amberjs 1.17.0

// Edge Runtime Management
// High-performance edge runtime with minimal cold start times and resource management

use anyhow::{Result, anyhow};
use serde::{Deserialize, Serialize};
use std::collections::BTreeMap;
use std::sync::{Arc, Mutex, RwLock};
use tokio::time::{TokioDuration, TokioInstant};
use std::time::{Duration, Instant};
use std::collections::HashMap;
use std::time::SystemTime;

/// Edge Runtime instance
#[derive(Debug)]
pub struct EdgeRuntimeInstance {
    pub id: String,
    pub region: String,
    pub is_warm: bool,
    pub last_used: std::time::SystemTime,
    pub execution_count: u64,
}
/// Edge Runtime Manager with resource management
#[derive(Debug)]
pub struct EdgeRuntime {
    instances: Arc<RwLock<HashMap<String, EdgeRuntimeInstance>>>,
    warm_regions: Arc<RwLock<Vec<String>>>,
    prewarm_pool: Arc<RwLock<Vec<String>>>,
    stats: Arc<RwLock<RuntimeStats>>,
    resource_manager: Arc<EdgeResourceManager>,
}
/// Runtime statistics
#[derive(Debug, Clone)]
pub struct RuntimeStats {
    pub total_cold_starts: u64,
    pub total_warm_executions: u64,
    pub average_cold_start_ms: f64,
    pub average_warm_execution_ms: f64,
}
/// Resource allocation request
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourceRequest {
    pub cpu_cores: u32,
    pub memory_mb: u64,
    pub timeout_ms: u64,
}
/// Resource allocation result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourceAllocation {
    pub allocated: bool,
    pub cpu_cores: u32,
    pub memory_mb: u64,
}
/// Resource usage metrics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourceUsage {
    pub cpu_usage_percent: f64,
    pub memory_usage_mb: u64,
    pub active_instances: u32,
}
/// Battery monitor
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct BatteryMonitor {
    pub is_supported: bool,
    pub level_percent: Option<f64>,
    pub is_charging: bool,
}
/// Resource quota
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourceQuota {
    pub max_cpu_cores: u32,
    pub max_memory_mb: u64,
}
/// Edge Resource Manager
#[derive(Debug)]
pub struct EdgeResourceManager {
    cpu_limit: ResourceQuota,
    memory_limit: ResourceQuota,
    battery_monitor: Arc<RwLock<BatteryMonitor>>,
    current_usage: Arc<RwLock<ResourceUsage>>,
}
/// Execution context for runtime operations
#[derive(Debug)]
pub struct RuntimeExecutionContext {
    pub instance_id: String,
    pub region: String,
    pub is_warm: bool,
    pub execution_time_ms: u64,
    pub resource_usage: ResourceUsage,
}
impl EdgeRuntime {
    /// Create a new edge runtime manager
    pub fn new() -> Self {
        EdgeRuntime {
            instances: Arc::new(Mutex::new(HashMap::new()))
            warm_regions: Arc::new(Mutex::new(Vec::new()))
            prewarm_pool: Arc::new(Mutex::new(Vec::new()))
            stats: Arc::new(Mutex::new(RuntimeStats {)),
                total_cold_starts: 0,
                total_warm_executions: 0,
                average_cold_start_ms: 0.0,
                average_warm_execution_ms: 0.0,
            }))
            resource_manager: Arc::new(Mutex::new(EdgeResourceManager::new()),)
                ResourceQuota { max_cpu_cores: 32, max_memory_mb: 65536 },
                ResourceQuota { max_cpu_cores: 32, max_memory_mb: 65536 },
            ))
        }
    }
    /// Initialize the edge runtime
    pub async fn initialize(&self) -> Result<()> {
        println!("Initializing Edge Runtime with resource management...");
        Ok(())
    }
    /// Pre-warm instances in specified regions
    pub async fn prewarm_regions(&self, regions: &[String]) -> Result<()> {
        let mut warm_regions = self.warm_regions.write().await;
        for region in regions {
            if !warm_regions.contains(region) {
                // Create a warm instance
                let instance: _ = EdgeRuntimeInstance {
                    id: format!("warm-instance-{}", region),
                    region: region.clone(),
                    is_warm: true,
                    last_used: std::time::SystemTime::now(),
                    execution_count: 0,
                };
                let mut instances = self.instances.write().await;
                instances.insert(instance.id.clone(), instance);
                warm_regions.push(region.clone());
                println!("Pre-warmed region: {}", region);
            }
        }
        Ok(())
    }
    /// Get a runtime instance for a region
    pub async fn get_instance(&self, region: &str) -> Result<RuntimeExecutionContext> {
        let instances: _ = self.instances.read().await;
        // Check for warm instance
        if let Some(instance) = instances.values().find(|i| i.region == region && i.is_warm) {
            let start: _ = Instant::now();
            // Simulate warm execution (very fast)
            tokio::time::sleep(Duration::from_millis(2)).await;
            let execution_time: _ = start.elapsed();
            // Update stats
            {
                let mut stats = self.stats.write().await;
                stats.total_warm_executions += 1;
                stats.average_warm_execution_ms =
                    (stats.average_warm_execution_ms + execution_time.as_millis() as f64) / 2.0;
            }
            let context: _ = RuntimeExecutionContext {
                instance_id: instance.id.clone(),
                region: instance.region.clone(),
                is_warm: true,
                execution_time_ms: execution_time.as_millis() as u64,
                resource_usage: ResourceUsage {
                    cpu_usage_percent: 5.0, // Low for warm execution
                    memory_usage_mb: 128,   // Base memory for warm instance
