oxirs-stream 0.2.4

//! Cloud-Native Manager Implementation

use anyhow::{anyhow, Result};
use chrono::{DateTime, Duration as ChronoDuration, Utc};
use serde::{Deserialize, Serialize};
use std::collections::{HashMap, BTreeMap};
use std::sync::Arc;
use std::time::{Duration, Instant};
use tokio::sync::{Mutex, RwLock};
use tracing::{debug, error, info, warn};
use uuid::Uuid;

use super::config::*;
use super::kubernetes::*;
use super::service_mesh::*;
use super::auto_scaling::*;
use super::observability::*;
use super::multi_cloud::*;
use super::gitops::*;
pub struct CloudNativeManager {
    config: CloudNativeConfig,
    kubernetes_client: Arc<dyn KubernetesClient>,
    service_mesh_client: Arc<dyn ServiceMeshClient>,
    metrics: Arc<RwLock<CloudNativeMetrics>>,
}

impl CloudNativeManager {
    /// Create a new cloud-native manager
    pub fn new(
        config: CloudNativeConfig,
        kubernetes_client: Arc<dyn KubernetesClient>,
        service_mesh_client: Arc<dyn ServiceMeshClient>,
    ) -> Self {
        Self {
            config,
            kubernetes_client,
            service_mesh_client,
            metrics: Arc::new(RwLock::new(CloudNativeMetrics::default())),
        }
    }

    /// Deploy OxiRS resources to Kubernetes
    pub async fn deploy(&self) -> Result<()> {
        info!("Starting deployment of OxiRS resources");

        // Create namespace
        self.create_namespace().await?;

        // Deploy CRDs
        self.deploy_crds().await?;

        // Deploy operator
        if self.config.kubernetes.operator.enabled {
            self.deploy_operator().await?;
        }

        // Configure service mesh
        if self.config.service_mesh.enabled {
            self.configure_service_mesh().await?;
        }

        // Setup monitoring
        if self.config.observability.monitoring.prometheus.enabled {
            self.setup_monitoring().await?;
        }

        // Setup auto-scaling
        if self.config.auto_scaling.enabled {
            self.setup_auto_scaling().await?;
        }

        info!("Successfully deployed OxiRS resources");
        Ok(())
    }

    /// Create namespace
    async fn create_namespace(&self) -> Result<()> {
        let namespace = KubernetesResource::Namespace {
            metadata: ObjectMetadata {
                name: self.config.kubernetes.namespace.clone(),
                namespace: None,
                labels: BTreeMap::from([
                    ("app".to_string(), "oxirs".to_string()),
                    ("managed-by".to_string(), "oxirs-operator".to_string()),
                ]),
                annotations: BTreeMap::new(),
            },
        };

        self.kubernetes_client.apply_resource(namespace).await?;
        Ok(())
    }

    /// Deploy CRDs
    async fn deploy_crds(&self) -> Result<()> {
        for crd in &self.config.kubernetes.crds {
            let resource = KubernetesResource::CustomResourceDefinition(crd.clone());
            self.kubernetes_client.apply_resource(resource).await?;
        }
        Ok(())
    }

    /// Deploy operator
    async fn deploy_operator(&self) -> Result<()> {
        let operator_deployment = self.create_operator_deployment();
        self.kubernetes_client.apply_resource(operator_deployment).await?;
        Ok(())
    }

