//go:build unix

package hostbox

import (
	"context"
	"github.com/carlosframework/platform/internal/genselect"
	"github.com/carlosframework/platform/internal/hostclaim"
	"github.com/carlosframework/platform/internal/park"
	"testing"
)

func TestPlan13AdmissionKeepsExistingEngineName(t *testing.T) {
	for _, home := range []string{"ie", ""} {
		t.Run("home="+home, func(t *testing.T) {
			_, store, o := workFixture(t)
			writer := Writer{HomeRegion: home, Claims: store, Box: "box", Region: park.PlacementRegion("ie"), AdmissionEvidence: func(context.Context, hostclaim.Observed, hostclaim.Admission, *genselect.Plan) error { return nil }}
			in := hostclaim.Admission{Box: "box", Mode: "cold", NewGeneration: "old", Region: "ie", PredecessorRegion: "ie"}
			old, err := writer.Admit(t.Context(), o, in, nil)
			if err != nil {
				t.Fatal(err)
			}
			// Restart against the stored named admission, rather than a synthesized holder.
			old, err = hostclaim.Read(t.Context(), store, o.Host)
			if err != nil {
				t.Fatal(err)
			}
			in.NewGeneration = "next"
			in.ObservedSession = old.Claim.Holder.Session
			in.ObservedGeneration = "old"
			next, err := writer.Admit(t.Context(), old, in, nil)
			if err != nil {
				t.Fatal(err)
			}
			a := next.Claim.Holder.Admissions
			if len(a) != 2 || a[0].Region != "ie" || a[1].Region != "ie" || a[1].PredecessorRegion != "ie" || a[1].Predecessor != "old" {
				t.Fatalf("%+v", a)
			}
			writer.Region = ""
			in.Region = ""
			if _, err = writer.Admit(t.Context(), next, in, nil); err == nil {
				t.Fatal("unset admitted")
			}
		})
	}
}