import Foundation

struct IndexPageGenerator {

    private let factory: LocalizedSiteTemplate

    init(factory: LocalizedSiteTemplate) {
        self.factory = factory
    }

    func generate(
        site: Element,
        language: String,
        languageButton: String?,
        sectionItemCount: Int,
        to url: URL) {
            let localized = site.localized(for: language)

            var content = [PageTemplate.Key : String]()
            content[.head] = factory.pageHead.generate(page: site, language: language)
            content[.topBar] = factory.topBar.generate(sectionUrl: nil, languageButton: languageButton)
            content[.contentClass] = "overview"
            content[.header] = makeHeader(page: site, metadata: localized, language: language)
            content[.content] = factory.overviewSection.generate(
                sections: site.sortedItems,
                in: site,
                language: language,
                sectionItemCount: sectionItemCount)
            content[.footer] = site.customFooterContent()
            guard factory.page.generate(content, to: url) else {
                return
            }
            log.add(info: "Generated \(url.lastPathComponent)", source: site.path)
    }

    private func makeHeader(page: Element, metadata: Element.LocalizedMetadata, language: String) -> String {
        let content = factory.makeHeaderContent(page: page, metadata: metadata, language: language)
        return factory.factory.centeredHeader.generate(content)
    }
}