package models

import (
	"testing"
	"time"
)

func TestUpsertHost(t *testing.T) {
	state := NewState()

	// Test insert new host
	host1 := Host{
		ID:       "host-1",
		Hostname: "server-1",
		Status:   "online",
	}
	state.UpsertHost(host1)

	hosts := state.GetHosts()
	if len(hosts) != 1 {
		t.Fatalf("Expected 1 host, got %d", len(hosts))
	}
	if hosts[0].ID != "host-1" {
		t.Errorf("Expected host ID 'host-1', got %q", hosts[0].ID)
	}

	// Test update existing host
	host1Updated := Host{
		ID:       "host-1",
		Hostname: "server-1",
		Status:   "offline",
	}
	state.UpsertHost(host1Updated)

	hosts = state.GetHosts()
	if len(hosts) != 1 {
		t.Fatalf("Expected 1 host after update, got %d", len(hosts))
	}
	if hosts[0].Status != "offline" {
		t.Errorf("Expected status 'offline', got %q", hosts[0].Status)
	}

	// Test multiple hosts and sorting
	state.UpsertHost(Host{ID: "host-2", Hostname: "alpha-server"})
	state.UpsertHost(Host{ID: "host-3", Hostname: "zulu-server"})

	hosts = state.GetHosts()
	if len(hosts) != 3 {
		t.Fatalf("Expected 3 hosts, got %d", len(hosts))
	}

	// Hosts should be sorted by hostname
	if hosts[0].Hostname != "alpha-server" {
		t.Errorf("First host should be 'alpha-server', got %q", hosts[0].Hostname)
	}
}

func TestGetHosts_Copy(t *testing.T) {
	state := NewState()

	state.UpsertHost(Host{ID: "host-1", Hostname: "server-1"})

	hosts1 := state.GetHosts()
	hosts2 := state.GetHosts()

	// Modify one slice
	if len(hosts1) > 0 {
		hosts1[0].Hostname = "modified"
	}

	// Other slice should be unchanged
	if len(hosts2) > 0 && hosts2[0].Hostname == "modified" {
		t.Error("GetHosts should return a copy, not the same slice")
	}

	// Original state should be unchanged
	hosts3 := state.GetHosts()
	if hosts3[0].Hostname == "modified" {
		t.Error("State should be unchanged by modifications to returned slice")
	}
}

func TestRemoveHost(t *testing.T) {
	state := NewState()

	// Insert hosts
	state.UpsertHost(Host{ID: "host-1", Hostname: "server1"})
	state.UpsertHost(Host{ID: "host-2", Hostname: "server2"})

	// Remove existing host
	removed, ok := state.RemoveHost("host-1")
	if !ok {
		t.Error("Expected RemoveHost to return true for existing host")
	}
	if removed.ID != "host-1" {
		t.Errorf("Expected removed host ID 'host-1', got %q", removed.ID)
	}

	hosts := state.GetHosts()
	if len(hosts) != 1 {
		t.Fatalf("Expected 1 host after removal, got %d", len(hosts))
	}
	if hosts[0].ID != "host-2" {
		t.Errorf("Remaining host should be 'host-2', got %q", hosts[0].ID)
	}

	// Remove non-existing host
	removed, ok = state.RemoveHost("non-existent")
	if ok {
		t.Error("Expected RemoveHost to return false for non-existent host")
	}
	if removed.ID != "" {
		t.Errorf("Expected empty Host for non-existent removal, got ID %q", removed.ID)
	}
}

func TestSetHostStatus(t *testing.T) {
	state := NewState()

	// Test with no hosts
	changed := state.SetHostStatus("host-1", "online")
	if changed {
		t.Error("SetHostStatus should return false when host doesn't exist")
	}

	// Add host and set status
	state.UpsertHost(Host{ID: "host-1", Hostname: "server1", Status: "offline"})

	changed = state.SetHostStatus("host-1", "online")
	if !changed {
		t.Error("SetHostStatus should return true when host exists")
	}

	hosts := state.GetHosts()
	if hosts[0].Status != "online" {
		t.Errorf("Expected status 'online', got %q", hosts[0].Status)
	}

	// Set same status (no change)
	changed = state.SetHostStatus("host-1", "online")
	if !changed {
		t.Error("SetHostStatus should return true even when status unchanged")
	}
}

func TestTouchHost(t *testing.T) {
	state := NewState()

	now := time.Now()

	// Test with non-existent host
	ok := state.TouchHost("host-1", now)
	if ok {
		t.Error("TouchHost should return false for non-existent host")
	}

	// Add host and touch it
	state.UpsertHost(Host{ID: "host-1", Hostname: "server1"})

	later := now.Add(time.Hour)
	ok = state.TouchHost("host-1", later)
	if !ok {
		t.Error("TouchHost should return true for existing host")
	}

	hosts := state.GetHosts()
	if !hosts[0].LastSeen.Equal(later) {
		t.Errorf("LastSeen should be updated to %v, got %v", later, hosts[0].LastSeen)
	}
}

func TestUpdateRecentlyResolved(t *testing.T) {
	state := NewState()

	now := time.Now()
	alerts := []ResolvedAlert{
		{
			Alert: Alert{
				ID:           "alert-1",
				Type:         "cpu_high",
				Level:        "warning",
				ResourceName: "server-1",
				Message:      "High CPU usage",
			},
			ResolvedTime: now,
		},
		{
			Alert: Alert{
				ID:           "alert-2",
				Type:         "disk_low",
				Level:        "critical",
				ResourceName: "server-2",
				Message:      "Low disk space",
			},
			ResolvedTime: now.Add(-time.Hour),
		},
	}

	state.UpdateRecentlyResolved(alerts)

