import XCTest
@testable import LChatCore

// 🤖 Phase 5 (docs/native-apps.md): the raw material of an app-host
// projection query — AppChatProjection.unprojected decodes exactly the app
// events native has no built-in projection for, and nothing else. The
// query's other half (window.lchatNative.projectEvent) lives in shell.js and
// answers with the app's own chatMessage/groupFeedMessage line.
final class ProjectionQueryTests: XCTestCase {
  private let key = try! GroupKey(rawKey: Data(repeating: 3, count: 32))

  private func blob(_ json: String) -> String {
    try! key.encryptData(Data(json.utf8))
  }

  func testNamespacedEventDecodes() {
    let json = #"{"type":"myhabits.checkin","habit":"run","name":"Ana","uid":"u-ana","ts":1700000000000}"#
    let ev = AppChatProjection.unprojected(blob(json), key: key)
    XCTAssertEqual(ev?.name, "Ana")
    XCTAssertEqual(ev?.uid, "u-ana")
    XCTAssertEqual(ev?.ts, 1_700_000_000_000)
    // The decrypted JSON rides verbatim — the host's projectEvent parses it.
    XCTAssertEqual(ev?.eventJSON, json)
  }

  func testEnvelopeFieldsAreOptional() {
    let ev = AppChatProjection.unprojected(blob(#"{"type":"vault.add"}"#), key: key)
    XCTAssertEqual(ev?.name, "")
    XCTAssertNil(ev?.uid)
    XCTAssertNil(ev?.ts)
  }

  func testChatInternalsStaySilent() {
    // chat.* internals (typing beats, checkpoints) never query.
    XCTAssertNil(AppChatProjection.unprojected(blob(#"{"type":"chat.typing","name":"Ana"}"#), key: key))
  }

  func testUnnamespacedAndMalformedStaySilent() {
    XCTAssertNil(AppChatProjection.unprojected(blob(#"{"type":"chat","text":"hi"}"#), key: key))
    XCTAssertNil(AppChatProjection.unprojected(blob(#"{"type":".oops"}"#), key: key))
    XCTAssertNil(AppChatProjection.unprojected(blob(#"{"text":"no type"}"#), key: key))
    XCTAssertNil(AppChatProjection.unprojected("not-a-blob", key: key))
  }
}