    /// Create operator deployment
    fn create_operator_deployment(&self) -> KubernetesResource {
        KubernetesResource::Deployment {
            metadata: ObjectMetadata {
                name: "oxirs-operator".to_string(),
                namespace: Some(self.config.kubernetes.namespace.clone()),
                labels: BTreeMap::from([
                    ("app".to_string(), "oxirs-operator".to_string()),
                ]),
                annotations: BTreeMap::new(),
            },
            spec: DeploymentSpec {
                replicas: 1,
                selector: LabelSelector {
                    match_labels: BTreeMap::from([
                        ("app".to_string(), "oxirs-operator".to_string()),
                    ]),
                },
                template: PodTemplateSpec {
                    metadata: ObjectMetadata {
                        name: "oxirs-operator".to_string(),
                        namespace: Some(self.config.kubernetes.namespace.clone()),
                        labels: BTreeMap::from([
                            ("app".to_string(), "oxirs-operator".to_string()),
                        ]),
                        annotations: BTreeMap::new(),
                    },
                    spec: PodSpec {
                        containers: vec![
                            Container {
                                name: "operator".to_string(),
                                image: self.config.kubernetes.operator.image.clone(),
                                resources: Some(ResourceRequirements {
                                    cpu: "100m".to_string(),
                                    memory: "128Mi".to_string(),
                                }),
                                env: vec![
                                    EnvVar {
                                        name: "NAMESPACE".to_string(),
                                        value: self.config.kubernetes.namespace.clone(),
                                    },
                                    EnvVar {
                                        name: "RECONCILE_INTERVAL".to_string(),
                                        value: format!("{}s", self.config.kubernetes.operator.reconcile_interval.as_secs()),
                                    },
                                ],
                                ports: vec![
                                    ContainerPort {
                                        name: "metrics".to_string(),
                                        container_port: 8080,
                                        protocol: "TCP".to_string(),
                                    },
                                ],
                            },
                        ],
                        service_account: Some("oxirs-operator".to_string()),
                    },
                },
            },
        }
    }

    /// Configure service mesh
    async fn configure_service_mesh(&self) -> Result<()> {
        match self.config.service_mesh.provider {
            ServiceMeshProvider::Istio => self.configure_istio().await?,
            ServiceMeshProvider::Linkerd => self.configure_linkerd().await?,
            ServiceMeshProvider::ConsulConnect => self.configure_consul_connect().await?,
            _ => {
                warn!("Service mesh provider {:?} not implemented", self.config.service_mesh.provider);
            }
        }
        Ok(())
    }

    /// Configure Istio
    async fn configure_istio(&self) -> Result<()> {
        // Enable sidecar injection
        self.service_mesh_client.enable_sidecar_injection(&self.config.kubernetes.namespace).await?;

        // Configure destination rules
        self.service_mesh_client.apply_destination_rules(&self.config.service_mesh.traffic_management).await?;

        // Configure virtual services
        self.service_mesh_client.apply_virtual_services(&self.config.service_mesh.traffic_management).await?;

        // Configure authorization policies
        self.service_mesh_client.apply_authorization_policies(&self.config.service_mesh.security_policies).await?;

        Ok(())
    }

    /// Configure Linkerd
    async fn configure_linkerd(&self) -> Result<()> {
        // Implement Linkerd configuration
        warn!("Linkerd configuration not yet implemented");
        Ok(())
    }

    /// Configure Consul Connect
    async fn configure_consul_connect(&self) -> Result<()> {
        // Implement Consul Connect configuration
        warn!("Consul Connect configuration not yet implemented");
        Ok(())
    }

    /// Setup monitoring
    async fn setup_monitoring(&self) -> Result<()> {
        // Deploy Prometheus
        self.deploy_prometheus().await?;

        // Deploy service monitors
        self.deploy_service_monitors().await?;

        // Deploy Grafana
        if self.config.observability.dashboards.grafana.enabled {
            self.deploy_grafana().await?;
        }

        Ok(())
    }

    /// Deploy Prometheus
    async fn deploy_prometheus(&self) -> Result<()> {
        let prometheus = KubernetesResource::StatefulSet {
            metadata: ObjectMetadata {
                name: "prometheus".to_string(),
                namespace: Some(self.config.kubernetes.namespace.clone()),
                labels: BTreeMap::from([
                    ("app".to_string(), "prometheus".to_string()),
                ]),
                annotations: BTreeMap::new(),
            },
            spec: StatefulSetSpec {
                replicas: 1,
                selector: LabelSelector {
                    match_labels: BTreeMap::from([
                        ("app".to_string(), "prometheus".to_string()),
                    ]),
                },
                template: PodTemplateSpec {
                    metadata: ObjectMetadata {
                        name: "prometheus".to_string(),
                        namespace: Some(self.config.kubernetes.namespace.clone()),
                        labels: BTreeMap::from([
                            ("app".to_string(), "prometheus".to_string()),
                        ]),
                        annotations: BTreeMap::new(),
                    },
                    spec: PodSpec {
                        containers: vec![
                            Container {
                                name: "prometheus".to_string(),
                                image: "prom/prometheus:latest".to_string(),
                                resources: Some(self.config.observability.monitoring.prometheus.resources.clone()),
                                env: vec![],
                                ports: vec![
                                    ContainerPort {
                                        name: "web".to_string(),
                                        container_port: 9090,
                                        protocol: "TCP".to_string(),
                                    },
                                ],
                            },
                        ],
                        service_account: Some("prometheus".to_string()),
                    },
                },
                volume_claim_templates: vec![
                    VolumeClaimTemplate {
                        metadata: ObjectMetadata {
                            name: "prometheus-storage".to_string(),
                            namespace: Some(self.config.kubernetes.namespace.clone()),
                            labels: BTreeMap::new(),
                            annotations: BTreeMap::new(),
                        },
                        spec: VolumeClaimSpec {
                            access_modes: vec!["ReadWriteOnce".to_string()],
                            resources: ResourceRequirements {
                                cpu: "".to_string(),
                                memory: self.config.observability.monitoring.prometheus.storage_size.clone(),
                            },
                        },
                    },
                ],
            },
        };

