import Foundation

protocol RocketChatAppRouting {
	func route(to route: Route)
}

final class RocketChatAppRouter: ObservableObject, RocketChatAppRouting {
	@Storage(.currentServer) private var currentServer: URL?
	
	@Published var route: Route = .serverList {
		didSet {
			switch route {
				case .roomList(let server):
					currentServer = server.url
				case .serverList:
					break
			}
		}
	}
	
	private let database: ServersDatabase
	
	init(database: ServersDatabase) {
		self.database = database
		loadRoute()
	}
	
	private func loadRoute() {
		if let currentServer, let server = database.server(url: currentServer) {
			route = .roomList(server)
		} else if database.servers().count == 1, let server = database.servers().first {
			route = .roomList(server)
		} else {
			route = .serverList
		}
	}
	
	func route(to route: Route) {
		DispatchQueue.main.async {
			self.route = route
		}
	}
}

enum Route {
	case roomList(Server)
	case serverList
}