package registerreward

import (
	"encoding/binary"
	"testing"

	"github.com/redis/go-redis/v9"
)

func TestParseRegisterRewardEventSupportsJavaSerializedStringValues(t *testing.T) {
	message := redis.XMessage{
		ID: "1777262756108-0",
		Values: map[string]any{
			"eventId":     javaSerializedStringForTest("REGISTER_REWARD:LIKEI:2048614597363036161"),
			"sysOrigin":   javaSerializedStringForTest("LIKEI"),
			"userId":      javaSerializedStringForTest("2048614597363036161"),
			"countryId":   javaSerializedStringForTest("1231833351745187842"),
			"publishedAt": javaSerializedStringForTest("1777262756107"),
		},
	}

	event, err := parseRegisterRewardEvent(message)
	if err != nil {
		t.Fatalf("parseRegisterRewardEvent() error = %v", err)
	}
	if event.EventID != "REGISTER_REWARD:LIKEI:2048614597363036161" {
		t.Fatalf("eventID = %q", event.EventID)
	}
	if event.SysOrigin != "LIKEI" {
		t.Fatalf("sysOrigin = %q", event.SysOrigin)
	}
	if event.UserID != 2048614597363036161 {
		t.Fatalf("userID = %d", event.UserID)
	}
	if event.CountryID != 1231833351745187842 {
		t.Fatalf("countryID = %d", event.CountryID)
	}
}

func TestParseRegisterRewardEventStillSupportsPlainStringValues(t *testing.T) {
	message := redis.XMessage{
		ID: "1-0",
		Values: map[string]any{
			"eventId":   "REGISTER_REWARD:LIKEI:2048614597363036161",
			"sysOrigin": "LIKEI",
			"userId":    "2048614597363036161",
			"countryId": "1231833351745187842",
		},
	}

	event, err := parseRegisterRewardEvent(message)
	if err != nil {
		t.Fatalf("parseRegisterRewardEvent() error = %v", err)
	}
	if event.UserID != 2048614597363036161 || event.CountryID != 1231833351745187842 {
		t.Fatalf("unexpected event: %+v", event)
	}
}

func javaSerializedStringForTest(value string) string {
	payload := []byte(value)
	result := make([]byte, 7+len(payload))
	copy(result[:5], []byte{0xac, 0xed, 0x00, 0x05, 0x74})
	binary.BigEndian.PutUint16(result[5:7], uint16(len(payload)))
	copy(result[7:], payload)
	return string(result)
}