import Elementary
import Foundation
import Testing

@testable import Infrastructure

@Suite("Page protocol", .tags(.page))
struct PageTests {

    // MARK: Functional tests

    @Test
    func `assembles the document around the page's parts`() {
        let html = StubPage().render()

        #expect(html.contains("<title>Stub Page</title>"))
        #expect(html.contains(#"lang="en""#))
        #expect(html.contains(#"name="viewport""#))
        #expect(html.contains(#"<meta name="stub" content="marker">"#))
        #expect(html.contains(#"<link rel="stylesheet" href="/css/stub.css">"#))
        #expect(html.contains(#"<script src="/js/stub.js"></script>"#))
        #expect(html.contains("Stub content"))
    }

    @Test
    func `places the metadata between the viewport and the stylesheets`() throws {
        let html = StubPage().render()

        let viewport = try #require(html.range(of: #"name="viewport""#))
        let metadata = try #require(html.range(of: #"name="stub""#))
        let stylesheet = try #require(html.range(of: "/css/stub.css"))

        #expect(viewport.lowerBound < metadata.lowerBound)
        #expect(metadata.lowerBound < stylesheet.lowerBound)
    }

    @Test
    func `renders the scripts after the content`() throws {
        let html = StubPage().render()

        let content = try #require(html.range(of: "Stub content"))
        let script = try #require(html.range(of: "/js/stub.js"))

        #expect(content.lowerBound < script.lowerBound)
    }

    @Test
    func `appends the version token to the asset URLs`() {
        let html = StubPage(assetVersion: "0123456789abcdef").render()

        #expect(html.contains("/css/stub.css?v=0123456789abcdef"))
        #expect(html.contains("/js/stub.js?v=0123456789abcdef"))
    }

    @Test
    func `derives the document language from the locale`() {
        let html = StubPage(locale: .init(identifier: "de-DE")).render()

        #expect(html.contains(#"lang="de""#))
    }

}