import Hummingbird
import Logging

public struct AppConfiguration {

  public let hostname: String
  public let port: Int
  public let logLevel: Logger.Level?

  public init(hostname: String, port: Int, logLevel: Logger.Level? = nil) {
    self.hostname = hostname
    self.port = port
    self.logLevel = logLevel
  }
}

///  Build application
/// - Parameter arguments: application arguments
public func buildApplication(_ arguments: AppConfiguration) async throws -> some ApplicationProtocol {
  let environment = Environment()

  let logger = {
    var logger = Logger(label: "Todos")
    logger.logLevel = arguments.logLevel ??
      environment.get("LOG_LEVEL").map { Logger.Level(rawValue: $0) ?? .info } ??
      .info

    return logger
  }()

  let router = Router()

  // Add middleware

  router.addMiddleware {
    // logging middleware
    LogRequestsMiddleware(.info)
  }

  // Add health endpoint

  router.get("/health") { _, _ -> HTTPResponse.Status in
    return .ok
  }

  // let router = buildRouter()
  //
  let app = Application(
    router: router,

    configuration: .init(
      address: .hostname(arguments.hostname, port: arguments.port),
      serverName: "Todos"
    ),
    logger: logger
  )

  return app
}

/// Build router

// func buildRouter() -> Router<AppRequestContext> {
//   let router = Router()
//
//   // Add middleware
//
//   router.addMiddleware {
//     // logging middleware
//     LogRequestsMiddleware(.info)
//   }
//
//   // Add health endpoint
//
//   router.get("/health") { _, _ -> HTTPResponse.Status in
//     return .ok
//   }
//
//   return router
// }