using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using Pos.Models;
using Pos.Service;

namespace Pos
{
    /// <summary>
    /// Interaction logic for PrintReceiptWindow.xaml
    /// </summary>
    public partial class PrintReceiptWindow : Window
    {
        private List<ListReceiptModel> _receiptList = new List<ListReceiptModel>();
        private bool _init = false;
        private int _saleId = 0;
        private readonly SaleHistoryService _saleHistoryService =
            new SaleHistoryService();
        private readonly SaleService _saleService = new SaleService();

        public PrintReceiptWindow()
        {
            InitializeComponent();

            StartDatePicker.DisplayDate = DateTime.Now.AddDays(-7);
            StartDatePicker.SelectedDate = DateTime.Now.AddDays(-7);
            EndDatePicker.DisplayDate = DateTime.Now;
            EndDatePicker.SelectedDate = DateTime.Now;
        }

        private void Search_OnClick(object sender, RoutedEventArgs e)
        {
            if (StartDatePicker.SelectedDate is not DateTime startDate ||
                EndDatePicker.SelectedDate is not DateTime endDate)
                return;

            List<ReceiptSummaryModel> receipts;
            try
            {
                receipts = _saleHistoryService.Search(startDate, endDate);
            }
            catch (ArgumentException exception)
            {
                MessageBox.Show(
                    exception.Message,
                    "Ugyldigt datointerval",
                    MessageBoxButton.OK,
                    MessageBoxImage.Warning);
                return;
            }

            _receiptList.Clear();
            foreach (ReceiptSummaryModel receipt in receipts)
            {
                ListReceiptModel receiptModel = new ListReceiptModel
                {
                    Id = receipt.SaleId,
                    Content =
                        $"{receipt.SaleTime:dd-MM-yyyy HH:mm} - Pris: {receipt.Total:0.00}"
                };
                _receiptList.Add(receiptModel);
            }

            _init = true;
            ListReciept.ItemsSource = null;
            ListReciept.ItemsSource = _receiptList;
            _init = false;
        }

        
        public class ListReceiptModel
        {
            public int Id { get; set; }
            public string Content { get; set; }

            public override string ToString()
            {
                return Content;
            }
        }

        private void ListReciept_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (_init || e.AddedItems.Count == 0)
                return;

            ListReceiptModel data = (ListReceiptModel) e.AddedItems[0];
            _saleId = data.Id;
            ReceiptDetailModel receipt =
                _saleHistoryService.GetReceipt(data.Id);
            StringBuilder sb = new StringBuilder();
            foreach (ReceiptLineModel saleLine in receipt.Lines)
            {
                sb.AppendLine(
                    $"{saleLine.Product} - {saleLine.Pieces} stk. a' {saleLine.Price:0.00} = {saleLine.Total:0.00}");
            }

            sb.AppendLine($"Total: {receipt.Total:0.00} kr.");
            PrintReceipt.Visibility = Visibility.Visible;
            SaleLines.Clear();
            SaleLines.Text = sb.ToString();
        }

        private void PrintReceipt_OnClick(object sender, RoutedEventArgs e)
        {
            _saleService.PrintReceipt(_saleId);
        }
    }
}