package e2e

import (
	"os/exec"
	"strings"
	"testing"
)

// The sr-only summary describes the page to a screen reader, and reads as a spec anywhere else.
func TestALinkPreviewSaysWhatTheThingIsNotWhatThePageIs(t *testing.T) {
	if _, err := exec.LookPath("git"); err != nil {
		t.Skip("git is not installed")
	}
	in := newInstance(t)
	john := in.account("john")
	work := seed(t, in, john, "john", "johnbot")

	write(t, work, ".barerepo/config", "[repo]\nvisibility = \"public\"\n"+
		"description = \"a bot that answers\"\n")
	run(t, work, "git", "add", "-A")
	run(t, work, "git", "commit", "-qm", "describe the repository")
	run(t, work, "git", "push", "-q", in.url(john, "/john/johnbot"), "master")

	for _, c := range []struct {
		what, path string
		want       []string
	}{
		{"the repository log", "/john/johnbot", []string{"john/johnbot", "a bot that answers"}},
		{"the profile", "/john", []string{"john", "repositor"}},
	} {
		code, _, body := get(t, in.http.URL+c.path)
		if code != 200 {
			t.Fatalf("%s answered %d", c.what, code)
		}
		og := metaContent(body, "og:description")
		if og == "" {
			t.Errorf("%s has no og:description", c.what)
			continue
		}
		if strings.Contains(og, "This is the landing page") ||
			strings.Contains(og, "listing repositories sorted by last push") {
			t.Errorf("%s shares the screen reader summary: %q", c.what, og)
		}
		for _, w := range c.want {
			if !strings.Contains(og, w) {
				t.Errorf("%s og:description %q does not say %q", c.what, og, w)
			}
		}
		// The screen reader sentence must still be on the page, which chapter 25 requires.
		if !strings.Contains(body, "sr-only") {
			t.Errorf("%s lost its screen reader summary", c.what)
		}
	}
}

// metaContent pulls one meta tag's content out of a page.
func metaContent(body, prop string) string {
	i := strings.Index(body, `property="`+prop+`"`)
	if i < 0 {
		return ""
	}
	rest := body[i:]
	j := strings.Index(rest, `content="`)
	if j < 0 {
		return ""
	}
	rest = rest[j+len(`content="`):]
	k := strings.Index(rest, `"`)
	if k < 0 {
		return ""
	}
	return rest[:k]
}