import XCTest
@testable import LChatCore

// 🤖 The two keyboard message verbs' targets (issue #392): ⌘R replies to the
// latest message, ⌘T reacts to the latest one that ISN'T yours. Web twin:
// chat.js's `latest(othersOnly)` behind its cmd/ctrl-R and -T handlers.
final class LatestMessageHotkeyTests: XCTestCase {
  typealias Message = ChatFeedModel.Message

  private func message(_ id: Int64, _ text: String, mine: Bool,
                       action: Bool = false, pending: Bool = false) -> Message {
    var m = Message(id: id, name: mine ? "Me" : "Alice", text: text, mine: mine,
                    at: 1_700_000_000 + id, action: action, edited: false)
    m.pending = pending
    return m
  }

  func testReplyTargetsTheNewestMessageEvenWhenItsYours() {
    let list = [
      message(1, "Morning", mine: false),
      message(2, "Morning!", mine: true),
    ]
    // The issue's wording: "even if it's from you".
    XCTAssertEqual(ChatFeedModel.latestReplyTarget(in: list)?.id, 2)
  }

  func testReplySkipsActionLinesAndOptimisticCopies() {
    let list = [
      message(1, "Real message", mine: false),
      message(2, "added the To-do app", mine: true, action: true),
      message(3, "not acknowledged yet", mine: true, pending: true),
    ]
    // An action line has no bubble to quote, and a pending copy's id is a
    // synthetic one the server has never seen.
    XCTAssertEqual(ChatFeedModel.latestReplyTarget(in: list)?.id, 1)
  }

  func testReplyTargetIsNilWithNothingToReplyTo() {
    XCTAssertNil(ChatFeedModel.latestReplyTarget(in: []))
    XCTAssertNil(ChatFeedModel.latestReplyTarget(in: [
      message(1, "set the group photo", mine: false, action: true),
    ]))
  }

  func testReactionTargetsTheNewestMessageThatIsntYours() {
    let list = [
      message(1, "Morning", mine: false),
      message(2, "Standup in five", mine: false),
      message(3, "On my way", mine: true),
    ]
    XCTAssertEqual(ChatFeedModel.latestReactionTarget(in: list)?.id, 2)
  }

  func testReactionTargetIsNilWhenEveryMessageIsYours() {
    let list = [
      message(1, "Anyone about?", mine: true),
      message(2, "Never mind", mine: true),
    ]
    XCTAssertNil(ChatFeedModel.latestReactionTarget(in: list))
  }
}