import XCTest
@testable import LChatCore

// Pins the open-group key wire shape shared with the web (shell.js
// createThread / loadThreads): open_key = {k: <thread key, base64url>}
// encrypted under the instance key; the group name decrypts with the carried
// thread key. If either side changes the envelope, this breaks here rather
// than as a silently-undecryptable directory in production.
final class OpenKeyRoundTripTests: XCTestCase {
    func testOpenKeyWireShapeRoundTrips() throws {
        let ik = try GroupKey(rawKey: ECIES.randomAESKey())
        let threadRaw = ECIES.randomAESKey()

        // What createChat(openGroup:) writes…
        let openKey = try ik.encryptJSON(["k": threadRaw.base64urlEncodedString()])

        // …and what the fold / discoverGroups read back.
        let payload = try ik.decryptJSON(OpenKeyPayload.self, blob: openKey)
        XCTAssertEqual(Data(base64urlEncoded: payload.k), threadRaw)

        let key = try GroupKey(rawKey: Data(base64urlEncoded: payload.k)!)
        let nameBlob = try key.encryptJSON(["name": "Fáilte 🏠"])
        XCTAssertEqual(try key.decryptJSON(GroupNamePayload.self, blob: nameBlob).name, "Fáilte 🏠")
    }
}