import XCTest
@testable import iPX

final class CarTests: XCTestCase {
    private func episode(_ json: String) throws -> CarEpisode {
        try JSONDecoder().decode(CarEpisode.self, from: Data(json.utf8))
    }

    func testAnItemReadsAsTheAPISendsIt() throws {
        let e = try episode("""
            {"guid":"g","feed_id":"f","title":null,"link":null,"image":null,"duration":1800,"position":600,
             "read":false,"flagged":false,"enclosures":[
               {"id":7,"feed_id":"f","guid":"g","url":"https://x/v.mp4","mime":"video/mp4","path":"/d/v.mp4","state":"done"},
               {"id":8,"feed_id":"f","guid":"g","url":"https://x/Show%20Ep%201.mp3","mime":"audio/mpeg","path":"/d/e.mp3","state":"done"}]}
            """)
        XCTAssertEqual(e.audio?.id, 8, "a video is passed over for the sound")
        XCTAssertEqual(e.name, "Show Ep 1", "untitled is named by its file")
        XCTAssertEqual(e.left, "20 min left")
    }

    func testNothingToPlayIsNotListed() throws {
        let e = try episode(#"{"guid":"g","feed_id":"f","title":"A post","position":0,"enclosures":[]}"#)
        XCTAssertNil(e.audio)
        XCTAssertNil(e.left, "not started")
        XCTAssertNil(e.item(feedTitle: "F", feedImage: nil, kept: []))
    }

    func testTheFileIsTheOneThePageWouldPlay() {
        let plain = CarEpisode.Enclosure(id: 4, url: "u", mime: nil, deadair: nil, path: "/d/a")
        let trimmed = CarEpisode.Enclosure(id: 5, url: "u", mime: nil, deadair: 90, path: "/d/b")
        XCTAssertEqual(CarEpisode.path(of: plain, kept: []), "/media/4")
        XCTAssertEqual(CarEpisode.path(of: trimmed, kept: []), "/media/5/deadair.m3u8")
        XCTAssertEqual(CarEpisode.path(of: trimmed, kept: ["/media/5/deadair"]), "/media/5/deadair",
                       "the copy on the phone, connection or not")
    }

    /// #443: only what ipx has downloaded, and only sound.
    func testOnlyADownloadedSoundIsPlayable() throws {
        let e = try episode("""
            {"guid":"g","feed_id":"f","title":"T","position":0,"enclosures":[
               {"id":1,"url":"https://x/cover.jpg","mime":"image/jpeg","path":"/d/c.jpg"},
               {"id":2,"url":"https://x/later.mp3","mime":"audio/mpeg","path":null},
               {"id":3,"url":"https://x/now.mp3","mime":null,"path":"/d/n.mp3"}]}
            """)
        XCTAssertEqual(e.audio?.id, 3, "a picture and a file not yet fetched are passed over; no type, an .mp3 name")
        let blog = try episode(#"{"guid":"g","feed_id":"f","title":"T","position":0,"enclosures":[{"id":1,"url":"https://x/a.png","mime":"image/png","path":"/d/a.png"}]}"#)
        XCTAssertNil(blog.audio)
    }
}