package buscompose

import (
	"strings"
	"testing"
	"time"

	"github.com/nats-io/nats.go/jetstream"
)

// Defends issue 1790 (ADR 0547 §5): the grants part creates a declared bucket and stream as the controller asserts them.
func TestDeclaredStreamsAreCreatedAsTheControllerAssertsThem(t *testing.T) {
	plain := BucketStreamConfig(Bucket{Module: "mesh-vault", Name: "bus-accounts"})
	keyed := BucketStreamConfig(Bucket{Module: "m", Name: "presence", History: 5, TTLSeconds: 60, KeyTTL: true})
	queue := ModuleStreamConfig(ModuleStream{Module: "b", Name: "ASKS", Events: []string{"ask"}, MaxAgeDays: 7, MaxMiB: 32,
		WorkQueue: true, Duplicates: 1})
	logs := ModuleStream{Module: "mesh-build-go", Name: "GO_BUILD_LOGS", Events: []string{"log.>"}, MaxAgeDays: 14, MaxMiB: 2048}
	lcfg := ModuleStreamConfig(logs)
	grants := strings.Join(ownStreamGrants("mesh-build-go", []ModuleStream{logs, {Module: "b", Name: "ASKS", Events: []string{"ask"}, WorkQueue: true}}), " ")
	for _, row := range []struct {
		what      string
		got, want any
	}{
		{"bucket name", plain.Name, "KV_mesh-vault_bus-accounts"},
		{"bucket subjects", plain.Subjects[0], "$KV.mesh-vault_bus-accounts.>"},
		{"bucket history defaults to one", plain.MaxMsgsPerSubject, int64(1)},
		{"bucket cap", plain.MaxBytes, int64(StateMaxBytes)},
		{"bucket value cap", plain.MaxMsgSize, int32(StateMaxValueBytes)},
		{"bucket duplicate window", plain.Duplicates, 2 * time.Minute},
		{"bucket discards new", plain.Discard, jetstream.DiscardNew},
		{"bucket direct and rollup, no delete", plain.AllowDirect && plain.AllowRollup && plain.DenyDelete, true},
		{"bucket without key ttl", plain.AllowMsgTTL, false},
		{"history", keyed.MaxMsgsPerSubject, int64(5)},
		{"age", keyed.MaxAge, time.Minute},
		{"duplicate window under the age", keyed.Duplicates, time.Minute},
		{"key ttl markers", keyed.SubjectDeleteMarkerTTL, KeyTTLMarkerTTL},
		{"key ttl", keyed.AllowMsgTTL, true},
		{"queue retention", queue.Retention, jetstream.WorkQueuePolicy},
		{"queue subjects", queue.Subjects[0], "mesh.stream.b.event.ask"},
		{"queue age", queue.MaxAge, 7 * 24 * time.Hour},
		{"queue cap", queue.MaxBytes, int64(32 << 20)},
		{"queue discards new", queue.Discard, jetstream.DiscardNew},
		{"queue duplicates", queue.Duplicates, time.Hour},
		{"queue is read by its consumer, never directly", queue.AllowDirect, false},
		{"a module's stream is read back directly", lcfg.AllowDirect, true},
		{"a module's stream drops its oldest", lcfg.Discard, jetstream.DiscardOld},
		{"a module's stream cap", lcfg.MaxBytes, int64(2048 << 20)},
		{"a module's stream age", lcfg.MaxAge, 14 * 24 * time.Hour},
		{"its owner publishes and reads it, and no other's", grants,
			"mesh.stream.mesh-build-go.event.log.> $JS.API.STREAM.INFO.GO_BUILD_LOGS $JS.API.DIRECT.GET.GO_BUILD_LOGS"},
		{"queue metadata", queue.Metadata[WorkQueueMetadata] + queue.Metadata[RestrictedMetadata], "truetrue"},
	} {
		if row.got != row.want {
			t.Errorf("%s: %v, want %v", row.what, row.got, row.want)
		}
	}
}