package servcli

import (
	"encoding/base64"
	"net/http"
)

// BasicAuthMiddleware
func NewBasicAuthMiddleware(user, pass string) MiddlewareFunc {
	return func(next http.RoundTripper) http.RoundTripper {
		return newBasicAuthMW(next, user, pass)
	}
}

type BasicAuthMW struct {
	user, pass string
	next       http.RoundTripper
}

func newBasicAuthMW(next http.RoundTripper, user, pass string) *BasicAuthMW {
	return &BasicAuthMW{
		user: user,
		pass: pass,
		next: next,
	}
}

func (tran BasicAuthMW) RoundTrip(req *http.Request) (*http.Response, error) {
	if tran.user != "" && tran.pass != "" {
		pair := base64.StdEncoding.EncodeToString([]byte(tran.user + ":" + tran.pass))
		req.Header.Set("Authorization", "Basic "+pair)
	}
	return tran.next.RoundTrip(req)
}

// BearerAuthMiddleware
func NewBearerAuthMiddleware(token string) MiddlewareFunc {
	return func(next http.RoundTripper) http.RoundTripper {
		return newBearerAuthMW(next, token)
	}
}

type BearerAuthMW struct {
	token string
	next  http.RoundTripper
}

func newBearerAuthMW(next http.RoundTripper, token string) *BearerAuthMW {
	return &BearerAuthMW{
		token: token,
		next:  next,
	}
}

func (tran BearerAuthMW) RoundTrip(req *http.Request) (*http.Response, error) {
	req.Header.Set("Authorization", "Bearer "+tran.token)
	return tran.next.RoundTrip(req)
}