        self.kubernetes_client.apply_resource(prometheus).await?;
        Ok(())
    }

    /// Deploy service monitors
    async fn deploy_service_monitors(&self) -> Result<()> {
        for monitor in &self.config.observability.monitoring.service_monitors {
            let service_monitor = KubernetesResource::ServiceMonitor(monitor.clone());
            self.kubernetes_client.apply_resource(service_monitor).await?;
        }
        Ok(())
    }

    /// Deploy Grafana
    async fn deploy_grafana(&self) -> Result<()> {
        let grafana = KubernetesResource::Deployment {
            metadata: ObjectMetadata {
                name: "grafana".to_string(),
                namespace: Some(self.config.kubernetes.namespace.clone()),
                labels: BTreeMap::from([
                    ("app".to_string(), "grafana".to_string()),
                ]),
                annotations: BTreeMap::new(),
            },
            spec: DeploymentSpec {
                replicas: 1,
                selector: LabelSelector {
                    match_labels: BTreeMap::from([
                        ("app".to_string(), "grafana".to_string()),
                    ]),
                },
                template: PodTemplateSpec {
                    metadata: ObjectMetadata {
                        name: "grafana".to_string(),
                        namespace: Some(self.config.kubernetes.namespace.clone()),
                        labels: BTreeMap::from([
                            ("app".to_string(), "grafana".to_string()),
                        ]),
                        annotations: BTreeMap::new(),
                    },
                    spec: PodSpec {
                        containers: vec![
                            Container {
                                name: "grafana".to_string(),
                                image: "grafana/grafana:latest".to_string(),
                                resources: Some(self.config.observability.dashboards.grafana.resources.clone()),
                                env: vec![
                                    EnvVar {
                                        name: "GF_SECURITY_ADMIN_USER".to_string(),
                                        value: self.config.observability.dashboards.grafana.admin_user.clone(),
                                    },
                                    EnvVar {
                                        name: "GF_SECURITY_ADMIN_PASSWORD".to_string(),
                                        value: self.config.observability.dashboards.grafana.admin_password.clone(),
                                    },
                                ],
                                ports: vec![
                                    ContainerPort {
                                        name: "web".to_string(),
                                        container_port: 3000,
                                        protocol: "TCP".to_string(),
                                    },
                                ],
                            },
                        ],
                        service_account: Some("grafana".to_string()),
                    },
                },
            },
        };

        self.kubernetes_client.apply_resource(grafana).await?;
        Ok(())
    }

    /// Setup auto-scaling
    async fn setup_auto_scaling(&self) -> Result<()> {
        if self.config.auto_scaling.hpa.enabled {
            self.setup_hpa().await?;
        }

        if self.config.auto_scaling.vpa.enabled {
            self.setup_vpa().await?;
        }

