//using System.Collections.ObjectModel;
//using System.Windows;
//using CommunityToolkit.Mvvm.ComponentModel;
//using CommunityToolkit.Mvvm.Input;
//using MySqlConnector;
//using UtopiaCanteenSystem.Models;
//using UtopiaCanteenSystem.Services;

//namespace UtopiaCanteenSystem.ViewModels;

///// <summary>
///// Admin CRUD for meal schedules in production (hrms.meal_schedule). No SQLite. Load all on open; optional Site filter (local).
///// </summary>
//public partial class MealSchedulesViewModel : ObservableObject
//{
//    private readonly IMealScheduleService _mealScheduleService;
//    private readonly INavigationService _navigation;

//    [ObservableProperty]
//    private ObservableCollection<MealSchedule> _schedules = new();

//    /// <summary>Full list from production; Schedules is filtered by SelectedSiteFilter.</summary>
//    private List<MealSchedule> _allSchedules = new();

//    [ObservableProperty]
//    private ObservableCollection<string> _siteFilterChoices = new() { "All" };

//    [ObservableProperty]
//    private string _selectedSiteFilter = "All";

//    [ObservableProperty]
//    private MealSchedule? _selectedSchedule;

//    [ObservableProperty]
//    private string _locationSiteId = string.Empty;

//    [ObservableProperty]
//    private string _mealName = string.Empty;

//    [ObservableProperty]
//    private string _startTime = "06:00:00";

//    [ObservableProperty]
//    private string _endTime = "09:00:00";

//    [ObservableProperty]
//    private string _message = string.Empty;

//    [ObservableProperty]
//    private bool _isError;

//    [ObservableProperty]
//    private bool _isLoading;

//    public MealSchedulesViewModel(IMealScheduleService mealScheduleService, INavigationService navigation)
//    {
//        _mealScheduleService = mealScheduleService;
//        _navigation = navigation;
//        _ = LoadSchedulesAsync();
//    }

//    partial void OnSelectedSiteFilterChanged(string value)
//    {
//        ApplyFilter();
//    }

//    partial void OnSelectedScheduleChanged(MealSchedule? value)
//    {
//        if (value == null) return;
//        LocationSiteId = value.LocationSiteId ?? string.Empty;
//        MealName = value.MealName ?? string.Empty;
//        StartTime = value.StartTime ?? "00:00:00";
//        EndTime = value.EndTime ?? "23:59:59";
//    }

//    private void ApplyFilter()
//    {
//        if (string.IsNullOrEmpty(SelectedSiteFilter) || SelectedSiteFilter == "All")
//        {
//            Schedules = new ObservableCollection<MealSchedule>(_allSchedules);
//            return;
//        }
//        var filtered = _allSchedules.Where(s => string.Equals(s.LocationSiteId?.Trim(), SelectedSiteFilter.Trim(), StringComparison.OrdinalIgnoreCase)).ToList();
//        Schedules = new ObservableCollection<MealSchedule>(filtered);
//    }

//    private async Task LoadSchedulesAsync()
//    {
//        IsLoading = true;
//        Message = string.Empty;
//        IsError = false;
//        try
//        {
//            var list = await _mealScheduleService.GetAllSchedulesAsync().ConfigureAwait(true);
//            _allSchedules = list.ToList();
//            var siteIds = _allSchedules.Select(s => s.LocationSiteId?.Trim() ?? "").Where(s => !string.IsNullOrEmpty(s)).Distinct().OrderBy(s => s, StringComparer.Ordinal).ToList();
//            SiteFilterChoices = new ObservableCollection<string>(new[] { "All" }.Concat(siteIds));
//            SelectedSiteFilter = "All";
//            ApplyFilter();
//            if (_allSchedules.Count == 0)
//                Message = "No schedules in production. Add one below (HRMS MySQL must be configured).";
//        }
//        catch (Exception ex)
//        {
//            IsError = true;
//            var msg = ex is MySqlException mysql
//                ? $"{mysql.Message}{Environment.NewLine}{Environment.NewLine}{mysql.StackTrace}"
//                : $"{ex.Message}{Environment.NewLine}{Environment.NewLine}{ex.StackTrace}";
//            Message = "Could not load schedules from production.";
//            MessageBox.Show(msg, "Meal Schedules – Load Error", MessageBoxButton.OK, MessageBoxImage.Error);
//        }
//        finally
//        {
//            IsLoading = false;
//        }
//    }

