package middleware

  
  import (
  	"net/http"

  	"time"
  
  	"git.to-net.rs/marko.tikvic/gologger"

  
  	web "git.to-net.rs/marko.tikvic/webutility"

  )

  var httpLogger *gologger.Logger

  func SetAccessControlHeaders(h http.HandlerFunc) http.HandlerFunc {
  	return func(w http.ResponseWriter, req *http.Request) {
  		web.SetAccessControlHeaders(w)
  
  		h(w, req)
  	}
  }

  // IgnoreOptionsRequests ...
  func IgnoreOptionsRequests(h http.HandlerFunc) http.HandlerFunc {

  	return func(w http.ResponseWriter, req *http.Request) {

  		if req.Method == http.MethodOptions {
  			return
  		}

  		h(w, req)
  	}

  }

  // ParseForm ...

  func ParseForm(h http.HandlerFunc) http.HandlerFunc {

  	return func(w http.ResponseWriter, req *http.Request) {

  		err := req.ParseForm()
  		if err != nil {

  			web.BadRequest(w, req, err.Error())

  			return
  		}

  		h(w, req)
  	}

  }

  // ParseMultipartForm ...

  func ParseMultipartForm(h http.HandlerFunc) http.HandlerFunc {
  	return func(w http.ResponseWriter, req *http.Request) {
  		err := req.ParseMultipartForm(32 << 20)
  		if err != nil {

  			web.BadRequest(w, req, err.Error())

  			return
  		}

  		h(w, req)
  	}
  }

  // SetLogger ...
  func SetLogger(logger *gologger.Logger) {
  	httpLogger = logger

  }

  func StartLogging(filename, dir string) (err error) {
  	if httpLogger, err = gologger.New(filename, dir, gologger.MaxLogSize1MB); err != nil {
  		return err
  	}
  	return nil
  }
  
  func CloseLogger() {
  	httpLogger.Close()
  }

  // LogHTTP ...
  func LogHTTP(h http.HandlerFunc) http.HandlerFunc {

  	return func(w http.ResponseWriter, req *http.Request) {

  		if httpLogger == nil {
  			h(w, req)
  			return
  		}

  		t1 := time.Now()

  		claims, _ := web.GetTokenClaims(req)
  		in := httpLogger.LogHTTPRequest(req, claims.Username)

  		rec := web.NewStatusRecorder(w)

  		h(rec, req)

  		t2 := time.Now()
  		out := httpLogger.LogHTTPResponse(rec.Status(), t2.Sub(t1), rec.Size())
  
  		httpLogger.CombineHTTPLogs(in, out)

  	}
  }

  // Auth ...

  func Auth(roles string, h http.HandlerFunc) http.HandlerFunc {

  	return func(w http.ResponseWriter, req *http.Request) {

  		if _, err := web.AuthCheck(req, roles); err != nil {
  			web.Unauthorized(w, req, err.Error())

  			return
  		}

  		h(w, req)
  	}

  }