using CommunityToolkit.Mvvm.ComponentModel;
using FieldLogger.Models;
using FieldLogger.Services;
using FieldLogger.Services.Data;

namespace FieldLogger.ViewModels;

[QueryProperty(nameof(JobId), "jobId")]
public sealed partial class MapViewModel : ObservableObject
{
    private readonly AppDatabase _database;
    private readonly SettingsService _settings;

    /// <summary>Job to display; 0 means "use the active job".</summary>
    [ObservableProperty]
    private int _jobId;

    [ObservableProperty]
    private string _jobName = "Active job map";

    [ObservableProperty]
    private string _statusText = "Loading locally saved points…";

    public SettingsService Settings => _settings;

    public MapViewModel(AppDatabase database, SettingsService settings)
    {
        _database = database;
        _settings = settings;
    }

    /// <summary>Loads the points to plot (only points with a valid GNSS position).</summary>
    public async Task<List<LoggedPoint>> LoadPointsAsync()
    {
        var jobId = JobId > 0 ? JobId : _settings.ActiveJobId;
        if (jobId is null)
        {
            JobName = "No active job";
            StatusText = "No job selected. Create or activate a job to see its points.";
            return new List<LoggedPoint>();
        }

        var job = await _database.GetJobAsync(jobId.Value);
        JobName = job?.Name ?? "";

        var all = await _database.GetPointsAsync(jobId.Value);
        var plottable = all.Where(p => p.GpsValid).ToList();
        StatusText = plottable.Count == all.Count
            ? $"{JobName}: {all.Count} points"
            : $"{JobName}: {plottable.Count} of {all.Count} points have GPS positions";
        return plottable;
    }
}