                    active_instances: instances.len() as u32,
                },
            };
            Ok(context)
        } else {
            // Cold start
            let start: _ = Instant::now();
            tokio::time::sleep(Duration::from_millis(50)).await; // Simulate cold start
            let execution_time: _ = start.elapsed();
            // Update stats
            {
                let mut stats = self.stats.write().await;
                stats.total_cold_starts += 1;
                stats.average_cold_start_ms =
                    (stats.average_cold_start_ms + execution_time.as_millis() as f64) / 2.0;
            }
            let context: _ = RuntimeExecutionContext {
                instance_id: format!("cold-instance-{}", region),
                region: region.to_string(),
                is_warm: false,
                execution_time_ms: execution_time.as_millis() as u64,
                resource_usage: ResourceUsage {
                    cpu_usage_percent: 15.0, // Higher for cold start
                    memory_usage_mb: 256,    // Higher memory for cold start
                    active_instances: instances.len() as u32,
                },
            };
            Ok(context)
        }
    }
    /// Execute a script with resource management
    pub async fn execute_script(
        &self,
        script: &str,
        resource_request: Option<ResourceRequest>,
    ) -> Result<ExecutionResult> {
        // Allocate resources if requested
        if let Some(request) = resource_request {
            let allocation: _ = self.resource_manager.allocate_resources(&request).await?;
            if !allocation.allocated {
                return Err(anyhow!("Failed to allocate resources"));
            }
        }
        // Get execution context
        let context: _ = self.get_instance("default").await?;
        // Simulate script execution
        let start: _ = Instant::now();
        tokio::time::sleep(Duration::from_millis(10)).await; // Simulate execution
        let execution_time: _ = start.elapsed().as_millis() as u64;
        let result: _ = ExecutionResult {
            success: true,
            output: Some("Script executed successfully".to_string()),
            error: None,
            execution_time_ms: execution_time,
            resource_usage: Some(context.resource_usage),
        };
        Ok(result)
    }
    /// Preload modules for faster execution
    pub async fn preload_modules(&self, modules: &[String]) -> Result<()> {
        println!("Preloading {} modules", modules.len());
        tokio::time::sleep(Duration::from_millis(modules.len() as u64)).await;
        Ok(())
    }
    /// Get resource manager
    pub fn resource_manager(&self) -> Arc<EdgeResourceManager> {
        self.resource_manager.clone()
    }
    /// Get runtime statistics
    pub async fn get_stats(&self) -> RuntimeStats {
        self.stats.read().await.clone()
    }
}
impl EdgeResourceManager {
    /// Create a new resource manager
    pub fn new(cpu_limit: ResourceQuota, memory_limit: ResourceQuota) -> Self {
        EdgeResourceManager {
            cpu_limit,
            memory_limit,
            battery_monitor: Arc::new(Mutex::new(BatteryMonitor {)),
                is_supported: false,
                level_percent: None,
                is_charging: false,
            }))
            current_usage: Arc::new(Mutex::new(ResourceUsage {)),
                cpu_usage_percent: 0.0,
                memory_usage_mb: 0,
                active_instances: 0,
            }))
        }
    }
    /// Allocate resources for a task
    pub async fn allocate_resources(&self, request: &ResourceRequest) -> Result<ResourceAllocation> {
        let mut usage = self.current_usage.write().await;
        // Check if resources are available
        if usage.cpu_usage_percent + (request.cpu_cores as f64 / self.cpu_limit.max_cpu_cores as f64) * 100.0 <= 100.0
            && usage.memory_usage_mb + request.memory_mb <= self.memory_limit.max_memory_mb {
            // Allocate resources
            usage.cpu_usage_percent += (request.cpu_cores as f64 / self.cpu_limit.max_cpu_cores as f64) * 100.0;
            usage.memory_usage_mb += request.memory_mb;
            usage.active_instances += 1;
            Ok(ResourceAllocation {
                allocated: true,
                cpu_cores: request.cpu_cores,
                memory_mb: request.memory_mb,
            })
        } else {
            Ok(ResourceAllocation {
                allocated: false,
                cpu_cores: 0,
                memory_mb: 0,
            })
        }
    }
    /// Monitor current resource usage
    pub async fn monitor_usage(&self) -> Result<ResourceUsage> {
        let usage: _ = self.current_usage.read().await;
        Ok(usage.clone())
    }
    /// Get battery status (if supported)
    pub async fn get_battery_status(&self) -> Result<BatteryMonitor> {
        let battery: _ = self.battery_monitor.read().await;
        Ok(battery.clone())
    }
    /// Check if resource limits are exceeded
    pub async fn check_limits(&self) -> Result<bool> {
        let usage: _ = self.current_usage.read().await;
        Ok(usage.cpu_usage_percent > 95.0 || usage.memory_usage_mb > self.memory_limit.max_memory_mb * 95 / 100)
    }
}
/// Execution result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ExecutionResult {
    pub success: bool,
    pub output: Option<String>,
    pub error: Option<String>,
    pub execution_time_ms: u64,
    pub resource_usage: Option<ResourceUsage>,
}
impl Default for EdgeRuntime {
    fn default() -> Self {
        Self::new()
    }
}