;
                return;
            }
            if (barcodeSetoutIDs.ContainsKey(code)) //barcode is delivery item / setout
            {
                var frame_form = new FrameDetailsPage(code);
                Navigation.PushAsync(frame_form);
                bProcessing = false;
            }
            bProcessing = false;
        }

        private async void DoPrestart(Guid kanbanid)
        {
            //using (await MaterialDialog.Instance.LoadingDialogAsync(message: "Loading"))
            //{
            //    KanbanForm form = new KanbanForm();
            //    CoreTable formTable = new Client<KanbanForm>().Query(new Filter<KanbanForm>(x => x.Parent.ID).IsEqualTo(kanbanid));
            //    if (formTable.Rows.Any())
            //    {
            //        form = formTable.Rows.FirstOrDefault().ToObject<KanbanForm>();
            //    }
            //    if (form.ID == Guid.Empty)
            //    {
            //        DisplayAlert("Error", "No form found for this task - please check the task", "Cancel");
            //        return;
            //    }
            //    CoreTable table = new Client<DigitalFormLayout>().Query(
            //                     new Filter<DigitalFormLayout>(x => x.Type).IsEqualTo(DFLayoutType.Mobile).And(x => x.Active).IsEqualTo(true).And(x => x.Form.Description).IsEqualTo(form.Form.Description),
            //                     new Columns<DigitalFormLayout>(x => x.Description, x => x.ID, x => x.Code, x => x.Form.AppliesTo, x => x.Form.ID, x => x.Layout),
            //                     new SortOrder<DigitalFormLayout>(x => x.Description)
            //                    );
            //    CoreRow row = table.Rows.FirstOrDefault();
            //    DigitalFormLayout layout = row.ToObject<DigitalFormLayout>();
            //    QAFormHost digitalFormHost = new QAFormHost(layout, form, false);
            //    digitalFormHost.PreStartFormSaved += (d) =>
            //    {
            //        Kanban kanban = new Client<Kanban>().Query(new Filter<Kanban>(x => x.ID).IsEqualTo(kanbanid),
            //            new Columns<Kanban>(x => x.ID, x => x.Completed, x => x.Category)
            //            ).Rows.FirstOrDefault().ToObject<Kanban>();
            //        kanban.Category = "Complete";
            //        kanban.Completed = DateTime.Now;
            //        new Client<Kanban>().Save(kanban, "Pre Start form completed on Timebench");
            //    };
            //    Navigation.PushAsync(digitalFormHost);
            //}
        }

        private async void OpenWebBrowser(string code)
        {
            string fullUrl = code;
            Xamarin.Forms.WebView webView = new Xamarin.Forms.WebView() { Source = fullUrl };
            webView.On<Xamarin.Forms.PlatformConfiguration.Android>().EnableZoomControls(true);
            webView.On<Xamarin.Forms.PlatformConfiguration.Android>().DisplayZoomControls(true);
            bDocViwerOpen = true;
            var progress = await MaterialDialog.Instance.LoadingDialogAsync(message: "Connecting to server");
            webView.Navigated += (object sender2, WebNavigatedEventArgs e2) => { Device.BeginInvokeOnMainThread(async () => { await progress.DismissAsync(); }); };
            _scanView.IsAnalyzing = false;
            titleLbl.Text = "PRS Web Browser";
            Content = webView;
        }

        void BackBtn_Clicked(object sender, EventArgs e)
        {
            if (bDocViwerOpen)
            {
                titleLbl.Text = "Scanner";
                bDocViwerOpen = false;
                Content = scannerGrid;
                _scanView.IsAnalyzing = true;
            }
            else
            {
                Navigation.PopAsync();
            }
        }

        private async void OpenEquipmentViewer(string code)
        {
            try
            {
                using (await MaterialDialog.Instance.LoadingDialogAsync(message: "Loading"))
                {
                    CoreTable table = new Client<Equipment>().Query(
                    new Filter<Equipment>(x => x.ID).IsEqualTo(Guid.Parse(code.Substring(code.IndexOf("id") + 3, 36))),
                    new Columns<Equipment>(
                        x => x.ID, //0
                        x => x.GroupLink.ID, //1
                        x => x.GroupLink.Description, //2
                        x => x.GroupLink.Code, //3
                        x => x.Description, //4
                        x => x.Notes, //5
                        x => x.SpecificationSheet.ID //6
                        ));
                    if (table.Rows.Any())
                    {
                        List<object> list = table.Rows.FirstOrDefault().Values;
                        if (list[0] == null) list[0] = Guid.Empty; //0
                        if (list[1] == null) list[1] = Guid.Empty; //1
                        if (list[2] == null) list[2] = ""; //2
                        if (list[3] == null) list[3] = ""; //3
                        if (list[4] == null) list[4] = ""; //4
                        if (list[5] == null) list[5] = ""; //5
                        if (list[6] == null) list[6] = Guid.Empty; //6

                        Equipment equipment = new Equipment
                        {
                            ID = Guid.Parse(list[0].ToString()),
                            Description = list[4].ToString(),
                            Notes = list[5].ToString(),
                        };
                        equipment.GroupLink.ID = Guid.Parse(list[1].ToString());
                        equipment.GroupLink.Description = list[2].ToString();
                        equipment.GroupLink.Code = list[3].ToString();
                        equipment.SpecificationSheet.ID = Guid.Parse(list[6].ToString());

                        EquipmentDetailsPage page = new EquipmentDetailsPage(equipment.ID);
                        Navigation.PushAsync(page);
                    }
                }
            }
            catch (Exception e)
            {
                string message = e.Message;
            }
        }

        void Cancel_Clicked(System.Object sender, System.EventArgs e)
        {
            Result = "";
            Navigation.PopModalAsync();
        }
    }
}