	// The method updates internal state - verify via snapshot or other means
	// Since RecentlyResolvedAlerts might be accessed differently, just verify no panic
	// and method executes correctly
}

func TestSetConnectionHealth(t *testing.T) {
	state := NewState()

	// Set connection healthy
	state.SetConnectionHealth("pve-cluster-1", true)

	snapshot := state.GetSnapshot()
	if healthy, ok := snapshot.ConnectionHealth["pve-cluster-1"]; !ok || !healthy {
		t.Error("Expected connection to be healthy")
	}

	// Set connection unhealthy
	state.SetConnectionHealth("pve-cluster-1", false)

	snapshot = state.GetSnapshot()
	if healthy, ok := snapshot.ConnectionHealth["pve-cluster-1"]; !ok || healthy {
		t.Error("Expected connection to be unhealthy")
	}

	// Multiple connections
	state.SetConnectionHealth("pve-cluster-2", true)
	state.SetConnectionHealth("pbs-instance-1", true)

	snapshot = state.GetSnapshot()
	if len(snapshot.ConnectionHealth) != 3 {
		t.Errorf("Expected 3 connection health entries, got %d", len(snapshot.ConnectionHealth))
	}
}

func TestRemoveConnectionHealth(t *testing.T) {
	state := NewState()

	// Set up connection health entries
	state.SetConnectionHealth("pve-cluster-1", true)
	state.SetConnectionHealth("pve-cluster-2", false)

	// Remove one
	state.RemoveConnectionHealth("pve-cluster-1")

	snapshot := state.GetSnapshot()
	if _, ok := snapshot.ConnectionHealth["pve-cluster-1"]; ok {
		t.Error("Expected pve-cluster-1 to be removed")
	}
	if _, ok := snapshot.ConnectionHealth["pve-cluster-2"]; !ok {
		t.Error("Expected pve-cluster-2 to still exist")
	}

	// Remove non-existent (should not panic)
	state.RemoveConnectionHealth("non-existent")

	// Remove remaining
	state.RemoveConnectionHealth("pve-cluster-2")
	snapshot = state.GetSnapshot()
	if len(snapshot.ConnectionHealth) != 0 {
		t.Errorf("Expected empty connection health map, got %d entries", len(snapshot.ConnectionHealth))
	}
}

func TestUpdatePBSBackups(t *testing.T) {
	state := NewState()

	now := time.Now()

	// Add backups from first instance
	backups1 := []PBSBackup{
		{ID: "backup-1", Instance: "pbs-1", BackupTime: now},
		{ID: "backup-2", Instance: "pbs-1", BackupTime: now.Add(-time.Hour)},
	}
	state.UpdatePBSBackups("pbs-1", backups1)

	snapshot := state.GetSnapshot()
	if len(snapshot.PBSBackups) != 2 {
		t.Fatalf("Expected 2 backups, got %d", len(snapshot.PBSBackups))
	}

	// Add backups from second instance
	backups2 := []PBSBackup{
		{ID: "backup-3", Instance: "pbs-2", BackupTime: now.Add(-30 * time.Minute)},
	}
	state.UpdatePBSBackups("pbs-2", backups2)

	snapshot = state.GetSnapshot()
	if len(snapshot.PBSBackups) != 3 {
		t.Fatalf("Expected 3 backups, got %d", len(snapshot.PBSBackups))
	}

	// Update first instance (should replace its backups)
	backups1Updated := []PBSBackup{
		{ID: "backup-4", Instance: "pbs-1", BackupTime: now.Add(time.Hour)},
	}
	state.UpdatePBSBackups("pbs-1", backups1Updated)

	snapshot = state.GetSnapshot()
	if len(snapshot.PBSBackups) != 2 {
		t.Fatalf("Expected 2 backups after update, got %d", len(snapshot.PBSBackups))
	}

	// Verify pbs-1 backups were replaced
	hasOldBackup := false
	for _, b := range snapshot.PBSBackups {
		if b.ID == "backup-1" || b.ID == "backup-2" {
			hasOldBackup = true
			break
		}
	}
	if hasOldBackup {
		t.Error("Old pbs-1 backups should have been replaced")
	}
}

func TestUpdatePMGBackups(t *testing.T) {
	state := NewState()

	now := time.Now()

	// Add backups from first instance
	backups1 := []PMGBackup{
		{Filename: "backup-1.conf", Instance: "pmg-1", BackupTime: now},
		{Filename: "backup-2.conf", Instance: "pmg-1", BackupTime: now.Add(-time.Hour)},
	}
	state.UpdatePMGBackups("pmg-1", backups1)

	snapshot := state.GetSnapshot()
	if len(snapshot.PMGBackups) != 2 {
		t.Fatalf("Expected 2 backups, got %d", len(snapshot.PMGBackups))
	}

	// Backups should be sorted by time (newest first)
	if snapshot.PMGBackups[0].BackupTime.Before(snapshot.PMGBackups[1].BackupTime) {
		t.Error("Backups should be sorted by time descending")
	}

