import io.http.fast4s.app.Fast4s.*
import io.http.fast4s.types.HttpMethod.*
import io.http.fast4s.types.{Request, Response}

object AppServer:

    app.get("/") {
      case req => Response.ok("hello, world!")
    }
    
    app.get("/user") {
      case (req: Request) => 
        Response.ok(s"hello, ${req.query.str("name").getOrElse("anonymous")}!")
    }
    
    app.get("/err") {
      case req => throw Exception("err")
    }
    
    app.recover {
      case (req, err) => Response.ok("recovered!")
    }
    
    app.intercept(404) {
      case (req, resp) => Response.ok("404")
    }
    
    app.enter(Get, "/.*") {
      case req =>
        println(s"ns enter ${req.target}")
        req
    }
    
    app.leave(Get, "/.*") {
      case (req, resp) =>
        println(s"ns leave ${req.target}")
        resp
    }
    
    def serve =
      app.serve()

@main def main(args: String*): Int =
  AppServer.serve