enum HeaderFile: Int {

    case codeHightlighting = 4

    case modelViewer = 3

    /// CSS File to style the audio player
    case audioPlayerCss = 1

    /// JavaScript file for the audio player
    case audioPlayerJs = 2

    func header(content: Content) -> HeaderElement? {
        switch self {
        case .codeHightlighting:
            if let file = content.settings.pages.codeHighlightingJsFile {
                return HeaderElement.js(file: file, defer: true)
            }
        case .modelViewer:
            if let file = content.settings.pages.modelViewerJsFile {
                return HeaderElement.jsModule(file)
            }
        case .audioPlayerCss:
            if let file = content.settings.pages.audioPlayerCssFile {
                return .css(file)
            }
        case .audioPlayerJs:
            if let file = content.settings.pages.audioPlayerJsFile {
                return .js(file: file, defer: true)
            }
        }
        return nil
    }
}

extension HeaderFile: Comparable {

    static func < (lhs: HeaderFile, rhs: HeaderFile) -> Bool {
        lhs.rawValue < rhs.rawValue
    }


}

typealias RequiredHeaders = Set<HeaderFile>