using System;
using System.Diagnostics;
using System.Windows;
using Correlator.DataService;
using Correlator.Model;
using Correlator.Util;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Services.Dialogs;

namespace Correlator.ViewModels
{
    public class EditSoundSampleRateDialogViewModel : BindableBase, IDialogAware
    {
        public event Action<IDialogResult> RequestClose;

        #region VM

        public string Title { get; set; }

        private string _workMode;

        public string WorkMode
        {
            get => _workMode;
            set
            {
                _workMode = value;
                RaisePropertyChanged();
            }
        }

        private string _sampleRate;

        public string SampleRate
        {
            get => _sampleRate;
            set
            {
                _sampleRate = value;
                RaisePropertyChanged();
            }
        }

        #endregion

        #region DelegateCommand

        public DelegateCommand CancelCommand { get; set; }
        public DelegateCommand DetermineParamCommand { get; set; }

        #endregion

        private readonly IApplicationDataService _dataService;
        private SampleRateModel _selectedModel;

        public EditSoundSampleRateDialogViewModel(IApplicationDataService dataService)
        {
            _dataService = dataService;

            CancelCommand = new DelegateCommand(DismissDialog);
            DetermineParamCommand = new DelegateCommand(DetermineParam);
        }

        private void DismissDialog()
        {
            RequestClose?.Invoke(new DialogResult(ButtonResult.Cancel));
        }

        private void DetermineParam()
        {
            Debug.Assert(_selectedModel != null, nameof(_selectedModel) + " != null");
            if (!_sampleRate.IsNumber())
            {
                MessageBox.Show("请输入数字", "温馨提示", MessageBoxButton.OK, MessageBoxImage.Stop);
                return;
            }

            Debug.Assert(_sampleRate != null, nameof(_sampleRate) + " != null");
            _dataService.UpdateSampleRate(_selectedModel.WorkMode, int.Parse(_sampleRate));
            RequestClose?.Invoke(new DialogResult(ButtonResult.OK));
        }

        public bool CanCloseDialog()
        {
            return true;
        }

        public void OnDialogClosed()
        {
        }

        public void OnDialogOpened(IDialogParameters parameters)
        {
            _selectedModel = parameters.GetValue<SampleRateModel>("SelectedSampleRateModel");
            WorkMode = _selectedModel.WorkMode == 1 ? "加速度计" : "水听器";
            SampleRate = _selectedModel.SampleRate.ToString();
            Title = $"编辑采样率 - {WorkMode}";
        }
    }
}