using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using System;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Threading;
using TabletTester2025.Models;
using TabletTester2025.Services;

namespace TabletTester2025.ViewModels
{
    public partial class MainViewModel : ObservableObject
    {
        private readonly IPlcService _plc;
        private readonly DatabaseService _db;
        private readonly ExcelExportService _excel;
        private readonly AlarmService _alarm;
        private readonly PlcConfiguration _plcConfig;
        private DispatcherTimer _timer;
        private bool _isConnecting;
        private bool _isUpdatingRealtime;



        [ObservableProperty] private string _plcStatus = "断开";
        [ObservableProperty] private string _currentTime;
        [ObservableProperty] private string _globalAlarm;

        public StationViewModel Tester { get; }

        public IAsyncRelayCommand ExportAllCommand { get; }

        public IAsyncRelayCommand OpenSettingsCommand { get; }
        public IAsyncRelayCommand OpenHistoryCommand { get; }
        public IAsyncRelayCommand OpenCalibrationCommand { get; }

        public MainViewModel(IPlcService plc, DatabaseService db, ExcelExportService excel, AlarmService alarm, PlcConfiguration plcConfig)
        {
            _plc = plc;
            _db = db;
            _excel = excel;
            _alarm = alarm;
            _plcConfig = plcConfig;

            _alarm.PropertyChanged += (s, e) => { if (e.PropertyName == nameof(AlarmService.CurrentAlarm)) GlobalAlarm = _alarm.CurrentAlarm; };

            Tester = new StationViewModel(1, _plc, _plcConfig, _db, _excel, _alarm);

            ExportAllCommand = new AsyncRelayCommand(ExportAllAsync);

            _timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(1) };
            _timer.Tick += OnTimerTick;
            _ = ConnectToPlc();
            _timer.Start();




            OpenSettingsCommand = new AsyncRelayCommand(() =>
            {
                var window = new SettingsWindow();
                window.Owner = Application.Current.MainWindow;
                if (window.ShowDialog() == true)
                    Tester.ApplyPharmaDefaults();
                return Task.CompletedTask;
            });
            OpenHistoryCommand = new AsyncRelayCommand(() => { new HistoryWindow(_db).ShowDialog(); return Task.CompletedTask; });
        }

        private async Task ConnectToPlc()
        {
            if (_isConnecting)
                return;

            try
            {
                _isConnecting = true;
                PlcStatus = "连接中";
                await _plc.ConnectAsync();
                PlcStatus = await _plc.CheckConnectionAsync() ? "已连接" : "连接失败";
            }
            catch
            {
                PlcStatus = "连接失败";
            }
            finally
            {
                _isConnecting = false;
            }
        }

        private async void OnTimerTick(object sender, EventArgs e)
        {
            CurrentTime = DateTime.Now.ToString("HH:mm:ss");

            if (!_plc.IsConnected)
            {
                await ConnectToPlc();
                return;
            }

            if (!await _plc.CheckConnectionAsync())
            {
                PlcStatus = "连接失败";
                return;
            }

            PlcStatus = "已连接";
            if (_isUpdatingRealtime)
                return;

            try
            {
                _isUpdatingRealtime = true;
                await Tester.UpdateRealTimeData();
            }
            catch
            {
                PlcStatus = "连接失败";
            }
            finally
            {
                _isUpdatingRealtime = false;
            }
        }

        private async Task ExportAllAsync()
        {
            var batches = _db.GetBatches(null, 1000);
            string path = System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), $"片剂四用仪检测报告_{DateTime.Now:yyyyMMddHHmmss}.xlsx");
            _excel.ExportToExcel(batches, path);
            System.Windows.MessageBox.Show($"报告已导出到：{path}");
        }
    }
}