1 files changed, 76 insertions, 5 deletions

diff --git a/backend/internal/store/memory.go b/backend/internal/store/memory.go
index a77e877..1ee2e05 100644
--- a/backend/internal/store/memory.go
+++ b/backend/internal/store/memory.go
@@ -49,6 +49,17 @@ func (s *MemoryStore) SeedMockData() {
 		s.heartbeats[svc.ID] = make([]*model.Heartbeat, 0)
 		s.seedHistory(svc.ID)
 	}
+
+	s.maintenances = []model.Maintenance{
+		{
+			ID:        s.nextMtnID,
+			Title:     "Manutenção Programada — Servidores",
+			StartTime: now.Add(-1 * time.Hour),
+			EndTime:   now.Add(1 * time.Hour),
+			IsActive:  true,
+		},
+	}
+	s.nextMtnID++
 }
 
 func (s *MemoryStore) seedHistory(serviceID int) {
@@ -187,21 +198,35 @@ func (s *MemoryStore) AddHeartbeat(hb model.Heartbeat) error {
 	return nil
 }
 
-func (s *MemoryStore) GetHistory(serviceID int, limit int) ([]model.Heartbeat, error) {
+func (s *MemoryStore) GetHistory(serviceID int, limit int, offset int) ([]model.Heartbeat, error) {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
 
 	hbs := s.heartbeats[serviceID]
-	if len(hbs) > limit {
-		hbs = hbs[len(hbs)-limit:]
-	}
-	result := make([]model.Heartbeat, len(hbs))
+	reverse := make([]*model.Heartbeat, len(hbs))
 	for i, hb := range hbs {
+		reverse[len(hbs)-1-i] = hb
+	}
+	if offset >= len(reverse) {
+		return []model.Heartbeat{}, nil
+	}
+	if offset+limit > len(reverse) {
+		limit = len(reverse) - offset
+	}
+	page := reverse[offset : offset+limit]
+	result := make([]model.Heartbeat, len(page))
+	for i, hb := range page {
 		result[i] = *hb
 	}
 	return result, nil
 }
 
+func (s *MemoryStore) CountHeartbeats(serviceID int) (int, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return len(s.heartbeats[serviceID]), nil
+}
+
 func (s *MemoryStore) GetLastHeartbeat(serviceID int) (*model.Heartbeat, error) {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
@@ -225,6 +250,52 @@ func (s *MemoryStore) GetActiveMaintenance(now time.Time) (*model.Maintenance, e
 	return nil, nil
 }
 
+func (s *MemoryStore) ListMaintenances() ([]model.Maintenance, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	result := make([]model.Maintenance, len(s.maintenances))
+	copy(result, s.maintenances)
+	return result, nil
+}
+
+func (s *MemoryStore) AddMaintenance(m model.Maintenance) (*model.Maintenance, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	m.ID = s.nextMtnID
+	s.nextMtnID++
+	s.maintenances = append(s.maintenances, m)
+	return &m, nil
+}
+
+func (s *MemoryStore) UpdateMaintenance(id int, m model.Maintenance) (*model.Maintenance, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	for i, existing := range s.maintenances {
+		if existing.ID == id {
+			m.ID = id
+			s.maintenances[i] = m
+			return &m, nil
+		}
+	}
+	return nil, errors.New("manutencao nao encontrada")
+}
+
+func (s *MemoryStore) DeleteMaintenance(id int) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	for i, m := range s.maintenances {
+		if m.ID == id {
+			s.maintenances = append(s.maintenances[:i], s.maintenances[i+1:]...)
+			return nil
+		}
+	}
+	return errors.New("manutencao nao encontrada")
+}
+
 func (s *MemoryStore) GetServiceStats(serviceID int) (*model.ServiceStats, error) {
 	s.mu.RLock()
 	defer s.mu.RUnlock()