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//! Domain service for monadic composition and transformation.
//!
//! This encapsulates the mathematical laws and operations of monads.
use crate::eval::Value;
use crate::diagnostics::Error;
use std::sync::Arc;
use std::collections::HashMap;
use super::{
monadic_computation::MonadicComputation,
monad_type::MonadType,
monad_configuration::MonadConfiguration,
custom_monad_definition::CustomMonadDefinition,
};
/// Domain service for monadic composition and transformation.
///
/// This encapsulates the mathematical laws and operations of monads.
#[derive(Debug, Default)]
pub struct MonadService {
/// Configuration for monadic operations
config: MonadConfiguration,
}
impl MonadService {
/// Create a new monad service with default configuration
pub fn new() -> Self {
Self {
config: MonadConfiguration::default(),
}
}
/// Create a monad service with custom configuration
pub fn with_config(config: MonadConfiguration) -> Self {
Self { config }
}
/// Apply the functor map operation to a monadic computation
pub fn map<T, U, F>(
&self,
computation: MonadicComputation<T>,
function: F,
) -> MonadicComputation<U>
where
F: Fn(T) -> U + Send + Sync + 'static,
T: Clone + Send + Sync + 'static,
U: Clone + Send + Sync + 'static,
{
match computation {
MonadicComputation::Pure(value) => {
MonadicComputation::Pure(function(value))
}
MonadicComputation::Maybe(maybe) => {
MonadicComputation::Maybe(maybe.map(function))
}
MonadicComputation::Either(either) => {
MonadicComputation::Either(either.map(function))
}
_ => {
// TODO: Implement proper monadic transformation for complex cases
// For now, we panic to indicate this needs proper implementation
panic!("Complex monadic map operations not yet implemented - need proper type conversion system")
}
}
}
/// Apply monadic bind (flatMap) operation
pub fn bind<T, U, F>(
&self,
computation: MonadicComputation<T>,
function: F,
) -> MonadicComputation<U>
where
F: Fn(T) -> MonadicComputation<U> + Send + Sync + 'static,
T: Clone + Send + Sync + 'static,
U: Clone + Send + Sync + 'static,
{
// TODO: Implement proper monadic bind composition
panic!("Complex monadic bind operations not yet implemented - need proper type conversion system")
}
/// Create a pure monadic computation
pub fn pure<T: Clone>(&self, value: T) -> MonadicComputation<T> {
MonadicComputation::Pure(value)
}
/// Lift a value into a specific monad
pub fn lift_into_monad<T>(
&self,
value: T,
monad_type: MonadType,
) -> MonadicComputation<T>
where
T: Clone + Send + Sync + 'static,
{
match monad_type {
MonadType::Identity => MonadicComputation::Pure(value),
MonadType::Maybe => {
// TODO: Implement proper Maybe monad lifting with correct types
panic!("Maybe monad lifting not yet implemented - need proper type conversion system")
}
MonadType::Either => {
// TODO: Implement proper Either monad lifting with correct types
panic!("Either monad lifting not yet implemented - need proper type conversion system")
}
_ => {
// TODO: Implement proper lifting for other monad types
panic!("Complex monad lifting not yet implemented - need proper type conversion system")
}
}
}
/// Get the configuration
pub fn config(&self) -> &MonadConfiguration {
&self.config
}
}