import XCTest
@testable import iPX

final class WidgetTests: XCTestCase {
    private var defaults: UserDefaults!

    override func setUp() {
        defaults = UserDefaults(suiteName: "ipx.tests.\(UUID().uuidString)")
        LastPlayed.defaults = defaults
    }

    func testTheWidgetReadsBackWhatTheAppWrote() {
        var s = Snapshot()
        s.unread = 7
        s.title = "An Episode"
        s.position = 450
        s.duration = 1800
        s.playing = true
        s.save(to: defaults)
        XCTAssertEqual(Snapshot.load(from: defaults), s)
        XCTAssertEqual(s.progress, 0.25)
    }

    func testNothingWrittenYetIsAnEmptyWidget() {
        XCTAssertEqual(Snapshot.load(from: defaults), Snapshot())
        XCTAssertNil(Snapshot().progress, "no bar without a length")
    }

    private func item(_ guid: String) -> Playback.Item {
        Playback.Item(url: URL(string: "https://x/media/1")!, enc: 1, feedId: "f", guid: guid,
                      title: "T", feedTitle: "F", artwork: nil, duration: 60)
    }

    func testResumeCarriesOnFromTheLastPlace() {
        LastPlayed.item = item("a")
        LastPlayed.position = 42
        LastPlayed.item = item("a")
        XCTAssertEqual(LastPlayed.position, 42, "loading the same episode again keeps its place")
    }

    func testAnotherEpisodeDoesNotInheritThePlace() {
        LastPlayed.item = item("a")
        LastPlayed.position = 42
        LastPlayed.item = item("b")
        XCTAssertNil(LastPlayed.position)
        XCTAssertEqual(LastPlayed.item?.guid, "b")
    }
}