import Foundation
import XCTest
import VelodyDomain
@testable import VelodyPersistence

final class LocalTrackArtworkUploadPayloadBuilderTests: XCTestCase {
    func testBuilderIncludesArtworkPayloadWhenArtworkExists() async throws {
        let store = InMemoryLocalArtworkStore()
        let data = sampleArtworkData()
        let localFilePath = try await store.saveArtwork(
            data,
            sha256: "artwork-sha",
            mimeType: "image/png"
        )
        let builder = LocalTrackArtworkUploadPayloadBuilder(artworkStore: store)

        let payload = try await builder.makePayload(
            for: LocalTrackArtwork(
                localFilePath: localFilePath,
                sha256: "artwork-sha",
                mimeType: "image/png",
                width: 1,
                height: 1
            )
        )

        XCTAssertEqual(payload?.dataBase64, data.base64EncodedString())
        XCTAssertEqual(payload?.sha256, "artwork-sha")
        XCTAssertEqual(payload?.mimeType, "image/png")
        XCTAssertEqual(payload?.width, 1)
        XCTAssertEqual(payload?.height, 1)
    }

    func testBuilderReturnsNilWhenArtworkIsMissing() async throws {
        let builder = LocalTrackArtworkUploadPayloadBuilder(
            artworkStore: InMemoryLocalArtworkStore()
        )

        let payload = try await builder.makePayload(for: nil)

        XCTAssertNil(payload)
    }
}

private func sampleArtworkData() -> Data {
    Data(
        base64Encoded:
            "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQIW2P8z8DwHwAFgwJ/lBi4NwAAAABJRU5ErkJggg=="
    )!
}