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use crate::construction::heuristics::InsertionContext;
use crate::solver::mutation::{LocalOperator, Mutation};
use crate::solver::RefinementContext;
use std::sync::Arc;

/// A mutation operator which applies local search principles.
pub struct LocalSearch {
    operator: Arc<dyn LocalOperator + Send + Sync>,
}

impl LocalSearch {
    /// Creates a new instance of `LocalSearch`.
    pub fn new(operator: Arc<dyn LocalOperator + Send + Sync>) -> Self {
        Self { operator }
    }
}

impl Mutation for LocalSearch {
    fn mutate(&self, refinement_ctx: &RefinementContext, insertion_ctx: &InsertionContext) -> InsertionContext {
        if let Some(new_insertion_ctx) = self.operator.explore(refinement_ctx, insertion_ctx) {
            new_insertion_ctx
        } else {
            insertion_ctx.deep_copy()
        }
    }
}