package tests

import (
	"fmt"
	"sync"
	"sync/atomic"
	"time"

	authpb "git.techease.ru/Smart-search/smart-search-back/pkg/pb/auth"
)

func (s *IntegrationSuite) TestConcurrent_Registration_WithSingleInviteCode() {
	maxUses := 3
	inviteCode := s.createActiveInviteCode(maxUses)

	var wg sync.WaitGroup
	var successCount int32
	var errorCount int32
	goroutines := 20

	startBarrier := make(chan struct{})

	for i := 0; i < goroutines; i++ {
		wg.Add(1)
		go func(idx int) {
			defer wg.Done()

			<-startBarrier

			email := fmt.Sprintf("concurrent_reg_%d_%d@example.com", idx, time.Now().UnixNano())

			_, err := s.authClient.Register(s.ctx, &authpb.RegisterRequest{
				Email:      email,
				Password:   "testpassword123",
				Name:       fmt.Sprintf("User %d", idx),
				Phone:      fmt.Sprintf("+1%010d", idx),
				InviteCode: inviteCode,
				Ip:         "127.0.0.1",
				UserAgent:  "integration-test",
			})

			if err == nil {
				atomic.AddInt32(&successCount, 1)
			} else {
				atomic.AddInt32(&errorCount, 1)
			}
		}(i)
	}

	close(startBarrier)
	wg.Wait()

	s.T().Logf("Registration results - Success: %d, Errors: %d", successCount, errorCount)

	s.LessOrEqual(int(successCount), maxUses,
		"Количество успешных регистраций (%d) не должно превышать лимит invite-кода (%d)", successCount, maxUses)

	remainingUses := s.getInviteCodeUsageCount(inviteCode)
	s.T().Logf("Remaining invite code uses: %d", remainingUses)

	s.Equal(maxUses-int(successCount), remainingUses,
		"Оставшееся количество использований должно соответствовать успешным регистрациям")
}

func (s *IntegrationSuite) TestConcurrent_Registration_InviteCodeDeactivation() {
	maxUses := 2
	inviteCode := s.createActiveInviteCode(maxUses)

	s.True(s.isInviteCodeActive(inviteCode), "Invite code должен быть активен изначально")

	var wg sync.WaitGroup
	var successCount int32
	goroutines := 10

	startBarrier := make(chan struct{})

	for i := 0; i < goroutines; i++ {
		wg.Add(1)
		go func(idx int) {
			defer wg.Done()

			<-startBarrier

			email := fmt.Sprintf("deactivation_test_%d_%d@example.com", idx, time.Now().UnixNano())

			_, err := s.authClient.Register(s.ctx, &authpb.RegisterRequest{
				Email:      email,
				Password:   "testpassword123",
				Name:       fmt.Sprintf("User %d", idx),
				Phone:      fmt.Sprintf("+2%010d", idx),
				InviteCode: inviteCode,
				Ip:         "127.0.0.1",
				UserAgent:  "integration-test",
			})

			if err == nil {
				atomic.AddInt32(&successCount, 1)
			}
		}(i)
	}

	close(startBarrier)
	wg.Wait()

	s.T().Logf("Registration success count: %d", successCount)

	s.LessOrEqual(int(successCount), maxUses,
		"Не должно быть больше %d успешных регистраций", maxUses)

	remainingUses := s.getInviteCodeUsageCount(inviteCode)
	s.GreaterOrEqual(remainingUses, 0,
		"Количество использований не должно быть отрицательным")
}

func (s *IntegrationSuite) TestConcurrent_Registration_MultipleInviteCodes() {
	inviteCode1 := s.createActiveInviteCode(2)
	inviteCode2 := s.createActiveInviteCode(2)

	var wg sync.WaitGroup
	var success1, success2 int32
	goroutines := 10

	startBarrier := make(chan struct{})

	for i := 0; i < goroutines; i++ {
		wg.Add(1)
		go func(idx int) {
			defer wg.Done()

			<-startBarrier

			var code int64
			if idx%2 == 0 {
				code = inviteCode1
			} else {
				code = inviteCode2
			}

			email := fmt.Sprintf("multi_invite_%d_%d@example.com", idx, time.Now().UnixNano())

			_, err := s.authClient.Register(s.ctx, &authpb.RegisterRequest{
				Email:      email,
				Password:   "testpassword123",
				Name:       fmt.Sprintf("User %d", idx),
				Phone:      fmt.Sprintf("+3%010d", idx),
				InviteCode: code,
				Ip:         "127.0.0.1",
				UserAgent:  "integration-test",
			})

			if err == nil {
				if code == inviteCode1 {
					atomic.AddInt32(&success1, 1)
				} else {
					atomic.AddInt32(&success2, 1)
				}
			}
		}(i)
	}

	close(startBarrier)
	wg.Wait()

	s.T().Logf("Multi-invite results - Code1: %d, Code2: %d", success1, success2)

	s.LessOrEqual(int(success1), 2,
		"Invite code 1 не должен превышать лимит")
	s.LessOrEqual(int(success2), 2,
		"Invite code 2 не должен превышать лимит")

	remaining1 := s.getInviteCodeUsageCount(inviteCode1)
	remaining2 := s.getInviteCodeUsageCount(inviteCode2)

	s.Equal(2-int(success1), remaining1,
		"Остаток invite code 1 должен соответствовать успешным регистрациям")
	s.Equal(2-int(success2), remaining2,
		"Остаток invite code 2 должен соответствовать успешным регистрациям")
}