import Foundation

final class TemplateFactory {

    let templateFolder: URL

    // MARK: Site Elements

    let backNavigation: BackNavigationTemplate

    let pageHead: PageHeadTemplate

    let topBar: TopBarTemplate

    let overviewSection: OverviewSectionTemplate

    let overviewSectionClean: OverviewSectionCleanTemplate

    let pageLink: PageLinkTemplate

    let box: BoxTemplate

    // MARK: Thumbnails

    let largeThumbnail: LargeThumbnailTemplate

    let squareThumbnail: SquareThumbnailTemplate

    let smallThumbnail: SmallThumbnailTemplate

    func thumbnail(style: ThumbnailStyle) -> ThumbnailTemplate {
        switch style {
        case .large:
            return largeThumbnail
        case .square:
            return squareThumbnail
        case .small:
            return smallThumbnail
        }
    }

    // MARK: Headers

    let leftHeader: LeftHeaderTemplate

    let centeredHeader: CenteredHeaderTemplate

    // MARK: Pages

    let page: PageTemplate

    let image: PageImageTemplate

    let largeImage: EnlargeableImageTemplate

    let video: PageVideoTemplate

    // MARK: Slideshow

    let slideshows: SlideshowsTemplate

    let slideshow: SlideshowTemplate

    let slideshowImage: SlideshowImageTemplate

    // MARK: HTML

    let html: HTMLElementsGenerator

    // MARK: Init

    init(templateFolder: URL, results: GenerationResultsHandler) throws {
        self.templateFolder = templateFolder
        func create<T>() throws -> T where T: Template {
            try .init(in: templateFolder, results: results)
        }
        self.backNavigation = try create()
        self.pageHead = try create()
        self.topBar = try create()
        self.overviewSection = try create()
        self.overviewSectionClean = try create()
        self.box = try create()
        self.pageLink = try create()
        self.largeThumbnail = try create()
        self.squareThumbnail = try create()
        self.smallThumbnail = try create()
        self.leftHeader = try create()
        self.centeredHeader = try create()
        self.page = try create()
        self.image = try create()
        self.largeImage = try create()
        self.video = try create()
        self.slideshow = try create()
        self.slideshows = try create()
        self.slideshowImage = try create()
        self.html = .init()
    }

    // MARK: Convenience methods

    func makePlaceholder(title: String, text: String) -> String {
        box.generate([
            .title: title,
            .text: text])
    }
}