//
//  WatchConnectivityManager.swift
//  Feels Watch App
//
//  Watch-side connectivity - sends mood to iPhone for centralized logging.
//

import Foundation
import WatchConnectivity
import WidgetKit
import os.log

/// Watch-side connectivity manager
/// Sends mood votes to iPhone for centralized logging
final class WatchConnectivityManager: NSObject, ObservableObject {

    static let shared = WatchConnectivityManager()

    private static let logger = Logger(subsystem: "com.tt.ifeel.watchkitapp", category: "WatchConnectivity")

    private var session: WCSession?

    private override init() {
        super.init()

        if WCSession.isSupported() {
            session = WCSession.default
            session?.delegate = self
            session?.activate()
            Self.logger.info("WCSession activated")
        } else {
            Self.logger.warning("WCSession not supported")
        }
    }

    // MARK: - Watch → iOS

    /// Send mood to iOS app for centralized logging
    func sendMoodToPhone(mood: Int, date: Date) -> Bool {
        guard let session = session,
              session.activationState == .activated else {
            Self.logger.warning("WCSession not ready")
            return false
        }

        let message: [String: Any] = [
            "action": "logMood",
            "mood": mood,
            "date": date.timeIntervalSince1970
        ]

        // Use transferUserInfo for guaranteed delivery
        session.transferUserInfo(message)
        Self.logger.info("Sent mood \(mood) to iPhone")
        return true
    }
}

// MARK: - WCSessionDelegate

extension WatchConnectivityManager: WCSessionDelegate {

    func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {
        if let error = error {
            Self.logger.error("WCSession activation failed: \(error.localizedDescription)")
        } else {
            Self.logger.info("WCSession activated: \(activationState.rawValue)")
        }
    }

    // Receive reload notification from iOS
    func session(_ session: WCSession, didReceiveUserInfo userInfo: [String: Any] = [:]) {
        if userInfo["action"] as? String == "reloadWidgets" {
            Self.logger.info("Received reload notification from iPhone")
            Task { @MainActor in
                WidgetCenter.shared.reloadAllTimelines()
            }
        }
    }

    func session(_ session: WCSession, didReceiveMessage message: [String: Any]) {
        if message["action"] as? String == "reloadWidgets" {
            Task { @MainActor in
                WidgetCenter.shared.reloadAllTimelines()
            }
        }
    }
}