import Flutter
import UIKit
import XCTest


@testable import nexo_messaging

// Unit tests for the iOS portion of the nexo messaging plugin bridge.
//
// These cover the minimum iOS method contract and stream handler. They are
// deterministic and credential-free; APNs registration, Firebase token
// refresh, notification center delegate, ACK, dismiss, and inline reply remain
// future smoke/implementation work.
//
// See https://developer.apple.com/documentation/xctest for more information about using XCTest.

class RunnerTests: XCTestCase {

  private let deviceTokenKey = "nexo.messaging.deviceToken"

  override func tearDown() {
    UserDefaults.standard.removeObject(forKey: deviceTokenKey)
    super.tearDown()
  }

  func testGetPlatformVersion() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "getPlatformVersion", arguments: [])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertEqual(result as! String, "iOS " + UIDevice.current.systemVersion)
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

  func testDebugSendNativeEventForwardsPayloadToEventSink() {
    let plugin = NexoMessagingPlugin()
    var forwarded: Any?

    _ = plugin.onListen(withArguments: nil, eventSink: { event in
      forwarded = event
    })

    let call = FlutterMethodCall(methodName: "debugSendNativeEvent", arguments: [
      "type": "opened",
      "channel_id": "channel-ios",
    ])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertNil(result)
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)

    XCTAssertEqual((forwarded as? [String: Any])?["channel_id"] as? String, "channel-ios")
  }

  func testDebugSendNativeEventWithNullPayloadReturnsInvalidArg() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "debugSendNativeEvent", arguments: nil)

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertEqual((result as? FlutterError)?.code, "INVALID_ARG")
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

  func testSaveAndGetDeviceToken() {
    let plugin = NexoMessagingPlugin()

    let saveCall = FlutterMethodCall(methodName: "saveDeviceToken", arguments: [
      "token": "apple_rn-v2:smoke-token",
    ])
    let saveExpectation = expectation(description: "save result block must be called.")
    plugin.handle(saveCall) { result in
      XCTAssertNil(result)
      saveExpectation.fulfill()
    }

    let getCall = FlutterMethodCall(methodName: "getDeviceToken", arguments: nil)
    let getExpectation = expectation(description: "get result block must be called.")
    plugin.handle(getCall) { result in
      XCTAssertEqual(result as? String, "apple_rn-v2:smoke-token")
      getExpectation.fulfill()
    }

    waitForExpectations(timeout: 1)
  }

  func testSaveDeviceTokenWithNullTokenReturnsInvalidArg() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "saveDeviceToken", arguments: [:])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertEqual((result as? FlutterError)?.code, "INVALID_ARG")
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

  func testSetAuthTokenSuccessNoOp() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "setAuthToken", arguments: [
      "serverUrl": "https://smoke.example",
      "token": "auth-token",
    ])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertNil(result)
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

  func testSetAuthTokenMissingArgReturnsInvalidArg() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "setAuthToken", arguments: [
      "serverUrl": "https://smoke.example",
    ])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertEqual((result as? FlutterError)?.code, "INVALID_ARG")
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

  func testSetSigningKeySuccessNoOp() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "setSigningKey", arguments: [
      "serverUrl": "https://smoke.example",
      "signingKey": "signing-key",
    ])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertNil(result)
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

  func testSetSigningKeyMissingArgReturnsInvalidArg() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "setSigningKey", arguments: [
      "serverUrl": "https://smoke.example",
    ])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertEqual((result as? FlutterError)?.code, "INVALID_ARG")
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

  func testClearAuthTokenSuccessNoOp() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "clearAuthToken", arguments: [
      "serverUrl": "https://smoke.example",
    ])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertNil(result)
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

  func testClearAuthTokenMissingArgReturnsInvalidArg() {
    let plugin = NexoMessagingPlugin()

    let call = FlutterMethodCall(methodName: "clearAuthToken", arguments: [:])

    let resultExpectation = expectation(description: "result block must be called.")
    plugin.handle(call) { result in
      XCTAssertEqual((result as? FlutterError)?.code, "INVALID_ARG")
      resultExpectation.fulfill()
    }
    waitForExpectations(timeout: 1)
  }

}