import XCTest
@testable import NASBackup

@MainActor
final class ConnectViewModelTests: XCTestCase {

    func test_canConnect_isFalse_whenFieldsEmpty() {
        let vm = ConnectViewModel()
        XCTAssertFalse(vm.canConnect)
    }

    func test_canConnect_isTrue_whenAllFieldsFilled() {
        let vm = ConnectViewModel()
        vm.host = "192.168.1.10"
        vm.username = "admin"
        vm.password = "secret"
        XCTAssertTrue(vm.canConnect)
    }

    func test_connectionState_becomesVerified_onSuccess() async {
        let vm = ConnectViewModel()
        vm.host = "192.168.1.10"
        vm.username = "admin"
        vm.password = "secret"

        // Override the service factory so no real network call is made.
        let mock = MockNASService()
        await vm.verifyWith(transfer: mock)

        XCTAssertTrue(vm.isConnected)
        XCTAssertNil(vm.verifyError)
    }

    func test_connectionState_becomesFailed_onError() async {
        let vm = ConnectViewModel()
        vm.host = "192.168.1.10"
        vm.username = "admin"
        vm.password = "wrong"

        let mock = MockNASService()
        mock.shouldFail = true
        await vm.verifyWith(transfer: mock)

        XCTAssertFalse(vm.isConnected)
        XCTAssertNotNil(vm.verifyError)
    }
}