	// Add backups from second instance
	backups2 := []PMGBackup{
		{Filename: "backup-3.conf", Instance: "pmg-2", BackupTime: now.Add(-30 * time.Minute)},
	}
	state.UpdatePMGBackups("pmg-2", backups2)

	snapshot = state.GetSnapshot()
	if len(snapshot.PMGBackups) != 3 {
		t.Fatalf("Expected 3 backups, got %d", len(snapshot.PMGBackups))
	}

	// Update first instance with empty (should remove its backups)
	state.UpdatePMGBackups("pmg-1", []PMGBackup{})

	snapshot = state.GetSnapshot()
	if len(snapshot.PMGBackups) != 1 {
		t.Fatalf("Expected 1 backup after clearing pmg-1, got %d", len(snapshot.PMGBackups))
	}
	if snapshot.PMGBackups[0].Instance != "pmg-2" {
		t.Error("Remaining backup should be from pmg-2")
	}
}

func TestUpdatePhysicalDisks(t *testing.T) {
	state := NewState()

	// Add disks from first instance
	disks1 := []PhysicalDisk{
		{ID: "disk-1", Instance: "pve-1", Node: "node1", DevPath: "/dev/sda"},
		{ID: "disk-2", Instance: "pve-1", Node: "node1", DevPath: "/dev/sdb"},
	}
	state.UpdatePhysicalDisks("pve-1", disks1)

	snapshot := state.GetSnapshot()
	if len(snapshot.PhysicalDisks) != 2 {
		t.Fatalf("Expected 2 disks, got %d", len(snapshot.PhysicalDisks))
	}

	// Add disks from second instance
	disks2 := []PhysicalDisk{
		{ID: "disk-3", Instance: "pve-2", Node: "node2", DevPath: "/dev/sda"},
	}
	state.UpdatePhysicalDisks("pve-2", disks2)

	snapshot = state.GetSnapshot()
	if len(snapshot.PhysicalDisks) != 3 {
		t.Fatalf("Expected 3 disks, got %d", len(snapshot.PhysicalDisks))
	}

	// Update first instance (should replace its disks)
	disks1Updated := []PhysicalDisk{
		{ID: "disk-4", Instance: "pve-1", Node: "node1", DevPath: "/dev/nvme0n1"},
	}
	state.UpdatePhysicalDisks("pve-1", disks1Updated)

	snapshot = state.GetSnapshot()
	if len(snapshot.PhysicalDisks) != 2 {
		t.Fatalf("Expected 2 disks after update, got %d", len(snapshot.PhysicalDisks))
	}

	// Verify sorting by node then devpath
	if snapshot.PhysicalDisks[0].Node > snapshot.PhysicalDisks[1].Node {
		t.Error("Disks should be sorted by node")
	}
}

func TestUpdateStorageForInstance(t *testing.T) {
	state := NewState()

	// Add storage from first instance
	storage1 := []Storage{
		{ID: "storage-1", Instance: "pve-1", Name: "local"},
		{ID: "storage-2", Instance: "pve-1", Name: "ceph-pool"},
	}
	state.UpdateStorageForInstance("pve-1", storage1)

	snapshot := state.GetSnapshot()
	if len(snapshot.Storage) != 2 {
		t.Fatalf("Expected 2 storage entries, got %d", len(snapshot.Storage))
	}

	// Add storage from second instance
	storage2 := []Storage{
		{ID: "storage-3", Instance: "pve-2", Name: "local"},
	}
	state.UpdateStorageForInstance("pve-2", storage2)

	snapshot = state.GetSnapshot()
	if len(snapshot.Storage) != 3 {
		t.Fatalf("Expected 3 storage entries, got %d", len(snapshot.Storage))
	}

	// Update first instance with empty (should remove its storage)
	state.UpdateStorageForInstance("pve-1", []Storage{})

	snapshot = state.GetSnapshot()
	if len(snapshot.Storage) != 1 {
		t.Fatalf("Expected 1 storage after clearing pve-1, got %d", len(snapshot.Storage))
	}
}

func TestUpdatePBSInstances(t *testing.T) {
	state := NewState()

	instances := []PBSInstance{
		{ID: "pbs-1", Name: "Backup Server 1"},
		{ID: "pbs-2", Name: "Backup Server 2"},
	}
	state.UpdatePBSInstances(instances)

	snapshot := state.GetSnapshot()
	if len(snapshot.PBSInstances) != 2 {
		t.Fatalf("Expected 2 PBS instances, got %d", len(snapshot.PBSInstances))
	}

	// Replace with different instances
	newInstances := []PBSInstance{
		{ID: "pbs-3", Name: "New Backup Server"},
	}
	state.UpdatePBSInstances(newInstances)

	snapshot = state.GetSnapshot()
	if len(snapshot.PBSInstances) != 1 {
		t.Fatalf("Expected 1 PBS instance after replacement, got %d", len(snapshot.PBSInstances))
	}
	if snapshot.PBSInstances[0].ID != "pbs-3" {
		t.Error("Expected pbs-3 instance")
	}
}

func TestUpdatePBSInstance(t *testing.T) {
	state := NewState()

	// Add first instance
	state.UpdatePBSInstance(PBSInstance{ID: "pbs-1", Name: "Server 1"})

	snapshot := state.GetSnapshot()
	if len(snapshot.PBSInstances) != 1 {
		t.Fatalf("Expected 1 PBS instance, got %d", len(snapshot.PBSInstances))
	}

