use crate::*;
use semantic::*;

use std::collections::HashMap;


pub struct Environment {
    pub scopes: Vec<Scope>,
}

impl Environment {
    pub fn get_integer(&self, name: &str) -> Result<usize, ()> {
        for scope in self.scopes.iter().rev() {
            if let Ok(value) = scope.get_integer(name, &self) {
                return Ok(value);
            }
        }
        return Err(());
    }

    pub fn get_block(&self, name: &str) -> Result<usize, ()> {
        for scope in self.scopes.iter().rev() {
            if let Ok(value) = scope.get_block(name, &self) {
                return Ok(value);
            }
        }
        return Err(());
    }
}

pub struct Scope {
    pub definitions: HashMap<String, Definition>,
}

impl Scope {
    pub fn get_integer(&self, _name: &str, _environment: &Environment) -> Result<usize, ()> {
        todo!()
        // use semantic::IntegerDefinition as IntDef;

        // if let Some(Definition { variant, ..}) = self.definitions.get(name) {
        //     if let IntegerDefinition::Integer(integer) = definition {
        //         match integer {
        //             IntDef::Literal(value) => return Ok(*value),
        //             IntDef::ConstantExpression(expr) => match expr.evaluate(environment) {
        //                 Ok(_) | Err(_) => todo!(),
        //             },
        //         };
        //     }
        // }
        // return Err(());
    }

    pub fn get_block(&self, _name: &str, _environment: &Environment) -> Result<usize, ()> {
        todo!()
    }
}