package store

import (
	"errors"
	"testing"
)

func TestSettingsAreVersionedAndTwoEditsCannotBothWin(t *testing.T) {
	s := capacityStore(t)
	ctx := t.Context()
	if v, err := s.ClusterSettings(ctx); err != nil || v.Version != 0 {
		t.Fatalf("empty store: %+v %v", v, err)
	}
	v1, err := s.PutClusterSettings(ctx, 0, "router: {}\n", "import", "from server.yaml")
	if err != nil || v1 != 1 {
		t.Fatalf("first: %d %v", v1, err)
	}
	if _, err := s.PutClusterSettings(ctx, 0, "x: 1\n", "late", ""); !errors.Is(err, ErrSettingsChanged) {
		t.Fatalf("a change from an old version: %v", err)
	}
	if _, err := s.PutClusterSettings(ctx, 1, "guard: {}\n", "ilker", "guard"); err != nil {
		t.Fatal(err)
	}
	cur, _ := s.ClusterSettings(ctx)
	if cur.Version != 2 || cur.Body != "guard: {}\n" || cur.By != "ilker" {
		t.Errorf("newest: %+v", cur)
	}
	if n, _ := s.ClusterSettingsVersion(ctx); n != 2 {
		t.Errorf("version %d", n)
	}
	old, _ := s.ClusterSettingsAt(ctx, 1)
	if old.Body != "router: {}\n" || old.Note != "from server.yaml" {
		t.Errorf("version 1: %+v", old)
	}
	h, _ := s.ClusterSettingsHistory(ctx, 10)
	if len(h) != 2 || h[0].Version != 2 {
		t.Errorf("history: %+v", h)
	}
}