	// Add second instance
	state.UpdatePBSInstance(PBSInstance{ID: "pbs-2", Name: "Server 2"})

	snapshot = state.GetSnapshot()
	if len(snapshot.PBSInstances) != 2 {
		t.Fatalf("Expected 2 PBS instances, got %d", len(snapshot.PBSInstances))
	}

	// Update existing instance
	state.UpdatePBSInstance(PBSInstance{ID: "pbs-1", Name: "Server 1 Updated"})

	snapshot = state.GetSnapshot()
	if len(snapshot.PBSInstances) != 2 {
		t.Fatalf("Expected 2 PBS instances after update, got %d", len(snapshot.PBSInstances))
	}

	// Find updated instance
	var found bool
	for _, inst := range snapshot.PBSInstances {
		if inst.ID == "pbs-1" && inst.Name == "Server 1 Updated" {
			found = true
			break
		}
	}
	if !found {
		t.Error("Expected pbs-1 to be updated with new name")
	}
}

func TestUpdatePMGInstances(t *testing.T) {
	state := NewState()

	instances := []PMGInstance{
		{ID: "pmg-1", Name: "Mail Gateway 1"},
		{ID: "pmg-2", Name: "Mail Gateway 2"},
	}
	state.UpdatePMGInstances(instances)

	snapshot := state.GetSnapshot()
	if len(snapshot.PMGInstances) != 2 {
		t.Fatalf("Expected 2 PMG instances, got %d", len(snapshot.PMGInstances))
	}

	// Replace with empty
	state.UpdatePMGInstances([]PMGInstance{})

	snapshot = state.GetSnapshot()
	if len(snapshot.PMGInstances) != 0 {
		t.Fatalf("Expected 0 PMG instances after clearing, got %d", len(snapshot.PMGInstances))
	}
}

func TestUpdatePMGInstance(t *testing.T) {
	state := NewState()

	// Add first instance
	state.UpdatePMGInstance(PMGInstance{ID: "pmg-1", Name: "Gateway 1"})

	snapshot := state.GetSnapshot()
	if len(snapshot.PMGInstances) != 1 {
		t.Fatalf("Expected 1 PMG instance, got %d", len(snapshot.PMGInstances))
	}

	// Add second instance
	state.UpdatePMGInstance(PMGInstance{ID: "pmg-2", Name: "Gateway 2"})

	snapshot = state.GetSnapshot()
	if len(snapshot.PMGInstances) != 2 {
		t.Fatalf("Expected 2 PMG instances, got %d", len(snapshot.PMGInstances))
	}

	// Update existing instance
	state.UpdatePMGInstance(PMGInstance{ID: "pmg-1", Name: "Gateway 1 Updated"})

	snapshot = state.GetSnapshot()
	if len(snapshot.PMGInstances) != 2 {
		t.Fatalf("Expected 2 PMG instances after update, got %d", len(snapshot.PMGInstances))
	}

	// Verify update
	var found bool
	for _, inst := range snapshot.PMGInstances {
		if inst.ID == "pmg-1" && inst.Name == "Gateway 1 Updated" {
			found = true
			break
		}
	}
	if !found {
		t.Error("Expected pmg-1 to be updated with new name")
	}
}

func TestUpdateCephClustersForInstance(t *testing.T) {
	state := NewState()

	// Add clusters from first instance
	clusters1 := []CephCluster{
		{ID: "ceph-1", Instance: "pve-1", Name: "ceph-pool-1"},
		{ID: "ceph-2", Instance: "pve-1", Name: "ceph-pool-2"},
	}
	state.UpdateCephClustersForInstance("pve-1", clusters1)

	snapshot := state.GetSnapshot()
	if len(snapshot.CephClusters) != 2 {
		t.Fatalf("Expected 2 clusters, got %d", len(snapshot.CephClusters))
	}

	// Add clusters from second instance
	clusters2 := []CephCluster{
		{ID: "ceph-3", Instance: "pve-2", Name: "ceph-pool-1"},
	}
	state.UpdateCephClustersForInstance("pve-2", clusters2)

	snapshot = state.GetSnapshot()
	if len(snapshot.CephClusters) != 3 {
		t.Fatalf("Expected 3 clusters, got %d", len(snapshot.CephClusters))
	}

	// Update first instance with empty (should remove its clusters)
	state.UpdateCephClustersForInstance("pve-1", []CephCluster{})

	snapshot = state.GetSnapshot()
	if len(snapshot.CephClusters) != 1 {
		t.Fatalf("Expected 1 cluster after clearing pve-1, got %d", len(snapshot.CephClusters))
	}
	if snapshot.CephClusters[0].Instance != "pve-2" {
		t.Error("Remaining cluster should be from pve-2")
	}
}

func TestUpdateBackupTasksForInstance(t *testing.T) {
	state := NewState()

	now := time.Now()

	// Add tasks from first instance
	tasks1 := []BackupTask{
		{ID: "pve-1-task-1", Instance: "pve-1", StartTime: now},
		{ID: "pve-1-task-2", Instance: "pve-1", StartTime: now.Add(-time.Hour)},
	}
	state.UpdateBackupTasksForInstance("pve-1", tasks1)

	snapshot := state.GetSnapshot()
	if len(snapshot.PVEBackups.BackupTasks) != 2 {
		t.Fatalf("Expected 2 tasks, got %d", len(snapshot.PVEBackups.BackupTasks))
	}

