import XCTest

@testable import CallsKit

/// Spec §15.19 on the native side: the core puts each peer's reported
/// media on the roster snapshot, and the tiles read it through Call. What
/// is held here is the part that can be wrong without a call running —
/// the wire shape, and unknown never reading as muted or off.
final class PeerMediaTests: XCTestCase {
  private func state(_ json: String) throws -> RoomState {
    try JSONDecoder().decode(RoomState.self, from: Data(json.utf8))
  }

  func testARosterCarriesReportedMediaAndLeavesTheRestUnknown() throws {
    let s = try state(
      #"""
      {"phase":"admitted","peer":"me","boot":"b","waiting":[],"peers":[
        {"peer":"me","name":"Me","kind":"member","media":{"muted":false,"cameraOff":false}},
        {"peer":"bea","name":"Bea","kind":"member","gen":1,"media":{"muted":true,"cameraOff":true}},
        {"peer":"old","name":"Old","kind":"guest","gen":1}
      ]}
      """#)
    XCTAssertEqual(Call.peerMedia("bea", in: s), PeerMedia(muted: true, cameraOff: true))
    // A client from before §15.19 never reports: the snapshot says
    // nothing, and nothing is guessed.
    XCTAssertNil(Call.peerMedia("old", in: s))
    XCTAssertNil(Call.peerMedia("nobody", in: s))
    XCTAssertNil(Call.peerMedia("bea", in: nil))
  }

  func testAMalformedReportDoesNotCostTheWholeState() throws {
    // The core only ever forwards two booleans, but a snapshot the app
    // cannot decode is a call that stops updating, so the shape is pinned.
    XCTAssertThrowsError(
      try state(
        #"{"phase":"admitted","peer":"me","boot":"b","waiting":[],"peers":[{"peer":"x","name":"X","kind":"member","media":{"muted":"yes","cameraOff":false}}]}"#
      ))
  }

  @MainActor func testUnknownIsNeitherMutedNorOff() {
    let call = Call(playAudio: false)
    XCTAssertFalse(call.isMuted("anyone"))
    XCTAssertFalse(call.isCameraOff("anyone"))
    XCTAssertNil(call.peerMedia("anyone"))
  }

  func testTheTileSaysMutedInWordsForVoiceOver() {
    XCTAssertEqual(tileAccessibilityLabel("Bea", muted: true), "Bea, muted")
    XCTAssertEqual(tileAccessibilityLabel("Bea", muted: false), "Bea")
  }
}