namespace AmiReel.Models;

/// <summary>One page of the Shorts create-wizard. Extra effect pages are inserted only when the style needs them.</summary>
public enum ShortWizardStep
{
    Clip,
    Effect,
    StyleOptions,
    Titles,
    Encode,
}

/// <summary>Builds the Shorts wizard page list for a chosen visual style.</summary>
public static class ShortWizard
{
    public static IReadOnlyList<ShortWizardStep> StepsFor(ShortStyle style)
    {
        List<ShortWizardStep> steps = [ShortWizardStep.Clip, ShortWizardStep.Effect];
        if (NeedsStyleOptions(style))
            steps.Add(ShortWizardStep.StyleOptions);
        steps.Add(ShortWizardStep.Titles);
        steps.Add(ShortWizardStep.Encode);
        return steps;
    }

    public static bool NeedsStyleOptions(ShortStyle style) =>
        style is ShortStyle.Brand or ShortStyle.Video;

    public static string Title(ShortWizardStep step) => step switch
    {
        ShortWizardStep.Clip => "Source clip",
        ShortWizardStep.Effect => "Visual effect",
        ShortWizardStep.StyleOptions => "Effect settings",
        ShortWizardStep.Titles => "Title card",
        ShortWizardStep.Encode => "Encoding",
        _ => "Short",
    };

    public static string Description(ShortStyle style) => style switch
    {
        ShortStyle.Brand => "Title-card background image with a framed source clip.",
        ShortStyle.Pixel => "Pixelated backdrop with neon scan bars.",
        ShortStyle.Mirror => "Reflected source strips above and below the clip.",
        ShortStyle.Crop => "Full-frame vertical crop of the source.",
        ShortStyle.Workbench => "Workbench-style window around the source.",
        ShortStyle.Blur => "Blurred backdrop with a centered source.",
        ShortStyle.Crt => "CRT curvature, scanlines, and a rolling highlight.",
        ShortStyle.Copper => "Amiga copper bars behind the source.",
        ShortStyle.Stars => "Twinkling star field behind a framed clip.",
        ShortStyle.Grid => "Neon grid horizon behind the source.",
        ShortStyle.Tiles => "Four-tile mirrored backdrop.",
        ShortStyle.Scan => "Chunky scanlines and moving bars.",
        ShortStyle.Starfield => "Fast-moving star streaks.",
        ShortStyle.Plasma => "Demoscene plasma backdrop.",
        ShortStyle.Rasterbars => "Classic raster bars above and below the clip.",
        ShortStyle.Vhs => "Tape noise, chroma shift, and scanlines.",
        ShortStyle.Monitor => "CRT monitor bezel around the source.",
        ShortStyle.Split => "Split-band source strips around the main clip.",
        ShortStyle.Spectrum => "Scrolling audio spectrum. The source video must have audio.",
        ShortStyle.Video => "Looping background video with the Amiga clip overlaid.",
        _ => "",
    };
}