using System.Collections.ObjectModel;

using Microsoft.Extensions.Logging;

using CommunityToolkit.Mvvm.ComponentModel;

using Avalonia;

using LiveChartsCore;
using LiveChartsCore.SkiaSharpView;

namespace GSS2.UI.Core.ViewModels;

public partial class ResourceChartViewModel : ViewModelBase
{
    private readonly ILogger<ResourceChartViewModel> _logger;
    [ObservableProperty] private ObservableCollection<ISeries> _series;
    [ObservableProperty] private ObservableCollection<Axis> _yAxes;
    [ObservableProperty] private ObservableCollection<Axis> _xAxes;
    [ObservableProperty] private Rect _bounds;

    public ResourceChartViewModel(ILogger<ResourceChartViewModel> logger, IEnumerable<ISeries> series, IEnumerable<Axis> yAxes, IEnumerable<Axis> xAxes)
    {
        _logger = logger;
        _logger.LogInformation("Initialization");

        Series = new ObservableCollection<ISeries>(series);
        YAxes = new ObservableCollection<Axis>(yAxes);
        XAxes = new ObservableCollection<Axis>(xAxes);

        _logger.LogInformation("Initialized");
    }

    partial void OnBoundsChanged(Rect value)
    {
        var textSize = value.Height switch
        {
            < 100 => 8,
            < 150 => 10,
            < 200 => 12,
            _ => 14
        };
        var labelsDensity = value.Height switch
        {
            < 100 => 0.2f,
            < 150 => 0.3f,
            < 200 => 0.4f,
            _ => 0.5f
        };
        foreach (var axis in YAxes)
        {
            axis.TextSize = textSize;
            axis.NameTextSize = textSize;
            axis.LabelsDensity = labelsDensity;
        }
    }

    public void AppendValue(double value, int maxValuesCount)
    {
        if (Series.Count() != 1 || Series.First().Values is not ObservableCollection<double> values)
            return;

        values.Add(value);
        while (values.Count() > maxValuesCount || values.Count() == 0)
            values.RemoveAt(0);
    }
}