// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

package depth_test

import (
	"net/http"
	"testing"

	"github.com/philippta/flyscrape"
	"github.com/philippta/flyscrape/modules/depth"
	"github.com/philippta/flyscrape/modules/followlinks"
	"github.com/philippta/flyscrape/modules/starturl"
	"github.com/stretchr/testify/require"
)

func TestDepth(t *testing.T) {
	scraper := flyscrape.NewScraper()
	scraper.LoadModule(&starturl.Module{URL: "http://www.example.com"})
	scraper.LoadModule(&followlinks.Module{})
	scraper.LoadModule(&depth.Module{Depth: 2})

	scraper.SetTransport(func(r *http.Request) (*http.Response, error) {
		switch r.URL.String() {
		case "http://www.example.com":
			return flyscrape.MockResponse(200, `<a href="http://www.google.com">Google</a>`)
		case "http://www.google.com":
			return flyscrape.MockResponse(200, `<a href="http://www.duckduckgo.com">DuckDuckGo</a>`)
		case "http://www.duckduckgo.com":
			return flyscrape.MockResponse(200, `<a href="http://www.example.com">Example</a>`)
		}
		return flyscrape.MockResponse(200, "")
	})

	var urls []string
	scraper.OnRequest(func(req *flyscrape.Request) {
		urls = append(urls, req.URL)
	})

	scraper.Run()

	require.Len(t, urls, 3)
	require.Contains(t, urls, "http://www.example.com")
	require.Contains(t, urls, "http://www.google.com")
	require.Contains(t, urls, "http://www.duckduckgo.com")
}