import AppKit

func fail(_ message: String) -> Never {
    FileHandle.standardError.write(Data("\(message)\n".utf8))
    exit(1)
}

guard CommandLine.arguments.count == 2 else {
    fail("Usage: swift Scripts/run.swift <Conjure.app>")
}
let target = URL(fileURLWithPath: CommandLine.arguments[1]).standardizedFileURL.resolvingSymlinksInPath()
let running = NSRunningApplication.runningApplications(withBundleIdentifier: "dev.conjure.launcher")
    .filter { $0.bundleURL?.resolvingSymlinksInPath().path == target.path }
for app in running {
    guard app.terminate() else { fail("Could not quit the existing Conjure instance.") }
}
for _ in 0..<100 {
    if running.allSatisfy(\.isTerminated) { break }
    // AppKit refreshes running-application state on the main run loop.
    RunLoop.main.run(until: Date(timeIntervalSinceNow: 0.05))
}
guard running.allSatisfy(\.isTerminated) else {
    fail("Conjure did not quit; the rebuilt app was not launched. Quit it and try again.")
}

let configuration = NSWorkspace.OpenConfiguration()
configuration.createsNewApplicationInstance = true
NSWorkspace.shared.openApplication(at: target, configuration: configuration) { app, error in
    if let error { fail("Could not launch Conjure: \(error.localizedDescription)") }
    guard let app else { fail("Launch Services did not return a running application.") }
    print("Opened rebuilt Conjure (PID \(app.processIdentifier)).")
    exit(0)
}
RunLoop.main.run()