using System.Text.Json.Serialization;
using System.Windows.Media;
using CommunityToolkit.Mvvm.ComponentModel;

namespace CursorLang.Models;

/// <summary>
/// The application settings. Every change applies on the fly: the popup and the
/// settings window are bound to these properties, and <c>SettingsService</c> saves
/// them to disk.
/// </summary>
public sealed partial class AppSettings : ObservableObject
{
    /// <summary>The interface language as a culture code: "ru", "en".</summary>
    [ObservableProperty]
    private string _language = "en";

    /// <summary>The look of the settings window.</summary>
    [ObservableProperty]
    private AppTheme _theme = AppTheme.System;

    /// <summary>Where the popup is shown: at the cursor, at the caret or at a fixed point.</summary>
    [ObservableProperty]
    private PopupPlacementMode _placementMode = PopupPlacementMode.AtCursor;

    // The side and the offset are stored per mode: the cursor and the caret call for
    // different settings, and switching the mode does not reset them

    /// <summary>The side of the cursor the popup is put on.</summary>
    [ObservableProperty]
    private AnchorSide _cursorSide = AnchorSide.BottomRight;

    /// <summary>The offset from the cursor in WPF units.</summary>
    [ObservableProperty]
    private double _cursorOffset = 16;

    /// <summary>The side of the caret the popup is put on.</summary>
    [ObservableProperty]
    private AnchorSide _caretSide = AnchorSide.BottomRight;

    /// <summary>The offset from the caret in WPF units.</summary>
    [ObservableProperty]
    private double _caretOffset = 16;

    /// <summary>
    /// The place on the monitor for the <see cref="PopupPlacementMode.FixedPoint"/> mode.
    /// </summary>
    [ObservableProperty]
    private ScreenPosition _screenPosition = ScreenPosition.BottomRight;

    /// <summary>The offset from the monitor edge in WPF units.</summary>
    [ObservableProperty]
    private double _screenMargin = 24;

    /// <summary>The size of the layout name in the popup, in WPF units.</summary>
    [ObservableProperty]
    private double _fontSize = 20;

    /// <summary>The popup opacity: 1.0 is fully opaque.</summary>
    [ObservableProperty]
    private double _opacity = 0.9;

    /// <summary>How long the popup stays on screen, in milliseconds.</summary>
    [ObservableProperty]
    private double _durationMilliseconds = 500;

    /// <summary>
    /// Intercept Caps Lock and switch the layout with it instead of changing the case.
    /// Off by default: the application must not change the behaviour of the system
    /// until it is asked to.
    /// </summary>
    [ObservableProperty]
    private bool _useCapsLockHotkey;

    /// <summary>
    /// After how long a Caps Lock hold cancels the switch, in milliseconds.
    /// </summary>
    [ObservableProperty]
    private double _capsLockHoldMilliseconds = 300;

    /// <summary>
    /// Ask the repository about new versions on startup. A check can always be
    /// started by hand — this setting turns off only the automatic one.
    /// </summary>
    [ObservableProperty]
    private bool _checkForUpdates = true;

    /// <summary>
    /// When the application last asked about new versions successfully.
    /// Stored so as not to go to the network on every startup.
    /// </summary>
    [ObservableProperty]
    private DateTimeOffset? _lastUpdateCheck;

    /// <summary>The fill of the popup. The opacity is set by <see cref="Opacity"/>.</summary>
    [ObservableProperty]
    private Color _backgroundColor = Color.FromRgb(0x20, 0x20, 0x20);

    /// <summary>The colour of the layout name in the popup.</summary>
    [ObservableProperty]
    private Color _foregroundColor = Color.FromRgb(0xFF, 0xFF, 0xFF);

    /// <summary><see cref="DurationMilliseconds"/> as a <see cref="TimeSpan"/>.</summary>
    [JsonIgnore]
    public TimeSpan Duration => TimeSpan.FromMilliseconds(DurationMilliseconds);

    /// <summary><see cref="CapsLockHoldMilliseconds"/> as a <see cref="TimeSpan"/>.</summary>
    [JsonIgnore]
    public TimeSpan CapsLockHoldDelay => TimeSpan.FromMilliseconds(CapsLockHoldMilliseconds);
}