package logger

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

	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/internal/bytebufferpool"
	"github.com/gofiber/fiber/v2/utils"
	"github.com/valyala/fasthttp"
)

// go test -run Test_Logger
func Test_Logger(t *testing.T) {
	app := fiber.New()

	buf := bytebufferpool.Get()
	defer bytebufferpool.Put(buf)

	app.Use(New(Config{
		Format: "${error}",
		Output: buf,
	}))

	app.Get("/", func(c *fiber.Ctx) error {
		return errors.New("some random error")
	})

	resp, err := app.Test(httptest.NewRequest("GET", "/", nil))
	utils.AssertEqual(t, nil, err)
	utils.AssertEqual(t, fiber.StatusInternalServerError, resp.StatusCode)
	utils.AssertEqual(t, "some random error", buf.String())
}

// go test -run Test_Logger_AppendUint
func Test_Logger_AppendUint(t *testing.T) {
	app := fiber.New()

	buf := bytebufferpool.Get()
	defer bytebufferpool.Put(buf)

	app.Use(New(Config{
		Format: "${bytesReceived} ${bytesSent} ${status}",
		Output: buf,
	}))

	app.Get("/", func(c *fiber.Ctx) error {
		return c.SendString("hello")
	})

	resp, err := app.Test(httptest.NewRequest("GET", "/", nil))
	utils.AssertEqual(t, nil, err)
	utils.AssertEqual(t, fiber.StatusOK, resp.StatusCode)
	utils.AssertEqual(t, "0 5 200", buf.String())
}

// go test -v -run=^$ -bench=Benchmark_Logger -benchmem -count=4
func Benchmark_Logger(b *testing.B) {
	app := fiber.New()

	app.Use(New(Config{
		Format: "${bytesReceived} ${bytesSent} ${status}",
		Output: ioutil.Discard,
	}))

	app.Get("/", func(c *fiber.Ctx) error {
		return c.SendString("Hello, World!")
	})

	h := app.Handler()

	fctx := &fasthttp.RequestCtx{}
	fctx.Request.Header.SetMethod("GET")
	fctx.Request.SetRequestURI("/")

	b.ReportAllocs()
	b.ResetTimer()

	for n := 0; n < b.N; n++ {
		h(fctx)
	}

	utils.AssertEqual(b, 200, fctx.Response.Header.StatusCode())
}