import Foundation

struct PageVideoTemplate: Template {

    typealias VideoSource = (url: String, type: VideoType)

    enum Key: String, CaseIterable {
        case options = "OPTIONS"
        case sources = "SOURCES"
    }

    enum VideoOption: String {
        case controls
        case autoplay
        case muted
        case loop
        case playsinline
        case poster
        case preload
    }

    static let templateName = "video.html"

    let raw: String

    let results: GenerationResultsHandler

    func generate<T>(sources: [VideoSource], options: T) -> String where T: Sequence, T.Element == VideoOption {
        let sourcesCode = sources.map(makeSource).joined(separator: "\n")
        let optionCode = options.map { $0.rawValue }.joined(separator: " ")
        return generate([.sources: sourcesCode, .options: optionCode])
    }

    private func makeSource(_ source: VideoSource) -> String {
        """
        <source src="\(source.url)" type="\(source.type.htmlType)">
        """
    }
}