coalescent 0.1.0

//! Coordination patterns for AI collaboration
//!
//! This module defines reusable patterns for common coordination scenarios.

use crate::error::Result;

/// Types of coordination patterns
#[derive(Debug, Clone, PartialEq)]
pub enum PatternType {
    /// Sequential task execution
    Sequential,
    /// Parallel task execution
    Parallel,
    /// Hierarchical coordination with leaders
    Hierarchical,
    /// Peer-to-peer collaboration
    PeerToPeer,
    /// Voting-based decision making
    VotingBased,
    /// Auction-based task assignment
    AuctionBased,
}

/// A coordination pattern that can be applied to agent collaborations
pub trait CoordinationPattern: Send + Sync {
    /// Get the pattern type
    fn pattern_type(&self) -> PatternType;
    
    /// Get a description of this pattern
    fn description(&self) -> &str;
    
    /// Execute the coordination pattern (simplified for demo)
    fn execute(&self) -> Result<String>;
}

/// Sequential coordination pattern
pub struct SequentialPattern {
    pub description: String,
}

impl SequentialPattern {
    pub fn new() -> Self {
        Self {
            description: "Sequential task execution pattern".to_string(),
        }
    }
}

impl CoordinationPattern for SequentialPattern {
    fn pattern_type(&self) -> PatternType {
        PatternType::Sequential
    }
    
    fn description(&self) -> &str {
        &self.description
    }
    
    fn execute(&self) -> Result<String> {
        // Placeholder implementation
        Ok("Sequential pattern executed".to_string())
    }
}

impl Default for SequentialPattern {
    fn default() -> Self {
        Self::new()
    }
}

/// Parallel coordination pattern
pub struct ParallelPattern {
    pub description: String,
}

impl ParallelPattern {
    pub fn new() -> Self {
        Self {
            description: "Parallel task execution pattern".to_string(),
        }
    }
}

impl CoordinationPattern for ParallelPattern {
    fn pattern_type(&self) -> PatternType {
        PatternType::Parallel
    }
    
    fn description(&self) -> &str {
        &self.description
    }
    
    fn execute(&self) -> Result<String> {
        // Placeholder implementation
        Ok("Parallel pattern executed".to_string())
    }
}

impl Default for ParallelPattern {
    fn default() -> Self {
        Self::new()
    }
}

/// Pattern factory for creating coordination patterns
pub struct PatternFactory;

impl PatternFactory {
    /// Create a coordination pattern of the specified type
    pub fn create_pattern(pattern_type: PatternType) -> Box<dyn CoordinationPattern> {
        match pattern_type {
            PatternType::Sequential => Box::new(SequentialPattern::new()),
            PatternType::Parallel => Box::new(ParallelPattern::new()),
            PatternType::Hierarchical => Box::new(SequentialPattern::new()), // Placeholder
            PatternType::PeerToPeer => Box::new(ParallelPattern::new()), // Placeholder
            PatternType::VotingBased => Box::new(SequentialPattern::new()), // Placeholder
            PatternType::AuctionBased => Box::new(SequentialPattern::new()), // Placeholder
        }
    }
}

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

    #[tokio::test]
    async fn test_pattern_creation() {
        let pattern = PatternFactory::create_pattern(PatternType::Sequential);
        assert_eq!(pattern.pattern_type(), PatternType::Sequential);
        
        let result = pattern.execute().unwrap();
        assert!(!result.is_empty());
    }

    #[test]
    fn test_pattern_types() {
        assert_eq!(PatternType::Sequential, PatternType::Sequential);
        assert_ne!(PatternType::Sequential, PatternType::Parallel);
    }
}