import AVFoundation
import SstCore

/// Records `seconds` of microphone audio; returns nil if access is denied or recording fails.
func recordSamples(seconds: Double, onLevel: ((Float) -> Void)? = nil) async -> [Float]? {
    guard await AVCaptureDevice.requestAccess(for: .audio) else {
        print("Microfoon-toegang geweigerd (Systeeminstellingen → Privacy → Microfoon).")
        return nil
    }
    let recorder = AudioRecorder()
    recorder.onLevel = onLevel
    do { try recorder.start() } catch {
        print("start mislukt:", error.localizedDescription)
        return nil
    }
    print("Neem \(Int(seconds)) s op — praat nu")
    try? await Task.sleep(for: .seconds(seconds))
    return recorder.stop()
}

func runRecordProbe() async {
    final class Levels: @unchecked Sendable {
        let lock = NSLock()
        var values: [Float] = []
        func add(_ v: Float) { lock.withLock { values.append(v) } }
    }
    let levels = Levels()
    guard let samples = await recordSamples(seconds: 3, onLevel: { levels.add($0) }) else { return }
    let peak = samples.map { abs($0) }.max() ?? 0
    print("samples: \(samples.count) (verwacht ≈ 48000), piek: \(peak)")
    let values = levels.lock.withLock { levels.values }
    if let lo = values.min(), let hi = values.max() {
        print(String(format: "niveau-meldingen: %d (≈ %.0f per s), bereik %.1f … %.1f dBFS", values.count, Double(values.count) / 3, lo, hi))
    } else {
        print("geen niveau-meldingen ontvangen")
    }
}