using System.IO;
using System.Windows;
using Hardcodet.Wpf.TaskbarNotification;
using JournalBot.Shared;
using Microsoft.Extensions.Configuration;

namespace JournalBot.Tray;

public partial class App : Application
{
    private TaskbarIcon? _tray;
    private MainWindow? _window;
    private BotRunner _runner = null!;
    private RuntimeReader _reader = null!;

    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);

        var config = new ConfigurationBuilder()
            .SetBasePath(AppContext.BaseDirectory)
            .AddJsonFile("appsettings.json", optional: false)
            .Build();

        var py = config["JournalBot:PythonExe"]!;
        var workingDir = config["JournalBot:WorkingDir"]!;
        var runtimePath = config["JournalBot:RuntimePath"]!;
        _runner = new BotRunner(py, workingDir);
        _reader = new RuntimeReader(runtimePath);

        _window = new MainWindow(_runner, _reader);

        _tray = new TaskbarIcon { ToolTipText = "JournalBot" };
        try
        {
            // icon.ico is embedded as a WPF Resource (see .csproj), so load it
            // from the resource stream — not the filesystem, which would fail
            // because no icon.ico is copied next to the EXE.
            var uri = new Uri("pack://application:,,,/icon.ico", UriKind.Absolute);
            using var stream = Application.GetResourceStream(uri).Stream;
            _tray.Icon = new System.Drawing.Icon(stream);
        }
        catch (Exception ex)
        {
            // Missing/corrupt icon must not prevent startup; tray still works.
            // Don't swallow silently — a blank tray icon is otherwise a mystery.
            System.Diagnostics.Debug.WriteLine($"Tray icon load failed: {ex}");
        }
        _tray.TrayLeftMouseUp += (_, _) => ToggleWindow();
        _tray.ContextMenu = BuildMenu();
    }

    private System.Windows.Controls.ContextMenu BuildMenu()
    {
        var menu = new System.Windows.Controls.ContextMenu();
        void Add(string header, Action onClick)
        {
            var mi = new System.Windows.Controls.MenuItem { Header = header };
            mi.Click += (_, _) => onClick();
            menu.Items.Add(mi);
        }
        Add("Ingest", () => _window!.TriggerCommand("ingest"));
        Add("Process", () => _window!.TriggerCommand("process"));
        Add("Both", () => _window!.TriggerCommand("both"));
        menu.Items.Add(new System.Windows.Controls.Separator());
        Add("Fenster öffnen", ShowWindow);
        Add("Beenden", () => Shutdown());
        return menu;
    }

    private void ToggleWindow()
    {
        if (_window!.IsVisible) _window.Hide();
        else ShowWindow();
    }

    private void ShowWindow()
    {
        _window!.Show();
        _window.Activate();
    }

    protected override void OnExit(ExitEventArgs e)
    {
        _tray?.Dispose();
        base.OnExit(e);
    }
}