	// Tasks should be sorted by start time descending
	if snapshot.PVEBackups.BackupTasks[0].StartTime.Before(snapshot.PVEBackups.BackupTasks[1].StartTime) {
		t.Error("Tasks should be sorted by start time descending")
	}

	// Add tasks from second instance
	tasks2 := []BackupTask{
		{ID: "pve-2-task-1", Instance: "pve-2", StartTime: now.Add(-30 * time.Minute)},
	}
	state.UpdateBackupTasksForInstance("pve-2", tasks2)

	snapshot = state.GetSnapshot()
	if len(snapshot.PVEBackups.BackupTasks) != 3 {
		t.Fatalf("Expected 3 tasks, got %d", len(snapshot.PVEBackups.BackupTasks))
	}

	// Update first instance (should replace its tasks)
	tasks1Updated := []BackupTask{
		{ID: "pve-1-task-3", Instance: "pve-1", StartTime: now.Add(time.Hour)},
	}
	state.UpdateBackupTasksForInstance("pve-1", tasks1Updated)

	snapshot = state.GetSnapshot()
	if len(snapshot.PVEBackups.BackupTasks) != 2 {
		t.Fatalf("Expected 2 tasks after update, got %d", len(snapshot.PVEBackups.BackupTasks))
	}
}

func TestUpdateReplicationJobsForInstance(t *testing.T) {
	state := NewState()

	// Add jobs from first instance
	jobs1 := []ReplicationJob{
		{ID: "job-1", Instance: "pve-1", GuestID: 100, JobNumber: 0},
		{ID: "job-2", Instance: "pve-1", GuestID: 101, JobNumber: 0},
	}
	state.UpdateReplicationJobsForInstance("pve-1", jobs1)

	snapshot := state.GetSnapshot()
	if len(snapshot.ReplicationJobs) != 2 {
		t.Fatalf("Expected 2 jobs, got %d", len(snapshot.ReplicationJobs))
	}

	// Add jobs from second instance
	jobs2 := []ReplicationJob{
		{ID: "job-3", Instance: "pve-2", GuestID: 200, JobNumber: 0},
	}
	state.UpdateReplicationJobsForInstance("pve-2", jobs2)

	snapshot = state.GetSnapshot()
	if len(snapshot.ReplicationJobs) != 3 {
		t.Fatalf("Expected 3 jobs, got %d", len(snapshot.ReplicationJobs))
	}

	// Update first instance with empty (should remove its jobs)
	state.UpdateReplicationJobsForInstance("pve-1", []ReplicationJob{})

	snapshot = state.GetSnapshot()
	if len(snapshot.ReplicationJobs) != 1 {
		t.Fatalf("Expected 1 job after clearing pve-1, got %d", len(snapshot.ReplicationJobs))
	}
	if snapshot.ReplicationJobs[0].Instance != "pve-2" {
		t.Error("Remaining job should be from pve-2")
	}
}

func TestUpdateGuestSnapshotsForInstance(t *testing.T) {
	state := NewState()

	now := time.Now()

	// Add snapshots from first instance
	snapshots1 := []GuestSnapshot{
		{ID: "pve-1-snap-1", Instance: "pve-1", VMID: 100, Name: "snapshot1", Time: now},
		{ID: "pve-1-snap-2", Instance: "pve-1", VMID: 100, Name: "snapshot2", Time: now.Add(-time.Hour)},
	}
	state.UpdateGuestSnapshotsForInstance("pve-1", snapshots1)

	snapshot := state.GetSnapshot()
	if len(snapshot.PVEBackups.GuestSnapshots) != 2 {
		t.Fatalf("Expected 2 snapshots, got %d", len(snapshot.PVEBackups.GuestSnapshots))
	}

	// Add snapshots from second instance
	snapshots2 := []GuestSnapshot{
		{ID: "pve-2-snap-1", Instance: "pve-2", VMID: 200, Name: "snapshot1", Time: now.Add(-30 * time.Minute)},
	}
	state.UpdateGuestSnapshotsForInstance("pve-2", snapshots2)

	snapshot = state.GetSnapshot()
	if len(snapshot.PVEBackups.GuestSnapshots) != 3 {
		t.Fatalf("Expected 3 snapshots, got %d", len(snapshot.PVEBackups.GuestSnapshots))
	}

	// Update first instance (should replace its snapshots)
	snapshots1Updated := []GuestSnapshot{
		{ID: "pve-1-snap-3", Instance: "pve-1", VMID: 100, Name: "new-snapshot", Time: now.Add(time.Hour)},
	}
	state.UpdateGuestSnapshotsForInstance("pve-1", snapshots1Updated)

	snapshot = state.GetSnapshot()
	if len(snapshot.PVEBackups.GuestSnapshots) != 2 {
		t.Fatalf("Expected 2 snapshots after update, got %d", len(snapshot.PVEBackups.GuestSnapshots))
	}
}

func TestSyncGuestBackupTimes(t *testing.T) {
	state := NewState()

	now := time.Now()
	oldBackup := now.Add(-24 * time.Hour)
	newBackup := now.Add(-1 * time.Hour)

