using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL.Calibration;
using Tango.BL.Entities;
using Tango.Core.Commands;
using Tango.MachineStudio.Common;
using Tango.MachineStudio.Common.Notifications;
using Tango.SharedUI;

namespace Tango.MachineStudio.RML.ViewModels
{
    public class CalibrationDataViewVM : ViewModel
    {
        private INotificationProvider _notification;

        private ObservableCollection<CalibrationDataVM> _liquidsCalibrationData;
        /// <summary>
        /// Gets or sets the liquids calibration data.
        /// </summary>
        public ObservableCollection<CalibrationDataVM> LiquidsCalibrationData
        {
            get { return _liquidsCalibrationData; }
            set { _liquidsCalibrationData = value; RaisePropertyChangedAuto(); }
        }

        /// <summary>
        /// Gets or sets the import excel command.
        /// </summary>
        public RelayCommand<CalibrationDataVM> ImportExcelCommand { get; set; }

        /// <summary>
        /// Gets or sets the export excel command.
        /// </summary>
        public RelayCommand<CalibrationDataVM> ExportExcelCommand { get; set; }

        /// <summary>
        /// Initializes a new instance of the <see cref="CalibrationDataViewVM"/> class.
        /// </summary>
        public CalibrationDataViewVM(INotificationProvider notificationProvider)
        {
            _notification = notificationProvider;

            LiquidsCalibrationData = new ObservableCollection<CalibrationDataVM>();

            ImportExcelCommand = new RelayCommand<CalibrationDataVM>(ImportExcel);
            ExportExcelCommand = new RelayCommand<CalibrationDataVM>(ExportExcel);
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="CalibrationDataViewVM"/> class.
        /// </summary>
        /// <param name="liquidsCalibrationData">The liquids calibration data.</param>
        public CalibrationDataViewVM(INotificationProvider notificationProvider, ObservableCollection<CalibrationDataVM> liquidsCalibrationData) : this(notificationProvider)
        {
            LiquidsCalibrationData = liquidsCalibrationData;
        }

        private void ImportExcel(CalibrationDataVM vm)
        {
            OpenFileDialog dlg = new OpenFileDialog();

            try
            {
                dlg.Title = $"Import excel calibration file for {vm.LiquidType.Name}";
                dlg.Filter = "Excel Files|*.xlsx";
                if (dlg.ShowDialog().Value)
                {
                    vm.CalibrationPoints.Clear();
                    var points = CalibrationHelper.ImportCalibrationDataFromExcel(dlg.FileName);

                    foreach (var p in points)
                    {
                        vm.CalibrationPoints.Add(new CalibrationDataPointVM(p));
                    }
                }
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, "Error importing excel file " + dlg.FileName);
                _notification.ShowError("An error occurred while trying to import the selected excel file. Please check the file format if valid and is available to read.");
            }
        }

        private void ExportExcel(CalibrationDataVM vm)
        {
            SaveFileDialog dlg = new SaveFileDialog();
            try
            {
                dlg.Title = $"Export excel calibration file for {vm.LiquidType.Name}";
                dlg.Filter = "Excel Files|*.xlsx";
                dlg.DefaultExt = ".xlsx";
                dlg.FileName = $"CData_{vm.LiquidType.Name}_v{vm.LiquidType.Version}.xlsx";
                if (dlg.ShowDialog().Value)
                {
                    var points = vm.CalibrationPoints.Select(x => x.ToPMR()).ToList();
                    CalibrationHelper.ExportCalibrationDataToExcel(points, dlg.FileName);
                }
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, "Error exporting excel file " + dlg.FileName);
                _notification.ShowError("An error occurred while trying to export the calibration data.");
            }
        }

        public void ApplyCalibrationData(LiquidType liquidType, List<CalibrationDataPointVM> newpoints)
        {
            CalibrationDataVM vm = LiquidsCalibrationData.FirstOrDefault(x => x.LiquidType == liquidType);
            if(vm != null)
            {
                newpoints.ForEach(x => vm.CalibrationPoints.Add(x));
            }
        }
    }
}