import XCTest
@testable import iPodderX

/// The client against a real daemon, because the shapes it decodes are the server's and a
/// hand-written fixture would only prove the fixture matches itself.
///
/// Point it at the daemon the browser suite uses, in ipodderx-rs:
///
///   node -e "require('./tests/ui/global-setup').prepare()"
///   node tests/ui/fixtures/serve.js &
///   IPX_CONFIG=$ROOT/config/config.toml IPX_DATA_DIR=$ROOT/data ./target/debug/ipx daemon &
///   TEST_RUNNER_IPX_SERVER=http://127.0.0.1:8791 TEST_RUNNER_IPX_TOKEN=<fixture token> \
///     xcodebuild test ...
final class APITests: XCTestCase {
    var api: API!

    override func setUpWithError() throws {
        let env = ProcessInfo.processInfo.environment
        let server = env["IPX_SERVER"] ?? ""
        let token = env["IPX_TOKEN"] ?? ""
        try XCTSkipIf(server.isEmpty, "set IPX_SERVER to a fixture daemon")

        ServerSettings.base = try XCTUnwrap(ServerSettings.parse(server))

        // The shared token signs in as the admin. It goes in as a cookie rather than on the
        // query because that is how the client authenticates everything -- ipx reads
        // HTTPCookieStorage through the same path the web view fills.
        if !token.isEmpty, let url = ServerSettings.base {
            let cookie = try XCTUnwrap(HTTPCookie(properties: [
                .name: "ipx_token", .value: token, .path: "/",
                .domain: url.host ?? "127.0.0.1",
            ]))
            HTTPCookieStorage.shared.setCookie(cookie)
        }
        api = API()
    }

    func testSignedIn() async throws {
        let me = try await api.me()
        XCTAssertFalse(me.name.isEmpty, "nobody is signed in")
    }

    func testFeedsDecode() async throws {
        let feeds = try await api.feeds()
        XCTAssertFalse(feeds.isEmpty, "the fixture daemon has five feeds configured")
        let show = try XCTUnwrap(feeds.first { $0.id == "test-show" }, "no test-show feed")
        XCTAssertEqual(show.name, "Test Show")
        XCTAssertEqual(show.entries, 2)
        XCTAssertGreaterThanOrEqual(show.subscribers, 1)
    }

    func testEntriesPageAndDecodeEnclosures() async throws {
        let page = try await api.entries(feed: "test-show")
        XCTAssertEqual(page.total, 2)
        let second = try XCTUnwrap(page.entries.first { $0.guid == "ui-2" })
        XCTAssertEqual(second.feedId, "test-show")
        // The cap is one download per scan, newest first, so the second episode has the file.
        let file = try XCTUnwrap(second.playable, "the downloaded episode has no playable file")
        XCTAssertTrue(file.isDownloaded)
        XCTAssertEqual(file.mime, "audio/mpeg")
        XCTAssertFalse(file.isVideo)
    }

    /// An image enclosure is on disk and is not a thing to hand a player.
    func testAnImageIsNotPlayable() async throws {
        let page = try await api.entries(feed: "picture-blog")
        let enclosure = try XCTUnwrap(page.entries.first?.enclosures.first)
        XCTAssertTrue(enclosure.isDownloaded)
        XCTAssertFalse(enclosure.isPlayable, "a downloaded JPEG is not something to play")
    }

    /// Note that the daemon is shared and keeps what earlier tests did to it: the event test
    /// asks it to scan, which downloads another episode. So this asks what the filter means
    /// rather than how many things happen to match it today.
    func testFilterAndSortAreTheServersWork() async throws {
        let all = try await api.entries(feed: "test-show", filter: .all)
        let downloaded = try await api.entries(feed: "test-show", filter: .downloaded)
        XCTAssertLessThanOrEqual(downloaded.total, all.total)
        XCTAssertTrue(downloaded.entries.allSatisfy { $0.enclosures.contains(where: \.isDownloaded) },
                      "the downloaded filter returned an item with no file")

        let asc = try await api.entries(feed: "test-show", sort: .title, direction: .asc)
        let desc = try await api.entries(feed: "test-show", sort: .title, direction: .desc)
        XCTAssertEqual(asc.entries.map(\.guid), desc.entries.map(\.guid).reversed())
    }

    func testSearchMatchesTitles() async throws {
        let hit = try await api.entries(feed: "test-show", search: "Second")
        XCTAssertEqual(hit.entries.count, 1)
        let miss = try await api.entries(feed: "test-show", search: "nothing matches this")
        XCTAssertEqual(miss.total, 0)
    }

    /// Read is per-person state, so writing it and reading it back is the whole contract.
    func testReadRoundTrips() async throws {
        let before = try await api.entries(feed: "test-show", filter: .all)
        let entry = try XCTUnwrap(before.entries.first { $0.guid == "ui-1" })

        try await api.setRead(!entry.read, feed: entry.feedId, guid: entry.guid)
        let after = try await api.entries(feed: "test-show")
        let again = try XCTUnwrap(after.entries.first { $0.guid == "ui-1" })
        XCTAssertEqual(again.read, !entry.read, "the flag did not stick")

        try await api.setRead(entry.read, feed: entry.feedId, guid: entry.guid)
    }

    func testPositionRoundTrips() async throws {
        try await api.setPosition(secs: 42, duration: 900, feed: "test-show", guid: "ui-2")
        let page = try await api.entries(feed: "test-show")
        XCTAssertEqual(page.entries.first { $0.guid == "ui-2" }?.position, 42)
        try await api.setPosition(secs: 0, duration: nil, feed: "test-show", guid: "ui-2")
    }

    /// A 401 has to be legible: it means the session went, and only a sign-in fixes it.
    func testAnUnauthenticatedCallSaysSoPlainly() async throws {
        HTTPCookieStorage.shared.removeCookies(since: .distantPast)
        do {
            _ = try await api.feeds()
            XCTFail("a signed-out request should not succeed")
        } catch API.Failure.notSignedIn {
            // what we want
        } catch {
            XCTFail("expected notSignedIn, got \(error)")
        }
    }
}