	// Set up VMs and containers
	state.UpdateVMs([]VM{
		{VMID: 100, Name: "vm-100", Instance: "pve-1"},
		{VMID: 101, Name: "vm-101", Instance: "pve-1"},
	})
	state.UpdateContainers([]Container{
		{VMID: 200, Name: "ct-200", Instance: "pve-1"},
	})

	// Add storage backups for VM 100 (must include Instance for proper matching)
	state.mu.Lock()
	state.PVEBackups.StorageBackups = []StorageBackup{
		{ID: "pve-1-backup-1", VMID: 100, Instance: "pve-1", Time: oldBackup},
		{ID: "pve-1-backup-2", VMID: 100, Instance: "pve-1", Time: newBackup}, // newer
	}
	state.mu.Unlock()

	// Add PBS backup for container 200
	state.UpdatePBSBackups("pbs-1", []PBSBackup{
		{ID: "pbs-backup-1", VMID: "200", BackupTime: newBackup},
	})

	// Sync backup times
	state.SyncGuestBackupTimes()

	snapshot := state.GetSnapshot()

	// VM 100 should have the newer backup time
	var vm100 *VM
	for i := range snapshot.VMs {
		if snapshot.VMs[i].VMID == 100 {
			vm100 = &snapshot.VMs[i]
			break
		}
	}
	if vm100 == nil {
		t.Fatal("VM 100 not found")
	}
	if !vm100.LastBackup.Equal(newBackup) {
		t.Errorf("VM 100 LastBackup = %v, expected %v", vm100.LastBackup, newBackup)
	}

	// VM 101 should have no backup time (zero)
	var vm101 *VM
	for i := range snapshot.VMs {
		if snapshot.VMs[i].VMID == 101 {
			vm101 = &snapshot.VMs[i]
			break
		}
	}
	if vm101 == nil {
		t.Fatal("VM 101 not found")
	}
	if !vm101.LastBackup.IsZero() {
		t.Errorf("VM 101 LastBackup should be zero, got %v", vm101.LastBackup)
	}

	// Container 200 should have backup time from PBS
	var ct200 *Container
	for i := range snapshot.Containers {
		if snapshot.Containers[i].VMID == 200 {
			ct200 = &snapshot.Containers[i]
			break
		}
	}
	if ct200 == nil {
		t.Fatal("Container 200 not found")
	}
	if !ct200.LastBackup.Equal(newBackup) {
		t.Errorf("Container 200 LastBackup = %v, expected %v", ct200.LastBackup, newBackup)
	}
}

// TestSyncGuestBackupTimesCrossInstance verifies that backup matching uses instance+VMID.
// This prevents a newly created container on one instance from incorrectly showing
// backup time from a different container with the same VMID on another instance.
func TestSyncGuestBackupTimesCrossInstance(t *testing.T) {
	state := NewState()

	now := time.Now()
	threeMonthsAgo := now.Add(-90 * 24 * time.Hour)

	// Set up containers with the SAME VMID on DIFFERENT instances
	// This simulates: pve-1 has VMID 100 with old backup, pve-2 has newly created VMID 100
	state.UpdateContainers([]Container{
		{VMID: 100, Name: "old-container", Instance: "pve-1"},
		{VMID: 100, Name: "new-container", Instance: "pve-2"}, // newly created, no backup
	})

	// Add a 3-month-old backup for pve-1's container (VMID 100)
	state.mu.Lock()
	state.PVEBackups.StorageBackups = []StorageBackup{
		{ID: "pve-1-backup-old", VMID: 100, Instance: "pve-1", Time: threeMonthsAgo},
	}
	state.mu.Unlock()

	// Sync backup times
	state.SyncGuestBackupTimes()

	snapshot := state.GetSnapshot()

	// Find both containers
	var oldContainer, newContainer *Container
	for i := range snapshot.Containers {
		if snapshot.Containers[i].Instance == "pve-1" && snapshot.Containers[i].VMID == 100 {
			oldContainer = &snapshot.Containers[i]
		}
		if snapshot.Containers[i].Instance == "pve-2" && snapshot.Containers[i].VMID == 100 {
			newContainer = &snapshot.Containers[i]
		}
	}

	if oldContainer == nil {
		t.Fatal("pve-1 container not found")
	}
	if newContainer == nil {
		t.Fatal("pve-2 container not found")
	}

	// The old container on pve-1 SHOULD have the backup time
	if !oldContainer.LastBackup.Equal(threeMonthsAgo) {
		t.Errorf("pve-1 container LastBackup = %v, expected %v", oldContainer.LastBackup, threeMonthsAgo)
	}

	// The NEW container on pve-2 should NOT have any backup time (it's a different container!)
	if !newContainer.LastBackup.IsZero() {
		t.Errorf("pve-2 container (newly created) should have no backup, got %v", newContainer.LastBackup)
	}
}

// TestSyncGuestBackupTimesNamespaceDisambiguation verifies that PBS namespace is used to
// disambiguate backups when multiple VMs have the same VMID across different PVE instances.
// This addresses issue #1095 where users have multiple PVE instances with overlapping VMIDs.
func TestSyncGuestBackupTimesNamespaceDisambiguation(t *testing.T) {
	state := NewState()

	now := time.Now()
	pveBackupTime := now.Add(-1 * time.Hour)
	pveNatBackupTime := now.Add(-2 * time.Hour)

