package timeout

import (
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestTimeoutPass(t *testing.T) {
	timeout := Middleware(
		SetTimeout(time.Second * 1),
	)

	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		time.Sleep(time.Millisecond * 100)

		_, err := w.Write([]byte("resp"))
		require.NoError(t, err)
	})

	server := httptest.NewServer(timeout(handler))
	defer server.Close()

	res, err := http.Get(server.URL)
	assert.NoError(t, err)
	defer res.Body.Close()
	assert.Equal(t, http.StatusOK, res.StatusCode)

	b, err := ioutil.ReadAll(res.Body)
	assert.NoError(t, err)
	assert.Equal(t, "resp", string(b))
}

func TestTimeoutTimedOut(t *testing.T) {
	timeout := Middleware(
		SetTimeout(time.Millisecond * 300),
	)

	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		select {
		case <-r.Context().Done():
			return

		case <-time.After(time.Second * 1):
			_, err := w.Write([]byte("resp"))
			require.NoError(t, err)
		}
	})

	server := httptest.NewServer(timeout(handler))
	defer server.Close()

	res, err := http.Get(server.URL)
	assert.NoError(t, err)
	defer res.Body.Close()
	assert.Equal(t, http.StatusGatewayTimeout, res.StatusCode)
}