namespace PlotLine.Models;

public static class SceneTitleDisplay
{
    public static string Format(int sceneNumber, string? title)
        => Format((decimal)sceneNumber, title);

    public static string Format(decimal sceneNumber, string? title)
    {
        var number = $"Scene {sceneNumber:0.##}";
        var cleanTitle = Clean(title);
        if (string.IsNullOrWhiteSpace(cleanTitle) || IsDefaultSceneTitle(cleanTitle, sceneNumber))
        {
            return number;
        }

        return $"{number} \u00b7 {cleanTitle}";
    }

    public static string? Clean(string? title)
    {
        if (string.IsNullOrWhiteSpace(title))
        {
            return null;
        }

        var clean = string.Join(' ', title.Trim().Split((char[]?)null, StringSplitOptions.RemoveEmptyEntries));
        return string.IsNullOrWhiteSpace(clean) ? null : clean;
    }

    private static bool IsDefaultSceneTitle(string title, decimal sceneNumber)
        => string.Equals(title, $"Scene {sceneNumber:0.##}", StringComparison.OrdinalIgnoreCase)
            || string.Equals(title, $"Scene {sceneNumber:N0}", StringComparison.OrdinalIgnoreCase);
}