//! Edge CRUD operations.

use crate::types::{Result, Edge};
use crate::storage::Storage;
use uuid::Uuid;

/// Edge manager for graph relationships.
pub struct EdgeManager {
    storage: Storage,
}

impl EdgeManager {
    /// Create new edge manager.
    pub fn new(storage: Storage) -> Self {
        todo!("Implement EdgeManager::new")
    }

    /// Create edge between entities.
    ///
    /// Stores both forward and reverse edges for bidirectional traversal.
    ///
    /// # Arguments
    ///
    /// * `edge` - Edge to create
    ///
    /// # Errors
    ///
    /// Returns `DatabaseError::GraphError` if creation fails
    pub fn create_edge(&self, edge: &Edge) -> Result<()> {
        todo!("Implement EdgeManager::create_edge")
    }

    /// Get edge by source, destination, and type.
    ///
    /// # Arguments
    ///
    /// * `src` - Source entity UUID
    /// * `dst` - Destination entity UUID
    /// * `rel_type` - Relationship type
    ///
    /// # Returns
    ///
    /// Edge if found
    ///
    /// # Errors
    ///
    /// Returns `DatabaseError::GraphError` if lookup fails
    pub fn get_edge(&self, src: Uuid, dst: Uuid, rel_type: &str) -> Result<Option<Edge>> {
        todo!("Implement EdgeManager::get_edge")
    }

    /// Get all outgoing edges from entity.
    ///
    /// # Arguments
    ///
    /// * `src` - Source entity UUID
    /// * `rel_type` - Optional relationship type filter
    ///
    /// # Returns
    ///
    /// Vector of edges
    ///
    /// # Errors
    ///
    /// Returns `DatabaseError::GraphError` if lookup fails
    pub fn get_outgoing(&self, src: Uuid, rel_type: Option<&str>) -> Result<Vec<Edge>> {
        todo!("Implement EdgeManager::get_outgoing")
    }

    /// Get all incoming edges to entity.
    ///
    /// # Arguments
    ///
    /// * `dst` - Destination entity UUID
    /// * `rel_type` - Optional relationship type filter
    ///
    /// # Returns
    ///
    /// Vector of edges
    ///
    /// # Errors
    ///
    /// Returns `DatabaseError::GraphError` if lookup fails
    pub fn get_incoming(&self, dst: Uuid, rel_type: Option<&str>) -> Result<Vec<Edge>> {
        todo!("Implement EdgeManager::get_incoming")
    }

    /// Delete edge.
    ///
    /// Removes both forward and reverse edges.
    ///
    /// # Arguments
    ///
    /// * `src` - Source entity UUID
    /// * `dst` - Destination entity UUID
    /// * `rel_type` - Relationship type
    ///
    /// # Errors
    ///
    /// Returns `DatabaseError::GraphError` if deletion fails
    pub fn delete_edge(&self, src: Uuid, dst: Uuid, rel_type: &str) -> Result<()> {
        todo!("Implement EdgeManager::delete_edge")
    }
}
