import Foundation
import Sparkle

private let lastVersionKey = "lastLaunchedVersion"

@MainActor
final class Updater {
    static let shared = Updater()
    private lazy var controller = SPUStandardUpdaterController(startingUpdater: true, updaterDelegate: nil, userDriverDelegate: nil)

    func start() {
        let version = Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion") as? String
        let last = UserDefaults.standard.string(forKey: lastVersionKey)
        UserDefaults.standard.set(version, forKey: lastVersionKey)
        if last != nil && last != version {
            restartServer()
        }
        _ = controller
    }

    func check() {
        controller.checkForUpdates(nil)
    }

    private func restartServer() {
        guard let data = try? Data(contentsOf: agentPlist),
              let plist = try? PropertyListDecoder().decode(LaunchAgent.self, from: data),
              plist.programArguments.first == serverHelper
        else {
            return
        }
        let p = Process()
        p.executableURL = URL(filePath: "/bin/launchctl")
        p.arguments = ["kickstart", "-k", "gui/\(getuid())/run.fc.byre"]
        do {
            try p.run()
            p.waitUntilExit()
            log.info("restarted byre server: status \(p.terminationStatus)")
        } catch {
            log.error("restart byre server: \(errorText(error), privacy: .public)")
        }
    }
}