package hostactors

import "testing"

func TestPlan13SignedHomeAgreement(t *testing.T) {
	for _, home := range []string{"", "ie", "ca", "@home", "IE"} {
		r := Roster{HomeRegion: "ie"}
		if r.MatchesHome(home) != (home == "ie") {
			t.Fatal(home)
		}
	}
	if !(Roster{}).MatchesHome("") || (Roster{}).MatchesHome("ie") {
		t.Fatal("legacy roster grants alias")
	}
}

func TestPlan13HomeDesignationIsSignedAndOptional(t *testing.T) {
	d, sg, o := fixture(t)
	if _, err := d.Read(t.Context()); err != nil {
		t.Fatal("legacy roster", err)
	}
	next := Clone(o.Roster)
	next.HomeRegion = "ie"
	updated, err := d.Replace(t.Context(), sg, o, next)
	if err != nil {
		t.Fatal(err)
	}
	read, err := d.Read(t.Context())
	if err != nil || !read.Roster.MatchesHome("ie") {
		t.Fatal(read, err)
	}
	next = Clone(updated.Roster)
	next.HomeRegion = "@home"
	if _, err := d.Replace(t.Context(), sg, updated, next); err == nil {
		t.Fatal("engine token accepted as designation")
	}
}

func TestPlan13HomeDesignationWriteOnce(t *testing.T) {
	t.Setenv("CARLOS_HOST_CLAIM", "1")
	for _, home := range []string{"ie", "uk", ""} {
		t.Run(home, func(t *testing.T) {
			d, sg, o := fixture(t)
			next := Clone(o.Roster)
			next.HomeRegion = "ie"
			o, err := d.Replace(t.Context(), sg, o, next)
			if err != nil {
				t.Fatal(err)
			}
			next = Clone(o.Roster)
			next.HomeRegion = home
			_, err = d.Replace(t.Context(), sg, o, next)
			if (err == nil) != (home == "ie") {
				t.Fatalf("change to %q: %v", home, err)
			}
			current, err := d.Read(t.Context())
			if err != nil || current.Roster.HomeRegion != "ie" {
				t.Fatalf("designation changed: %+v %v", current, err)
			}
			if home != "ie" && current.ETag != o.ETag {
				t.Fatal("refusal wrote roster")
			}
		})
	}
}

// With host claims off the roster keeps main's behaviour: the designation
// can be changed or cleared like any other field.
func TestPlan13HomeDesignationFlagOffIsUnpinned(t *testing.T) {
	t.Setenv("CARLOS_HOST_CLAIM", "")
	for _, home := range []string{"uk", ""} {
		t.Run(home, func(t *testing.T) {
			d, sg, o := fixture(t)
			next := Clone(o.Roster)
			next.HomeRegion = "ie"
			o, err := d.Replace(t.Context(), sg, o, next)
			if err != nil {
				t.Fatal(err)
			}
			next = Clone(o.Roster)
			next.HomeRegion = home
			if _, err := d.Replace(t.Context(), sg, o, next); err != nil {
				t.Fatalf("flag-off change to %q refused: %v", home, err)
			}
			current, err := d.Read(t.Context())
			if err != nil || current.Roster.HomeRegion != home {
				t.Fatalf("flag-off designation = %+v %v, want %q", current.Roster.HomeRegion, err, home)
			}
		})
	}
}