	// Set up VMs with the SAME VMID on DIFFERENT instances
	state.UpdateVMs([]VM{
		{VMID: 100, Name: "webserver-pve", Instance: "pve", Node: "node1"},
		{VMID: 100, Name: "webserver-nat", Instance: "pve-nat", Node: "node2"},
	})

	// Add PBS backups with namespaces that correspond to the PVE instances
	state.mu.Lock()
	state.PBSBackups = []PBSBackup{
		{
			ID:         "pbs-pve-100",
			VMID:       "100",
			Namespace:  "pve",
			BackupType: "vm",
			BackupTime: pveBackupTime,
			Instance:   "pbs-main",
		},
		{
			ID:         "pbs-nat-100",
			VMID:       "100",
			Namespace:  "nat", // Should match "pve-nat" instance
			BackupType: "vm",
			BackupTime: pveNatBackupTime,
			Instance:   "pbs-main",
		},
	}
	state.mu.Unlock()

	// Sync backup times
	state.SyncGuestBackupTimes()

	snapshot := state.GetSnapshot()

	// Find both VMs
	var vmPVE, vmNAT *VM
	for i := range snapshot.VMs {
		if snapshot.VMs[i].Instance == "pve" && snapshot.VMs[i].VMID == 100 {
			vmPVE = &snapshot.VMs[i]
		}
		if snapshot.VMs[i].Instance == "pve-nat" && snapshot.VMs[i].VMID == 100 {
			vmNAT = &snapshot.VMs[i]
		}
	}

	if vmPVE == nil {
		t.Fatal("pve VM not found")
	}
	if vmNAT == nil {
		t.Fatal("pve-nat VM not found")
	}

	// The pve VM should have the backup with namespace "pve"
	if !vmPVE.LastBackup.Equal(pveBackupTime) {
		t.Errorf("pve VM LastBackup = %v, expected %v (from namespace 'pve')", vmPVE.LastBackup, pveBackupTime)
	}

	// The pve-nat VM should have the backup with namespace "nat"
	if !vmNAT.LastBackup.Equal(pveNatBackupTime) {
		t.Errorf("pve-nat VM LastBackup = %v, expected %v (from namespace 'nat')", vmNAT.LastBackup, pveNatBackupTime)
	}
}

// TestSyncGuestBackupTimesVMIDCollisionNonMatchingNamespace verifies that when the same VMID
// exists on multiple PVE instances and a PBS backup namespace matches neither, both guests
// get zero LastBackup instead of a false positive.
func TestSyncGuestBackupTimesVMIDCollisionNonMatchingNamespace(t *testing.T) {
	state := NewState()

	now := time.Now()
	backupTime := now.Add(-1 * time.Hour)

	// Two VMs with the same VMID on different instances
	state.UpdateVMs([]VM{
		{VMID: 100, Name: "vm-pve1", Instance: "pve1", Node: "node1"},
		{VMID: 100, Name: "vm-pve2", Instance: "pve2", Node: "node2"},
	})

	// PBS backup with a namespace that matches neither instance
	state.mu.Lock()
	state.PBSBackups = []PBSBackup{
		{
			ID:         "pbs-100",
			VMID:       "100",
			Namespace:  "staging",
			BackupType: "vm",
			BackupTime: backupTime,
			Instance:   "pbs-main",
		},
	}
	state.mu.Unlock()

	state.SyncGuestBackupTimes()
	snapshot := state.GetSnapshot()

	for _, vm := range snapshot.VMs {
		if vm.VMID == 100 && !vm.LastBackup.IsZero() {
			t.Errorf("VM %q on %s should have zero LastBackup (ambiguous VMID, non-matching namespace), got %v",
				vm.Name, vm.Instance, vm.LastBackup)
		}
	}
}

// TestSyncGuestBackupTimesVMIDCollisionEmptyNamespace verifies that when the same VMID
// exists on multiple PVE instances and a PBS backup has no namespace, both guests
// get zero LastBackup.
func TestSyncGuestBackupTimesVMIDCollisionEmptyNamespace(t *testing.T) {
	state := NewState()

	now := time.Now()
	backupTime := now.Add(-1 * time.Hour)

	state.UpdateVMs([]VM{
		{VMID: 100, Name: "vm-pve1", Instance: "pve1", Node: "node1"},
		{VMID: 100, Name: "vm-pve2", Instance: "pve2", Node: "node2"},
	})

	// PBS backup with empty namespace
	state.mu.Lock()
	state.PBSBackups = []PBSBackup{
		{
			ID:         "pbs-100",
			VMID:       "100",
			Namespace:  "",
			BackupType: "vm",
			BackupTime: backupTime,
			Instance:   "pbs-main",
		},
	}
	state.mu.Unlock()

	state.SyncGuestBackupTimes()
	snapshot := state.GetSnapshot()

	for _, vm := range snapshot.VMs {
		if vm.VMID == 100 && !vm.LastBackup.IsZero() {
			t.Errorf("VM %q on %s should have zero LastBackup (ambiguous VMID, empty namespace), got %v",
				vm.Name, vm.Instance, vm.LastBackup)
		}
	}
}

// TestSyncGuestBackupTimesUniqueVMIDFallback verifies that a unique VMID still gets
// the PBS backup via fallback even when the namespace doesn't match.
func TestSyncGuestBackupTimesUniqueVMIDFallback(t *testing.T) {
	state := NewState()

	now := time.Now()
	backupTime := now.Add(-1 * time.Hour)

