package inventory

import (
	"context"
	"encoding/json"
	"errors"
	"testing"
	"time"
)

// **A condition's looks are kept in the store, replaced on every look and forgotten when it clears**
// (novox/hq issue 420): written under the lease, read back whole.
func TestAConditionsLooksAreKeptBesideTheBucket(t *testing.T) {
	inv := ForTest(t)
	ctx := t.Context()
	inv.ActsUnder(func(context.Context) (uint64, error) { return 0, errors.New("the lease is not held") })
	if err := inv.KeepConditionLooks(ctx, ConditionLooks{Key: "machine.ace.silent", Observations: 1,
		LastObserved: time.Now()}); err == nil {
		t.Fatal("looks were kept by a process that may not act")
	}
	inv.ActsUnder(func(context.Context) (uint64, error) { return 57, nil })
	at := time.Now().UTC().Truncate(time.Microsecond)
	for n := 1; n <= 3; n++ {
		evidence, _ := json.Marshal([]map[string]any{{"at": at, "said": "ace has not been heard from"}})
		if err := inv.KeepConditionLooks(ctx, ConditionLooks{Key: "machine.ace.silent", Observations: n,
			LastObserved: at, Evidence: evidence}); err != nil {
			t.Fatal(err)
		}
	}
	if err := inv.KeepConditionLooks(ctx, ConditionLooks{Key: "machine.ace.late", Observations: 2,
		LastObserved: at}); err != nil {
		t.Fatal(err)
	}
	got, kept, err := inv.ConditionLooksOf(ctx, "machine.ace.silent")
	if err != nil || !kept || got.Observations != 3 || !got.LastObserved.Equal(at) {
		t.Fatalf("read %+v kept %v: %v", got, kept, err)
	}
	var evidence []map[string]any
	if err := json.Unmarshal(got.Evidence, &evidence); err != nil || len(evidence) != 1 {
		t.Fatalf("evidence %s: %v", got.Evidence, err)
	}
	all, err := inv.AllConditionLooks(ctx)
	if err != nil || len(all) != 2 || all["machine.ace.late"].Observations != 2 ||
		string(all["machine.ace.late"].Evidence) != "[]" {
		t.Fatalf("all %+v: %v", all, err)
	}
	if err := inv.ForgetConditionLooks(ctx, "machine.ace.silent"); err != nil {
		t.Fatal(err)
	}
	if _, kept, err := inv.ConditionLooksOf(ctx, "machine.ace.silent"); kept || err != nil {
		t.Fatalf("a cleared condition's looks kept %v: %v", kept, err)
	}
}