import Foundation
import XCTest
@testable import QueueCubeShareCore

final class SharedVideoTests: XCTestCase {
    func testAcceptsHTTPAndHTTPSURLsWithoutChangingTheirContents() throws {
        for value in ["https://video.example/watch?v=one&t=12", "http://video.example/a%20b"] {
            let url = try XCTUnwrap(URL(string: value))
            XCTAssertEqual(try SharedVideo.validate(url), url)
        }
    }

    func testExtractsLinkFromSharedTitleAndText() throws {
        let url = try SharedVideo.extract(from: "A video to watch: https://video.example/watch?v=one\nSent from my phone")
        XCTAssertEqual(url.absoluteString, "https://video.example/watch?v=one")
    }

    func testRepeatedURLInTextAndAttachmentsIsOneLink() throws {
        let url = try XCTUnwrap(URL(string: "https://video.example/watch?v=one"))
        XCTAssertEqual(try SharedVideo.extract(from: "\(url)\nWatch it: \(url)"), url)
        XCTAssertEqual(try SharedVideo.single([url, url]), url)
    }

    func testRejectsMultipleDistinctLinks() throws {
        XCTAssertThrowsError(try SharedVideo.extract(from: "https://video.example/one https://video.example/two")) {
            guard case SharedVideo.Error.multipleLinks = $0 else { return XCTFail("Unexpected error: \($0)") }
        }
        XCTAssertThrowsError(try SharedVideo.single([
            XCTUnwrap(URL(string: "https://video.example/one")),
            XCTUnwrap(URL(string: "https://video.example/two"))
        ]))
    }

    func testRejectsFilesOtherSchemesCredentialsAndMissingHosts() throws {
        for value in [
            "file:///tmp/video.mp4", "ftp://video.example/video.mp4", "javascript:alert(1)",
            "https://user:password@video.example/video", "https://user@video.example/video",
            "https:///video", "/relative/video"
        ] {
            let url = try XCTUnwrap(URL(string: value))
            XCTAssertThrowsError(try SharedVideo.validate(url), "Accepted \(value)") {
                guard case SharedVideo.Error.noLink = $0 else { return XCTFail("Unexpected error: \($0)") }
            }
        }
        XCTAssertThrowsError(try SharedVideo.extract(from: "This title contains no video link"))
        XCTAssertThrowsError(try SharedVideo.single([]))
    }
}