import Foundation
import AVFoundation
import CoreUtils

public protocol AudioEngineDelegate: AnyObject {
    func audioEngine(_ engine: AudioEngine, didUpdateLevel level: Float)
    func audioEngine(_ engine: AudioEngine, didCaptureAudio data: Data)
    func audioEngineDidStartCapture(_ engine: AudioEngine)
    func audioEngineDidStopCapture(_ engine: AudioEngine)
}

public class AudioEngine: ObservableObject {
    private let logger = Logger(category: "AudioEngine")
    private let audioEngine = AVAudioEngine()

    public weak var delegate: AudioEngineDelegate?

    @Published public private(set) var isCapturing = false
    @Published public private(set) var currentLevel: Float = 0.0

    public init() {
        // Audio engine initialization will be completed in Phase 1
    }

    public func startCapture() throws {
        logger.info("Starting audio capture")
        // TODO: Implement in Phase 1
        isCapturing = true
        delegate?.audioEngineDidStartCapture(self)
    }

    public func stopCapture() {
        logger.info("Stopping audio capture")
        // TODO: Implement in Phase 1
        isCapturing = false
        delegate?.audioEngineDidStopCapture(self)
    }

    private func processAudioBuffer(_ buffer: AVAudioPCMBuffer) {
        // TODO: Implement RMS calculation and audio processing in Phase 1
    }
}