        Ok(())
    }

    /// Setup HPA
    async fn setup_hpa(&self) -> Result<()> {
        let hpa = KubernetesResource::HorizontalPodAutoscaler {
            metadata: ObjectMetadata {
                name: "oxirs-stream-hpa".to_string(),
                namespace: Some(self.config.kubernetes.namespace.clone()),
                labels: BTreeMap::from([
                    ("app".to_string(), "oxirs-stream".to_string()),
                ]),
                annotations: BTreeMap::new(),
            },
            spec: HPASpec {
                scale_target_ref: ScaleTargetRef {
                    api_version: "apps/v1".to_string(),
                    kind: "Deployment".to_string(),
                    name: "oxirs-stream".to_string(),
                },
                min_replicas: Some(self.config.auto_scaling.hpa.min_replicas),
                max_replicas: self.config.auto_scaling.hpa.max_replicas,
                target_cpu_utilization_percentage: Some(self.config.auto_scaling.hpa.target_cpu_utilization as i32),
                metrics: vec![
                    MetricSpec {
                        metric_type: "Resource".to_string(),
                        resource: Some(ResourceMetricSource {
                            name: "cpu".to_string(),
                            target: MetricTarget {
                                target_type: "Utilization".to_string(),
                                average_utilization: Some(self.config.auto_scaling.hpa.target_cpu_utilization as i32),
                            },
                        }),
                    },
                    MetricSpec {
                        metric_type: "Resource".to_string(),
                        resource: Some(ResourceMetricSource {
                            name: "memory".to_string(),
                            target: MetricTarget {
                                target_type: "Utilization".to_string(),
                                average_utilization: Some(self.config.auto_scaling.hpa.target_memory_utilization as i32),
                            },
                        }),
                    },
                ],
            },
        };

        self.kubernetes_client.apply_resource(hpa).await?;
        Ok(())
    }

    /// Setup VPA
    async fn setup_vpa(&self) -> Result<()> {
        warn!("VPA setup not yet implemented");
        Ok(())
    }

    /// Get metrics
    pub async fn get_metrics(&self) -> CloudNativeMetrics {
        self.metrics.read().await.clone()
    }
}

/// Kubernetes client trait
#[async_trait::async_trait]
pub trait KubernetesClient: Send + Sync {
    async fn apply_resource(&self, resource: KubernetesResource) -> Result<()>;
    async fn delete_resource(&self, resource: KubernetesResource) -> Result<()>;
    async fn get_resource(&self, resource_type: &str, name: &str, namespace: &str) -> Result<Option<KubernetesResource>>;
    async fn list_resources(&self, resource_type: &str, namespace: &str) -> Result<Vec<KubernetesResource>>;
}

/// Service mesh client trait
#[async_trait::async_trait]
pub trait ServiceMeshClient: Send + Sync {
    async fn enable_sidecar_injection(&self, namespace: &str) -> Result<()>;
    async fn apply_destination_rules(&self, config: &TrafficManagementConfig) -> Result<()>;
    async fn apply_virtual_services(&self, config: &TrafficManagementConfig) -> Result<()>;
    async fn apply_authorization_policies(&self, config: &SecurityPolicyConfig) -> Result<()>;
}

/// Kubernetes resource
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum KubernetesResource {
    Namespace {
        metadata: ObjectMetadata,
    },
    CustomResourceDefinition(CustomResourceDefinition),
    Deployment {
        metadata: ObjectMetadata,
        spec: DeploymentSpec,
    },
    StatefulSet {
        metadata: ObjectMetadata,
        spec: StatefulSetSpec,
    },
    Service {
        metadata: ObjectMetadata,
        spec: ServiceSpec,
    },
    ConfigMap {
        metadata: ObjectMetadata,
        data: BTreeMap<String, String>,
    },
    Secret {
        metadata: ObjectMetadata,
        data: BTreeMap<String, Vec<u8>>,
    },
    ServiceMonitor(ServiceMonitor),
    HorizontalPodAutoscaler {
        metadata: ObjectMetadata,
        spec: HPASpec,
    },
}

/// Deployment specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DeploymentSpec {
    pub replicas: u32,
    pub selector: LabelSelector,
    pub template: PodTemplateSpec,
}

/// StatefulSet specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct StatefulSetSpec {
    pub replicas: u32,
    pub selector: LabelSelector,
    pub template: PodTemplateSpec,
    pub volume_claim_templates: Vec<VolumeClaimTemplate>,
}

/// Pod template specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PodTemplateSpec {
    pub metadata: ObjectMetadata,
    pub spec: PodSpec,
}

/// Pod specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PodSpec {
    pub containers: Vec<Container>,
    pub service_account: Option<String>,
}

/// Container specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Container {
    pub name: String,
    pub image: String,
    pub resources: Option<ResourceRequirements>,
    pub env: Vec<EnvVar>,
    pub ports: Vec<ContainerPort>,
}

/// Environment variable
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EnvVar {
    pub name: String,
    pub value: String,
}

