import XCTest
@testable import AIStudyApp

final class RuntimeRecoveryServiceTests: XCTestCase {

    // MARK: - Recovery does not crash

    func test_recovery_run_with_noop_adapter_does_not_crash() {
        let adapter = NoopReadingRuntimeAdapter()
        // Must not crash even with a noop adapter
        RuntimeRecoveryService.run(adapter: adapter)
        // If we reach here, test passes
        XCTAssertTrue(true)
    }

    func test_recovery_run_calls_reloadStaleEvents() {
        let adapter = NoopReadingRuntimeAdapter()
        // Noop returns 0, but the call should succeed
        let reloaded = adapter.reloadStaleEvents()
        XCTAssertEqual(reloaded, 0, "Noop adapter should return 0 from reloadStaleEvents")
    }

    func test_recovery_cleanup_sessions_returns_zero_for_noop() {
        let adapter = NoopReadingRuntimeAdapter()
        let nowMs = Int64(Date().timeIntervalSince1970 * 1000)
        let cleaned = adapter.cleanupStaleSessions(nowMs: nowMs, maxAgeMs: 86_400_000)
        XCTAssertEqual(cleaned, 0)
    }

    // MARK: - Stale session max age

    func test_stale_session_max_age_is_24_hours() {
        // 24 * 60 * 60 * 1000 = 86_400_000 ms
        // This is the internal constant; verify via behavior
        let adapter = NoopReadingRuntimeAdapter()
        let nowMs = Int64(Date().timeIntervalSince1970 * 1000)

        // Call with various max ages — none should crash
        let r1 = adapter.cleanupStaleSessions(nowMs: nowMs, maxAgeMs: 0)
        let r2 = adapter.cleanupStaleSessions(nowMs: nowMs, maxAgeMs: 86_400_000)
        let r3 = adapter.cleanupStaleSessions(nowMs: nowMs, maxAgeMs: 1_000_000_000)

        XCTAssertEqual(r1, 0)
        XCTAssertEqual(r2, 0)
        XCTAssertEqual(r3, 0)
    }
}