import AppKit
import ArgumentParser
import Foundation

extension phbar {
	struct start: ParsableCommand {
		static let configuration = CommandConfiguration(
			commandName: "start",
			abstract: "Start the status bar."
		)

		@Flag(name: .long, help: "Display visual guides to help align elements.")
		var debug: Bool = false

		mutating func run() throws {
			let config = try PHConfig.load()

			// NOTE: Make sure NSApp.run() runs in the main thread
			dispatchPrecondition(condition: .onQueue(.main))

			try MainActor.assumeIsolated {
				guard !NSScreen.screens.isEmpty else { throw CleanExit.message("No monitor found") }

				let delegate = PHBarDelegate(config: config, debug: debug)
				let app = NSApplication.shared
				app.setActivationPolicy(.accessory)
				app.delegate = delegate
				app.run()

				throw ExitCode.success
			}
		}
	}
}