//    [RelayCommand]
//    private void AddNew()
//    {
//        SelectedSchedule = null;
//        LocationSiteId = "02";
//        MealName = string.Empty;
//        StartTime = "06:00:00";
//        EndTime = "09:00:00";
//        Message = string.Empty;
//    }

//    [RelayCommand]
//    private async Task Save()
//    {
//        Message = string.Empty;
//        IsError = false;

//        if (!TimeSpan.TryParse(StartTime?.Trim(), out var start) || !TimeSpan.TryParse(EndTime?.Trim(), out var end))
//        {
//            Message = "Start time and end time must be in HH:mm:ss format.";
//            IsError = true;
//            return;
//        }
//        if (start >= end)
//        {
//            Message = "Start time must be before end time.";
//            IsError = true;
//            return;
//        }

//        var siteId = (LocationSiteId ?? string.Empty).Trim();
//        if (string.IsNullOrEmpty(siteId))
//        {
//            Message = "Location site ID is required.";
//            IsError = true;
//            return;
//        }

//        try
//        {
//            if (SelectedSchedule != null)
//            {
//                var dto = new MealSchedule
//                {
//                    Id = SelectedSchedule.Id,
//                    MealName = (MealName ?? string.Empty).Trim(),
//                    LocationSiteId = siteId,
//                    StartTime = StartTime.Trim(),
//                    EndTime = EndTime.Trim()
//                };
//                await _mealScheduleService.UpdateAsync(dto).ConfigureAwait(true);
//                Message = "Schedule updated in production.";
//            }
//            else
//            {
//                var dto = new MealSchedule
//                {
//                    MealName = (MealName ?? string.Empty).Trim(),
//                    LocationSiteId = siteId,
//                    StartTime = StartTime.Trim(),
//                    EndTime = EndTime.Trim()
//                };
//                await _mealScheduleService.CreateAsync(dto).ConfigureAwait(true);
//                Message = "Schedule added to production.";
//            }
//            await LoadSchedulesAsync().ConfigureAwait(true);
//        }
//        catch (Exception ex)
//        {
//            IsError = true;
//            var msg = ex is MySqlException mysql
//                ? $"{mysql.Message}{Environment.NewLine}{Environment.NewLine}{mysql.StackTrace}"
//                : $"{ex.Message}{Environment.NewLine}{Environment.NewLine}{ex.StackTrace}";
//            Message = "Failed to save to production.";
//            MessageBox.Show(msg, "Meal Schedules – Save Error", MessageBoxButton.OK, MessageBoxImage.Error);
//        }
//    }

//    /// <summary>Selects a schedule for editing (used by Actions column Edit button).</summary>
//    [RelayCommand]
//    private void SelectSchedule(MealSchedule? schedule)
//    {
//        SelectedSchedule = schedule;
//    }

//    [RelayCommand]
//    private async Task Delete(MealSchedule? row)
//    {
//        var toDelete = row ?? SelectedSchedule;
//        if (toDelete == null)
//        {
//            Message = "Select a schedule to delete.";
//            IsError = true;
//            return;
//        }
//        Message = string.Empty;
//        IsError = false;
//        try
//        {
//            await _mealScheduleService.DeleteAsync(toDelete.Id).ConfigureAwait(true);
//            Message = "Schedule deleted from production.";
//            SelectedSchedule = null;
//            await LoadSchedulesAsync().ConfigureAwait(true);
//        }
//        catch (Exception ex)
//        {
//            IsError = true;
//            var msg = ex is MySqlException mysql
//                ? $"{mysql.Message}{Environment.NewLine}{Environment.NewLine}{mysql.StackTrace}"
//                : $"{ex.Message}{Environment.NewLine}{Environment.NewLine}{ex.StackTrace}";
//            Message = "Failed to delete.";
//            MessageBox.Show(msg, "Meal Schedules – Delete Error", MessageBoxButton.OK, MessageBoxImage.Error);
//        }
//    }

