/// <summary>
///     Search/find panel with text input, match navigation, and mode toggles.
/// </summary>
public sealed partial class MokaJsonSearchOverlay : ComponentBase
{
#region Parameters
    /// <summary>The current search query.</summary>
    [Parameter]
    public string? Query { get; set; }

    /// <summary>Total number of matches found.</summary>
    [Parameter]
    public int MatchCount { get; set; }

    /// <summary>Zero-based index of the active match.</summary>
    [Parameter]
    public int ActiveMatchIndex { get; set; }

    /// <summary>Whether case-sensitive search is active.</summary>
    [Parameter]
    public bool CaseSensitive { get; set; }

    /// <summary>Whether regex mode is active.</summary>
    [Parameter]
    public bool UseRegex { get; set; }

    /// <summary>Callback when the query text changes.</summary>
    [Parameter]
    public EventCallback<string> OnQueryChanged { get; set; }

    /// <summary>Callback to navigate to the next match.</summary>
    [Parameter]
    public EventCallback OnNext { get; set; }

    /// <summary>Callback to navigate to the previous match.</summary>
    [Parameter]
    public EventCallback OnPrevious { get; set; }

    /// <summary>Callback to close the search overlay.</summary>
    [Parameter]
    public EventCallback OnClose { get; set; }

    /// <summary>Callback when case sensitivity is toggled.</summary>
    [Parameter]
    public EventCallback<bool> OnCaseSensitiveChanged { get; set; }

    /// <summary>Callback when regex mode is toggled.</summary>
    [Parameter]
    public EventCallback<bool> OnRegexChanged { get; set; }
    private string InputId { get; } = $"moka-search-{Guid.NewGuid():N}";

#endregion
#region Event Handlers
    private async Task HandleInput(ChangeEventArgs e) => await OnQueryChanged.InvokeAsync(e.Value?.ToString() ?? "");
    private async Task HandleKeyDown(KeyboardEventArgs e)
    {
        switch (e.Key)
        {
            case "Enter" when e.ShiftKey:
            case "F3" when e.ShiftKey:
                await OnPrevious.InvokeAsync();
                break;
            case "Enter":
            case "F3":
                await OnNext.InvokeAsync();
                break;
            case "Escape":
                await OnClose.InvokeAsync();
                break;
        }
    }

    private async Task HandleCaseSensitiveChange(ChangeEventArgs e) => await OnCaseSensitiveChanged.InvokeAsync(bool.TryParse(e.Value?.ToString(), out bool v) && v);
    private async Task HandleRegexChange(ChangeEventArgs e) => await OnRegexChanged.InvokeAsync(bool.TryParse(e.Value?.ToString(), out bool v) && v);
#endregion
}