package contract_test

import (
	"context"
	"errors"
	"strings"
	"testing"

	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/fullsync/contract"
	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/queue/zset"

	"github.com/gogf/gf/v2/container/gvar"
)

type unusedRedis struct{}

func (unusedRedis) Do(context.Context, string, ...any) (*gvar.Var, error) {
	panic("naming contracts must not access Redis")
}

func (unusedRedis) Eval(context.Context, string, int64, []string, []any) (*gvar.Var, error) {
	panic("naming contracts must not access Redis")
}

func TestKeysMatchExistingQueue(t *testing.T) {
	for _, prefix := range []string{"", "flow:", "sim-status:", "custom-prefix"} {
		keys, err := contract.NewKeys(prefix)
		if err != nil {
			t.Fatal(err)
		}
		store, err := zset.New(unusedRedis{}, prefix)
		if err != nil {
			t.Fatal(err)
		}
		for _, pair := range []struct {
			old, next func(string) (string, error)
		}{
			{store.RunMetaKey, keys.RunMetaKey}, {store.RunChannelsKey, keys.RunChannelsKey},
			{store.TaskStateKey, keys.TaskStateKey}, {store.FailedKey, keys.FailedKey},
		} {
			old, oldErr := pair.old("run:1")
			next, nextErr := pair.next("run:1")
			if oldErr != nil || nextErr != nil || old != next || !strings.Contains(next, "{run:1}") {
				t.Errorf("run naming changed: old=%q new=%q errors=%v/%v", old, next, oldErr, nextErr)
			}
		}
		for _, pair := range []struct {
			old, next func(string, int, string) (string, error)
		}{
			{store.RoundActiveKey, keys.RoundActiveKey}, {store.RoundWaitingKey, keys.RoundWaitingKey},
			{store.RoundLeaseKey, keys.RoundLeaseKey},
		} {
			old, oldErr := pair.old("run:1", 3, "channel")
			next, nextErr := pair.next("run:1", 3, "channel")
			if oldErr != nil || nextErr != nil || old != next {
				t.Errorf("round naming changed: old=%q new=%q errors=%v/%v", old, next, oldErr, nextErr)
			}
		}
		if keys.ActiveRunsKey() != store.ActiveRunsKey() || keys.FailedRunsKey() != store.FailedRunsKey() {
			t.Fatal("existing global index names changed")
		}
	}
}

func TestNewKeysAndClusterBoundaries(t *testing.T) {
	keys, _ := contract.NewKeys("flow:")
	stats, _ := keys.RoundStatsKey("run", 2)
	archive, _ := keys.ArchiveStateKey("run")
	if stats != "flow:{run}:round:2:stats" || archive != "flow:{run}:archive" {
		t.Fatalf("new run keys changed: %s, %s", stats, archive)
	}
	action, _ := keys.ReplayActionKey("a")
	lease, _ := keys.ReplayLeaseKey("a")
	idempotency, _ := keys.ReplayIdempotencyKey("source", "a{different-slot}:key")
	for _, key := range []string{action, lease, idempotency, keys.PendingReplayActionsKey()} {
		if !strings.HasPrefix(key, "flow:{replay}:") || strings.Count(key, "{") != 1 {
			t.Fatalf("replay key escaped action slot: %s", key)
		}
	}
	if action != "flow:{replay}:action:a:meta" || lease != "flow:{replay}:action:a:lease" {
		t.Fatal("action naming changed")
	}
	for _, key := range []string{keys.ActiveRunsKey(), keys.FailedRunsKey(), keys.AllRunsKey(), keys.PendingArchivesKey()} {
		if strings.ContainsAny(key, "{}") {
			t.Fatalf("global index unexpectedly shares run slot: %s", key)
		}
	}
	first, _ := keys.ReplayIdempotencyKey("a:b", "c")
	second, _ := keys.ReplayIdempotencyKey("a", "b:c")
	repeat, _ := keys.ReplayIdempotencyKey("a:b", "c")
	otherSource, _ := keys.ReplayIdempotencyKey("other", "c")
	if first == second || first == otherSource || first != repeat {
		t.Fatal("idempotency scope is ambiguous or unstable")
	}
}

func TestInvalidKeyParts(t *testing.T) {
	keys := contract.Keys{}
	for _, id := range []string{"", " ", "trim ", "{run}", "run}", "run/path", "run\\path", "run\n", "invalid\xff"} {
		if _, err := keys.RunMetaKey(id); !errors.Is(err, contract.ErrInvalidArgument) {
			t.Errorf("invalid ID %q returned %v", id, err)
		}
	}
	if _, err := contract.NewKeys("prefix:{wrong}:"); !errors.Is(err, contract.ErrInvalidArgument) {
		t.Fatalf("invalid prefix returned %v", err)
	}
	if _, err := keys.RoundStatsKey("run", 0); !errors.Is(err, contract.ErrInvalidArgument) {
		t.Fatalf("invalid round returned %v", err)
	}
	if _, err := keys.RoundActiveKey("run", 1, " "); !errors.Is(err, contract.ErrInvalidArgument) {
		t.Fatalf("invalid channel returned %v", err)
	}
	if key, err := keys.RunMetaKey("run"); err != nil || key != "flow:{run}:meta" {
		t.Fatalf("zero-value keys differ from legacy default: %s %v", key, err)
	}
}