import Foundation
import XCTest
import VelodyDomain
@testable import VelodyPersistence

final class RemoteTrackDownloadStateStoreTests: XCTestCase {
    func testFileDownloadStateStorePersistsAcrossInstances() async throws {
        let fileManager = FileManager.default
        let tempDirectory = fileManager.temporaryDirectory.appendingPathComponent(
            UUID().uuidString,
            isDirectory: true
        )
        let fileURL = tempDirectory.appendingPathComponent("remote-download-states.json")

        defer {
            try? fileManager.removeItem(at: tempDirectory)
        }

        let firstStore = try FileRemoteTrackDownloadStateStore(fileURL: fileURL)
        let states = [
            RemoteTrackDownloadState(
                remoteTrackId: "track-123",
                assetId: "asset-456",
                localFilePath: "/tmp/asset-456.mp3",
                downloadedAt: Date(timeIntervalSince1970: 1_000),
                downloadStatus: .downloaded,
                lastDownloadError: nil
            ),
        ]

        try await firstStore.saveDownloadStates(states)

        let secondStore = try FileRemoteTrackDownloadStateStore(fileURL: fileURL)
        let restoredStates = try await secondStore.loadDownloadStates()

        XCTAssertEqual(restoredStates, states)
    }
}