using Avalonia.Controls;
using Avalonia.Input;
using Avalonia.Layout;
using Avalonia.Media;
using Avalonia.Threading;
using Nonemm.Core;
using Nonemm.Session;

namespace Nonemm.App.Windows;

/// What is left to work, a column per band: the multipliers at the top of each
/// column, then the stations that are only points. Clicking one puts the radio
/// there with the call in the entry window, the same as clicking a spot on the
/// bandmap.
public sealed partial class AvailableWindow : RefreshableWindow
{
    private readonly AppSession session;
    private readonly Action<Frequency, string> tune;

    public AvailableWindow(AppSession session, Action<Frequency, string> tune)
    {
        this.session = session;
        this.tune = tune;
        InitializeComponent();
        MultsOnlyBox.IsCheckedChanged += (_, _) => Refresh();
        session.Bandmap.Changed += (_, _) => Dispatcher.UIThread.Post(Refresh);
        Refresh();
    }

    public override void Refresh()
    {
        Columns.Children.Clear();
        Columns.ColumnDefinitions.Clear();
        if (session.Available is null)
        {
            StatusText.Text = "no contest is open";
            return;
        }

        session.Bandmap.DropOlderThan(DateTime.UtcNow);
        bool multsOnly = MultsOnlyBox.IsChecked == true;
        List<AvailableStation> stations = session.Available.All()
            .Where(s => !multsOnly || s.IsMultiplier)
            .ToList();
        List<Band> bands = stations
            .Select(s => s.Band)
            .Distinct()
            .OrderBy(b => b.Low.Hertz)
            .ToList();

        int at = 0;
        foreach (Band band in bands)
        {
            Columns.ColumnDefinitions.Add(new ColumnDefinition(GridLength.Star));
            Control column = BuildColumn(band, stations.Where(s => s.Band == band).ToList());
            Grid.SetColumn(column, at++);
            Columns.Children.Add(column);
        }

        int mults = stations.Count(s => s.IsMultiplier);
        StatusText.Text = stations.Count == 0
            ? "nothing spotted that is not worked"
            : $"{stations.Count} to work · {mults} multipliers";
    }

    private Control BuildColumn(Band band, IReadOnlyList<AvailableStation> stations)
    {
        StackPanel panel = new() { Margin = new Avalonia.Thickness(0, 0, 8, 0) };
        panel.Children.Add(new TextBlock
        {
            Text = $"{band.Name} {stations.Count}",
            FontSize = 11,
            Opacity = 0.7,
            Margin = new Avalonia.Thickness(0, 0, 0, 4),
        });
        foreach (AvailableStation station in stations)
        {
            panel.Children.Add(Row(station));
        }
        return panel;
    }

    private Control Row(AvailableStation station)
    {
        TextBlock text = new()
        {
            Text = Label(station),
            FontFamily = new FontFamily("monospace"),
            FontSize = 13,
            Foreground = Verdicts.Colour(station.Verdict),
            HorizontalAlignment = HorizontalAlignment.Left,
            Cursor = new Cursor(StandardCursorType.Hand),
        };
        ToolTip.SetTip(text, Tip(station));
        text.PointerPressed += (_, _) => tune(station.Spot.Frequency, station.Spot.Call.Text);
        return text;
    }

    private static string Label(AvailableStation station)
    {
        string call = $"{station.Spot.Frequency.Kilohertz,9:0.0} {station.Spot.Call.Text}";
        return station.IsMultiplier ? $"{call} · {station.MultiplierText}" : call;
    }

    private static string Tip(AvailableStation station)
    {
        string who = station.Spot.Spotter.Length > 0 ? $" de {station.Spot.Spotter}" : "";
        return $"{Verdicts.Describe(station.Verdict)}{who}";
    }
}