import XCTest

@testable import CallsKit

/// Spec §15.20's two optional members on the roster, as the native core
/// forwards them: absent is none, and a report without them decodes
/// exactly as §15.19's did.
final class PeerMediaHearingTests: XCTestCase {
  private func media(_ json: String) throws -> PeerMedia? {
    let state = try JSONDecoder().decode(
      RoomState.self,
      from: Data(
        #"{"phase":"admitted","peer":"me","boot":"b","waiting":[],"peers":[{"peer":"tony","name":"Tony","kind":"member","gen":1,"media":\#(json)}]}"#
          .utf8))
    return Call.peerMedia("tony", in: state)
  }

  func testTheTwoKeyReportStillDecodes() throws {
    let m = try XCTUnwrap(media(#"{"muted":false,"cameraOff":true}"#))
    XCTAssertEqual(m, PeerMedia(muted: false, cameraOff: true))
    XCTAssertNil(m.audioBlocked)
    XCTAssertNil(m.noSoundFrom)
  }

  func testTheReceivingHalfDecodes() throws {
    let m = try XCTUnwrap(
      media(#"{"muted":false,"cameraOff":false,"audioBlocked":true,"noSoundFrom":["me","bea"]}"#))
    XCTAssertEqual(m.audioBlocked, true)
    XCTAssertEqual(m.noSoundFrom, ["me", "bea"])
    XCTAssertEqual(
      m, PeerMedia(muted: false, cameraOff: false, audioBlocked: true, noSoundFrom: ["me", "bea"]))
  }

  func testEitherMemberAlone() throws {
    XCTAssertEqual(try media(#"{"muted":true,"cameraOff":false,"audioBlocked":true}"#)?.noSoundFrom, nil)
    XCTAssertEqual(try media(#"{"muted":true,"cameraOff":false,"noSoundFrom":["me"]}"#)?.audioBlocked, nil)
  }

  func testAMalformedMemberIsRefusedNotGuessed() {
    XCTAssertThrowsError(try media(#"{"muted":false,"cameraOff":false,"noSoundFrom":"me"}"#))
    XCTAssertThrowsError(try media(#"{"muted":false,"cameraOff":false,"audioBlocked":"yes"}"#))
  }
}