using Avalonia.Controls;
using Avalonia.Layout;
using Avalonia.Media;
using Nonemm.Session;

namespace Nonemm.App.Windows;

/// What the callsign being typed could be, a column per source. The columns
/// stay apart because they answer different questions, and merged into one list
/// they would all read as equally reliable.
public sealed partial class CheckWindow : RefreshableWindow
{
    private readonly AppSession session;
    private readonly Func<string> typed;

    public CheckWindow(AppSession session, Func<string> typed)
    {
        this.session = session;
        this.typed = typed;
        InitializeComponent();
        Refresh();
    }


    public override void Refresh()
    {
        Columns.Children.Clear();
        if (session.Check is null)
        {
            return;
        }
        int at = 0;
        foreach (CheckColumn column in session.Check.Columns(typed()))
        {
            Control panel = BuildColumn(column);
            Grid.SetColumn(panel, at++);
            Columns.Children.Add(panel);
        }
    }

    private static Control BuildColumn(CheckColumn column)
    {
        StackPanel panel = new() { Margin = new Avalonia.Thickness(0, 0, 8, 0) };
        panel.Children.Add(new TextBlock
        {
            Text = $"{Heading(column.Source)} {Count(column)}",
            FontSize = 11,
            Opacity = 0.7,
            Margin = new Avalonia.Thickness(0, 0, 0, 4),
        });
        foreach (CheckCandidate candidate in column.Candidates)
        {
            panel.Children.Add(new TextBlock
            {
                Text = candidate.Call,
                FontFamily = new FontFamily("monospace"),
                FontSize = 14,
                Foreground = Verdicts.Colour(candidate.Verdict),
                HorizontalAlignment = HorizontalAlignment.Left,
            });
        }
        return new ScrollViewer { Content = panel };
    }

    /// Before anything is typed the heading says how many calls the source
    /// holds; once it is offering candidates it says how many.
    private static string Count(CheckColumn column) =>
        column.Candidates.Count > 0 ? column.Candidates.Count.ToString() : $"({column.Held})";

    private static string Heading(CheckSource source) => source switch
    {
        CheckSource.Log => "Log",
        CheckSource.Database => "Master",
        _ => "Bandmap",
    };
}