//    [RelayCommand]
//    private void Back()
//    {
//        _navigation.NavigateToSettings();
//    }
//}



using System.Collections.ObjectModel;
using System.Windows;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using MySqlConnector;
using UtopiaCanteenSystem.Models;
using UtopiaCanteenSystem.Services;

namespace UtopiaCanteenSystem.ViewModels;

/// <summary>
/// View-only display of meal schedules from production.
/// Loads all schedules on open; optional Site filter.
/// </summary>
public partial class MealSchedulesViewModel : ObservableObject
{
    private readonly IMealScheduleService _mealScheduleService;
    private readonly INavigationService _navigation;
    private readonly IConfigService _configService;
    private readonly string _currentSiteId;

    [ObservableProperty]
    private ObservableCollection<MealSchedule> _schedules = new();

    private List<MealSchedule> _allSchedules = new();

    [ObservableProperty]
    private ObservableCollection<string> _siteFilterChoices = new() { "All" };

    [ObservableProperty]
    private string _selectedSiteFilter = "All";

    [ObservableProperty]
    private MealSchedule? _selectedSchedule;

    [ObservableProperty]
    private string _message = string.Empty;

    [ObservableProperty]
    private bool _isError;

    [ObservableProperty]
    private bool _isLoading;

    public MealSchedulesViewModel(IMealScheduleService mealScheduleService, INavigationService navigation, IConfigService configService)
    {
        _mealScheduleService = mealScheduleService;
        _navigation = navigation;
        _configService = configService;
        _currentSiteId = (_configService.GetSiteId() ?? string.Empty).Trim();
        _ = LoadSchedulesAsync();
    }

    partial void OnSelectedSiteFilterChanged(string value)
    {
        ApplyFilter();
    }

    private void ApplyFilter()
    {
        var site = string.IsNullOrWhiteSpace(_currentSiteId) ? "01" : _currentSiteId;
        var filtered = _allSchedules
            .Where(s => string.Equals(s.LocationSiteId?.Trim(), site, StringComparison.OrdinalIgnoreCase))
            .ToList();
        Schedules = new ObservableCollection<MealSchedule>(filtered);
    }

    private async Task LoadSchedulesAsync()
    {
        IsLoading = true;
        Message = string.Empty;
        IsError = false;

        try
        {
            var list = await _mealScheduleService.GetAllSchedulesAsync().ConfigureAwait(true);
            _allSchedules = list.ToList();

            var siteIds = _allSchedules
                .Select(s => s.LocationSiteId?.Trim() ?? "")
                .Where(s => !string.IsNullOrEmpty(s))
                .Distinct()
                .OrderBy(s => s, StringComparer.Ordinal)
                .ToList();

            // Only show schedules for current configured site; hide other sites from filter choices.
            SiteFilterChoices = new ObservableCollection<string>(new[] { string.IsNullOrWhiteSpace(_currentSiteId) ? "01" : _currentSiteId });
            SelectedSiteFilter = SiteFilterChoices.First();
            ApplyFilter();

            if (_allSchedules.Count == 0)
                Message = "No schedules configured.";
        }
        catch (Exception ex)
        {
            IsError = true;

            var msg = ex is MySqlException mysql
                ? $"{mysql.Message}{Environment.NewLine}{Environment.NewLine}{mysql.StackTrace}"
                : $"{ex.Message}{Environment.NewLine}{Environment.NewLine}{ex.StackTrace}";

            Message = "Could not load schedules.";
            MessageBox.Show(msg, "Meal Schedules – Load Error", MessageBoxButton.OK, MessageBoxImage.Error);
        }
        finally
        {
            IsLoading = false;
        }
    }

    [RelayCommand]
    private void Back()
    {
        _navigation.NavigateToSettings();
    }
}