/// Container port
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ContainerPort {
    pub name: String,
    pub container_port: u16,
    pub protocol: String,
}

/// Service specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ServiceSpec {
    pub selector: LabelSelector,
    pub ports: Vec<ServicePort>,
    pub service_type: String,
}

/// Service port
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ServicePort {
    pub name: String,
    pub port: u16,
    pub target_port: u16,
    pub protocol: String,
}

/// Volume claim template
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct VolumeClaimTemplate {
    pub metadata: ObjectMetadata,
    pub spec: VolumeClaimSpec,
}

/// Volume claim specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct VolumeClaimSpec {
    pub access_modes: Vec<String>,
    pub resources: ResourceRequirements,
}

/// HPA specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct HPASpec {
    pub scale_target_ref: ScaleTargetRef,
    pub min_replicas: Option<u32>,
    pub max_replicas: u32,
    pub target_cpu_utilization_percentage: Option<i32>,
    pub metrics: Vec<MetricSpec>,
}

/// Scale target reference
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ScaleTargetRef {
    pub api_version: String,
    pub kind: String,
    pub name: String,
}

/// Metric specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MetricSpec {
    #[serde(rename = "type")]
    pub metric_type: String,
    pub resource: Option<ResourceMetricSource>,
}

/// Resource metric source
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourceMetricSource {
    pub name: String,
    pub target: MetricTarget,
}

/// Metric target
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MetricTarget {
    #[serde(rename = "type")]
    pub target_type: String,
    pub average_utilization: Option<i32>,
}

/// Cloud-native metrics
#[derive(Debug, Clone, Default)]
pub struct CloudNativeMetrics {
    pub deployments_created: u64,
    pub deployments_updated: u64,
    pub deployments_deleted: u64,
    pub pods_running: u64,
    pub service_mesh_enabled: bool,
    pub auto_scaling_events: u64,
    pub last_deployment_time: Option<DateTime<Utc>>,
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_cloud_native_config_defaults() {
        let config = CloudNativeConfig::default();
        assert!(config.kubernetes.enabled);
        assert_eq!(config.kubernetes.namespace, "oxirs");
        assert!(config.service_mesh.enabled);
        assert_eq!(config.service_mesh.provider, ServiceMeshProvider::Istio);
        assert!(config.auto_scaling.enabled);
    }

    #[test]
    fn test_custom_resource_definition_creation() {
        let crd = CustomResourceDefinition::stream_processor();
        assert_eq!(crd.kind, "CustomResourceDefinition");
        assert_eq!(crd.spec.group, "oxirs.io");
        assert_eq!(crd.spec.names.kind, "StreamProcessor");
    }

    #[test]
    fn test_kubernetes_config_serialization() {
        let config = KubernetesConfig::default();
        let serialized = serde_json::to_string(&config).unwrap();
        let deserialized: KubernetesConfig = serde_json::from_str(&serialized).unwrap();
        assert_eq!(config.namespace, deserialized.namespace);
        assert_eq!(config.enabled, deserialized.enabled);
    }

    #[test]
    fn test_service_mesh_config() {
        let config = ServiceMeshConfig::default();
        assert!(config.enabled);
        assert!(config.mtls.enabled);
        assert_eq!(config.mtls.mode, MutualTLSMode::Strict);
        assert_eq!(config.traffic_management.load_balancing, LoadBalancingStrategy::RoundRobin);
    }

    #[test]
    fn test_auto_scaling_config() {
        let config = AutoScalingConfig::default();
        assert!(config.enabled);
        assert!(config.hpa.enabled);
        assert_eq!(config.hpa.min_replicas, 2);
        assert_eq!(config.hpa.max_replicas, 100);
        assert_eq!(config.hpa.target_cpu_utilization, 70.0);
    }

    #[test]
    fn test_observability_config() {
        let config = ObservabilityConfig::default();
        assert!(config.monitoring.prometheus.enabled);
        assert!(config.dashboards.grafana.enabled);
        assert_eq!(config.dashboards.grafana.admin_user, "admin");
    }

    #[test]
    fn test_gitops_config() {
        let config = GitOpsConfig::default();
        assert!(config.enabled);
        assert_eq!(config.provider, GitOpsProvider::ArgoCD);
        assert!(config.sync.auto_sync);
        assert!(config.sync.prune);
        assert!(config.sync.self_heal);
    }
}