package buscompose

// The fixtures the copied bus composer is held to (issue 1377, ADR 0547 §5): the same source is compiled into the
// controller's internal/broker to write the expected lists, and into mesh-sdk's buscompose to compare against them.

// UserListFixture is one mesh's records, and the hashes its accounts carry.
type UserListFixture struct {
	Name    string
	Records Records
	// Hashless are users given no hash, so they are left out and named.
	Hashless []string
}

func fixtureTelegramSeat() Seat {
	return Seat{Name: "telegram-sender", Accepts: []string{"send"}, Emits: []string{"delivered", "failed"}}
}

// UserListFixtures are the meshes, from the controller's own tests' records outward.
func UserListFixtures() []UserListFixture {
	return []UserListFixture{
		{Name: "empty"},
		{Name: "the controller's someRecords", Records: Records{
			Nodes: []string{"two", "one"},
			Assigned: map[string][]Declared{
				"one": {{Module: "telegram", Serves: []string{"status"}}},
				"two": {{Module: "shop", Emits: []string{"order.placed"}}},
			},
			Enrolling: []string{"three"},
			People:    map[string][]string{"ada": {"mesh-catalog.catalog_tools"}},
		}},
		{Name: "seats, consumers, people and a hashless user", Hashless: []string{"two.audit"}, Records: Records{
			Nodes: []string{"one", "two"},
			Assigned: map[string][]Declared{
				"one": {
					{Module: "telegram", Holds: []Seat{fixtureTelegramSeat()}, Serves: []string{"status"}},
					{Module: "nats", SnapshotsTheBus: true, Serves: []string{"nats_streams"}},
					{Module: "mesh-watchman"},
					{Module: "mesh-grants", Emits: []string{"membership-changed"}},
				},
				"two": {
					{Module: "shop", Uses: []Seat{fixtureTelegramSeat()}, Emits: []string{"order.placed"}},
					{Module: "audit", Consumes: []string{"shop.order.placed"}},
				},
			},
			People:          map[string][]string{"ada": {"*"}, "bob": {"shop.status"}},
			Interchangeable: map[string]bool{"shop": true},
		}},
		{Name: "state, logs, streams, queues and processes", Records: Records{
			Nodes: []string{"ace", "novox"},
			Assigned: map[string][]Declared{
				"novox": {
					{Module: "mesh-delivery-builder", Emits: []string{"built"},
						State: []Bucket{{Module: "mesh-delivery-builder", Name: "steps", History: 5},
							{Module: "mesh-delivery-builder", Name: "presence", PerMachine: true, KeyTTL: true, TTLSeconds: 60}},
						Logs:    []Log{{Module: "mesh-delivery-builder", Name: "builds", MaxMiB: 64}},
						Streams: []ModuleStream{{Module: "mesh-delivery-builder", Name: "asks", Events: []string{"ask"}, MaxAgeDays: 7, MaxMiB: 32, WorkQueue: true}},
						Queues:  []QueueOwner{{Process: "worker", Stream: "asks", MaxDeliver: 5}},
						Processes: []ProcessPrincipal{{Process: "worker", Emits: []string{"built"},
							Queues: []QueueOwner{{Process: "worker", Stream: "asks", MaxDeliver: 5}},
							State:  []string{"steps"}, Invokes: []string{"gitea.gitea_commit"}}},
						Invokes: []string{"gitea.gitea_commit"},
					},
					{Module: "mesh-delivery-view", Reads: []string{"mesh-delivery-builder.steps"},
						KeyedReads: []KeyedRead{{Read: "mesh-delivery-builder.presence", Key: "novox"}}},
				},
				"ace": {
					{Module: "plex", Serves: []string{"plex_status"}, Checks: []string{"plex.plex_status"}},
					{Module: "silent", NoAccount: true},
				},
			},
			RootFree: map[string]bool{"ace": true},
		}},
	}
}

// HashOf is the stand-in hash a fixture's user carries.
func HashOf(user string) string {
	h := "$2a$11$"
	for len(h) < 29 {
		h += user
	}
	return h[:29] + "fixturefixturefixturefixture00"
}

// ComposedFor is a fixture's user list as the composer writes it, and the users left out.
func ComposedFor(f UserListFixture) (string, []string, error) {
	users, err := Users(f.Records)
	if err != nil {
		return "", nil, err
	}
	hashes := map[string]string{}
	skip := map[string]bool{}
	for _, u := range f.Hashless {
		skip[u] = true
	}
	for _, u := range users {
		if !skip[u.Username()] {
			hashes[u.Username()] = HashOf(u.Username())
		}
	}
	filled, missing := WithPasswords(users, hashes)
	list, err := ComposeAccounts(filled)
	return list, missing, err
}

// MembershipsFor is every membership a fixture's records issue, by `<node>.<module>`, as the composer makes them.
func MembershipsFor(f UserListFixture) map[string]Membership {
	where := PlacementsOf(f.Records, f.Records.Interchangeable)
	out := map[string]Membership{}
	for node, ds := range f.Records.Assigned {
		for _, d := range ds {
			out[node+"."+d.Module] = MembershipFor(node, d, where)
		}
	}
	return out
}