ccswarm 0.4.0

//! Base implementation for common session functionality
//!
//! This module provides a base implementation of the session traits that can be
//! used as a foundation for specific session types.

use anyhow::Result;
use chrono::{DateTime, Utc};
use std::collections::HashMap;
use std::path::{Path, PathBuf};
use std::time::Duration;
use uuid::Uuid;

use super::traits::*;
use crate::agent::{Task, TaskResult};

/// Base session implementation with common functionality
pub struct BaseSession {
    /// Unique session ID
    id: String,
    /// Session type name
    session_type: String,
    /// Current status
    status: SessionStatus,
    /// Creation timestamp
    created_at: DateTime<Utc>,
    /// Last activity timestamp
    last_activity: DateTime<Utc>,
    /// Working directory
    working_directory: PathBuf,
    /// Environment variables
    env_vars: HashMap<String, String>,
    /// Efficiency statistics
    stats: EfficiencyStats,
    /// Number of tasks completed
    tasks_completed: usize,
}

impl BaseSession {
    /// Create a new base session
    pub fn new(config: SessionConfig) -> Self {
        let id = format!("session-{}", Uuid::new_v4());
        let working_directory = config
            .working_directory
            .map(PathBuf::from)
            .unwrap_or_else(|| PathBuf::from("."));

        let mut env_vars = config.env_vars;
        // Add standard environment variables
        env_vars.extend(<Self as SessionEnvironment>::create_env_vars(
            &config.agent_id,
            &id,
        ));

        Self {
            id,
            session_type: "base".to_string(),
            status: SessionStatus::Initializing,
            created_at: Utc::now(),
            last_activity: Utc::now(),
            working_directory,
            env_vars,
            stats: EfficiencyStats::default(),
            tasks_completed: 0,
        }
    }

    /// Set the session type (for derived implementations)
    pub fn set_session_type(&mut self, session_type: String) {
        self.session_type = session_type;
    }
}

// Implement the traits
impl SessionLifecycle for BaseSession {
    async fn initialize(&mut self) -> Result<()> {
        // Basic initialization
        self.status = SessionStatus::Active;
        self.touch();
        Ok(())
    }

    async fn shutdown(&mut self) -> Result<()> {
        self.status = SessionStatus::Terminating;
        // Perform cleanup...
        self.status = SessionStatus::Terminated;
        Ok(())
    }

    fn get_status(&self) -> SessionStatus {
        self.status
    }

    fn update_status(&mut self, status: SessionStatus) {
        self.status = status;
        self.touch();
    }
}

#[async_trait::async_trait]
impl TaskExecutor for BaseSession {
    async fn execute_task(&mut self, task: Task) -> Result<TaskResult> {
        // Update status
        self.update_status(SessionStatus::Busy);

        // This is a placeholder - derived classes should override
        let start_time = std::time::Instant::now();

        // Simulate task execution
        tokio::time::sleep(Duration::from_millis(100)).await;

        let result = TaskResult {
            success: true,
            output: serde_json::json!({
                "task_id": task.id,
                "message": "Task completed"
            }),
            error: None,
            duration: start_time.elapsed(),
        };

        // Update statistics
        let duration = start_time.elapsed();
        self.update_task_stats(&result, duration);

        // Update status back to active
        self.update_status(SessionStatus::Active);

        Ok(result)
    }
}

impl SessionMetadata for BaseSession {
    fn get_id(&self) -> &str {
        &self.id
    }

    fn get_created_at(&self) -> DateTime<Utc> {
        self.created_at
    }

    fn get_last_activity(&self) -> DateTime<Utc> {
        self.last_activity
    }

    fn touch(&mut self) {
        self.last_activity = Utc::now();
    }

    fn get_session_type(&self) -> &str {
        &self.session_type
    }
}

impl SessionEnvironment for BaseSession {
    fn get_working_directory(&self) -> &Path {
        &self.working_directory
    }

    fn get_env_vars(&self) -> &HashMap<String, String> {
        &self.env_vars
    }
}

impl SessionStatistics for BaseSession {
    fn get_tasks_completed(&self) -> usize {
        self.tasks_completed
    }

    fn get_efficiency_stats(&self) -> EfficiencyStats {
        self.stats.clone()
    }

    fn update_task_stats(&mut self, result: &TaskResult, duration: Duration) {
        self.stats.total_tasks += 1;
        if result.success {
            self.stats.successful_tasks += 1;
        } else {
            self.stats.failed_tasks += 1;
        }

        self.stats.total_duration += duration;
        if self.stats.total_tasks > 0 {
            self.stats.average_task_duration =
                self.stats.total_duration / self.stats.total_tasks as u32;
        }

        self.tasks_completed += 1;
        self.touch();
    }

    fn reset_stats(&mut self) {
        self.stats = EfficiencyStats::default();
        self.tasks_completed = 0;
    }
}

// Implement the combined Session trait
impl Session for BaseSession {}

/// Generic session manager that can work with any session type
pub struct GenericSessionManager<S: Session + 'static> {
    _sessions:
        std::sync::Arc<tokio::sync::Mutex<HashMap<String, std::sync::Arc<tokio::sync::Mutex<S>>>>>,
    _phantom: std::marker::PhantomData<S>,
}

impl<S: Session + 'static> GenericSessionManager<S> {
    /// Create a new generic session manager
    pub fn new() -> Self {
        Self {
            _sessions: std::sync::Arc::new(tokio::sync::Mutex::new(HashMap::new())),
            _phantom: std::marker::PhantomData,
        }
    }
}

impl<S: Session + 'static> Default for GenericSessionManager<S> {
    fn default() -> Self {
        Self::new()
    }
}

// Implement session manager trait would go here, but it needs the concrete type
// This is left as an exercise for specific implementations