	// Single VM — VMID is unique
	state.UpdateVMs([]VM{
		{VMID: 100, Name: "my-vm", Instance: "pve1", Node: "node1"},
	})

	// PBS backup with a namespace that does NOT match the instance
	state.mu.Lock()
	state.PBSBackups = []PBSBackup{
		{
			ID:         "pbs-100",
			VMID:       "100",
			Namespace:  "daily",
			BackupType: "vm",
			BackupTime: backupTime,
			Instance:   "pbs-main",
		},
	}
	state.mu.Unlock()

	state.SyncGuestBackupTimes()
	snapshot := state.GetSnapshot()

	var found *VM
	for i := range snapshot.VMs {
		if snapshot.VMs[i].VMID == 100 {
			found = &snapshot.VMs[i]
		}
	}
	if found == nil {
		t.Fatal("VM not found")
	}
	if !found.LastBackup.Equal(backupTime) {
		t.Errorf("unique VMID should fall back to PBS backup; got LastBackup = %v, want %v",
			found.LastBackup, backupTime)
	}
}

// TestSyncGuestBackupTimesVMContainerCollision verifies that when a VM and Container
// share the same VMID on different instances, neither gets an unmatched PBS backup.
func TestSyncGuestBackupTimesVMContainerCollision(t *testing.T) {
	state := NewState()

	now := time.Now()
	backupTime := now.Add(-1 * time.Hour)

	state.UpdateVMs([]VM{
		{VMID: 100, Name: "vm-pve1", Instance: "pve1", Node: "node1"},
	})
	state.UpdateContainers([]Container{
		{VMID: 100, Name: "ct-pve2", Instance: "pve2", Node: "node2"},
	})

	// PBS backup with namespace matching neither
	state.mu.Lock()
	state.PBSBackups = []PBSBackup{
		{
			ID:         "pbs-100",
			VMID:       "100",
			Namespace:  "other",
			BackupType: "vm",
			BackupTime: backupTime,
			Instance:   "pbs-main",
		},
	}
	state.mu.Unlock()

	state.SyncGuestBackupTimes()
	snapshot := state.GetSnapshot()

	for _, vm := range snapshot.VMs {
		if vm.VMID == 100 && !vm.LastBackup.IsZero() {
			t.Errorf("VM %q should have zero LastBackup (ambiguous VMID with container), got %v",
				vm.Name, vm.LastBackup)
		}
	}
	for _, ct := range snapshot.Containers {
		if ct.VMID == 100 && !ct.LastBackup.IsZero() {
			t.Errorf("Container %q should have zero LastBackup (ambiguous VMID with VM), got %v",
				ct.Name, ct.LastBackup)
		}
	}
}

func TestUpdateStorageBackupsForInstance(t *testing.T) {
	state := NewState()

	now := time.Now()

	// Set up a VM so node normalization has something to work with
	state.UpdateVMsForInstance("pve-1", []VM{
		{VMID: 100, Instance: "pve-1", Node: "node1"},
	})

	// Add backups from first instance
	backups1 := []StorageBackup{
		{ID: "pve-1-backup-1", Instance: "pve-1", VMID: 100, Time: now, Node: "node1"},
		{ID: "pve-1-backup-2", Instance: "pve-1", VMID: 100, Time: now.Add(-time.Hour), Node: "node1"},
	}
	state.UpdateStorageBackupsForInstance("pve-1", backups1)

	snapshot := state.GetSnapshot()
	if len(snapshot.PVEBackups.StorageBackups) != 2 {
		t.Fatalf("Expected 2 backups, got %d", len(snapshot.PVEBackups.StorageBackups))
	}

	// Backups should be sorted by time descending
	if snapshot.PVEBackups.StorageBackups[0].Time.Before(snapshot.PVEBackups.StorageBackups[1].Time) {
		t.Error("Backups should be sorted by time descending")
	}

	// Add backups from second instance
	backups2 := []StorageBackup{
		{ID: "pve-2-backup-1", Instance: "pve-2", VMID: 200, Time: now.Add(-30 * time.Minute), Node: "node2"},
	}
	state.UpdateStorageBackupsForInstance("pve-2", backups2)

	snapshot = state.GetSnapshot()
	if len(snapshot.PVEBackups.StorageBackups) != 3 {
		t.Fatalf("Expected 3 backups, got %d", len(snapshot.PVEBackups.StorageBackups))
	}

	// Update first instance (should replace its backups)
	backups1Updated := []StorageBackup{
		{ID: "pve-1-backup-3", Instance: "pve-1", VMID: 100, Time: now.Add(time.Hour), Node: "node1"},
	}
	state.UpdateStorageBackupsForInstance("pve-1", backups1Updated)

	snapshot = state.GetSnapshot()
	if len(snapshot.PVEBackups.StorageBackups) != 2 {
		t.Fatalf("Expected 2 backups after update, got %d", len(snapshot.PVEBackups.StorageBackups))
	}

	// Verify old pve-1 backups were replaced
	for _, b := range snapshot.PVEBackups.StorageBackups {
		if b.ID == "pve-1-backup-1" || b.ID == "pve-1-backup-2" {
			t.Error("Old pve-1 backups should have been replaced")
		}
	}
}